{"id":2242,"date":"2018-07-24T13:52:54","date_gmt":"2018-07-24T05:52:54","guid":{"rendered":"http:\/\/www.51cos.com\/?p=2242"},"modified":"2018-07-24T15:34:16","modified_gmt":"2018-07-24T07:34:16","slug":"2242","status":"publish","type":"post","link":"http:\/\/www.51cos.com\/?p=2242","title":{"rendered":"LCD\u70b9\u5c4f\u7684\u76f8\u5173\u77e5\u8bc6"},"content":{"rendered":"<p>LCD\u5373\u6db2\u6676\u663e\u793a\u5668\uff0c\u63a7\u5236\u539f\u7406\u662f\u63a7\u5236\u5176\u4e2d\u7684\u7535\u5b50\u67aa\uff0c\u5728n\u884c*n\u5217\u7684\u5c4f\u5e55\u4e0a\u6295\u5c04\u4e0d\u540c\u989c\u8272\u4ece\u800c\u5f62\u6210\u56fe\u50cf\u3002 <\/p>\n<p>\u7f16\u7a0b\u6b65\u9aa4\uff1a<\/p>\n<p>\u2460\u6253\u5f00LCD\u80cc\u5149<br \/>\n\u8bbe\u7f6eLCD\u80cc\u5149\u5bf9\u5e94\u7684GPIO\u7684\u503c\u3002<\/p>\n<p>\u2461\u6253\u5f00LCD\u7535\u6e90<br \/>\n\u4e5f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5176\u4ed6GPIO\u7528\u4f5cLCD\u7535\u6e90\u5f00\u5173\u3002<\/p>\n<p>\u2462\u8bbe\u7f6e\u5176\u4ed6\u4fe1\u53f7\u7ebf<br \/>\n\u5176\u4ed6\u4fe1\u53f7\u7ebf\u5305\u62ecVD0-VD23\u548cVFRAME\u3001VLINE\u3001VCLK\u7b49\u3002<\/p>\n<p>\u2463\u8bbe\u7f6eLCD\u7684\u9891\u7387(VCLK)<br \/>\nVCLK\u5176\u5b9e\u5c31\u662f\u6839\u636e \u6bcf\u79d2\u5e27\u6570*\u5e27\u884c\u6570*\u884c\u50cf\u7d20  \u8ba1\u7b97\u51fa\u6765\u7684\uff0c\u5e27\u884c\u6570\u548c\u884c\u50cf\u7d20\u9700\u8981\u5305\u542b\u7a7a\u767d\u6570\u548c\u540c\u6b65\u6570\u3002<\/p>\n<p>\u2464\u8bbe\u7f6e\u5176\u4ed6\u76f8\u5173\u53c2\u6570<br \/>\nLCD\u76f8\u5173\u7684\u53c2\u6570\u4e3b\u8981\u8fd8\u6709\u8fd9\u51e0\u4e2a\uff1a<br \/>\nLINEVAL: LCD\u6c34\u5e73\u50cf\u7d20-1\uff0c\u5982320-1 = 319<br \/>\nHOZVAL:  LCD\u5782\u76f4\u50cf\u7d20-1\uff0c\u5982240-1 = 239<br \/>\nHFPD:    \u884c\u5f00\u59cb\u524d\u7684VCLK\u65f6\u949f\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<br \/>\nHBPD:    \u884c\u7ed3\u675f\u540e\u7684VCLK\u65f6\u949f\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<br \/>\nHSPW:    \u884c\u4e4b\u95f4\u6c34\u5e73\u540c\u6b65\u7684\u65e0\u6548VCLK\u65f6\u949f\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<br \/>\nVFPD:    \u5e27\u6570\u636e\u5f00\u59cb\u524d\u7684\u7a7a\u767d\u884c\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<br \/>\nVBPD:    \u5e27\u6570\u636e\u7ed3\u675f\u540e\u7684\u7a7a\u767d\u884c\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<br \/>\nVSPW:    \u5e27\u4e4b\u95f4\u5782\u76f4\u540c\u6b65\u7684\u65e0\u6548\u884c\u6570(LCD\u5c4f\u5e55\u7684Datasheet\u4e00\u822c\u6709\u63a8\u8350\u503c)<\/p>\n<p>\u2465\u786e\u5b9a\u4fe1\u53f7\u7684\u6781\u6027<br \/>\nLCD\u63a7\u5236\u5668\u5141\u8bb8\u8bbe\u7f6eVCLK\u3001VLINE\u3001VFRAME\u7b49\u4fe1\u53f7\u7684\u6781\u6027(\u4e0a\u5347\u6cbf\u6709\u6548\u8fd8\u662f\u4e0b\u964d\u6cbf\u6709\u6548)\uff0c\u9700\u8981\u5bf9\u7167LCD\u7684Datasheet\u4e00\u4e00\u786e\u8ba4\u3002<\/p>\n<p>3.<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405524570.png\"><img loading=\"lazy\" decoding=\"async\" width=\"711\" height=\"575\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405524570.png\" alt=\"\" class=\"aligncenter size-full wp-image-2243\" \/><\/a><\/p>\n<p>4.<\/p>\n<p>A\uff1a\u663e\u793a\u6307\u9488\u4ece\u77e9\u5f62\u5de6\u4e0a\u89d2\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u4e2a\u70b9\u5f00\u59cb\uff0c\u4e00\u4e2a\u70b9\u4e00\u4e2a\u70b9\u7684\u5728LCD\u4e0a\u663e\u793a\uff0c\u5728\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u4e0a\u7528\u65f6\u95f4\u7ebf\u8868\u793a\u5c31\u4e3aVCLK\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u50cf\u7d20\u65f6\u949f\u4fe1\u53f7\uff1b<br \/>\nB\uff1a\u5f53\u663e\u793a\u6307\u9488\u4e00\u76f4\u663e\u793a\u5230\u77e9\u5f62\u7684\u53f3\u8fb9\u5c31\u7ed3\u675f\u8fd9\u4e00\u884c\uff0c\u90a3\u4e48\u8fd9\u4e00\u884c\u7684\u52a8\u4f5c\u5728\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u4e2d\u5c31\u79f0\u4e4b\u4e3a1 Line\uff1b<br \/>\nC\uff1a\u63a5\u4e0b\u6765\u663e\u793a\u6307\u9488\u53c8\u56de\u5230\u77e9\u5f62\u7684\u5de6\u8fb9\u4ece\u7b2c\u4e8c\u884c\u5f00\u59cb\u663e\u793a\uff0c\u6ce8\u610f\uff0c\u663e\u793a\u6307\u9488\u5728\u4ece\u7b2c\u4e00\u884c\u7684\u53f3\u8fb9\u56de\u5230\u7b2c\u4e8c\u884c\u7684\u5de6\u8fb9\u662f\u9700\u8981\u4e00\u5b9a\u7684\u65f6\u95f4\u7684\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u884c\u5207\u6362\uff1b<br \/>\nD\uff1a\u5982\u6b64\u7c7b\u63a8\uff0c\u663e\u793a\u6307\u9488\u5c31\u8fd9\u6837\u4e00\u884c\u4e00\u884c\u7684\u663e\u793a\u81f3\u77e9\u5f62\u7684\u53f3\u4e0b\u89d2\u624d\u628a\u4e00\u526f\u56fe\u663e\u793a\u5b8c\u6210\u3002\u56e0\u6b64\uff0c\u8fd9\u4e00\u884c\u4e00\u884c\u7684\u663e\u793a\u5728\u65f6\u95f4\u7ebf\u4e0a\u770b\uff0c\u5c31\u662f\u65f6\u5e8f\u56fe\u4e0a\u7684HSYNC<\/p>\n<p>E\uff1a\u7136\u800c\uff0cLCD\u7684\u663e\u793a\u5e76\u4e0d\u662f\u5bf9\u4e00\u526f\u56fe\u50cf\u5feb\u901f\u7684\u663e\u793a\u4e00\u4e0b\uff0c\u4e3a\u4e86\u6301\u7eed\u548c\u7a33\u5b9a\u7684\u5728LCD\u4e0a\u663e\u793a\uff0c\u5c31\u9700\u8981\u5207\u6362\u5230\u53e6\u4e00\u5e45\u56fe\u4e0a(\u53e6\u4e00\u5e45\u56fe\u53ef\u4ee5\u548c\u4e0a\u4e00\u526f\u56fe\u4e00\u6837\u6216\u8005\u4e0d\u4e00\u6837\uff0c\u76ee\u7684\u53ea\u662f\u4e3a\u4e86\u5c06\u56fe\u50cf\u6301\u7eed\u7684\u663e\u793a\u5728LCD\u4e0a)\u3002\u90a3\u4e48\u8fd9\u4e00\u526f\u4e00\u526f\u7684\u56fe\u50cf\u5c31\u79f0\u4e4b\u4e3a\u5e27\uff0c\u5728\u65f6\u5e8f\u56fe\u4e0a\u5c31\u8868\u793a\u4e3a1 Frame\uff0c\u56e0\u6b64\u4ece\u65f6\u5e8f\u56fe\u4e0a\u53ef\u4ee5\u770b\u51fa1 Line\u53ea\u662f1 Frame\u4e2d\u7684\u4e00\u884c\uff1b<br \/>\nF\uff1a\u540c\u6837\u7684\uff0c\u5728\u5e27\u4e0e\u5e27\u5207\u6362\u4e4b\u95f4\u4e5f\u662f\u9700\u8981\u4e00\u5b9a\u7684\u65f6\u95f4\u7684\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u5e27\u5207\u6362\uff0c\u90a3\u4e48LCD\u6574\u4e2a\u663e\u793a\u7684\u8fc7\u7a0b\u5728\u65f6\u95f4\u7ebf\u4e0a\u770b\uff0c\u5c31\u53ef\u8868\u793a\u4e3a\u65f6\u5e8f\u56fe\u4e0a\u7684VSYNC<\/p>\n<p> #define CLKVAL_TFT       (7)<br \/>\n#define LCD_XSIZE_TFT    (320)<br \/>\n#define LCD_YSIZE_TFT    (240)<br \/>\n#define SCR_XSIZE_TFT    (320)<br \/>\n#define SCR_YSIZE_TFT    (240)<br \/>\n#define HOZVAL_TFT       (LCD_XSIZE_TFT &#8211; 1)<br \/>\n#define LINEVAL_TFT      (LCD_YSIZE_TFT &#8211; 1)<br \/>\n\/********************************************************************\/<br \/>\n#define VBPD     (14)     \/\/\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9<br \/>\n#define VFPD     (11)     \/\/\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9<br \/>\n#define VSPW     (2)     \/\/\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd<\/p>\n<p>#define HBPD     (37)    \/\/\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9<br \/>\n#define HFPD     (19)     \/\/\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9<br \/>\n#define HSPW     (29)    \/\/\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd<br \/>\n\/********************************************************************\/  <\/p>\n<p>LCD\u5404\u5bc4\u5b58\u5668\u7684\u914d\u7f6e\u3002<br \/>\n\u5148\u8d34\u4e0aLCD\u65f6\u5e8f\u56fe\uff1a<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405555828.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"513\" height=\"503\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405555828.jpg\" alt=\"\" class=\"aligncenter size-full wp-image-2247\" \/><\/a><\/p>\n<p>\u5219\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9  VBPD = Tvb-1=14<br \/>\n \u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9  VFPD  =  Tvf-1      =11<br \/>\n\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd VSPW   =  Tvp-1     =2<br \/>\n\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9  HBPD  =   Thb-1    = 37<br \/>\n\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9  HFPD      =  Thf-1     =19<br \/>\n\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd  HSPW     =Thp-1     =29<br \/>\nHOZVAL\uff1d320\uff0d1<br \/>\nLINEVAL\uff1d240\uff0d1<br \/>\n\u4e0b\u9762\u6211\u4eec\u5c31\u5177\u4f53\u8ba1\u7b97\u4e00\u4e0b\u884c\u9891\uff08HSF\uff09\u548c\u573a\u9891\uff08VSF\uff09\uff1a<\/p>\n<p>HSF\uff1dVCLK\u00f7[(HSPW\uff0b1)\uff0b(HSPD\uff0b1)\uff0b(HFPD\uff0b1)\uff0b(HOZVAL\uff0b1)]<br \/>\nVSF\uff1dHSF\u00f7[(VSPW\uff0b1)\uff0b(VBPD\uff0b1)\uff0b(VFPD\uff0b1)\uff0b(LINEVAL\uff0b1)]<br \/>\nVCLK\uff1dHCLK\u00f7[(CLKVAL\uff0b1)\u00d72]<br \/>\n\u53ef\u5f97\u51faclkval\u503c\u5373setclkval.<\/p>\n<p>\u4e4b\u524d\u8001\u662f\u641e\u4e0d\u6e05\u695aLCD\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u7684pixclock \u7684\u8ba1\u7b97\u65b9\u6cd5\uff0c\u95f2\u6742\u6e05\u695a\u4e86\uff0c\u8d76\u7d27\u8bb0\u5f55\u4e0b\u6765\uff1a<\/p>\n<p>pixclock \u7684\u8ba1\u7b97\uff1a<br \/>\nDOTCLK = f frame \u00d7 (X + HBP + HFP+HSPW ) \u00d7 (Y + VBP + VFP+VSPW)   ( \u5355\u4f4d\uff1a MHz)<br \/>\npixclock = 1012 \/ DOTCLK= 1012 \/ \uff08f frame \u00d7 (X + HBP + HFP+HSPW ) \u00d7 (Y + VBP + VFP+VSPW)\uff09 ( \u5355\u4f4d\uff1a\u76ae\u79d2 )<\/p>\n<p>f frame \u4e3a\u5e27\u9891\u7387<br \/>\n<a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405560073.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"499\" height=\"216\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072405560073.gif\" alt=\"\" class=\"aligncenter size-full wp-image-2248\" \/><\/a><\/p>\n<p> \u6709\u4eba\u4ecb\u7ecd\u4e86\u6709\u5173\u5176\u53c2\u6570\u7684\u8ba1\u7b97\uff0c\u8fd9\u6837\u66f4\u80fd\u4fc3\u8fdb\u6211\u4eec\u5bf9\u5176\u7684\u7406\u89e3\u3002<\/p>\n<p>\u65b9\u6cd5\u5982\u4e0b\uff1a<br \/>\nVBPD\uff1a\u786e\u5b9a\u5e27\u540c\u6b65\u4fe1\u53f7\u548c\u5e27\u6570\u636e\u4f20\u8f93\u524d\u7684\u4e00\u6bb5\u5ef6\u8fdf\u65f6\u95f4\uff0c\u662f\u5e27\u6570\u636e\u4f20\u8f93\u524d\u5ef6\u8fdf\u65f6\u95f4\u548c\u884c\u540c\u6b65\u65f6\u949f\u95f4\u9694\u5bbd\u5ea6\u7684\u6bd4\u503c\uff0c\u5982\u56fe\uff0cVBPD=t3\uff0ft6=1.02 mS\uff0f31.77\u03bcs=32\u3002<\/p>\n<p>VFPD\uff1a\u786e\u5b9a\u5e27\u6570\u636e\u4f20\u8f93\u5b8c\u6210\u540e\u5230\u4e0b\u4e00\u5e27\u540c\u6b65\u4fe1\u53f7\u5230\u6765\u7684\u4e00\u6bb5\u5ef6\u8fdf\u65f6\u95f4,\u662f\u5e27\u6570\u636e\u4f20\u8f93\u540e\u5ef6\u8fdf\u65f6\u95f4\u548c\u884c\u540c\u6b65\u65f6\u949f\u95f4\u9694\u5bbd\u5ea6\u7684\u6bd4\u503c\uff0c\u5982\u56fe\uff0cVFPD=t5\uff0ft6=0.35 ms\uff0f31.77\u03bcs=11\u3002<\/p>\n<p>VSPW\uff1a\u786e\u5b9a\u5e27\u540c\u6b65\u65f6\u949f\u8109\u51b2\u5bbd\u5ea6\uff0c\u662f\u5e27\u540c\u6b65\u4fe1\u53f7\u65f6\u949f\u5bbd\u5ea6\u548c\u884c\u540c\u6b65\u65f6\u949f\u95f4\u9694\u5bbd\u5ea6\u7684\u6bd4\u503c\u3002VSPW=t2\uff0ft6=0.06 ms\uff0f31.77\u03bcs=2\u3002<\/p>\n<p>HBPD\uff1a\u786e\u5b9a\u884c\u540c\u6b65\u4fe1\u53f7\u548c\u884c\u6570\u636e\u4f20\u8f93\u524d\u7684\u4e00\u6bb5\u5ef6\u8fdf\u65f6\u95f4\uff0c\u63cf\u8ff0\u884c\u6570\u636e\u4f20\u8f93\u524d\u5ef6\u8fdf\u65f6\u95f4\u5185VCLK\u8109\u51b2\u4e2a\u6570\uff0cVBPD=t7\u00d7VCLK=1.89 \u03bcs\u00d725MHz=47\u3002<\/p>\n<p>HFPD\uff1a\u786e\u5b9a\u884c\u6570\u636e\u4f20\u8f93\u5b8c\u6210\u540e\u5230\u4e0b\u4e00\u884c\u540c\u6b65\u4fe1\u53f7\u5230\u6765\u7684\u4e00\u6bb5\u5ef6\u8fdf\u65f6\u95f4\uff0c\u63cf\u8ff0\u884c\u6570\u636e\u4f20\u8f93\u540e\u5ef6\u8fdf\u65f6\u95f4\u5185VCLK\u8109\u51b2\u4e2a\u6570\uff0c\u5982\u56fe\uff0cHFPD=t9\u00d7VCLK=0.94 \u03bcs\u00d725 MHz=&#8221;24&#8243;\u3002<\/p>\n<p>HSPW\uff1a\u786e\u5b9a\u884c\u540c\u6b65\u65f6\u949f\u8109\u51b2\u5bbd\u5ea6\u3002\u63cf\u8ff0\u884c\u540c\u6b65\u8109\u51b2\u5bbd\u5ea6\u65f6\u95f4\u5185VCLK\u8109\u51b2\u4e2a\u6570\uff0c\u5982\u56fe\uff0cHSPW=3.77\u03bcs\u00d725 MHz=&#8221;94&#8243;\u3002<\/p>\n<p>\u5916\u90e8\u5f15\u811a\u4fe1\u53f7\uff1a<\/p>\n<p>VSYNC: \u5782\u76f4\u540c\u6b65\u4fe1\u53f7,\u8868\u793a\u626b\u63cf1\u5e27\u7684\u5f00\u59cb\u3002<br \/>\nHSYNC: \u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\uff0c\u8868\u793a\u626b\u63cf1\u884c\u7684\u5f00\u59cb\u3002<br \/>\nVDEN\uff1a\u6570\u636e\u4f7f\u80fd\u4fe1\u53f7\u3002<br \/>\nVD[23:0] : LCD\u50cf\u7d20\u6570\u636e\u8f93\u51fa\u7aef\u53e3\u3002<br \/>\nVCLK\uff1a\u50cf\u7d20\u65f6\u949f\u4fe1\u53f7\u3002<br \/>\n\u5bc4\u5b58\u5668\u53c2\u6570\uff1a<br \/>\nVSPW\uff1a\u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd\uff0c\u5355\u4f4d\u4e3a1\u884c\uff08Line\uff09\u7684\u65f6\u95f4\u3002<br \/>\nVFPD: \u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9\uff0c\u5355\u4f4d\u4e3a1\u884c\uff08Line\uff09\u7684\u65f6\u95f4\u3002<br \/>\nVBPD: \u5782\u76f4\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9\uff0c\u5355\u4f4d\u4e3a1\u884c\uff08Line\uff09\u7684\u65f6\u95f4\u3002<br \/>\nLINEVAL \uff1a\u5782\u76f4\u663e\u793a\u5c3a\u5bf8-1\uff0c\u5373\u5c4f\u884c\u5bbd-1\u3002<br \/>\nHBPD\uff1a\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u540e\u80a9\uff0c\u5355\u4f4d\u4e3a1VCLK\u7684\u65f6\u95f4\u3002<br \/>\nHFPD\uff1a\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u524d\u80a9\uff0c\u5355\u4f4d\u4e3a1VCLK\u7684\u65f6\u95f4\u3002<br \/>\nHSPW\uff1a\u6c34\u5e73\u540c\u6b65\u4fe1\u53f7\u7684\u8109\u5bbd\uff0c\u5355\u4f4d\u4e3a1VCLK\u7684\u65f6\u95f4\u3002<br \/>\nHOZVAL\uff1a\u6c34\u5e73\u663e\u793a\u5c3a\u5bf8-1\uff0c\u5373\u5c4f\u5217\u5bbd-1\u3002<br \/>\n\u7531\u4e0a\u56fe\u53ef\u77e5\uff1a<br \/>\n\u626b\u63cf\u4e00\u5e27\u6240\u9700\u7684\u65f6\u95f4\uff1a<br \/>\n=((VSPW+1)+(VBPD+1)+( LINEVAL+1)+(VFPD+1))\u4e2a\u884c\u65f6\u95f4\u3002<br \/>\n\u626b\u63cf\u4e00\u884c\u6240\u6240\u9700\u7684\u65f6\u95f4\uff1a<br \/>\n= ((HSPW+1)+(HSPD+1\uff09+(HFPD+1\uff09+ (HOZVAL+1))\u4e2aVCLK\u65f6\u95f4\u3002<br \/>\n\u800c\u4e00\u4e2aVCLK\u65f6\u95f4\u7531LCD\u5bc4\u5b58\u5668LCDCON1\u5185\u7684CLKVAL\u51b3\u5b9a=HCLK\/[2*(CLKVAL+1)]<\/p>\n<p>\u56e0\u6b64\u626b\u63cf\u4e00\u5e27\u6240\u9700\u7684\u65f6\u95f4\uff1a<br \/>\nT=[(VSPW+1)+(VBPD+1)+( LINEVAL+1)+(VFPD+1)]* [(HSPW+1)+(HSPD+1\uff09+(HFPD+1\uff09+ (HOZVAL+1)]* HCLK\/[2*(CLKVAL+1)]<br \/>\n\u5373\u5e27\u9891\u7387\u4e3a:1\/T<br \/>\n\u6ce8\u610f\uff1a\u4ee5\u4e0a\u7684\u65f6\u5e8f\u56fe\u4e3a\u4e00\u822cTFT\u7684\u65f6\u5e8f\u56fe\u3002\u5b9e\u9645TFT\u5bf9\u5e94\u7684\u65f6\u5e8f\u56fe\u65f6\u5e8f\u53ef\u80fd\u4e0d\u4e00\u6837\uff08\u6bd4\u5982\u6781\u6027\uff0c\u7b26\u53f7\u7b49\uff09\u3002<\/p>\n<p>CRT \u4fa7\u9762\u770b\u662f\u4e2a\u6f0f\u6597\u72b6\u7684\u771f\u7a7a\u7684\u4e1c\u4e1c, \u6839\u90e8\u5c31\u662f\u7535\u5b50\u67aa, \u6253\u51fa\u7684\u7535\u5b50\u649e\u51fb\u524d\u9762\u7684\u73bb\u7483\u9762\u4e0a\u7684\u8367\u5149\u7269\u8d28, \u8367\u5149\u7269\u53d1\u5149. \u63a7\u5236\u7535\u5b50\u67aa\u6309\u89c4\u5f8b\u5c04\u51fa\u7535\u5b50, \u9010\u884c\u7684\u6253\u5230\u8367\u5149\u7269\u8d28\u4e0a, \u6253\u5b8c\u4e00\u884c(\u4e5f\u5373\u626b\u63cf\u5b8c\u4e00\u884c), \u5c31\u56de\u5934\u626b\u63cf\u4e0b\u4e00\u884c&#8230;.. \u626b\u63cf\u5b8c\u4e00\u4e2a\u663e\u793a\u5c4f\u6240\u6709\u7684\u884c\u540e, \u5c31\u662f\u4e00\u5e45\u5b8c\u6574\u7684\u753b\u9762\u4e86, \u79f0\u4e3a\u4e00\u5e27(frame), \u626b\u63cf\u8fc7\u7a0b\u5982\u679c\u975e\u5e38\u5feb, \u4eba\u773c\u770b\u5230\u662f\u4e00\u5e45\u5b8c\u6574\u753b\u9762, \u4f46\u5b9e\u9645\u662f\u4e00\u4e2a\u4e2a\u70b9\u53d1\u4e0d\u540c\u5149\u7ec4\u6210\u7684. \u626b\u63cf\u5f97\u6162\u65f6, \u5c31\u4f1a\u89c9\u5f97\u95ea\u70c1\u4e86(\u4ee5\u524d\u542c\u8001\u5e08\u8bb2\u8bfe, \u8bf4\u5728\u4ed6\u4eec\u7684\u5e74\u4ee3, \u80fd\u660e\u663e\u770b\u5230\u4e00\u884c\u4e00\u884c\u5237\u8fc7\u7684\u58ee\u89c2\u573a\u666f).<\/p>\n<p>\u4e00\u5e27\u626b\u63cf\u5b8c, \u518d\u56de\u5934\u4ece\u7b2c\u4e00\u884c\u5f00\u59cb\u7ee7\u7eed\u626b\u63cf, \u91cd\u590d\u8fc7\u7a0b. \u770b\u5230\u7684\u5c31\u662f\u6301\u7eed\u5728\u663e\u793a\u7684\u753b\u9762\u4e86(\u5b9e\u9645\u4e0a, \u7535\u5b50\u7684\u8fd0\u52a8\u8f68\u8ff9\u662f\u7531\u78c1\u573a\u63a7\u5236\u7684, \u7535\u5b50\u67aa\u6ca1\u6709\u673a\u68b0\u7684\u8fd0\u52a8, \u4e3a\u597d\u7406\u89e3, \u5c31\u5f53\u662f\u7535\u5b50\u67aa\u505a\u4e86\u673a\u68b0\u8fd0\u52a8\u5427).<\/p>\n<p>\u591a\u6570\u663e\u793a\u5668\u9009\u62e9\u4ece\u5de6\u4e0a\u89d2\u5f00\u59cb, \u4ece\u5de6\u81f3\u53f3, \u5230\u4e86\u53f3\u8fb9\u754c, \u518d\u504f\u8f6c\u5230\u5de6\u8fb9\u754c\u7684\u4e0b\u4e00\u884c, \u8fd9\u662f\u6240\u8c13\u7684\u201dZ\u201d\u578b\u626b\u63cf.<br \/>\n\u7c7b\u4f3c\u5730\u626b\u63cf\u5b8c\u6700\u540e\u4e00\u5e27\u65f6, \u8981\u504f\u8f6c\u56de\u5de6\u4e0a\u89d2\u8d77\u59cb\u5904, \u51c6\u5907\u626b\u63cf\u4e0b\u4e00\u5e27.<\/p>\n<p>HSYNC \u4fe1\u53f7\u7528\u4e8e\u544a\u8bc9\u7535\u5b50\u67aa\u8be5\u626b\u63cf\u4e0b\u4e00\u884c\u4e86, \u5373\u8981\u8f6c\u5230\u4e0b\u4e00\u884c\u8d77\u59cb\u5904\u4e86\uff1b<br \/>\nVSYNC \u4fe1\u53f7\u544a\u8bc9\u7535\u5b50\u67aa\u8be5\u663e\u793a\u4e0b\u4e00\u5e27\u4e86, \u5373\u8be5\u8f6c\u56de\u5de6\u4e0a\u89d2\u8d77\u59cb\u5904\u4e86\uff1b<br \/>\nH for Horizontal, V for vertical.<br \/>\n\u5728\u8fd9\u91cc Hsync, Vsync \u4e24\u8005\u5404\u8868\u793a\u4e00\u79cd\u4fe1\u53f7, \u5206\u522b\u7531 HSPW \u53ca VSPW \u4e24\u4e2a\u53c2\u6570\u786e\u5b9a\u4fe1\u53f7\u6301\u7eed\u65f6\u95f4, \u4e5f\u5c31\u662f\u8109\u51b2\u7684\u5bbd\u5ea6.<\/p>\n<p> \u5728\u626b\u63cf\u4e00\u884c\u4e2d, \u9996\u5148HSYNC \u8109\u51b2\u4fe1\u53f7\u4e3a\u9ad8\u7535\u5e73, \u4e00\u53d1\u51fa\u6b64\u4fe1\u53f7, \u7535\u5b50\u67aa\u8fc5\u901f\u79fb\u56de\u5de6\u8fb9\u754c, \u671f\u95f4\u7535\u5b50\u67aa\u4e0d\u53d1\u5c04\u7535\u5b50.<\/p>\n<p>\u5728 HSYNC \u4fe1\u53f7\u6301\u7eed\u65f6\u95f4\u4e0a\u7684\u67d0\u70b9, \u7535\u5b50\u67aa\u5f00\u59cb\u518d\u6b21\u5411\u53f3\u626b\u63cf\u4e86, \u7b49 HSYNC \u4fe1\u53f7\u7ed3\u675f, \u8868\u793a\u8be5\u5f00\u59cb\u663e\u793a\u4e0b\u4e00\u884c\u7684\u6570\u636e\u4e86, \u7535\u5b50\u67aa\u53c8\u8981\u5f00\u59cb\u53d1\u5c04\u7535\u5b50.<br \/>\n\u5728HSYNC \u4fe1\u53f7\u7ed3\u675f\u4e0e\u5f00\u59cb\u663e\u793a\u6570\u636e\u4e4b\u95f4, \u53ef\u4ee5\u63d2\u5165\u4e00\u6bb5\u5ef6\u65f6(\u7531 HBPD \u53c2\u6570\u63a7\u5236)\u8ba9\u663e\u793a\u5c4f\u4ecd\u7136\u4e0d\u663e\u793a\u6709\u6548\u6570\u636e(\u6548\u679c\u5c31\u662f\u9ed1\u8272), \u662f\u4e3a\u663e\u793a\u5c4f\u5de6\u8fb9\u6846.<br \/>\n\u5230 HFPD \u7ed3\u675f, \u7535\u5b50\u67aa\u624d\u53ef\u4ee5\u53d1\u5c04\u7535\u5b50, \u663e\u793a\u8be5\u884c\u7684\u6709\u6548\u6570\u636e.<\/p>\n<p>\u663e\u793a\u5b8c\u6bd5. \u53c8\u8be5\u5f00\u59cb\u53d1\u51fa HSYNC \u4fe1\u53f7\u4e86. \u5728\u4e00\u884c\u4e2d\u6709\u6548\u6570\u636e\u626b\u63cf\u5b8c\u6bd5\u4e0e HSYNC \u4fe1\u53f7\u53d1\u51fa\u4e4b\u95f4\u4e5f\u63d2\u5165\u4e00\u6bb5\u5ef6\u65f6 HFPD, \u662f\u4e3a\u663e\u793a\u5c4f\u53f3\u8fb9\u6846,<\/p>\n<p>\u4e4b\u540e, \u5c31\u662f\u91cd\u590d\u8fc7\u7a0b\u4e86.\u56e0\u6b64, \u663e\u793a\u4e00\u884c\u65f6\u5e8f\u4e3a:  HSPW -> HBPD -> \u626b\u63cf\u6570\u636e -> HFPD .<\/p>\n<p> \u7c7b\u4f3c\u5730, \u5782\u76f4\u626b\u63cf\u4e00\u5e27\u7684\u65f6\u5e8f:VSPW -> VBPD -> \u626b\u63cf\u6709\u6548\u884c -> VFPD .<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8981\u6709\u8fb9\u6846(vbpd, vfpd, hbpd, hfpd)? \u6309\u4e0a\u8fb9\u8d34\u51fa\u7f51\u9875\u7684\u8bf4\u6cd5:<br \/>\nUsually, one doesn&#8217;t use that feature nowadays, as we have tunable monitors that allow stretching the mode to the physical limits of the monitor.<\/p>\n<p>\u5bf9\u4e8e TFT LCD, \u4f46\u8fd9\u4e9b\u53c2\u6570\u4f5c\u7528\u662f\u540c\u6837\u7684. \u4f46\u5982\u4f55\u786e\u5b9a ?  TFT \u7684 LCD \u7684 datasheet \u4e2d\u4e00\u5b9a\u5f97\u6807\u6709.<\/p>\n<p>\u5982\u578b\u53f7 WXCAT35-TG3  3.5 \u5bf8\u7684\u6db2\u6676\u4e2d\u6709\u8868\u5982\u4e0b:<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072406262573.png\"><img loading=\"lazy\" decoding=\"async\" width=\"691\" height=\"733\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072406262573.png\" alt=\"\" class=\"aligncenter size-full wp-image-2252\" \/><\/a><\/p>\n<p>\u5bf9\u7167\u4e0b\u8fb9\u7684\u65f6\u5e8f\u56fe(\u6ce8: \u65f6\u5e8f\u56fe\u7684 Vsync, Hsync \u4fe1\u53f7(\u7ea2\u6846\u5708\u51fa\u7684)\u8ddf\u4e0a\u8fb9\u8bb2\u7684\u6709\u70b9\u51fa\u5165, \u4fe1\u53f7\u90fd\u662f\u4f4e\u7535\u5e73,<br \/>\n\u800c\u975e\u9ad8\u7535\u5e73, \u56e0\u6b64\u7f16\u7a0b\u65f6\u8981\u8bbe\u7f6e\u4fe1\u53f7\u53cd\u76f8, \u5982s3c244a \u7684 LCDCON5\u7684INVLINE \u53ca INVFRAME \u5373\u662f\u5e72\u8fd9\u6d3b\u7684):<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072406272837.png\"><img loading=\"lazy\" decoding=\"async\" width=\"948\" height=\"846\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2018\/07\/2018072406272837.png\" alt=\"\" class=\"aligncenter size-full wp-image-2253\" \/><\/a><\/p>\n<p>tvp \u5373 VSPW,<br \/>\ntvb \u5373 VBPD,<br \/>\ntvf \u5373 VFPD<br \/>\nthp \u5373 HSPW<br \/>\nthb \u5373 HBPD<br \/>\nthf \u5373 HFPD<\/p>\n<p>\u53c2\u8003\u7684\u65f6\u949f\u5c31\u662f CLK, \u4e00\u4e2a CLK \u65f6\u949f, \u5b8c\u6210\u4e00\u4e2a\u50cf\u7d20\u70b9\u7684\u663e\u793a.\u8ba1\u7b97\u5e27\u9891\u7387(\u5237\u65b0\u9891\u7387)\u7684\u65b9\u6cd5\u5c31\u662f\u6240\u6709\u7684\u50cf\u7d20\u70b9\u8ddf\u8fb9\u6cbf(\u8fb9\u6846,hbpd \u4e4b\u7c7b),\u540c\u6b65\u8109\u51b2\u7684\u65f6\u95f4\u76f8\u52a0, \u7ed3\u679c\u5c31\u662f\u663e\u793a\u5b8c\u6574\u4e00\u5e27\u6240\u9700\u65f6\u95f4, \u5176\u5012\u6570\u5373\u662f\u5e27\u9891\u7387.<\/p>\n<p> &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>LCD\u5373\u6db2\u6676\u663e\u793a\u5668\uff0c\u63a7\u5236\u539f\u7406\u662f\u63a7\u5236\u5176\u4e2d\u7684\u7535\u5b50\u67aa\uff0c\u5728n\u884c*n\u5217\u7684\u5c4f\u5e55\u4e0a\u6295\u5c04\u4e0d\u540c\u989c\u8272\u4ece\u800c\u5f62\u6210\u56fe\u50cf\u3002 \u7f16\u7a0b\u6b65\u9aa4\uff1a \u2460 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2242","post","type-post","status-publish","format-standard","hentry","category-life"],"_links":{"self":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2242","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2242"}],"version-history":[{"count":7,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2242\/revisions"}],"predecessor-version":[{"id":2255,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2242\/revisions\/2255"}],"wp:attachment":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2242"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}