![\"\"](\"http:\/\/www.hellofpga.com\/wp-content\/uploads\/2022\/10\/image-94.png\")
<\/figure>\n\n\n\n\u56e0\u4e3a\u4e09\u4e2a\u6ce2\u5f62\u7684\u5468\u671fT\u548c\u9891\u7387F\u662f\u76f8\u540c\u7684\uff0c\u6bd4\u65b9\u8bf4 \u4e09\u4e2aPWM\u7684\u6ce2\u5f62\u90fd\u662f1KHZ\uff0c\u90a3\u4e481\u79d2\u949f\u5185\uff0c\u4e09\u4e2aPWM\u6ce2\u5f62\u90fd\u4f1a\u51fa\u73b01000\u4e2a\u5468\u671f\u4e3aT\u7684\u65b9\u6ce2\u3002\u5982\u679c\u6b64\u65f6\u62ff\u8fd93\u4e2a\u6ce2\u5f62\u5206\u522b\u53bb\u70b9\u4eae3\u4e2aLED\u706f\uff0c\u90a33\u4e2aLED\u90fd\u4f1a\u95ea\u70c11000\u6b21\uff08\u53ea\u662f\u56e0\u4e3a\u4eba\u773c\u7684\u89c6\u89c9\u6b8b\u7559\u56e0\u7d20\uff0c\u6240\u4ee5\u611f\u89c9\u4e0d\u5230\u8fd9\u4e2a\u95ea\u70c1\uff09\uff0c\u4f46\u662f\u56e0\u4e3a3\u8005\u7684\u5360\u7a7a\u6bd4\u4e0d\u540c\uff08\u9ad8\u7535\u5e73\u5360\u6574\u4e2a\u5468\u671f\u7684\u767e\u5206\u6bd4\u4e0d\u540c\uff09\u5bfc\u81f4\u6700\u4e0a\u976225%\u5360\u7a7a\u6bd4\u7684\u6ce2\u5f62\u5355\u4f4d\u65f6\u95f4\u5185\u4eae\u7684\u65f6\u95f4\u6700\u5c11\uff0c75%\u5360\u7a7a\u6bd4\u7684\u6ce2\u5f62\u4eae\u7684\u65f6\u95f4\u6700\u4e45\u3002\u53cd\u5e94\u5230\u89c6\u89c9\u4e0a\u7684\u7ed3\u679c\u5c31\u662f \u7b2c\u4e09\u4e2a\u6ce2\u5f62\u70b9\u4eae\u7684LED\u706f\u6700\u4eae\uff0c\u7b2c\u4e00\u4e2a\u6ce2\u5f62\u5bf9\u5e94\u7684LED\u706f\u6700\u6697\uff0c\u8fd9\u4e5f\u5c31\u662fPWM\u8c03\u5149\u7684\u7b80\u5355\u539f\u7406\u3002\u540c\u6837\u7684\u501f\u52a9\u8fd9\u4e2a\u65b9\u6cd5\u540c\u6837\u53ef\u4ee5\u5206\u6790\u7535\u673a\u7b49\u573a\u666f\u3002<\/p>\n\n\n\n
\u540c\u6837\u5f53\u5360\u7a7a\u6bd4\u4e3a0%\u65f6\uff0cLED\u706f\u5b8c\u5168\u7184\u706d\uff0c\u5f53\u5360\u7a7a\u6bd4\u4e3a100%\u65f6LED\u706f\u5b8c\u5168\u70b9\u4eae\uff0c\u501f\u52a9\u8fd9\u4e2a\u539f\u7406\uff0c\u6211\u4eec\u53ea\u8981\u5c06\u5360\u7a7a\u6bd4\u4ece0%\u9010\u6e10\u589e\u52a0\u5230100%\uff0c\u518d\u4ece100%\u9010\u6e10\u51cf\u5c11\u52300%\u4e0d\u65ad\u53d8\u5316\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u547c\u5438\u706f\u7684\u6548\u679c\u4e86\u3002<\/p>\n\n\n\n
\u4ee3\u7801\u7f16\u5199<\/h2>\n\n\n\n
\u9996\u5148\u6211\u4eec\u8981\u8bbe\u8ba1\u4e00\u4e2a\u5468\u671f\u6027\u7684\u8ba1\u6570\u5668\u6765\u6765\u8fdb\u884c\u6ce2\u5f62\u5468\u671f\u7684\u8ba1\u6570\uff0c\u6211\u4eec\u5b9a\u4e49\u5360\u7a7a\u6bd4\u7684\u9891\u7387\u4e3a1KHZ\uff0c\u90a3\u6ce2\u5f62\u7684\u4e00\u4e2a\u5468\u671f\u5c31\u662f1ms\uff0c\u572850mhz\u65f6\u949f\u4e0b\uff0c1ms\u76f8\u5f53\u4e8e\u632f\u8361\u4e8650000\u6b21\uff08\u5bf9\u5e94\u4e8c\u8fdb\u52361100001101010000\uff0c\u537316\u4f4d\uff09\uff0c\u6240\u4ee5\u8fd9\u91cc\u5b9a\u4e49\u4e00\u4e2a16\u4f4d\u7684\u5bc4\u5b58\u5668\u4f5c\u8ba1\u6570\u7528<\/p>\n\n\n\n
reg [15:0] period_cnt;<\/strong><\/pre>\n\n\n\n\u8ba1\u6570\u7684\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n
reg [15:0] time_count;\n \n\/\/\u4ece0-50000\u7684\u8ba1\u6570\u5668\uff0c\u53731ms\u8ba1\u6570\u5668\nalways @(posedge clk or negedge rst_n) begin\n if(!rst_n)begin\n time_count<=16'd0;\n end\n else if(time_count == 16'd50_000)\n time_count <= 16'd0;\n else \n time_count <= time_count + 1'b1;\nend<\/pre>\n\n\n\n\u5176\u4e2d if(!rst_n)begin time_count <=16\u2019d0; end \u8fd9\u53e5\u662f\u8d1f\u8d23\u590d\u4f4d\u7528\uff0c\u5916\u90e8rst_n\u4fe1\u53f7\u63a5\u5165\u5230\u6309\u952e\u4e0a<\/p>\n\n\n\n
\u4ec5\u4ec5\u6709\u8ba1\u6570\u5668\u4e0d\u80fd\u5b9e\u73b0\u6ce2\u5f62\u7684\u8f93\u51fa\u529f\u80fd\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u7b80\u5355\u5199\u4e2a \u8f93\u51fa50%\u65b9\u6ce2\u7684\u7a0b\u5e8f\uff0c\u4ec5\u4ec5\u4e00\u53e5\u8bdd\u5c31\u53ef\u4ee5\u4e86<\/p>\n\n\n\n
wire led=(time_count <16\u2019d25_000)?1:0;<\/p>\n\n\n\n
\u8fd9\u53e5\u8bdd\u76f8\u5f53\u4e8e\uff0c\u5728time_count\u75310\u8ba1\u6570\u523050_000\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u5c0f\u4e8e25000\u65f6\uff0c\u8f93\u51fa1\uff0c\u5f53\u5927\u4e8e25000\u65f6\u5019\u8f93\u51fa0\uff0c\u53c8\u56e0\u4e3a\u6574\u4e2a\u5468\u671f\u662f50000\uff0c\u800c25000\u521a\u597d\u662f\u4e00\u534a\uff0c\u90a3\u6837\u5c31\u4ea7\u751f\u4e86\u4e00\u534a\u7684\u9ad8\u7535\u5e73\uff0c\u4e00\u534a\u7684\u4f4e\u7535\u5e73\uff0c\u5373\u6807\u51c6\u768450%\u65b9\u6ce2\u3002<\/p>\n\n\n\n
\u6211\u4eec\u7684\u76ee\u6807\u662f\u8bbe\u8ba1\u547c\u5438\u706f\uff0c\u90a3\u53ea\u8981\u628a25000\u53d8\u6210\u4e00\u4e2a\u7531\u5c0f\u5230\u5927\u53c8\u4ece\u5927\u53d8\u5230\u5c0f\u7684\u5bc4\u5b58\u5668pwm_perid\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n
\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n
reg [15:0] pwm_perid=16'd0;\nreg mode=0;\/\/mode\u4e3a0\u5219\u81ea\u589e\uff0cmode\u4e3a1\u4e3a\u81ea\u51cf\nalways @(posedge clk or negedge rst_n) begin\n if(!rst_n)begin\n pwm_perid<=16'd0;\n end\n else if(time_count== 16'd50_000)begin\n if(mode==1'b0)begin\n if(pwm_perid<16'd50_000) pwm_perid<=pwm_perid+50;\n else mode<=1'b1;\n end\n else if(mode==1'b1)begin\n if(pwm_perid>16'd0) pwm_perid<=pwm_perid-50;\n else mode<=1'b0;\n end\n end\nend<\/pre>\n\n\n\n\u589e\u51cf\u7a0b\u5e8f\u7684\u6539\u53d8\u5468\u671f\u4e3a1ms\uff0c\u53731\u79d2\u949f\u6539\u53d81000\u6b21\uff0c\u8fd9\u91cc\u5077\u4e2a\u61d2\uff0c\u76f4\u63a5\u7528\u4e0a\u9762\u7684time_count\u8ba1\u6570\u5668\u6765\u4f5c\u8fd9\u8fb9\u7684\u6539\u53d8\u5468\u671f\u7528if(time_count== 16\u2019d50_000)\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u81ea\u5df1\u91cd\u65b0\u5199\u4e00\u4e2a\uff0c\u90fd\u4e00\u6837\u7684<\/p>\n\n\n\n
\u7a0b\u5e8f\u91cc\u6709\u4e00\u4e2areg mode\uff0c\u8fd9\u4e2a\u662f\u7528\u6765\u8bb0\u5f55\u5de5\u4f5c\u6a21\u5f0f\u7684\uff0cmode\u4e3a0\u5219pwm_perid\u81ea\u589e\uff0cmode\u4e3a1pwm_perid\u4e3a\u81ea\u51cf<\/p>\n\n\n\n
\u800cmode\u5207\u6362\u7684\u6761\u4ef6\u5c31\u662f \u5360\u7a7a\u6bd4\u8fbe\u5230\u6700\u5927\uff0c\u6216\u8005\u5360\u7a7a\u6bd4\u88ab\u51cf\u5c11\u52300%<\/p>\n\n\n\n
\u4ee3\u7801\u5f88\u7b80\u5355\uff0c\u76f4\u63a5\u7f16\u8bd1\u7efc\u5408\u5e76\u4e14\u4e0b\u8f7d\u8fdbFPGA\u89c2\u6d4b\u7ed3\u679c<\/p>\n\n\n\n
\u589e\u52a0\u7ea6\u675f\u6587\u4ef6\u5982\u4e0b<\/p>\n\n\n\n
set_property IOSTANDARD LVCMOS33 [get_ports led]\nset_property IOSTANDARD LVCMOS33 [get_ports clk]\nset_property IOSTANDARD LVCMOS33 [get_ports rst_n]\nset_property PACKAGE_PIN H16 [get_ports clk]\nset_property PACKAGE_PIN K16 [get_ports led]\nset_property PACKAGE_PIN G18 [get_ports rst_n]<\/pre>\n\n\n\n\u4e0b\u8f7d\u5b8c\u540e\u5c31\u80fd\u770b\u5230 LED1\u5728\u4e0d\u505c\u7684\u53d8\u91cf\u53d8\u6697\u53d8\u91cf\u53d8\u6697\u4e86<\/p>\n\n\n\n
\u5b8c\u6574\u5de5\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
12_PL_PWM_TEST_XC7Z010_1<\/a>\u4e0b\u8f7d<\/a><\/div>\n\n\n\n12_PL_PWM_TEST_XC7Z010_1<\/a>\u4e0b\u8f7d<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"PWM\u4e5f\u5373\u8109\u51b2\u5bbd\u5ea6\u8c03\u8bd5\u6280\u672f\uff0c\u662f\u7535\u5b50\u9886\u57df\u7684\u91cd\u8981\u6280\u672f\u4e4b\u4e00\uff08\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5f00\u5173\u7535\u6e90\uff0c\u7535\u673a\u901f\u5ea6\u63a7\u5236\uff0cLED\u706f\u4eae\u5ea6\u63a7\u5236\u7b49\u9886\u57df\uff09\uff0c\u7c7b\u4f3cDSP\uff0c\u5355\u7247\u673a\uff0cSTM32\u7b49\u5fae\u5904\u7406\u5668\u4e2d\u90fd\u5e26\u6709\u786c\u4ef6PWM\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528VERILOG\u8bed\u8a00\u6765\u5199\u4e00\u4e2aPWM\uff0c\u5e76\u901a\u8fc7\u547c\u5438\u706f\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6548\u679c\u7684\u6f14\u793a\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-2636","post","type-post","status-publish","format-standard","hentry","category-smart-zynq-board"],"views":618,"_links":{"self":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/2636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/comments?post=2636"}],"version-history":[{"count":3,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/2636\/revisions"}],"predecessor-version":[{"id":2643,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/posts\/2636\/revisions\/2643"}],"wp:attachment":[{"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/media?parent=2636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/categories?post=2636"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hellofpga.com\/index.php\/wp-json\/wp\/v2\/tags?post=2636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}