{"id":6435,"date":"2024-04-15T11:01:56","date_gmt":"2024-04-15T03:01:56","guid":{"rendered":"http:\/\/www.hellofpga.com\/?p=6435"},"modified":"2024-06-23T15:47:18","modified_gmt":"2024-06-23T07:47:18","slug":"ov7670","status":"publish","type":"post","link":"http:\/\/www.hellofpga.com\/index.php\/2024\/04\/15\/ov7670\/","title":{"rendered":"Xillinux \u7ae0\u8282\u5341\u516d \u4f7f\u7528 Smart Zynq \u4ece OV7670 \u6444\u50cf\u5934\u6a21\u5757\u8fdb\u884c\u5b9e\u65f6\u53d6\u666f\u548c\u89c6\u9891\u6355\u6349"},"content":{"rendered":"\n<p>\u672c\u6587\u6839\u636e Xillinux \uff08xillybus\uff09\u5b98\u65b9\u7684\u5b50\u7f51\u7ad9 www.01signal.com \u4e2d\u7684\u5185\u5bb9\u8f6c\u8f7d\u6574\u7406\u800c\u6765\uff0c\u5982\u5bf9\u539f\u59cb\u5185\u5bb9\u611f\u5174\u8da3\u7684\u53ef\u8bbf\u95ee\u4e0b\u5217\u94fe\u63a5\u8fdb\u884c\u67e5\u770b&nbsp;<a href=\"https:\/\/www.01signal.com\/zh\/xillinux\/ov7670-camera-capture\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u4f7f\u7528 Smart Zynq\u4ece OV7670 camera sensor \u8fdb\u884c\u5b9e\u65f6\u53d6\u666f\u548c\u89c6\u9891\u6355\u6349<\/a>  \u6216\u8005\u82f1\u6587\u539f\u5185\u5bb9 <a href=\"https:\/\/www.01signal.com\/xillinux\/ov7670-camera-capture\/\" target=\"_blank\" rel=\"noreferrer noopener\">Live view and video capture from an OV7670 camera sensor with Smart Zynq<\/a><\/p>\n\n\n\n<p>\u4e5f\u611f\u8c22xillybus \u5b98\u65b9\u5bf9\u539f\u59cb\u5185\u5bb9\u7684\u68b3\u7406\uff0c \u672c\u6587\u4ec5\u5728\u4e0a\u8ff0\u5185\u5bb9\u4e2d\u5bf9\u6587\u4e2d\u90e8\u5206\u7ffb\u8bd1\u5185\u5bb9\u505a\u4e86\u7b80\u5355\u5fae\u8c03\uff0c\u4ee5\u4fbf\u66f4\u597d\u7684\u7406\u89e3\u3002<\/p>\n\n\n\n<p>\u5907\u6ce8\uff1a\u672c\u7ae0\u8282\u5185\u5bb9\u9700\u8981\u5728xilliinux \u684c\u9762\u73af\u5883\u4e0b\u8fdb\u884c\u6f14\u793a\u3002 \u5bf9\u4e8eSP\u3001SP2\u4e3b\u677f\u53ef\u4ee5\u5728HDMI \u8f93\u51fa\u7684\u684c\u9762\u73af\u5883\u4e0b\u8fdb\u884c\u64cd\u4f5c\uff0c\u5bf9\u4e8e\u4e0d\u5e26USB\u529f\u80fd\u7684SL\u4e3b\u677f\uff0c\u5219\u53ef\u901a\u8fc7\uff08<a href=\"http:\/\/www.hellofpga.com\/index.php\/2023\/12\/24\/x-window\/\">Xillinux \u7ae0\u8282\u5341\u56db \u5728 Windows \u8ba1\u7b97\u673a\u4e0a\u8fdc\u7a0b\u663e\u793a\u5e76\u64cd\u4f5cXillinux \u684c\u9762\u53ca\u5e94\u7528<\/a>\uff09 \u7ae0\u8282\u7684\u7684\u65b9\u6cd5\u8fdb\u5165\u684c\u9762\u8fdb\u884c\u64cd\u4f5c<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>\u4ecb\u7ecd<\/strong><\/h1>\n\n\n\n<p>\u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5c06 OV7670\u6444\u50cf\u5934\u6a21\u5757\u8fde\u63a5\u5230 Smart Zynq \u5e76\u5728\u677f\u5b50\u672c\u8eab\u7684 HDMI\u8f93\u51fa\u4e0a\u67e5\u770b\u5b9e\u65f6\u89c6\u9891\u4fe1\u53f7\u3002\u6211\u8fd8\u5c06\u5c55\u793a\u5982\u4f55\u501f\u52a9\u7b80\u5355\u7684 Linux \u547d\u4ee4\u8f7b\u677e\u5730\u5c06 raw video stream \uff08\u539f\u59cb\u89c6\u9891\u6d41\uff09\u4fdd\u5b58\u5230\u6587\u4ef6\u4e2d\u3002<\/p>\n\n\n\n<p>\u672c\u6559\u7a0b\u4e2d\u7684\u4fe1\u606f\u4e5f\u9002\u7528\u4e8e\u5176\u4ed6\u7c7b\u578b\u7684 data acquisition\uff08\u6570\u636e\u91c7\u96c6\uff09 \uff1a \u4e0b\u9762\u6240\u6f14\u793a\u7684\u6280\u672f\u53ef\u7528\u4e8e\u5176\u4ed6\u56fe\u50cf\u6570\u636e\u6e90\u4ee5\u53ca\u5176\u4ed6\u6570\u5b57\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<p>\u6444\u50cf\u5934\u6a21\u5757\u8fde\u63a5\u5230 Zynq \u82af\u7247\u7684 PL (FPGA) \u90e8\u5206\u3002\u56e0\u6b64\uff0c\u5728\u5c06 image data\uff08\u56fe\u50cf\u6570\u636e\uff09\u53d1\u9001\u5230 ARM \u5904\u7406\u5668\u4e4b\u524d\uff0c\u53ef\u4ee5\u8f7b\u677e\u6dfb\u52a0\u5b9e\u73b0\u56fe\u50cf\u5904\u7406\u7684\u903b\u8f91\u3002\u7531\u4e8e\u672c\u6559\u7a0b\u57fa\u4e8e Xillinux\uff0c\u56e0\u6b64\u7cfb\u7edf\u7684 processor\u90e8\u5206\u5305\u62ec\u5b8c\u6574\u7684Linux\u53d1\u884c\u7248\u3002<\/p>\n\n\n\n<p>\u6b64\u6b21\u6f14\u793a\u9009\u62e9 OV7670 \u6444\u50cf\u5934\u6a21\u5757\u662f\u56e0\u4e3a\u8be5\u786c\u4ef6\u6a21\u5757\u4ef7\u683c\u4fbf\u5b9c\u3001\u6d41\u884c\u4e14\u6613\u4e8e\u8d2d\u4e70\u3002\u6b64\u5916\uff0c\u8be5\u7ec4\u4ef6\u751f\u6210\u7684\u6570\u5b57\u4fe1\u53f7\u5f88\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n<p>\u7136\u800c\uff0c OV7670 \u6709\u4e00\u4e2a\u4e0d\u5e78\u7684\u7f3a\u9677\uff1a \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u89c6\u9891\u6d41\u7684\u989c\u8272\u662f\u4e0d\u6b63\u786e\u3002\u8fd9\u662f\u8be5\u6444\u50cf\u5934\u4f20\u611f\u5668\u7684\u4e00\u4e2a\u5df2\u77e5\u95ee\u9898\u3002\u901a\u8fc7\u66f4\u6539\u8be5\u76f8\u673a\u7684\u5c11\u91cf\u5bc4\u5b58\u5668\u53ef\u4ee5\u7ea0\u6b63\u8fd9\u4e2a\u7f3a\u9677\u3002\u56e0\u6b64\uff0c\u672c\u6559\u7a0b\u5206\u4e3a\u4e24\u90e8\u5206\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u4f55\u5c06\u6444\u50cf\u5934\u4f20\u611f\u5668\u8fde\u63a5\u5230 Smart Zynq \u677f\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u7b80\u5355\u7684 Linux \u5de5\u5177\u8bfb\u53d6\u89c6\u9891\u6d41\u3002<\/li>\n\n\n\n<li>\u5982\u4f55\u83b7\u53d6\u5177\u6709\u6b63\u786e\u989c\u8272\u7684\u89c6\u9891\u6d41\u3002\u672c\u90e8\u5206\u5c55\u793a\u5982\u4f55\u5728Xillybus\u7cfb\u7edf\u4e0b\u4f7f\u7528I<sup>2<\/sup>C\u7684\u6765\u6539\u53d8\u6444\u50cf\u5934\u4f20\u611f\u5668\u7684\u5bc4\u5b58\u5668 \u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8bf7\u6ce8\u610f\uff0c\u672c\u6559\u7a0b\u7684\u5927\u90e8\u5206\u5185\u5bb9\u89e3\u91ca\u4e86\u5b9e\u73b0\u539f\u7406\u3002\u65e0\u9700\u4e3a\u4e86\u4f7f\u7528\u76f8\u673a\u800c\u7406\u89e3\u8fd9\u4e9b\u8bf4\u660e\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>OV7670  \u6a21\u5757<\/strong><\/h1>\n\n\n\n<p>\u672c\u6559\u7a0b\u57fa\u4e8e\u4e0b\u56fe\u6240\u793a\u7684\u6444\u50cf\u5934\u6a21\u5757\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.01signal.com\/img\/projects\/ov7670-module.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" src=\"https:\/\/www.01signal.com\/img\/projects\/ov7670-module.jpg\" alt=\"The OV7670 camera sensor module used in this project\"\/><\/a><\/figure>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u6a21\u5757\u4e0a\uff0c\u5927\u90e8\u5206\u5f15\u811a\u6392\u9488\u90fd\u76f4\u63a5\u8fde\u63a5\u5230 OV7670 \u82af\u7247\u5f15\u811a\u4e0a\u3002\u4ec5 3.3V \u548c GND \u8fde\u63a5\u5230\u7535\u6e90\u964d\u538b\u90e8\u5206\u3002\u56e0\u6b64\uff0c FPGA \u548c\u6a21\u5757\u4e4b\u95f4\u7684\u6240\u6709\u8fde\u63a5\u90fd\u662f FPGA \u548c OV7670 \u7ec4\u4ef6\u4e4b\u95f4\u7684\u76f4\u63a5\u8fde\u63a5\u3002<\/p>\n\n\n\n<p>\u5e02\u573a\u4e0a\u8fd8\u6709\u5176\u4ed6\u5177\u6709\u76f8\u540c\u529f\u80fd\u7684\u6a21\u5757\u3002\u4f7f\u7528\u8fd9\u4e9b\u5176\u4ed6\u6a21\u5757\u53ef\u80fd\u4e5f\u53ef\u4ee5\u3002\u4f46\u662f\uff0c OV7670 \u7ec4\u4ef6\u6709\u4e0d\u540c\u7684\u4fee\u8ba2\u7248\u3002\u53ef\u4ee5\u9a8c\u8bc1\u6a21\u5757\u4e0a\u4f7f\u7528\u7684\u7248\u672c\u662f\u5426\u6b63\u786e\u3002<a href=\"https:\/\/www.01signal.com\/zh\/xillinux\/ov7670-sccb-control\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u672c\u6559\u7a0b\u7684\u7b2c\u4e8c\u90e8\u5206<\/a>\u89e3\u91ca\u4e86\u5982\u4f55\u6267\u884c\u6b64\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u5907\u6ce8\uff0c\u6211\u8fd9\u8fb9\u5b9e\u9645\u6d4b\u8bd5\u53d1\u73b0\u90e8\u5206\u7f51\u7edc\u5e97\u94fa\u6240\u552e\u5356\u7684OV7670\u6444\u50cf\u5934\u6a21\u5757\u5728\u6b64\u6559\u7a0b\u4e0b\u5e76\u4e0d\u80fd\u5f88\u597d\u7684\u9002\u914d\u3002 <strong>\u8fd9\u90e8\u5206\u4e0d\u9002\u914d\u7684OV7670\u90fd\u6709\u4e00\u4e2a\u7279\u5f81\uff0c\u5c31\u662f\u5916\u90e8\u4ec5\u6709\u4e00\u8defLDO\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/strong> \u800c\u672c\u6587\u4e2d\u63d0\u5230\u7684CMOS \u662f\u6709\u4e24\u8def\u5916\u90e8LDO\u4f9b\u7535\u7684\u3002 \u5927\u5bb6\u9009\u578b\u7684\u65f6\u5019\u6ce8\u610f\u533a\u522b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"636\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-9-1024x636.png\" alt=\"\" class=\"wp-image-6705\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-9-1024x636.png 1024w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-9-300x186.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-9-768x477.png 768w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-9.png 1452w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>\u53e6\u5916\u5927\u5bb6\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4ece\u4e1d\u5370\u4e0a\u8fdb\u884c\u5224\u65ad\uff0c\u7ecf\u8fc7\u6d4b\u8bd5\u53ef\u4ee5\u6b63\u5e38\u4f7f\u7528\u7684\u6444\u50cf\u5934 1\u7684\u4e1d\u5370\u6807\u6ce8\u67095110V0\u7684\u4fe1\u606f\uff0c \u53e6\u4e00\u5757\u6807\u6ce8\uff1a2017\/3\/15 \u7684\u4fe1\u606f \uff0c\u8fd9\u4e24\u5757\u6444\u50cf\u5934\u5728\u7535\u5546\u5e73\u53f0\u4e0a\u4e5f\u5f88\u5bb9\u6613\u8d2d\u4e70\u7684\u5230\uff0c\u81f3\u4e8e\u5176\u4ed6\u7684OV7670\u5927\u5bb6\u53ef\u4ee5\u4ece\u4e0a\u6587\u4e2d\u4ecb\u7ecd\u7684LDO\u7684\u6570\u91cf\u6765\u8fdb\u884c\u5224\u65ad\u3002<\/p>\n\n\n\n<p>\u6709\u5173 OV7670\u7684\u4fe1\u606f\u4e3b\u8981\u6709\u4e24\u4e2a\u6765\u6e90\u3002\u8fd9\u4e24\u4e2a\u6587\u6863\u53ef\u4ee5\u5728\u7f51\u4e0a\u627e\u5230\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u624b\u518c\uff1a&nbsp;<em>OV7670\/OV7171 CMOS VGA (640&#215;480) CAMERA CHIP Sensor with OmniPixel Technology, Version 1.4, August 21, 2006<\/em>&nbsp;\u3002\u83b7\u53d6\u8be5\u6587\u6863\u7684 1.4 \u7248\u672c\u975e\u5e38\u91cd\u8981\u3002<\/li>\n\n\n\n<li>\u5b9e\u65bd\u6307\u5357\uff1a&nbsp;<em>OV7670\/OV7171 CMOS VGA (640&#215;480) CameraChip Implementation Guide<\/em>&nbsp;\u3002\u663e\u7136\uff0c\u7f51\u4e0a\u53ea\u80fd\u627e\u5230 Version 1.0, September 2, 2005 \u3002\u4e0d\u5e78\u7684\u662f\uff0c\u8fd9\u4e2a\u7248\u672c\u662f\u4f9d\u636e\u8f83\u65e9\u7248\u672c\u7684\u6444\u50cf\u5934\u82af\u7247\u7f16\u5199\u7684\u3002\u6240\u4ee5\u8be5\u672c\u672c\u5728\u73b0\u5728\u5df2\u7ecf\u8fc7\u65f6\u4e86\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u51c6\u5907Vivado\u9879\u76ee<\/strong> <\/h2>\n\n\n\n<p>\u4ece\u6f14\u793a\u5305\u7684zip\u6587\u4ef6\uff08\u542f\u52a8\u5206\u533a\u5957\u4ef6\uff09\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Vivado\u9879\u76ee\u3002\u5728\u6587\u672c\u7f16\u8f91\u5668\u4e2d\u6253\u5f00verilog\/src\/xillydemo.v\u3002\u5220\u9664\u6807\u8bb0\u4e3a\u201cPART 2\u201d\u7684\u4ee3\u7801\u90e8\u5206\u3002\u53d6\u800c\u4ee3\u4e4b\uff0c\u63d2\u5165\u4ee5\u4e0b\u4ee3\u7801\u7247\u6bb5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\/*\n    * PART 2\n    * ======\n    *\n    * This code demonstrates a frame grabber (data acquisition) from\n    * an OV7670 camera module.\n    *\n    *\/\n\n   reg [1:0]  clkdiv;\n\n   always @(posedge bus_clk)\n     clkdiv &lt;= clkdiv + 1;\n\n   assign J6[10] = clkdiv[1]; \/\/ MCLK \/ XCLK\n\n   assign J6[0] = 0; \/\/ PWDN, the camera is always on\n   assign J6[1] = !user_w_write_32_open; \/\/ RESET#, active low\n\n   wire [7:0] D_in;\n   wire       pclk_in, hsync_in, vsync_in;\n\n   assign D_in = J6[9:2];\n   assign pclk_in = J6[11];\n   assign hsync_in = J6[12];\n   assign vsync_in = J6[13];\n\n   (* IOB = \"TRUE\" *) reg [7:0] D_guard;\n   (* IOB = \"TRUE\" *) reg       pclk_guard, hsync_guard, vsync_guard;\n\n   reg [7:0]  D;\n   reg \t      pclk, hsync, vsync;\n\n   always @(posedge bus_clk)\n     begin\n\t\/\/ Metastability guards on asynchronous inputs\n\tD_guard &lt;= D_in;\n\tpclk_guard &lt;= pclk_in;\n\thsync_guard &lt;= hsync_in;\n\tvsync_guard &lt;= vsync_in;\n\n\tD &lt;= D_guard;\n\tpclk &lt;= pclk_guard;\n\thsync &lt;= hsync_guard;\n\tvsync &lt;= vsync_guard;\n     end\n\n   wire       sample_valid;\n   reg \t      previous_pclk;\n\n   always @(posedge bus_clk)\n     previous_pclk &lt;= pclk;\n\n   assign sample_valid = pclk &amp;&amp; !previous_pclk;\n\n   \/\/ wait_for_frame's purpose is to start getting data from the camera\n   \/\/ at the beginning of a frame.\n   reg \t      wait_for_frame;\n\n   always @(posedge bus_clk)\n     if (!user_r_read_32_open)\n       wait_for_frame &lt;= 1;\n     else if (sample_valid &amp;&amp; vsync)\n       wait_for_frame &lt;= 0;\n\n   \/\/ fifo_has_been_full changes to '1' when the FIFO becomes full, so\n   \/\/ that the data acquisition stops and an EOF is sent to the host.\n   \/\/ This ensures that the data that arrives to the host is contiguous.\n\n   reg \t      fifo_has_been_nonfull, fifo_has_been_full;\n   wire       fifo_full;\n\n   always @(posedge bus_clk)\n     begin\n\tif (!fifo_full)\n\t  fifo_has_been_nonfull &lt;= 1;\n\telse if (!user_r_read_32_open)\n\t  fifo_has_been_nonfull &lt;= 0;\n\n\tif (fifo_full &amp;&amp; fifo_has_been_nonfull)\n\t  fifo_has_been_full &lt;= 1;\n\telse if (!user_r_read_32_open)\n\t  fifo_has_been_full &lt;= 0;\n     end\n\n   assign user_r_read_32_eof = fifo_has_been_full &amp;&amp; user_r_read_32_empty;\n\n   \/\/ This part writes pixels from the camera to the FIFO\n\n   reg \t      fifo_wr_en;\n   reg [1:0]  byte_position;\n   reg [31:0] dataword;\n\n   always @(posedge bus_clk)\n     if (wait_for_frame)\n       begin\n\t  byte_position &lt;= 0;\n\t  fifo_wr_en &lt;= 0;\n       end\n     else if (sample_valid &amp;&amp; hsync)\n       begin\n\t  case (byte_position)\n\t    0: dataword[7:0] &lt;= D;\n\t    1: dataword[15:8] &lt;= D;\n\t    2: dataword[23:16] &lt;= D;\n\t    3: dataword[31:24] &lt;= D;\n\t  endcase\n\n\t  if (byte_position == 3)\n\t    fifo_wr_en &lt;= !fifo_has_been_full;\n\t  else\n\t    fifo_wr_en &lt;= 0;\n\n\t  byte_position &lt;= byte_position + 1;\n       end\n     else\n       fifo_wr_en &lt;= 0;\n\n   fifo_32x512 fifo_32\n     (\n      .clk(bus_clk),\n      .srst(!user_r_read_32_open),\n\n      .din(dataword),\n      .wr_en(fifo_wr_en),\n      .full(fifo_full),\n\n      .rd_en(user_r_read_32_rden),\n      .dout(user_r_read_32_data),\n      .empty(user_r_read_32_empty)\n      );\n\n<\/pre>\n\n\n\n<p>\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u4ece<a href=\"https:\/\/raw.githubusercontent.com\/billauer\/smartzynq-projects\/master\/ov7670-1\/xillydemo.v\" target=\"_blank\" rel=\"noreferrer noopener\">\u6b64\u5904<\/a> (\u6b64\u94fe\u63a5\u6765\u81eagithub\uff0c\u9700\u8981\u79d1\u5b66\u4e0a\u7f51)\u4e0b\u8f7d\u6b64\u66f4\u6539\u540e\u7684 xillydemo.v \u3002\u5982\u4f60\u5f53\u524d\u65e0\u79d1\u5b66\u4e0a\u7f51\u6761\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u4ece\u672c\u7ad9\u94fe\u63a5\u8fdb\u884c\u4e0b\u8f7d\uff0c\u8bb0\u5f97\u4e0b\u8f7d\u540e\u89e3\u538b\u7f29\u5f97\u5230xillydemo.v\u6587\u4ef6<\/p>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-8fb49ba3-311d-4b78-a451-1f13f8a8df71\" href=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/xillydemo.zip\">xillydemo<\/a><a href=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/xillydemo.zip\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-8fb49ba3-311d-4b78-a451-1f13f8a8df71\">\u4e0b\u8f7d<\/a><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>\u8fdb\u884c\u6b64\u66f4\u6539\u540e\uff08\u6309\u4e0a\u6587\u4ecb\u7ecd\u7684\u63d2\u5165PART 2\u90e8\u5206\u4ee3\u7801\uff0c\u6216\u8005\u66ff\u6362\u5b8c\u6574xillydemo.v\u6587\u4ef6\uff09\u4e4b\u540e\u6309\u7167\u4ee5\u5f80\u4e00\u6837\u521b\u5efa bitstream \u6587\u4ef6\u3002\u6b64 Verilog \u4ee3\u7801\u7684\u5de5\u4f5c\u539f\u7406\u5728\u672c\u9875\u4e0b\u9762\u8be6\u7ec6\u89e3\u91ca\u3002(\u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u5c06\u751f\u6210\u7684bit\u6587\u4ef6\u901a\u8fc7TF\u8bfb\u5361\u5668\u66ff\u6362TF\u5361\u4e0a\u7684\u6587\u4ef6\uff0c\u6216\u8005\u7528<a href=\"http:\/\/www.hellofpga.com\/index.php\/2023\/12\/10\/cifs2\/\">Xillinux \u7ae0\u8282\u5341\u4e8c \u5728Xillinux \u7cfb\u7edf\u4e0a\u642d\u5efa CIFS\u670d\u52a1(samba)\uff0c\u5b9e\u73b0\u4e0eWindows \u6587\u4ef6\u5171\u4eab<\/a>&nbsp; \u4e2d\u4ecb\u7ecd\u7684\u65b9\u6cd5\u901a\u8fc7\u7f51\u7edc\u66ff\u6362TF\u5361\u4e2d\u7684\u6587\u4ef6\uff08\u524d\u63d0\u662fTF card \u5df2\u6302\u5728\u5230mnt\/card\uff0c\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003<a href=\"http:\/\/www.hellofpga.com\/index.php\/2023\/12\/11\/mount\/\">Xillinux \u7ae0\u8282\u5341\u4e09 \u5728Xillinux \u7cfb\u7edf\u4e2d\u81ea\u52a8\u6302\u8f7d(mount) TF\u5361\u5206\u533a<\/a>\uff09\uff0c\u66ff\u6362\u540e\u8bb0\u5f97\u7528reboot\u547d\u4ee4\u8fdb\u884c\u91cd\u542f\uff08SSH,\u4e32\u53e3\uff0c\u6216\u8005xillinux\u684c\u9762\u73af\u5883\u7684\u547d\u4ee4\u884c\u90fd\u53ef\u4ee5\uff09)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"872\" height=\"673\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/05\/image-2.png\" alt=\"\" class=\"wp-image-6572\" style=\"width:465px;height:auto\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/05\/image-2.png 872w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/05\/image-2-300x232.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/05\/image-2-768x593.png 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>\u8fde\u63a5\u6444\u50cf\u5934\u6a21\u5757<\/strong><\/h1>\n\n\n\n<p><strong>\u6709\u4e24\u79cd\u65b9\u5f0f\u53ef\u4ee5\u8fde\u63a5\u6444\u50cf\u5934\u6a21\u5757\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7528\u675c\u90a6\u7ebf\u7684\u65b9\u5f0f\uff0801signal\u4e2d\u4ecb\u7ecd\u7684\u65b9\u5f0f<strong>\uff0c\u672c\u6587\u4e2d\u4e0b\u6587\u4ecb\u7ecd\u7684\u5185\u5bb9\u90fd\u4f1a\u4ee5\u8be5\u79cd\u65b9\u5f0f\u8fdb\u884c\u8fde\u63a5\uff09<\/strong><\/li>\n\n\n\n<li>\u7528\u672c\u7f51\u7ad9\u7684\u6444\u50cf\u5934\u8f6c\u63a5\u677f\u6765\u8fde\u63a5\uff08\u5f15\u811a\u987a\u5e8f\u548c01signal\u4e2d\u4ecb\u7ecd\u7684\u675c\u90a6\u7ebf\u5e8f\u5b8c\u5168\u4e00\u81f4\uff0c\u53ef\u4ee5\u5728\u4e0b\u5217\u9875\u9762\u7684\u9644\u4ef6\u4e2d\u627e\u5230\u8f6c\u63a5\u677f\u56fe\u7eb8 <a href=\"http:\/\/www.hellofpga.com\/index.php\/2024\/04\/20\/adb_zd02\/\">ADB_ZD02-\u6b63\u70b9\u539f\u5b50\u6a21\u5757\u8f6c\u63a5\u677f\uff08\u53ef\u8fde\u63a5\u6444\u50cf\u5934\u53caAD\u3001DA\u7b49\u6a21\u5757\uff09\u9644gerber\u6587\u4ef6\u53ef\u4ee5\u76f4\u63a5\u6253\u677f<\/a>\uff09\uff08\u7528\u8f6c\u63a5\u677f\u8fde\u63a5\u6444\u50cf\u5934 \u5982\u4e0b\u56fe\u6240\u793a\uff09<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"772\" height=\"567\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-10.png\" alt=\"\" class=\"wp-image-6709\" style=\"width:444px;height:auto\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-10.png 772w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-10-300x220.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-10-768x564.png 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u77ed\u675c\u90a6\u7ebf\u53ef\u7528\u4e8e\u8fde\u63a5\u6444\u50cf\u5934\u6a21\u5757\u548c Smart Zynq \u677f\u3002\u675c\u90a6\u7ebf\u957f\u5ea6\u5e94\u63a7\u5236\u572810 cm \u6216\u66f4\u77ed\u3002\u6700\u4f73\u957f\u5ea6\u662f 5 cm\u3002\u5982\u679c\u7ebf\u8f83\u957f\uff0c \u6570\u5b57\u4fe1\u53f7\u7684\u8d28\u91cf\u53ef\u80fd\u4f1a\u53d7\u5230\u4e32\u6270\u566a\u58f0\u7684\u5f71\u54cd\u3002 \u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u4e0a\u566a\u58f0\u8fc7\u5927\u4e5f\u4f1a\u5bfc\u81f4\u89c6\u9891\u56fe\u50cf\u8df3\u52a8\uff0c\u5e76\u51fa\u73b0\u7eff\u8272\u548c\u7d2b\u8272\u6761\u7eb9\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u7535\u7ebf\u957f\u5ea6\u4e3a 10 cm\uff0c\u5219\u53ef\u80fd\u9700\u8981\u66f4\u6539\u4e00\u4e2a\u5bc4\u5b58\u5668\u4ee5\u51cf\u5c11 OV7670\u7684I\/O\u9a71\u52a8\u5668\u7535\u6d41\u3002<a href=\"https:\/\/www.01signal.com\/zh\/xillinux\/ov7670-sccb-control\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u672c\u6559\u7a0b\u7684\u7b2c\u4e8c\u90e8\u5206<\/a>\u5c55\u793a\u4e86\u5982\u4f55\u8fdb\u884c\u6b64\u66f4\u6539\u3002<\/p>\n\n\n\n<p>\u8fd9\u662f OV7670 \u6a21\u5757\u8fde\u63a5\u5230 Smart Zynq SP \u677f\u7684\u56fe\u7247\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"532\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/ov7670-module-connected.jpg\" alt=\"\" class=\"wp-image-6441\" style=\"width:674px;height:auto\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/ov7670-module-connected.jpg 640w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/ov7670-module-connected-300x249.jpg 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4ece\u76f8\u53cd\u65b9\u5411\u62cd\u6444\u7684\u7167\u7247\u3002\u5de6\u4e0a\u65b9\u7684\u8f83\u5c0f\u56fe\u50cf\u5f3a\u8c03\u4e86\u5f15\u811a\u6392\u9488\u7684\u6700\u540e\u4e00\u4e2a\u5f15\u811a\u672a\u8fde\u63a5\u5230\u4efb\u4f55\u4e1c\u897f\u3002<strong>(\u8fd9\u91cc\u63a5\u7684\u662f\u6392\u9488\u7684\u7b2c\u4e8c\uff08 3.3V \uff09\u7b2c\u4e09\u4e2a\u5f15\u811a \uff08GND\uff09\uff0c\u8fd9\u91cc\u4e0d\u8981\u63a5\u9519 )<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.01signal.com\/img\/projects\/ov7670-module-connected-details.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" src=\"https:\/\/www.01signal.com\/img\/projects\/ov7670-module-connected-details.jpg\" alt=\"OV7670 module connected to the Smart Zynq board\"\/><\/a><\/figure>\n\n\n\n<p>\u4e0a\u56fe\u663e\u793a\u4e86\u5982\u4f55\u8fde\u63a5\u675c\u90a6\u7ebf\uff1a \u9996\u5148\uff0c\u67e5\u627e Smart Zynq \u677f\u80cc\u9762\u5199\u6709\u201cBank 33 VCCIO Vadj\u201d\u7684\u5730\u65b9\u3002\u5f15\u811a\u6392\u9488\u662f\u6211\u4eec\u8981\u4f7f\u7528\u7684\u5f15\u811a\u6392\u9488 \u3002\u8fd9\u662f\u9760\u8fd1 HDMI \u8fde\u63a5\u5668\u7684\u5f15\u811a\u6392\u9488\u3002<\/p>\n\n\n\n<p>\u76f8\u673a\u4f20\u611f\u5668\u548c Smart Zynq \u677f\u4e4b\u95f4\u5e76\u8054\u6709 16 \u6839\u7535\u7ebf\u3002\u53ea\u67093.3V\u548cGND\u8fde\u63a5\u5230\u5f15\u811a\u6392\u9488\u7684\u4e0d\u540c\u4f4d\u7f6e\u3002\u8fd9\u4e24\u6839\u7ebf\u4e0d\u5fc5\u5f88\u77ed\u3002<\/p>\n\n\n\n<p class=\"has-vivid-red-color has-text-color has-link-color wp-elements-c48fd9be6e0466de5bff88baf9c0e87e\"><strong>\u8bf7\u6ce8\u610f\uff0c\u5f15\u811a\u6392\u9488\u7684\u6700\u540e\u4e00\u4e2a\u5f15\u811a\u662f5V\uff0c\u4e0d\u8981\u8fde\u63a5\u7535\u7ebf\u5230\u8fd9\u4e2a\u5f15\u811a\u3002<\/strong><\/p>\n\n\n\n<p>\u8fd9\u662f\u76f8\u673a\u6a21\u5757\u548c Smart Zynq\u6392\u9488\u5f15\u811a\u53f7\u4e4b\u95f4\u7684\u5bf9\u5e94\u89c4\u5219\u3002\u8fd9\u4e9b\u4fe1\u606f\u4e5f\u53ef\u4ee5\u4ece\u4e0a\u56fe\u4e2d\u63a8\u65ad\u51fa\u6765\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table><tbody><tr><td><strong>Pin header<\/strong><\/td><td>1<\/td><td>3<\/td><td>5<\/td><td>7<\/td><td>9<\/td><td>11<\/td><td>13<\/td><td>15<\/td><td><strong>35<\/strong><\/td><\/tr><tr><td><strong>Module pin<\/strong><\/td><td>PWDN<\/td><td>D0<\/td><td>D2<\/td><td>D4<\/td><td>D6<\/td><td>MCLK<\/td><td>HS<\/td><td>SDA<\/td><td>GND<\/td><\/tr><tr><td colspan=\"10\"><\/td><\/tr><tr><td><strong>Module pin<\/strong><\/td><td>RST<\/td><td>D1<\/td><td>D3<\/td><td>D5<\/td><td>D7<\/td><td>PCLK<\/td><td>VS<\/td><td>SCL<\/td><td>3.3V<\/td><\/tr><tr><td><strong>Pin header<\/strong><\/td><td>2<\/td><td>4<\/td><td>6<\/td><td>8<\/td><td>10<\/td><td>12<\/td><td>14<\/td><td>16<\/td><td><strong>37<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u518d\u6b21\u5f3a\u8c03\uff0c\u8bf7\u7279\u522b\u6ce8\u610f 3.3V \u548c GND\u7684\u8fde\u63a5\u3002\u8fd9\u4e24\u6839\u7535\u7ebf\u7684\u9519\u8bef\u8fde\u63a5\u53ef\u80fd\u4f1a\u635f\u574f\u6444\u50cf\u5934\u6a21\u5757\u3002<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Frame grabbing \uff08\u622a\u53d6\u5e27\uff09<\/strong><\/h1>\n\n\n\n<p>\u4f7f\u7528\u57fa\u4e8e\u66f4\u65b0\u7684 xillydemo.v \u7684 bitstream \u6587\u4ef6\u542f\u52a8 Xillinux \uff08\u5982\u4e0a\u6240\u793a\uff09\u3002<\/p>\n\n\n\n<p>\u5728shell\u63d0\u793a\u7b26\u4e0b\uff0c\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u4ece\u6444\u50cf\u5934\u7684\u8f93\u51fa\u521b\u5efa\u4e00\u4e2a\u77ed\u89c6\u9891\u526a\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>cat \/dev\/xillybus_read_32 &gt; clip.raw<\/strong><\/pre>\n\n\n\n<p>\u6b64\u547d\u4ee4\u8fd0\u884c\u51e0\u79d2\u949f\uff0c\u7136\u540e\u505c\u6b62\u3002\u8fd9\u662f\u56e0\u4e3a\u89c6\u9891\u6d41\u7684\u6570\u636e\u901f\u7387\u9ad8\u4e8eSD\u5361\u7684\u5199\u5165\u6570\u636e\u901f\u5ea6\u3002\u8fd9\u4f1a\u5bfc\u81f4\u6ea2\u51fa\uff0c\u505c\u6b62\u6570\u636e\u6d41\u52a8\u3002\u672c\u6587\u540e\u9762\u5c06\u89e3\u91ca\u8fd9\u79cd\u884c\u4e3a\u80cc\u540e\u7684\u673a\u5236\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u64ad\u653e\u521a\u624d\u5f55\u5236\u7684\u89c6\u9891\u5185\u5bb9\uff1a\uff08\u5907\u6ce8\uff0c\u6b64\u5904\u9700\u8981\u767b\u5f55Xillinux\u7684\u56fe\u5f62\u684c\u9762\uff09<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>mplayer -demuxer rawvideo -rawvideo w=640:h=480:format=uyvy:size=614400:fps=31.25 clip.raw<\/strong><\/pre>\n\n\n\n<p>\u5982\u679c\u5728 Xillinux\u56fe\u5f62\u684c\u9762\u5185\u7684\u7ec8\u7aef\u7a97\u53e3\u4e2d\uff08terminal window\uff09 \u4e2d\u4f7f\u7528\u6b64\u547d\u4ee4\uff0c\u5219\u89c6\u9891\u5c06\u5728 Xillinux\u56fe\u5f62\u754c\u9762\u4e0a\u64ad\u653e\u3002<\/p>\n\n\n\n<p>\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4e4b\u524d\u63cf\u8ff0\u7684\u6280\u672f\uff08<a href=\"http:\/\/www.hellofpga.com\/index.php\/2023\/12\/24\/x-window\/\">Xillinux \u7ae0\u8282\u5341\u56db \u5728 Windows \u8ba1\u7b97\u673a\u4e0a\u8fdc\u7a0b\u663e\u793a\u5e76\u64cd\u4f5cXillinux \u684c\u9762\u53ca\u5e94\u7528<\/a>\uff09\u5728\u4e0d\u540c\u8ba1\u7b97\u673a\u7684\u5c4f\u5e55\u4e0a\u64ad\u653e\u89c6\u9891\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53e6\u4e00\u53f0\u8ba1\u7b97\u673a\u7684 IP address \u662f 192.168.1.11\uff0c\u8bf7\u66f4\u6539\u547d\u4ee4\uff0c\u4f7f\u5176\u5f00\u5934\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>DISPLAY=192.168.1.11:0 mplayer -demuxer rawvideo<\/strong><\/pre>\n\n\n\n<p>\u5982\u524d\u6587\u6240\u8ff0\uff0c\u89c6\u9891\u7684\u989c\u8272\u5e76\u4e0d\u6b63\u786e\uff0c<a href=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" data-type=\"link\" data-id=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\">\u4e0b\u4e00\u8282<\/a>\u5c06\u89e3\u91ca\u5982\u4f55\u7ea0\u6b63\u6b64\u95ee\u9898\u3002(\u5de6\u56fe\u4e3aOV7670\u91c7\u96c6\u5230\u7684\u753b\u9762\uff0c\u53f3\u8fb9\u4e3a\u5b9e\u9645\u5e94\u8be5\u663e\u793a\u7684\u989c\u8272)<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"422\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333-1024x422.png\" alt=\"\" class=\"wp-image-6644\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333-1024x422.png 1024w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333-300x124.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333-768x317.png 768w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333-1536x634.png 1536w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/1717245182333.png 1617w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>\u6b64\u547d\u4ee4\u5c06\u4e00\u4e2a\u89c6\u9891\u5e27\u8bfb\u5165\u540d\u4e3aframe.raw\u7684\u6587\u4ef6\u4e2d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>dd if=\/dev\/xillybus_read_32 of=frame.raw bs=614400 iflag=fullblock count=1<\/strong><\/pre>\n\n\n\n<p>\u539f\u59cb\u5e27\u7684\u683c\u5f0f\u662fUYVY 4:2:2\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u6bcf\u4e2a\u50cf\u7d20\u753116\u4f4d\u7ec4\u6210\u3002\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f\u7b2c\u4e00\u4e2a\u50cf\u7d20\u7684U\u5206\u91cf\uff08\u6216Cb\uff09\u3002\u63a5\u4e0b\u6765\u7684\u5b57\u8282\u662f\u76f8\u540c\u50cf\u7d20\u7684Y\u5206\u91cf\u3002\u7b2c\u4e09\u4e2a\u548c\u7b2c\u56db\u4e2a\u5b57\u8282\u662f\u7b2c\u4e8c\u4e2a\u50cf\u7d20\u7684V\u548cY\u5206\u91cf\uff08Cr\u548cY\uff09\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5c06\u6b64\u6587\u4ef6\u8f6c\u6362\u4e3aPNG\u6587\u4ef6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>convert -size 640x480 pal:frame.raw frame.png<\/strong><\/pre>\n\n\n\n<p>\u6709\u4e00\u4e2a\u7b80\u5355\u7684\u67e5\u770b\u56fe\u50cf\u7684\u5de5\u5177\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>display frame.png &amp;<\/strong><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Live view \u5b9e\u65f6\u89c6\u56fe\u663e\u793a<\/strong><\/h1>\n\n\n\n<p>\u4e3a\u4e86\u83b7\u53d6\u6444\u50cf\u5934\u7684\u5b9e\u65f6\u56fe\u50cf\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aliveview.sh\u7684\u6587\u4ef6\uff0c\u5176\u4e2d\u5305\u542b\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>#!\/bin\/bash\n\nwhile [ 1 ] ; do\n  dd if=\/dev\/xillybus_read_32 bs=614400 iflag=fullblock count=1 2&gt;\/dev\/null\ndone | mplayer -demuxer rawvideo -rawvideo w=640:h=480:format=uyvy:size=614400 -<\/strong><\/pre>\n\n\n\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fd0\u884c\u6b64\u811a\u672c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>bash liveview.sh<\/strong><\/pre>\n\n\n\n<p><strong>\u5907\u6ce8\uff1a \u8fd9\u91cc\u5982\u679c\u5728windows\u7684\u8bb0\u4e8b\u672c\u4e2d\u7f16\u8f91\uff0c\u7136\u540e\u518d\u4f20\u8f93\u5230xillinux\u677f\u5b50\u4e0a\uff0c\u4f1a\u9020\u6210bash \u8fd0\u884c\u65e0\u6cd5\u5de5\u4f5c\u7684\u60c5\u51b5\uff0c\u548cwindows \u7f16\u8f91\u7684\u6362\u884c\u7b26\u4e0e linux \u662f\u4e0d\u540c\u7684\u6709\u5173\u3002 \u6240\u4ee5liveview\u7684\u7f16\u8f91\u64cd\u4f5c\u8bf7\u52a1\u5fc5\u5728linux \u7cfb\u7edf\u4e0b\u5b8c\u6210\uff08\u4e5f\u53ef\u4ee5\u5728xillinux \u4e0b\u5b8c\u6210\uff0cvi \u6216\u8005xillinux \u7684\u56fe\u5f62\u6587\u672c\u7f16\u8f91\u5668\u4e5f\u53ef\u4ee5\uff0c\u76f4\u63a5\u4ecewindows \u590d\u5236\u518d\u7c98\u8d34\u4e5f\u4e0d\u884c\uff0c\u5c3d\u91cf\u624b\u6253\uff09\u3002\u4e3a\u4e86\u65b9\u4fbf\u5927\u5bb6\u64cd\u4f5c\uff0c\u8fd9\u91cc\u4e5f\u5c06\u6211\u7f16\u8f91\u597d\u7684liveview.sh\u8fdb\u884c\u4e0a\u4f20\uff0c\u5927\u5bb6\u53ef\u4ee5\u76f4\u63a5\u4e0b\u8f7d\u3002 <a href=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/liveview.rar\">liveview.sh<\/a>  <\/strong>(\u8bb0\u5f97\u89e3\u538b\u7f29)<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u811a\u672c\uff1f\u76f4\u63a5\u4ece\u8bbe\u5907\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u662f\u4e0d\u53ef\u80fd\u7684\uff0c\u56e0\u4e3a mplayer \u592a\u6162\u4e86\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c Zynq\u7684 ARM\u5904\u7406\u5668\u4e0d\u591f\u5f3a\u5927\uff0c\u65e0\u6cd5\u4ee5\u6b63\u786e\u7684\u5e27\u7387\uff0831.25 fps\uff09\u64ad\u653e\u89c6\u9891\u3002\u5982\u679c\u60a8\u5c1d\u8bd5\u8fd9\u6837\u505a\uff0c\u89c6\u9891\u53ea\u4f1a\u77ed\u6682\u64ad\u653e\u3002\u5f53 FPGA\u5185\u90e8\u6709\u53d1\u751f\u6ea2\u51fa\u65f6\uff0c\u6570\u636e\u6d41\u5c31\u4f1a\u505c\u6b62\u3002 <\/p>\n\n\n\n<p>\u6b64\u811a\u672c\u57fa\u4e8e\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\uff0c\u6bcf\u6b21\u4ece\/dev\/xillybus_read_32\u8bfb\u53d6\u4e00\u4e2a\u539f\u59cb\u5e27\u3002\u8fd9\u4e0e\u4e4b\u524d\u7528\u4e8e\u5c06\u4e00\u5e27\u8bfb\u5165 frame.raw\u7684\u547d\u4ee4\u76f8\u540c\u3002\u4f46\u8fd9\u4e00\u6b21\uff0c\u6ca1\u6709\u4e3a dd\u5b9a\u4e49\u8f93\u51fa\u6587\u4ef6\u3002\u56e0\u6b64\uff0c dd\u5c06\u6570\u636e\u5199\u5165\u6807\u51c6\u8f93\u51fa\u800c\u4e0d\u662f\u6587\u4ef6\u3002<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-492253a101a87caaa5bb02b7df453eb9\">\u8fd9\u4e2a\u6b7b\u5faa\u73af\u7684\u7ed3\u679c\u501f\u52a9\u4e00\u4e2a pipe \uff08\u901a\u9053\uff09\u91cd\u5b9a\u5411\u5230 mplayer\u7684\u6807\u51c6\u8f93\u5165\uff08\u6ce8\u610f\u5faa\u73af\u672b\u5c3e\u7684\u201c|\u201d\uff09\u3002 mplayer \u64ad\u653e\u4ece\u6807\u51c6\u8f93\u5165\u63a5\u6536\u7684\u89c6\u9891\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u811a\u672c\u89e3\u51b3\u4e86\u6570\u636e\u6ea2\u51fa\u7684\u95ee\u9898\uff0c\u56e0\u4e3a dd \u603b\u662f\u8bfb\u53d6\u5b8c\u6574\u7684\u89c6\u9891\u5e27\u3002\u5f53 mplayer \u6ca1\u6709\u51c6\u5907\u597d\u63a5\u6536\u66f4\u591a\u6570\u636e\u65f6\uff0c\u901a\u9053\uff08pipe\uff09\u4e0a\u7684\u6570\u636e\u6d41\u4f1a\u6682\u65f6\u505c\u6b62\u3002\u8fd9\u6837dd \u5c31\u4ece\u76f8\u673a\u4f20\u611f\u5668\u4e0a\u8df3\u8fc7\u4e86\u89c6\u9891\u5e27\u7684\u3002\u56e0\u6b64\uff0c\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u7684\u5e27\u7387\u4f1a\u4f4e\u4e8e\u6444\u50cf\u5934\u7684\u5e27\u7387\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u663e\u793a\u7684\u5e27\u901f\u7387\u662f mplayer \u80fd\u591f\u663e\u793a\u7684\u6700\u5927\u5e27\u901f\u7387\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e mplayer\u81ea\u5e26\u7f13\u51b2\u5bfc\u81f4\u5c4f\u5e55\u4e0a\u51fa\u73b0\u7684\u89c6\u9891\u56fe\u50cf\u7565\u6709\u5ef6\u8fdf\u3002\u4e3a\u4e86\u83b7\u5f97\u4f4e\u5ef6\u8fdf\uff0c\u9700\u8981\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\uff0c\u5728\u4e0d\u6dfb\u52a0\u7f13\u51b2\u7684\u60c5\u51b5\u4e0b\u5c06\u56fe\u50cf\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\u3002<\/p>\n\n\n\n<p><strong>\u4e0a\u8ff0\u547d\u4ee4\u9664\u4e86\u589e\u52a0\u5230\u811a\u672c\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5\u5728\u547d\u4ee4\u884c\u4e2d\u8f93\u5165\u5b8c\u6574\u7684\u547d\u4ee4\u8fd0\u884c\uff0c\u5982\u4e0b\u56fe\u6240\u793a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"291\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-2-1024x291.png\" alt=\"\" class=\"wp-image-6641\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-2-1024x291.png 1024w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-2-300x85.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-2-768x218.png 768w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-2.png 1209w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"523\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1-1024x523.png\" alt=\"\" class=\"wp-image-6640\" style=\"width:672px;height:auto\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1-1024x523.png 1024w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1-300x153.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1-768x392.png 768w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1-1536x785.png 1536w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-1.png 1881w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>mplayer\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u5a92\u4f53\u64ad\u653e\u5668\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e0d\u6b63\u786e\u7684\u989c\u8272\u5f88\u70e6\u4eba\uff0c\u53ef\u4ee5\u5c06\u89c6\u9891\u526a\u8f91\u64ad\u653e\u4e3a\u9ed1\u767d\u89c6\u9891\u3002\u5728\u547d\u4ee4\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u90e8\u5206\u4ee5\u5c06\u9971\u548c\u5ea6\u51cf\u5c11\u5230\u96f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>mplayer -saturation -100 -demuxer rawvideo<\/strong> ...<\/pre>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"963\" height=\"754\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-3.png\" alt=\"\" class=\"wp-image-6642\" style=\"width:414px;height:auto\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-3.png 963w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-3-300x235.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/06\/image-3-768x601.png 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>\u672c\u9875\u5b9e\u8df5\u90e8\u5206\u7ed3\u675f<\/strong><\/h1>\n\n\n\n<p>\u672c\u9875\u7684\u5176\u4f59\u90e8\u5206\u89e3\u91ca\u4e86\u6570\u636e\u91c7\u96c6\u90e8\u5206\u7684\u903b\u8f91\u7684\u5b9e\u73b0\u3002\u5982\u679c\u60a8\u53ea\u5bf9\u5b9e\u8df5\u90e8\u5206\u7684\u8bdd\u9898\u611f\u5174\u8da3\uff0c\u8bf7\u7ee7\u7eed\u9605\u8bfb<a href=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" data-type=\"link\" data-id=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u672c\u6559\u7a0b\u7684\u4e0b\u4e00\u90e8\u5206<\/a>\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>FPGA \u4e0e host\uff08\u4e3b\u673a\uff09\u4e4b\u95f4\u7684\u901a\u4fe1<\/strong><\/h1>\n\n\n\n<p>\u672c\u793a\u4f8b\u4e2d\u7684\u903b\u8f91\u57fa\u4e8e Xillybus IP\u6838\u3002\u8be5 IP\u6838\u8d1f\u8d23\u4e0e host\uff08\u4e3b\u673a\uff09\u7684\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u56de\u60f3\u4e00\u4e0b\u4e0a\u9762 Verilog \u4ee3\u7801\u4e2d\u88ab\u66ff\u6362\u7684\u90e8\u5206\u4ee5\u6b64\u7ed3\u5c3e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">  fifo_32x512 fifo_32\n     (\n      .clk(bus_clk),\n      .srst(!user_r_read_32_open),\n\n      .din(dataword),\n      .wr_en(fifo_wr_en),\n      .full(fifo_full),\n\n      .rd_en(user_r_read_32_rden),\n      .dout(user_r_read_32_data),\n      .empty(user_r_read_32_empty)\n      );\n\n<\/pre>\n\n\n\n<p>\u8fd9\u662f\u6807\u51c6 FIFO\u7684\u5b9e\u4f8b\u5316 \u3002\u8be5 FIFO \u6709 3 \u4e2a \u7aef\u53e3 \uff0c\u7528\u4e8e\u4ece FIFO\u8bfb\u53d6\u6570\u636e\uff1a rd_en\u3001 dout \u548c empty\u3002\u8fd9\u4e9b\u7aef\u53e3\u8fde\u63a5\u5230 Xillybus IP\u6838\u3002\u8fd9\u4f7f\u5f97 IP\u6838\u53ef\u4ee5\u4ece FIFO \u8bfb\u53d6\u6570\u636e\u5e76\u5c06\u8be5\u6570\u636e\u53d1\u9001\u5230 host\u4e3b\u673a\u3002\u7ed3\u679c\u662f\u5199\u5165 FIFO \u7684\u6240\u6709\u5185\u5bb9\u90fd\u5230\u8fbe\u540d\u4e3a \/dev\/xillybus_read_32\u7684\u8bbe\u5907\u6587\u4ef6 \u3002\u6362\u53e5\u8bdd\u8bf4\uff0c host\u4e3b\u673a\u4e0a\u7684\u666e\u901a\u8ba1\u7b97\u673a\u7a0b\u5e8f\u53ef\u4ee5\u5c06 \/dev\/xillybus_read_32 \u4f5c\u4e3a\u5e38\u89c4\u6587\u4ef6\u6253\u5f00\u3002\u5f53\u7a0b\u5e8f\u8bfb\u53d6\u8be5\u6587\u4ef6\u65f6\uff0c\u5b83\u4f1a\u63a5\u6536\u5230 FPGA\u5185\u90e8\u7684\u5e94\u7528\u903b\u8f91\u5df2\u5199\u5165 FIFO \u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p>FIFO \u6709 3 \u4e2a\u7528\u4e8e\u5199\u5165\u6570\u636e\u7684\u7aef\u53e3 \uff1a wr_en\u3001 din \u548c full\u3002\u8fd9\u4e9b\u7aef\u53e3\u8fde\u63a5\u5230\u4ece\u76f8\u673a\u4f20\u611f\u5668\u6536\u96c6\u50cf\u7d20\u6570\u636e\u7684\u903b\u8f91 \u3002\u672c\u9875\u7684\u4e0b\u4e00\u90e8\u5206\u89e3\u91ca\u4e86\u903b\u8f91\u7684\u5de5\u4f5c\u539f\u7406\u3002\u73b0\u5728\u6211\u53ea\u662f\u6307\u51fa\u903b\u8f91\u5728 @dataword \u548c @fifo_wr_en\u7684\u5e2e\u52a9\u4e0b\u5c06\u50cf\u7d20\u6570\u636e\u5199\u5165 FIFO \u3002\u4ece\u6b64\u65f6\u8d77\uff0c Xillybus IP \u6838\u7684\u4f5c\u7528\u5c31\u662f\u5c06\u8fd9\u4e9b\u6570\u636e\u4f20\u9001\u5230 host\u4e3b\u673a\u4e0a\u8fd0\u884c\u7684\u8ba1\u7b97\u673a\u7a0b\u5e8f\u79cd\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u8fd9\u4e2a\u547d\u4ee4\uff08\u5728\u4e0a\u9762\u5df2\u7ecf\u63d0\u5230\u8fc7\uff09\u80fd\u591f\u5c06\u8fd9\u4e9b\u6570\u636e\u5199\u5165\u6587\u4ef6\u7684\u539f\u56e0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>cat \/dev\/xillybus_read_32 &gt; clip.raw<\/strong><\/pre>\n\n\n\n<p>\u6709\u5173 FIFO \u5de5\u4f5c\u539f\u7406\u7684\u4e00\u822c\u8bf4\u660e\uff0c\u8bf7\u53c2\u9605<a href=\"https:\/\/www.01signal.com\/zh\/using-ip\/fpga-fifo\/introduction\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u6b64\u9875\u9762<\/a> <strong>\uff08\u6b64\u9875\u9762\u6765\u81ea01signal \u5b98\u65b9\u7f51\u7ad9\uff09<\/strong>\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6d41\u53ef\u4ee5\u7528\u4e0b\u56fe\u603b\u7ed3\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1002\" height=\"241\" src=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/image-1.png\" alt=\"\" class=\"wp-image-6454\" srcset=\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/image-1.png 1002w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/image-1-300x72.png 300w, http:\/\/www.hellofpga.com\/wp-content\/uploads\/2024\/04\/image-1-768x185.png 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>\u8be5\u7f51\u7ad9\u4e0a\u6709<a href=\"https:\/\/www.01signal.com\/zh\/xillybus\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u4e00\u4e2a\u5173\u4e8e Xillybus\u7684\u90e8\u5206<\/a>\uff0c\u8be5\u90e8\u5206\u6709<a href=\"https:\/\/www.01signal.com\/zh\/xillybus\/data-acquisition\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u4e00\u4e2a\u8ba8\u8bba data acquisition\uff08\u6570\u636e\u91c7\u96c6\uff09\u7684\u9875\u9762<\/a>\u3002\u901a\u8bfb\u8be5\u9875\u9762\u53ef\u80fd\u4f1a\u6709\u6240\u5e2e\u52a9<strong>\uff08\u6b64\u9875\u9762\u6765\u81ea01signal \u5b98\u65b9\u7f51\u7ad9\uff09<\/strong>\u3002<\/p>\n\n\n\n<p>\u8bf7\u6ce8\u610f\uff0c user_r_read_32_open \u8fde\u63a5\u5230 FIFO\u7684 srst\u7aef\u53e3\u3002\u5f53 \/dev\/xillybus_read_32 \u5728 host\u4e3b\u673a\u4e0a\u6253\u5f00\u65f6\uff0c\u8fd9\u4e2a\u4fe1\u53f7\u53d8\u4e3a\u9ad8\u7535\u5e73\u3002 \u8be5\u4fe1\u53f7\u4e0e\u4e00\u4e2a\u975e\u95e8\u8fde\u63a5\uff0c\u56e0\u6b64\u5f53\u8bbe\u5907\u6587\u4ef6\u5173\u95ed\u65f6\uff0c FIFO \u4fdd\u6301\u5728\u590d\u4f4d\u72b6\u6001\u3002\u8fd9\u53ef\u786e\u4fdd\u6bcf\u6b21\u5173\u95ed\u6587\u4ef6\u65f6\uff0c FIFO \u4e2d\u7684\u6240\u6709\u6570\u636e\u90fd\u4f1a\u88ab\u5220\u9664\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>\u4e0e\u76f8\u673a\u4f20\u611f\u5668\u7684\u63a5\u53e3<\/strong><\/h1>\n\n\n\n<p>\u73b0\u5728\u6211\u4eec\u6765\u770b\u770b\u4e0a\u9762 Verilog \u4ee3\u7801\u7684\u5f00\u5934\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">reg [1:0]  clkdiv;<br><br>   always @(posedge bus_clk)<br>     clkdiv &lt;= clkdiv + 1;<br><br>   assign J6[10] = clkdiv[1]; \/\/ MCLK \/ XCLK<\/pre>\n\n\n\n<p>@bus_clk\u7684\u9891\u7387\u662f 100 MHz\u3002\u8fd9\u4e2a clock \u5728 @clkdiv\u7684\u5e2e\u52a9\u5b9e\u73b0\u56db\u5206\u9891\u3002\u56e0\u6b64\uff0c\u76f8\u673a\u6a21\u5757\u63a5\u6536 25 MHz\u53c2\u8003\u65f6\u949f\u3002\u6839\u636e\u76f8\u673a\u7684\u6570\u636e\u624b\u518c\uff0c\u8fd9\u662f\u4e00\u4e2a\u5141\u8bb8\u7684\u9891\u7387\u3002\u6839\u636e\u624b\u518c\u4e0a\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u53c2\u8003\u65f6\u949f\u7684\u9891\u7387\u4e3a 24 MHz\u65f6\uff0cCMOS\u4ea7\u751f\u7684\u89c6\u9891\u6d41\u662f30fps\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u572825M\u9891\u7387\u4e0b\u5b9e\u9645\u751f\u6210\u7684\u89c6\u9891\u5e27\u901f\u7387\u4f1a\u7565\u9ad8\u4e8e24M\u4e0b\u768430fps\uff0c\u5b9e\u9645\u662f 31.25 fps\u3002<\/p>\n\n\n\n<p>\u8fd9\u91cc\u5e94\u8be5\u6307\u51fa,\u901a\u5e38\u8fd9\u79cd\u65b9\u6cd5\u521b\u5efa\u65f6\u949f\u662f\u4e0d\u6b63\u786e\u7684\u3002\u6b63\u786e\u7684\u521b\u5efa\u65f6\u949f\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 PLL \u6216\u7c7b\u4f3c\u7684\u8d44\u6e90\u3002\u5728\u8fd9\u79cd\u7279\u5b9a\u60c5\u51b5\u4e0b\u8be5\u65b9\u6cd5\u6ca1\u6709\u95ee\u9898,\u56e0\u4e3a @clkdiv \u4ec5\u7528\u4e8e\u521b\u5efa\u8f93\u51fa\u4fe1\u53f7: FPGA\u7684\u903b\u8f91\u4e0d\u4f7f\u7528\u8be5\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>Verilog \u4ee3\u7801\u7684\u4e0b\u4e00\u90e8\u5206\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>assign<\/strong> J6[0] = 0; <em>\/\/ PWDN, the camera is always on<\/em>\n   <strong>assign<\/strong> J6[1] = !user_w_write_32_open; <em>\/\/ RESET#, active low<\/em><\/pre>\n\n\n\n<p>J6[0] \u8fde\u63a5\u5230\u6444\u50cf\u5934\u6a21\u5757\u7684 PWDN \u5f15\u811a\u3002\u76f8\u673a\u6c38\u8fdc\u4e0d\u4f1a\u65ad\u7535\u3002<\/p>\n\n\n\n<p>J6[1] \u8fde\u63a5\u5230\u76f8\u673a\u7684 RESET\u5f15\u811a\u3002\u5f53\u8fd9\u4e2a\u5f15\u811a\u4e3a\u4f4e\u7535\u5e73\u65f6\uff0c\u76f8\u673a\u88ab\u590d\u4f4d\u3002\u5f53 host\u4e0a\u7684\u7a0b\u5e8f\u6253\u5f00 \/dev\/xillybus_write_32 \u65f6\uff0c @user_w_write_32_open \u4e3a\u9ad8\u7535\u5e73\u3002\u6240\u4ee5\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u76f8\u673a\u4e0d\u4f1a\u590d\u4f4d\uff0c\u56e0\u4e3a @user_w_write_32_open \u4e3a\u4f4e\u7535\u5e73\uff0c\u56e0\u6b64 J6[1] \u4e3a\u9ad8\u7535\u5e73\u3002\u8fd9\u79cd\u5b89\u6392\u5141\u8bb8\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5bf9\u76f8\u673a\u8fdb\u884c\u590d\u4f4d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>echo 1 &gt; \/dev\/xillybus_write_32<\/strong><\/pre>\n\n\n\n<p>\u8be5\u547d\u4ee4\u4f1a\u77ed\u6682\u6253\u5f00 device file \uff0c\u4ece\u800c\u8fbe\u5230\u9884\u671f\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u672c\u6587\u5df2\u7ecf\u5c55\u793a\u4e86\u4ece FPGA \u5230\u76f8\u673a\u4f20\u611f\u5668\u7684\u4fe1\u53f7\u662f\u5982\u4f55\u751f\u6210\u7684\u3002\u73b0\u5728\u4ecb\u7ecd\u4ece\u76f8\u673a\u4f20\u611f\u5668\u5230 FPGA\u7684\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>OV7670 \u4ece FPGA\u751f\u6210\u4e0e reference clock\uff08\u53c2\u8003\u65f6\u949f\uff09\u9891\u7387\u76f8\u540c\u7684 pixel clock\uff08\u50cf\u7d20\u65f6\u949f\uff09 \u3002\u4e5f\u5c31\u662f\u8bf4\uff0c PCLK\u7684\u9891\u7387\u5c31\u662f 25 MHz\u3002\u8be5\u4fe1\u53f7\u8fde\u63a5\u5230 Verilog \u4ee3\u7801\u4e2d\u7684 @pclk_in \u3002<\/p>\n\n\n\n<p>\u76f8\u673a\u4f20\u611f\u5668\u8fd8\u751f\u6210\u5305\u542b\u89c6\u9891\u6570\u636e\u7684\u4e09\u4e2a\u4fe1\u53f7\u3002 Verilog \u4ee3\u7801\u4e2d\u8fd9\u4e9b\u4fe1\u53f7\u7684\u540d\u79f0\u662f @D_in \u3001 @hsync_in \u548c @vsync_in\u3002\u5f53 @pclk_in\u4fe1\u53f7\u4ece\u9ad8\u53d8\u4e3a\u4f4e\u65f6 (\u4e0b\u964d\u6cbf) \uff0c\u76f8\u673a\u4f20\u611f\u5668\u4f1a\u540c\u65f6\u66f4\u6539\u8fd9\u4e9b\u4fe1\u53f7\u7684\u503c\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c @D_in \u3001 @hsync_in \u548c @vsync_in \u7684\u53d8\u5316\u4e0e @pclk_in\u7684 \u4e0b\u964d\u6cbf\u4fdd\u6301\u4e00\u81f4\u3002\u4ece FPGA\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u88ab\u79f0\u4e3a source synchronous input\uff08\u6e90\u540c\u6b65\u8f93\u5165\uff09\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u770bVerilog\u4ee3\u7801\u4e2d\u76f8\u5173\u7684\u90e8\u5206\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">   <strong>wire<\/strong> [7:0] D_in;\n   <strong>wire<\/strong>       pclk_in, hsync_in, vsync_in;\n\n   <strong>assign<\/strong> D_in = J6[9:2];\n   <strong>assign<\/strong> pclk_in = J6[11];\n   <strong>assign<\/strong> hsync_in = J6[12];\n   <strong>assign<\/strong> vsync_in = J6[13];\n\n   (* IOB = \"TRUE\" *) <strong>reg<\/strong> [7:0] D_guard;\n   (* IOB = \"TRUE\" *) <strong>reg<\/strong>       pclk_guard, hsync_guard, vsync_guard;\n\n   <strong>reg<\/strong> [7:0]  D;\n   <strong>reg<\/strong> \t      pclk, hsync, vsync;\n\n   <strong>always<\/strong> @(<strong>posedge<\/strong> bus_clk)\n     <strong>begin<\/strong>\n\t<em>\/\/ Metastability guards on asynchronous inputs<\/em>\n\tD_guard &lt;= D_in;\n\tpclk_guard &lt;= pclk_in;\n\thsync_guard &lt;= hsync_in;\n\tvsync_guard &lt;= vsync_in;\n\n\tD &lt;= D_guard;\n\tpclk &lt;= pclk_guard;\n\thsync &lt;= hsync_guard;\n\tvsync &lt;= vsync_guard;\n     <strong>end<\/strong><\/pre>\n\n\n\n<p>\u8bf7\u6ce8\u610f\uff0c\u6765\u81ea\u76f8\u673a\u4f20\u611f\u5668\u7684\u6240\u6709\u4fe1\u53f7\u90fd\u662f\u501f\u52a9\u4e8e @bus_clk\u8fdb\u884c\u91c7\u6837\u7684\u3002\u751a\u81f3\u76f8\u673a\u7684 PCLK \u4e5f\u4ee5\u4e0e\u5176\u4ed6\u4fe1\u53f7\u76f8\u540c\u7684\u65b9\u5f0f\u8fdb\u884c\u91c7\u6837\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c PCLK \u4e0d\u88ab\u89c6\u4e3a\u65f6\u949f\uff0c\u800c\u662f\u88ab\u89c6\u4e3a\u6570\u636e\u4fe1\u53f7\u5904\u7406\u3002\u4e0b\u9762\u6211\u5c06\u7b80\u8981\u89e3\u91ca\u8be5\u6280\u672f\u3002<\/p>\n\n\n\n<p>\u53e6\u8bf7\u6ce8\u610f, @bus_clk \u548c\u76f8\u673a\u4f20\u611f\u5668\u4fe1\u53f7\u4e4b\u95f4\u7684\u65f6\u5e8f\u5173\u7cfb\u662f\u672a\u77e5\u7684\u3002\u56e0\u6b64,\u63a5\u6536\u8fd9\u4e9b\u4fe1\u53f7\u7684\u89e6\u53d1\u5668\u7684\u8f93\u51fa\u5e76\u4e0d\u53ef\u9760: \u65e0\u6cd5\u786e\u4fdd\u8fd9\u4e9b\u89e6\u53d1\u5668\u7684\u65f6\u5e8f\u8981\u6c42 \uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u80fd\u4f1a\u5728\u77ed\u65f6\u95f4\u5185\u53d8\u5f97\u4e0d\u7a33\u5b9a\u3002\u8fd9\u662f\u4e0e\u8de8\u65f6\u949f\u57df\u76f8\u5173\u7684\u5df2\u77e5\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u8be5\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\u5728<a href=\"https:\/\/www.01signal.com\/zh\/verilog-design\/clockdomains\/crossing-basics\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u5355\u72ec\u7684\u9875\u9762<\/a><strong>\uff08\u8be5\u9875\u9762\u6765\u81ea01signal\uff09<\/strong>\u4e0a\u8ba8\u8bba\uff1a Metastability guards\u3002\u8fd9\u610f\u5473\u7740\u6709\u4e24\u4e2a\u89e6\u53d1\u5668\u76f8\u4e92\u4e32\u8054\u3002\u7b2c\u4e00\u4e2a\u89e6\u53d1\u5668\uff08\u4f8b\u5982@pclk_guard\uff09\u8fde\u63a5\u5230\u5916\u90e8\u4fe1\u53f7\u3002\u7b2c\u4e8c\u4e2a\u89e6\u53d1\u5668\u8fde\u63a5\u5230\u7b2c\u4e00\u4e2a\u89e6\u53d1\u5668\u3002\u56e0\u6b64\uff0c\u5373\u4f7f\u7b2c\u4e00\u4e2a\u89e6\u53d1\u5668\u51fa\u73b0\u77ed\u6682\u4e0d\u7a33\u5b9a\uff0c\u7b2c\u4e8c\u4e2a\u89e6\u53d1\u5668\u7684\u65f6\u5e8f\u8981\u6c42\u4e5f\u80fd\u5f97\u5230\u4fdd\u8bc1\u3002\u56e0\u6b64\u7b2c\u4e8c\u4e2a\u89e6\u53d1\u5668\u7684\u8f93\u51fa\u662f\u53ef\u9760\u7684\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\u6240\u8ff0\uff1a @D\u3001 @pclk\u3001 @hsync \u548c @vsync \u662f\u53ef\u9760\u7684\u5bc4\u5b58\u5668 \uff08\u4e0e @bus_clk\u540c\u6b65\uff09\u3002<\/p>\n\n\n\n<p>\u56de\u60f3\u4e00\u4e0b\uff0c @bus_clk\u7684\u9891\u7387\u662f 100 MHz\u3002\u53e6\u4e00\u65b9\u9762\uff0c PCLK\u7684\u9891\u7387\u662f 25 MHz\u3002\u56e0\u6b64\uff0c\u6bcf\u56db\u4e2a \u65f6\u949f\u5faa\u73af\u4e2d\uff0c @D\u3001 @hsync \u548c @vsync \u7684\u503c\u5e94\u4ec5\u6d88\u8017\u4e00\u6b21\u3002\u4f46\u8fd9\u56db\u4e2a clock cycle \u4e2d\u7684\u54ea\u4e00\u4e2a\u5462\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u5728 Verilog \u4ee3\u7801\u7684\u8fd9\u4e9b\u884c\u4e2d\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>wire<\/strong>       sample_valid;\n   <strong>reg<\/strong> \t      previous_pclk;\n\n   <strong>always<\/strong> @(<strong>posedge<\/strong> bus_clk)\n     previous_pclk &lt;= pclk;\n\n   <strong>assign<\/strong> sample_valid = pclk &amp;&amp; !previous_pclk;<\/pre>\n\n\n\n<p>\u8fd9\u6bb5\u4ee3\u7801\u7684\u610f\u601d\u5f88\u7b80\u5355\uff1a \u5982\u679c\u5f53\u524d @pclk \u4e3a\u9ad8\u7535\u5e73\uff0c\u5e76\u4e14\u4e0a\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u5b83\u662f\u4f4e\u7535\u5e73\uff0c\u5219\u4f7f\u7528 @D\u3001@hsync \u548c @vsync \u7684\u6570\u503c\u3002\u56de\u60f3\u4e00\u4e0b\uff0c\u5f53\u76f8\u673a\u7684 PCLK \u4ece\u9ad8\u53d8\u4e3a\u4f4e\u65f6\uff0c\u76f8\u673a\u4f20\u611f\u5668\u7684\u4fe1\u53f7\u4f1a\u6539\u53d8\u5176\u503c\u3002\u6240\u4ee5\u5f53 PCLK \u4ece\u4f4e\u7535\u5e73\u5230\u9ad8\u7535\u5e73\u53d8\u5316\u65f6\uff0c\u5176\u4ed6\u4fe1\u53f7\u90fd\u662f\u7a33\u5b9a\u7684\u3002<\/p>\n\n\n\n<p>\u4f46 @pclk\u3001 @D\u3001 @hsync \u548c @vsync \u90fd\u662f\u5bc4\u5b58\u5668\u3002\u8fd9\u4e9b\u5bc4\u5b58\u5668\u4e0e @bus_clk\u540c\u6b65\uff0c\u5b83\u4eec\u4ee3\u8868\u7279\u5b9a\u65f6\u95f4\u76f8\u673a\u4f20\u611f\u5668\u4fe1\u53f7\u7684\u5feb\u7167\u3002 \u903b\u8f91\u4e0d\u662f\u76f4\u63a5\u68c0\u6d4b PCLK \u672c\u8eab\u7684\u4e0a\u5347\u6cbf \uff0c\u800c\u662f\u5bf9 @pclk\u6267\u884c\u7c7b\u4f3c\u7684\u64cd\u4f5c\uff1a \u5f53 @pclk \u7684\u503c\u7531\u4f4e\u53d8\u9ad8\u65f6\uff0c\u5c31\u662f\u91c7\u6837\u5176\u4ed6\u5bc4\u5b58\u5668\u6570\u503c\u7684\u6b63\u786e\u65f6\u673a\u3002<\/p>\n\n\n\n<p>\u8be5\u6280\u672f\u79f0\u4e3a 01-signal sampling\u3002\u8be5\u6280\u672f\u80cc\u540e\u7684\u60f3\u6cd5\u5728<a href=\"https:\/\/www.01signal.com\/zh\/electronics\/01-signal-sampling\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u6709\u5173 01-signal sampling\u7684\u5355\u72ec\u9875\u9762<\/a><strong>\uff08\u9875\u9762\u6765\u81ea01signal\uff09<\/strong>\u4e0a\u8fdb\u884c\u4e86\u8be6\u7ec6\u89e3\u91ca\u3002\u8be5\u9875\u9762\u8fd8\u89e3\u91ca\u4e86\u6b64\u65b9\u6cd5\u5982\u4f55\u4fdd\u8bc1 FPGA\u7684\u65f6\u5e8f\u8981\u6c42\u3002\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u903b\u8f91\u53ef\u786e\u4fdd @D\u3001 @hsync \u548c @vsync \u4e2d\u7684\u503c\u6b63\u786e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u542f\u52a8\u548c\u505c\u6b62\u6570\u636e\u6d41<\/strong><\/h2>\n\n\n\n<p>\u73b0\u5728\u6211\u4eec\u6765\u770b\u770b\u4e24\u4e2a\u5bc4\u5b58\u5668 \uff0c\u5b83\u4eec\u65e8\u5728\u963b\u6b62\u5411 host\u4f20\u8f93\u6570\u636e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>@wait_for_frame\uff1a \u8fd9\u4e2a\u5bc4\u5b58\u5668\u7684\u76ee\u7684\u662f\u4fdd\u8bc1\u8bbe\u5907\u6587\u4ef6 \uff08device file\uff09 \u4e2d\u7684\u6570\u636e\u662f\u4ece\u5e27\u5934\u7684\u5f00\u5934\u5f00\u59cb\u7684\u3002<\/li>\n\n\n\n<li>@fifo_has_been_full\uff1a \u8be5\u5bc4\u5b58\u5668\u662f\u786e\u4fdd\u5728 FIFO \u53d8\u6ee1\u65f6\u505c\u6b62\u6570\u636e\u6d41\u7684\u673a\u5236\u7684\u4e00\u90e8\u5206\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6211\u73b0\u5728\u5c06\u8be6\u7ec6\u8ba8\u8bba\u8fd9\u4e24\u4e2a\u5bc4\u5b58\u5668\u3002\u4e00\u3001 @wait_for_frame\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">  <strong>reg<\/strong> \t      wait_for_frame;\n\n   <strong>always<\/strong> @(<strong>posedge<\/strong> bus_clk)\n     <strong>if<\/strong> (!user_r_read_32_open)\n       wait_for_frame &lt;= 1;\n     <strong>else<\/strong> <strong>if<\/strong> (sample_valid &amp;&amp; vsync)\n       wait_for_frame &lt;= 0;<\/pre>\n\n\n\n<p>\u5f53\u8bbe\u5907\u6587\u4ef6\uff08device file\uff09 \u672a\u6253\u5f00\u65f6\uff0c@wait_for_frame\u7684\u503c\u4e3a\u9ad8\u7535\u5e73\u3002\u5f53\u76f8\u673a\u4f20\u611f\u5668\u7684 vsync \u4fe1\u53f7\u54cd\u5e94\u65f6\uff0c\u8be5\u5bc4\u5b58\u5668\u7684\u503c\u4f1a\u53d8\u4e3a\u4f4e\u7535\u5e73\u3002\u8be5\u4fe1\u53f7\u5728\u5e27\u4e0e\u5e27\u4e4b\u95f4\u7684\u65f6\u95f4\u6bb5\u5185\u4e3a\u9ad8\u7535\u5e73\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f53 @vsync \u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c\u76f8\u673a\u4e0d\u4f20\u8f93\u4efb\u4f55\u50cf\u7d20\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u5f53\u5ffd\u7565\u76f8\u673a\u7684\u50cf\u7d20\u6570\u636e\u65f6\uff0c @wait_for_frame \u4e3a\u9ad8\u4ee3\u8868\uff1a \u5f53\u524d\u8bbe\u5907\u6587\u4ef6\u5904\u4e8e\u5173\u95ed\u72b6\u6001\uff0c\u6216\u8005\u8bbe\u5907\u6587\u4ef6\u662f\u6253\u5f00\u72b6\u6001\uff0c\u4f46\u76f8\u673a\u6b63\u5904\u4e8e\u5e27\u4e0e\u5e27\u4e4b\u95f4\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u6211\u5c06\u7ee7\u7eed\u89e3\u91ca @fifo_has_been_full\uff1a \u786e\u4fdd\u5230\u8fbe host \u7684\u6570\u636e\u4e0e\u76f8\u673a\u4f20\u611f\u5668\u4ea7\u751f\u7684\u6570\u636e\u76f8\u540c\u975e\u5e38\u91cd\u8981\u3002\u4f46\u662f\uff0c\u5982\u679c\u8ba1\u7b97\u673a\u7a0b\u5e8f\u6ca1\u6709\u8db3\u591f\u5feb\u5730\u4ece\u8bbe\u5907\u6587\u4ef6\uff08device file\uff09\u8bfb\u53d6\u6570\u636e\uff0c\u5219 FIFO \u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u6570\u636e\u6ea2\u51fa \uff1a DMA\u7f13\u51b2\u5668\u6700\u7ec8\u4f1a\u53d8\u6ee1\uff0c\u56e0\u6b64\u5c06\u6ca1\u6709\u5730\u65b9\u53ef\u4ee5\u590d\u5236 FIFO \u7684\u5185\u5bb9\u3002\u56e0\u6b64\uff0c Xillybus IP\u6838\u5c06\u65e0\u6cd5\u4ece FIFO\u8bfb\u53d6\u6570\u636e\u3002\u5f53\u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u65f6\uff0c FIFO \u5c31\u4f1a\u53d8\u6ee1\uff0c\u4ece\u800c\u65e0\u6cd5\u5411\u5176\u5199\u5165\u65b0\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u8fd8\u6709\u903b\u8f91\u4e5f\u65e0\u6cd5\u963b\u6b62\u8fd9\u79cd\u60c5\u51b5\u3002\u7136\u800c\uff0c\u903b\u8f91\u53ef\u4ee5\u4fdd\u8bc1\u5230\u8fbe host \u7684\u6570\u636e\u662f\u8fde\u7eed\u7684\uff1a \u5982\u679c FIFO \u5df2\u6ee1\uff0c\u903b\u8f91\u5c06\u505c\u6b62\u5411 FIFO\u5199\u5165\u6570\u636e\u3002\u53e6\u5916\uff0c\u5f53 FIFO \u5df2\u6ee1\u540e FIFO \u53d8\u7a7a\u65f6\uff0c\u903b\u8f91\u8bf7\u6c42\u5411 host\u53d1\u9001 EOF\u4fe1\u53f7 \u3002\u56e0\u6b64\uff0c\u8ba1\u7b97\u673a\u7a0b\u5e8f\u63a5\u6536\u5728 FIFO \u53d8\u6ee1\u4e4b\u524d\u5199\u5165 FIFO \u7684\u6240\u6709\u6570\u636e\u3002\u5728\u8fd9\u4e9b\u6570\u636e\u4e4b\u540e\uff0c\u8ba1\u7b97\u673a\u6536\u5230 EOF\u3002\u8fd9\u4e0e\u5230\u8fbe\u5e38\u89c4\u6587\u4ef6\u672b\u5c3e\u65f6\u53d1\u751f\u7684\u60c5\u51b5\u76f8\u540c\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u673a\u5236\u786e\u4fdd\u8ba1\u7b97\u673a\u7a0b\u5e8f\u53ef\u4ee5\u76f8\u4fe1\u5230\u8fbe\u7684\u6570\u636e\u662f\u6b63\u786e\u4e14\u8fde\u7eed\u7684\u3002\u5982\u679c\u8fde\u7eed\u6027\u4e22\u5931\uff0c EOF \u4f1a\u5f3a\u5236\u8ba1\u7b97\u673a\u7a0b\u5e8f\u5173\u95ed\u8bbe\u5907\u6587\u4ef6\uff08 device file\uff09\u3002\u5982\u679c\u7a0b\u5e8f\u518d\u6b21\u6253\u5f00\u8bbe\u5907\u6587\u4ef6 \uff0c\u6570\u636e\u5c06\u4ece\u65b0\u7684\u5e27\u5f00\u59cb\uff0c\u8fd9\u8981\u5f52\u529f\u4e8e @wait_for_frame\u3002<\/p>\n\n\n\n<p>\u8fd9\u662f Verilog \u4ee3\u7801\u4e2d\u76f8\u5173\u90e8\u5206\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>reg<\/strong> \t      fifo_has_been_nonfull, fifo_has_been_full;\n   <strong>wire<\/strong>       fifo_full;\n\n   <strong>always<\/strong> @(<strong>posedge<\/strong> bus_clk)\n     <strong>begin<\/strong>\n\t<strong>if<\/strong> (!fifo_full)\n\t  fifo_has_been_nonfull &lt;= 1;\n\t<strong>else<\/strong> <strong>if<\/strong> (!user_r_read_32_open)\n\t  fifo_has_been_nonfull &lt;= 0;\n\n\t<strong>if<\/strong> (fifo_full &amp;&amp; fifo_has_been_nonfull)\n\t  fifo_has_been_full &lt;= 1;\n\t<strong>else<\/strong> <strong>if<\/strong> (!user_r_read_32_open)\n\t  fifo_has_been_full &lt;= 0;\n     <strong>end<\/strong>\n\n   <strong>assign<\/strong> user_r_read_32_eof = fifo_has_been_full &amp;&amp; user_r_read_32_empty;<\/pre>\n\n\n\n<p>\u5f53 FIFO \u5df2\u6ee1\u65f6\uff0c@fifo_has_been_full \u4e3a\u9ad8\u7535\u5e73\u3002\u5f53 \u8bbe\u5907\u6587\u4ef6\u672a\u6253\u5f00\u65f6\uff0c\u8be5\u5bc4\u5b58\u5668\u53d8\u4e3a\u4f4e\u7535\u5e73\u3002\u5f53 @fifo_full \u548c @fifo_has_been_nonfull \u90fd\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c @fifo_has_been_full \u53d8\u4e3a\u9ad8\u7535\u5e73\u3002<\/p>\n\n\n\n<p>@fifo_full \u8fde\u63a5\u5230 FIFO\u7684 &#8220;full&#8221; port\u3002\u4f46\u4e3a\u4ec0\u4e48\u9700\u8981 @fifo_has_been_nonfull \uff1f\u539f\u56e0\u662f\uff0c\u53ea\u8981 FIFO \u4fdd\u6301\u5728\u590d\u4f4d\u72b6\u6001\u65f6\uff0c FIFO \u5f80\u5f80\u4f1a\u4fdd\u6301\u201cfull\u201d\u4fe1\u53f7\u4e3a\u9ad8\u7535\u5e73\u3002\u8be5\u529f\u80fd\u7684\u76ee\u7684\u662f\u544a\u8bc9\u5e94\u7528\u903b\u8f91  \uff0cFIFO \u5c1a\u672a\u51c6\u5907\u597d\u63a5\u6536\u6570\u636e\u3002 @fifo_has_been_nonfull \u7684\u76ee\u7684\u662f\u9632\u6b62 @fifo_has_been_full \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u9519\u8bef\u5730\u53d8\u9ad8\u3002<\/p>\n\n\n\n<p>\u5f53 @fifo_has_been_full \u548c @user_r_read_32_empty \u90fd\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c@user_r_read_32_eof \u53d8\u4e3a\u9ad8\u7535\u5e73\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f53 FIFO \u8fc7\u53bb\u5df2\u6ee1\u3001\u73b0\u5728\u4e3a\u7a7a\u65f6\uff0c\u4f1a\u5411\u4e3b\u673a\u53d1\u9001EOF\u4fe1\u53f7\u3002\u8bf7\u6ce8\u610f\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u65e0\u8bba\u5982\u4f55\u90fd\u4e0d\u4f1a\u5411 FIFO \u5199\u5165\u65b0\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u6709\u4e00\u4e2a<a href=\"https:\/\/www.01signal.com\/zh\/using-ip\/fpga-fifo\/fifo-data-acquisition\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u5355\u72ec\u7684\u9875\u9762<\/a><strong>\uff08\u9875\u9762\u6765\u81ea01signal\uff09<\/strong>\u8ba8\u8bba\u4e86\u786e\u4fdd\u6570\u636e\u8fde\u7eed\u6027\u7684\u7c7b\u4f3c\u89e3\u51b3\u65b9\u6848\u3002\u5f53 FIFO \u7684\u4e24\u4fa7\u5c5e\u4e8e\u4e0d\u540c\u7684\u65f6\u949f\u57df\u65f6\uff0c\u9700\u8981\u7528\u5230\u8be5\u9875\u9762\u4e0a\u63d0\u4f9b\u7684\u89e3\u51b3\u65b9\u6848\u3002\u5728\u672c\u9875\u63d0\u4f9b\u7684\u4ee3\u7801\u4e2d\uff0c FIFO \u4ec5\u4e0e\u4e00\u4e2a\u65f6\u949f\u540c\u6b65\u3002\u56e0\u6b64\uff0c\u672c\u9875\u4e2d @fifo_has_been_full \u7684\u5b9e\u73b0\u66f4\u52a0\u7b80\u5355\u3002\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5199\u5165\u6570\u636e\u5230 FIFO <\/strong><\/h2>\n\n\n\n<p>\u5c06\u56fe\u50cf\u50cf\u7d20\u6570\u636e\u5199\u5165FIFO\u7684VERILOG\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">reg \t      fifo_wr_en;\n   reg [1:0]  byte_position;\n   reg [31:0] dataword;\n\n   <strong>always<\/strong> @(<strong>posedge<\/strong> bus_clk)\n     <strong>if<\/strong> (wait_for_frame)\n       <strong>begin<\/strong>\n\t  byte_position &lt;= 0;\n\t  fifo_wr_en &lt;= 0;\n       <strong>end<\/strong>\n     <strong>else<\/strong> <strong>if<\/strong> (sample_valid &amp;&amp; hsync)\n       <strong>begin<\/strong>\n\t  <strong>case<\/strong> (byte_position)\n\t    0: dataword[7:0] &lt;= D;\n\t    1: dataword[15:8] &lt;= D;\n\t    2: dataword[23:16] &lt;= D;\n\t    3: dataword[31:24] &lt;= D;\n\t  <strong>endcase<\/strong>\n\n\t  <strong>if<\/strong> (byte_position == 3)\n\t    fifo_wr_en &lt;= !fifo_has_been_full;\n\t  <strong>else<\/strong>\n\t    fifo_wr_en &lt;= 0;\n\n\t  byte_position &lt;= byte_position + 1;\n       <strong>end<\/strong>\n     <strong>else<\/strong>\n       fifo_wr_en &lt;= 0;<\/pre>\n\n\n\n<p>\u6765\u81ea\u76f8\u673a\u4f20\u611f\u5668\u7684\u50cf\u7d20\u6570\u636e\u4f5c\u4e3a 8 \u4f4d\u5bbd\u7684\u6570\u636e\u5143\u7d20\u5230\u8fbe\u3002 \u8fd9\u90e8\u5206\u903b\u8f91\u5c06\u8fd9\u4e9b\u6570\u636e\u5143\u7d20\u91cd\u65b0\u7ec4\u7ec7\u621032\u4f4d\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u5c06\u6570\u636e\u5199\u5165 FIFO\u3002 \u8fd9\u91cc\u4e0d\u4f7f\u75288\u4f4d\u7684 Xillybus\u6570\u636e\u6d41(\/dev\/xillybus_write_8)\u53bb\u4f20\u8f93\u5185\u5bb9\u662f\u56e0\u4e3a\u4e0b\u9762\u4e24\u4e2a\u539f\u56e0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u4e8e\u6570\u636e\u91c7\u96c6\u7684\u5e94\u7528\uff0c 32-bit\u6570\u636e\u6d41\u66f4\u5408\u9002\u3002\u5f53\u6570\u636e\u5b57\u5bbd\u5ea6\u4ec5\u4e3a8\/16\u4f4d\u65f6\uff0cXillybus IP\u6838\u5728\u4f20\u8f93\u6570\u636e\u65f6\u6548\u7387\u4e0d\u9ad8\u3002<\/li>\n\n\n\n<li>\/dev\/xillybus_write_8 \u5df2\u88ab\u7528\u4e8e I<sup>2<\/sup>C \u4e0e\u76f8\u673a\u4f20\u611f\u5668\u7684\u901a\u4fe1\uff0c\u5982<a href=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" data-type=\"link\" data-id=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u672c\u6559\u7a0b\u7684\u4e0b\u4e00\u90e8\u5206<\/a>\u6240\u8ff0\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5f53 @wait_for_frame \u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c\u7531\u4e8e\u4ee5\u4e0b\u4e24\u79cd\u53ef\u80fd\u6027\u4e4b\u4e00\uff0c\u4e0d\u4f1a\u5411 FIFO \u5199\u5165\u4efb\u4f55\u5185\u5bb9\uff1a \u8bbe\u5907\u6587\u4ef6\u5c1a\u672a\u5f00\u653e\uff0c\u6216\u8005\u8bbe\u5907\u6587\u4ef6\u5df2\u6253\u5f00\u4f46\u65b0\u7684\u5e27\u5c1a\u672a\u5f00\u59cb\u3002<\/p>\n\n\n\n<p>\u5f53\u76f8\u673a\u4f20\u611f\u5668\u7684 HSYNC \u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c\u610f\u5473\u7740\u6570\u636e\u4fe1\u53f7\u5305\u542b\u6709\u6548\u50cf\u7d20\u3002\u8868\u8fbe\u5f0f\u201csample_valid &amp;&amp; hsync\u201d\u7684\u503c\u7ed3\u5408\u4e86\u4e24\u4e2a\u6761\u4ef6\uff1a \u5f53 @sample_valid \u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c @hsync \u548c @D \u5305\u542b\u6709\u6548\u503c\u3002\u56e0\u6b64\uff0c\u5982\u679c @hsync \u4e3a\u9ad8\u7535\u5e73\uff0c\u5219 @D \u7684\u503c\u88ab\u590d\u5236\u5230 @dataword\u7684\u4e00\u90e8\u5206\u4e2d\u3002\u53e6\u5916\uff0c\u5982\u679c @D \u88ab\u590d\u5236\u5230 @dataword \u7684\u6700\u540e\u90e8\u5206\uff08\u5373 @byte_position \u7b49\u4e8e 3\uff09\uff0c\u5219 @fifo_wr_en \u53d8\u9ad8\u7535\u5e73\u3002\u7ed3\u679c @dataword \u88ab\u5199\u5165\u5230 FIFO\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c @fifo_wr_en \u7684\u8868\u8fbe\u5f0f\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">fifo_wr_en &lt;= !fifo_has_been_full;<\/pre>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5982\u679c @fifo_has_been_full \u4e3a\u9ad8\u7535\u5e73\uff0c\u5219\u4e0d\u4f1a\u5411 FIFO\u5199\u5165\u4efb\u4f55\u5185\u5bb9\uff0c\u5982\u524d\u6240\u8ff0\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Verilog \u4ee3\u7801\u4e0e\u771f\u5b9e pins\u7684\u5bf9\u5e94\u5173\u7cfb<\/strong><\/h1>\n\n\n\n<p>\u4e0a\u9762\u7684 Verilog \u4ee3\u7801\u4f7f\u7528\u4e86\u540d\u4e3a J6\u7684 inout port \uff0c\u4f46\u662f\u4e0e\u8fd9\u4e2a\u7aef\u53e3\u7684\u8fde\u63a5\u5982\u4f55\u5230\u8fbe\u6392\u9488\u63a5\u63d2\u4ef6\u7684\u5462\uff1f\u7b54\u6848\u53ef\u4ee5\u5728 xillydemo.xdc\u4e2d\u627e\u5230\u3002\u8be5\u6587\u4ef6\u662f\u521b\u5efa bitstream \u7684 Vivado \u9879\u76ee\u7684\u4e00\u90e8\u5206\uff08\u4f4d\u4e8e\u201cvivado-essentials\u201d\u76ee\u5f55\u4e2d\uff09\u3002<\/p>\n\n\n\n<p>xillydemo.xdc \u5305\u542b FPGA \u4f5c\u4e3a\u7535\u5b50\u5143\u4ef6\u6b63\u5e38\u5de5\u4f5c\u6240\u9700\u7684\u5404\u79cd\u4fe1\u606f\u3002\u5176\u4e2d\uff0c\u8fd9\u4e2a\u6587\u4ef6\u5305\u542b\u4e86\u8fd9\u4e9b\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">[ ... ]<br><br>## J6 on board (BANK33 VADJ)<br>set_property PACKAGE_PIN U22  [get_ports {J6[0]}];   #J6\/1  = IO_B33_LN2<br>set_property PACKAGE_PIN T22  [get_ports {J6[1]}];   #J6\/2  = IO_B33_LP2<br>set_property PACKAGE_PIN W22  [get_ports {J6[2]}];   #J6\/3  = IO_B33_LN3<br>set_property PACKAGE_PIN V22  [get_ports {J6[3]}];   #J6\/4  = IO_B33_LP3<br>set_property PACKAGE_PIN Y21  [get_ports {J6[4]}];   #J6\/5  = IO_B33_LN9<br>set_property PACKAGE_PIN Y20  [get_ports {J6[5]}];   #J6\/6  = IO_B33_LP9<br>set_property PACKAGE_PIN AB22 [get_ports {J6[6]}];   #J6\/7  = IO_B33_LN7<br>set_property PACKAGE_PIN AA22 [get_ports {J6[7]}];   #J6\/8  = IO_B33_LP7<br><br>[ ... ]   <\/pre>\n\n\n\n<p>\u7b2c\u4e00\u884c\u8868\u793a\u4fe1\u53f7 J6[0] \u5e94\u8fde\u63a5\u5230 U22\u3002\u8fd9\u662f FPGA\u7269\u7406\u5c01\u88c5\u4e0a\u7684\u4f4d\u7f6e\u3002\u6839\u636e Smart Zynq\u7684 \u539f\u7406\u56fe\uff0c\u8fd9\u4e2a FPGA pin \u8fde\u63a5\u5230\u6392\u9488\u7684\u7b2c\u4e00\u4e2a\u5f15\u811a\u4e0a \u3002\u53e6\u4e00\u4e2a\u7aef\u53e3\u7684\u4f4d\u7f6e\u4e5f\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u5b9a\u4e49\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>\u7ed3\u8bba<\/strong><\/h1>\n\n\n\n<p>\u672c\u9875\u4ecb\u7ecd\u4e86\u5982\u4f55\u4ece OV7670 \u83b7\u53d6\u50cf\u7d20\u6570\u636e\u5e76\u4f7f\u7528 Xillybus IP\u6838\u5c06\u6b64\u6570\u636e\u53d1\u9001\u5230 host \u3002<\/p>\n\n\n\n<p><a href=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" data-type=\"link\" data-id=\"http:\/\/www.hellofpga.com\/index.php\/2024\/06\/02\/ov7670-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u672c\u6559\u7a0b\u7684\u4e0b\u4e00\u90e8\u5206<\/a>\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 Xillybus IP \u6838\u5728 SCCB \uff08\u5373 I<sup>2<\/sup>C\uff09\u7684\u5e2e\u52a9\u4e0b\u66f4\u6539\u76f8\u673a\u4f20\u611f\u5668\u7684\u5bc4\u5b58\u5668 \u3002\u8fd9\u5bf9\u4e8e\u66f4\u6539\u76f8\u673a\u7684\u53c2\u6570\u5f88\u6709\u7528\u3002\u7279\u522b\u662f\uff0c\u8fd9\u5bf9\u4e8e\u83b7\u5f97\u5177\u6709\u6b63\u786e\u989c\u8272\u7684\u56fe\u50cf\u662f\u5fc5\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5c06 OV7670\u6444\u50cf\u5934\u6a21\u5757\u8fde\u63a5\u5230 Smart Zynq \u5e76\u5728\u677f\u5b50\u672c\u8eab\u7684 HDMI\u8f93\u51fa\u4e0a\u67e5\u770b\u5b9e\u65f6\u89c6\u9891\u4fe1\u53f7\u3002\u6211\u8fd8\u5c06\u5c55\u793a\u5982\u4f55\u501f\u52a9\u7b80\u5355\u7684 Linux \u547d\u4ee4\u8f7b\u677e\u5730\u5c06 raw video stream 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