{"id":2515,"date":"2019-06-12T11:33:10","date_gmt":"2019-06-12T03:33:10","guid":{"rendered":"http:\/\/www.51cos.com\/?p=2515"},"modified":"2019-06-12T11:39:08","modified_gmt":"2019-06-12T03:39:08","slug":"lcd%e7%82%b9%e5%b1%8f%e6%9d%82%e8%ae%b0","status":"publish","type":"post","link":"http:\/\/www.51cos.com\/?p=2515","title":{"rendered":"LCD\u70b9\u5c4f\u8fc7\u7a0b\u8bb0\u5f55"},"content":{"rendered":"<p>\u672c\u6587\u6765\u6e90\uff1ahttps:\/\/blog.csdn.net\/LinuxArmbiggod\/article\/details\/83277035<\/p>\n<pre class=\"lang:default decode:true \">LCD\u624b\u518c\u5173\u952e\u4fe1\u606f\u63d0\u53d6<br \/>\n\u5728\u770bLCD\u6570\u636e\u624b\u518c\u65f6\u5019\u4e3b\u8981\u5173\u6ce8\u5982\u4e0b\u4e24\u90e8\u5206\u4fe1\u606f\uff1a<br \/>\n\u884c\u573a\u63a7\u5236LCD\u65f6\u5e8f\u56fe<br \/>\n\u65f6\u5e8f\u53c2\u6570<\/p>\n<p>\u5c4f\u65f6\u5e8f\u4fe1\u53f7\uff1a<br \/>\nVCLK \uff1a\u50cf\u7d20\u65f6\u949f\u4fe1\u53f7\uff08\u7528\u4e8e\u9501\u5b58\u56fe\u50cf\u6570\u636e\u7684\u50cf\u7d20\u65f6\u949f\uff09<br \/>\nHSYNC\uff1a\u884c\u540c\u6b65\u4fe1\u53f7 \uff08\u4ee3\u8868\u65b0\u7684\u4e00\u884c\u56fe\u50cf\u6570\u636e\u5f00\u59cb\u53d1\u9001\uff09<br \/>\nVSYNC\uff1a\u5e27\u540c\u6b65\u4fe1\u53f7 \uff08\u4ee3\u8868\u65b0\u7684\u4e00\u5c4f\u56fe\u50cf\u6570\u636e\u5f00\u59cb\u53d1\u9001\uff09<br \/>\nVDEN: \u6570\u636e\u6709\u6548\u6807\u5fd7\u4f4d<br \/>\nVD : \u56fe\u50cf\u6570\u636e\u4fe1\u53f7<br \/>\n\u6ce8\u610f\uff1a\u5728\u5e27\u540c\u6b65\u548c\u884c\u540c\u6b65\u64cd\u4f5c\u7684\u5934\u5c3e\u90fd\u5fc5\u987b\u7559\u6709\u56de\u626b\u65f6\u95f4\u3002\u8fd9\u6837\u7684\u65f6\u5e8f\u5b89\u6392\u7528\u4e8e\u663e\u793a\u5668\u7535\u5b50\u67aa\u504f\u8f6c\u6240\u9700\u8981\u7684\u65f6\u95f4\u3002<\/p>\n<p>\u5173\u952e\u65f6\u5e8f\u53c2\u6570\u8bf4\u660e\uff1a<br \/>\n\u4e0a\u8fb9\u754c\uff1aUpper margin, vertical back porch<br \/>\n\u4e0b\u8fb9\u754c\uff1aLow margin, vertical front porch<br \/>\n\u5de6\u8fb9\u754c : left margin, horizontal back porch<br \/>\n\u53f3\u8fb9\u754c\uff1aright margin,horizontal front porch<br \/>\n\u6c34\u5e73\u540c\u6b65\uff1a hsync,horizontal pulse width<br \/>\n\u5782\u76f4\u540c\u6b65\uff1avsync, vertical pulse width<br \/>\n\u6a2a\u5411\u5206\u8fa8\u7387: xres, Horizontal valid data<br \/>\n\u7eb5\u5411\u5206\u8fa8\u7387\uff1ayres, vertical valid data <\/p>\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/>\nhback-porch  (HBP)\uff1a\u884c\u4fe1\u53f7\u5de6\u8fb9\u6cbf\u65e0\u6548\u4fe1\u53f7\u65f6\u95f4\u8303\u56f4<br \/>\nhfront-porch  (HFP)\uff1a \u884c\u4fe1\u53f7\u53f3\u8fb9\u6cbf\u65e0\u6548\u4fe1\u53f7\u65f6\u95f4\u8303\u56f4<br \/>\nhsync-len (HPW)\uff1a \u884c\u4fe1\u53f7\u7535\u5b50\u67aa\u56de\u626b\u65f6\u95f4  \u5373 \u6c34\u5e73\u540c\u6b65\u65f6\u95f4 Hsyc<br \/>\nvback-porch(VBP) \uff1a\u5e27\u4fe1\u53f7\u4e0a\u8fb9\u6cbf\u65e0\u6548\u4fe1\u53f7\u65f6\u95f4\u8303\u56f4<br \/>\nvfront-porch(VFP)\uff1a\u5e27\u4fe1\u53f7\u4e0b\u8fb9\u6cbf\u65e0\u6548\u4fe1\u53f7\u65f6\u95f4\u8303\u56f4<br \/>\nvsync-len(VPW)\uff1a\u5e27\u4fe1\u53f7\u7535\u5b50\u67aa\u56de\u626b\u65f6\u95f4 \u5373\u5782\u76f4\u540c\u6b65\u65f6\u95f4 Vsync<br \/>\nhactive(HVD)\uff1a\u6709\u6548\u50cf\u7d20\u4fe1\u53f7\u7eb5\u5411\u5206\u8fa8\u7387<br \/>\nvactive(VVD)\uff1a\u6709\u6548\u50cf\u7d20\u4fe1\u53f7\u6a2a\u5411\u5206\u8fa8\u7387<\/p>\n<p>\u5e76\u4e14\u6ee1\u8db3\u5982\u4e0b\u5173\u7cfb\uff1a<br \/>\nLeft_margin + right_margin + hsync + xres = horizontal period \uff08\u6c34\u5e73\u4fe1\u53f7\u603b\u5468\u671f\uff09<br \/>\nUpper_margin + low_margin + hsync + yres = vertical period \uff08\u5782\u76f4\u4fe1\u53f7\u603b\u5468\u671f\uff09<\/p>\n<p>\u5173\u4e8e\u50cf\u7d20\u65f6\u949f\u548clane\u4f20\u8f93\u901f\u7387\u7684\u8ba1\u7b97<br \/>\n\u50cf\u7d20\u65f6\u949f\uff1aclock-frequency \u5373DCLK(dotc clock), PCLK(pixel clock).<br \/>\nclock-frequency = (h_active + hfp + hbp + h_sync) * (v_active + vfp + vbp + v_sync) * fps<br \/>\n\t\t        = \u6c34\u5e73\u4fe1\u53f7\u603b\u5468\u671f*\u5782\u76f4\u4fe1\u53f7\u603b\u5468\u671f*\u5e27\u7387<br \/>\n fps\u4e3a\u5e27\u7387\uff0c\u4e00\u822c\u4e3a60\uff0c\u8868\u793a\u6bcf\u79d2\u5237\u65b060\u5e27\u56fe\u50cf<\/p>\n<p>lane\u4f20\u8f93\u901f\u7387\uff1a\u8868\u793a\u4e00\u6761\u6570\u636e lane \u7684\u4f20\u8f93\u901f\u7387,\u5355\u4f4d\u4e3a Mbits\/s<br \/>\nlane_clk = 100 + H_total\u00d7V_total \u00d7 fps \u00d7 3 \u00d7 8 \/ lanes_nums<br \/>\ntotal \u8fd9\u91cc\u6307\u7684\u662f \u6c34\u5e73 \u5782\u76f4\u4fe1\u53f7\u603b\u5468\u671f<br \/>\nfps \u4e3a\u5e27\u7387 \u53d660<br \/>\n3 \u00d7 8 \u4ee3\u8868\u4e00\u4e2a RGB \u4e3a 3 \u4e2a\u5b57\u8282\uff0c\u6bcf\u4e2a\u5b57\u8282 8 bit<br \/>\nlanes \u4ee3\u8868 data \u901a\u9053\u6570<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2522\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/1.png\" alt=\"\" width=\"665\" height=\"449\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2523\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/2.png\" alt=\"\" width=\"725\" height=\"447\" \/><\/a><\/p>\n<p>\u5982\u4e0b\u4e3a\u5178\u578b\u7684LCD\u6570\u636e\u624b\u518c\u5173\u952e\u4fe1\u606f:<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2524\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/3.png\" alt=\"\" width=\"612\" height=\"406\" \/><\/a><\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4ece\u4e0a\u9762\u6570\u636e\u4fe1\u606f\u4e2d\u63d0\u53d6\u5982\u4e0b\u4fe1\u606f\uff1a\u8be5\u4ea7\u54c1\u53ef\u4ee5\u7528DE\u548cSYNC\u4e24\u79cd\u6a21\u5f0f\u53bb\u9a71\u52a8\uff0c\u6211\u4eec\u5e38\u7528SYNC\uff0c\u4e5f\u6709\u4e00\u4e9b\u4ea7\u54c1\u53ea\u652f\u6301DE\u6a21\u5f0f\uff0c\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u5728\u4e0b\u9762\u8be6\u8bf4\u3002<\/p>\n<p>\u5728SYNC\u6a21\u5f0f\u4e0b\uff0c\u4e0a\u9762\u6240\u5c5e\u7684LCDC\u5173\u952e\u4fe1\u606f\u90fd\u4f1a\u63d0\u4f9b\u51fa\u6765\uff0c\u6211\u4eec\u76f4\u63a5\u7528\u5c31\u53ef\u4ee5\uff0c\u4f46\u662f\u5728DE\u6a21\u5f0f\u4e0b\uff0c\u4e00\u822c\u4e0d\u4f1a\u544a\u8bc9 HFP,HBP,VFP,VBP,HSYNC,VSYNC\u8fd9\u4e9b\u53c2\u6570\uff0c\u800c\u662f\u76f4\u63a5\u7ed9\u51faHorizontal blank time\u548cVertical blank time \uff08\u5982\u4e0a\u8868\uff09\u6216\u8005\u76f4\u63a5\u7ed9\u51fa\u6c34\u5e73\u4fe1\u53f7\u548c\u5782\u76f4\u4fe1\u53f7\u7684\u603b\u5468\u671f\u4ee5\u53ca\u6c34\u5e73\u5782\u76f4\u4fe1\u53f7\u6709\u6548\u5468\u671f\uff0c\u5176\u4f59\u7684\u53c2\u6570\u9700\u8981\u6211\u4eec\u81ea\u5df1\u8ba1\u7b97\u3002<\/p>\n<p>\u5728DE\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u6ca1\u6709\u660e\u786e\u8868\u660e HFP,HBP,VFP,VBP,HSYNC,VSYNC \u7b49\u53c2\u6570\u7684\u65f6\u5019\uff0c\u8ba1\u7b97\u8fd9\u4e9b\u53c2\u6570\u65f6\u5019\uff0c\u5c3d\u91cf\u6ee1\u8db3\u5982\u4e0b\u5173\u7cfb\u5373\u53ef\uff1a<\/p>\n<p>HFP+HBP+HSYNC = Horizontal blank time<\/p>\n<p>VFP+VBP+VSYNC = Vertical blank time<\/p>\n<p>hspw(hsync)+hbp+col+hfp=total<\/p>\n<p>vspw(vsync)+vbp+row+vfp=total<\/p>\n<p>\u4e00\u822c HSYNC\u548cVSYNC\u53d6 4 \u6216 1 \u6216 0 \u5269\u4e0b\u7684 XFX XBX\u81ea\u884c\u5206\u914d(\u901a\u5e38hbp\u548cvbp\u53d6\u8f83\u5927\u503c)\u3002\u5982\uff1a<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/4.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2525\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/4.png\" alt=\"\" width=\"893\" height=\"373\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0a\u56fe\u4e2d\uff0cVertical section blanking=42, Horizontal section blanking=204,\u5728\u586b\u51456\u4e2a\u53c2\u6570\u65f6\u53ea\u9700\u8981\u6ee1\u8db3\u5173\u7cfb\uff1avbp+vfp+vs=42,hbp+hfp+hs=204,\u5404\u503c\u81ea\u884c\u5206\u914d(\u901a\u5e38hbp\u548cvbp\u53d6\u8f83\u5927\u503c),\u4f8b\u5982<\/p>\n<p>hback-porch = &lt;150&gt;;<\/p>\n<p>hfront-porch = &lt;50&gt;;<\/p>\n<p>vback-porch = &lt;30&gt;;<\/p>\n<p>vfront-porch = &lt;11&gt;;<\/p>\n<p>hsync-len = &lt;4&gt;;<\/p>\n<p>vsync-len = &lt;1&gt;;<\/p>\n<p>\u5982\u4e0b \u4e3a DE \u6a21\u5f0f\u4e3e\u4f8b:<\/p>\n<p><a href=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/5.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2526\" src=\"http:\/\/www.51cos.com\/wp-content\/uploads\/2019\/06\/5.png\" alt=\"\" width=\"890\" height=\"301\" \/><\/a><\/p>\n<p>\u53ef\u77e5\uff1a<\/p>\n<p>xres = 1024\u00a0 yres = 600<\/p>\n<p>\u6c34\u5e73\u5468\u671f = 1344<\/p>\n<p>\u5782\u76f4\u5468\u671f = 635<\/p>\n<p>\u5de6\u8fb9\u8ddd\u7a7a\u767d+\u53f3\u8fb9\u8ddd\u7a7a\u767d+\u6c34\u5e73\u540c\u6b65\u65f6\u95f4 = 320<\/p>\n<p>\u4e0a\u8fb9\u8ddd\u7a7a\u767d+\u4e0b\u8fb9\u8ddd\u7a7a\u767d+\u5782\u76f4\u540c\u6b65\u65f6\u95f4 = 35<\/p>\n<p>\u800cDEH period time\uff1a DE Horizontal blank time<\/p>\n<p>Horizontal blank time = HFP+HBP+HSYNC :\u5de6\u8fb9\u8ddd\u7a7a\u767d+\u53f3\u8fb9\u8ddd\u7a7a\u767d+\u6c34\u5e73\u540c\u6b65\u65f6\u95f4<\/p>\n<p>DEV period time : DE Vertical blank time<\/p>\n<p>Vertical blank time = VFP+VBP+VSYNC \uff1a\u4e0a\u8fb9\u8ddd\u7a7a\u767d+\u4e0b\u8fb9\u8ddd\u7a7a\u767d+\u5782\u76f4\u540c\u6b65\u65f6\u95f4<\/p>\n<p>\u6240\u4ee5\u731c\u6d4b\uff1a<\/p>\n<p>HSYNC = 4<\/p>\n<p>VSYNC = 1<\/p>\n<p>\u901a\u5e38hbp\u548cvbp\u53d6\u8f83\u5927\u503c<\/p>\n<p>HFP + HBP = 320-4<\/p>\n<p>VFP + VBP = 35-1<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u6765\u6e90\uff1ahttps:\/\/blog.csdn.net\/LinuxArmbiggod\/article\/detai [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2515","post","type-post","status-publish","format-standard","hentry","category-embedded"],"_links":{"self":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2515","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=2515"}],"version-history":[{"count":4,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2515\/revisions"}],"predecessor-version":[{"id":2529,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/2515\/revisions\/2529"}],"wp:attachment":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2515"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}