{"id":2884,"date":"2019-11-12T03:45:35","date_gmt":"2019-11-12T03:45:35","guid":{"rendered":""},"modified":"2019-11-12T11:46:01","modified_gmt":"2019-11-12T03:46:01","slug":"%e5%9f%ba%e4%ba%8e%e5%b5%8c%e5%85%a5%e5%bc%8f%e7%b3%bb%e7%bb%9f%e7%9a%84%e7%bd%91%e7%bb%9c%e8%a7%86%e9%a2%91%e7%9b%91%e6%8e%a7%e7%b3%bb%e7%bb%9f%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2884","title":{"rendered":"\u57fa\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u7f51\u7edc\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u8bbe\u8ba1"},"content":{"rendered":"

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\n\t2\u3001\u7cfb\u7edf\u5b58\u50a8\u7535\u8def\u6a21\u5757<\/p>\n

\n\t\u4e3b\u63a7\u5668\u8fd8\u9700\u4e00\u4e9b\u5916\u56f4\u5b58\u50a8\u5355\u5143\u5982Nor Flash\u548cSDRAM\u3002Nor Flash \u4e2d\u5305\u542bLinux \u7684Bootloader\u3001\u7cfb\u7edf\u5185\u6838\u3001\u6587\u4ef6\u7cfb\u7edf\u3001\u5e94\u7528\u7a0b\u5e8f\u4ee5\u53ca\u73af\u5883\u53d8\u91cf\u548c\u7cfb\u7edf\u914d\u7f6e\u6587\u4ef6\u7b49\u7b49\uff0c\u540c\u65f6\u8fd8\u9884\u7559\u4e86\u4e00\u90e8\u5206\u7a7a\u95f4\u4f5c\u4e3a\u7528\u6237\u4f7f\u7528\uff1bSDRAM\u8bfb\u5199\u901f\u5ea6\u5feb\uff0c\u7cfb\u7edf\u8fd0\u884c\u65f6\u628a\u5b83\u4f5c\u4e3a\u5185\u5b58\u5355\u5143\u4f7f\u7528\u3002\u4e3a\u5145\u5206\u4fdd\u8bc1\u7cfb\u7edf\u7684\u53ef\u6269\u5145\u6027\uff0c\u7cfb\u7edf\u8bbe\u8ba1\u91c7\u7528\u4e868M\u7684Nor Flash\u548c64M\u7684SDRAM\u3002<\/p>\n

\n\t\u5728\u7f51\u7edc\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u7684\u8bbe\u8ba1\u4e2d\uff0cFlash\u7528\u4e8e\u5b58\u653e\u64cd\u4f5c\u7cfb\u7edf\u3001\u6587\u4ef6\u7cfb\u7edf\u548c\u9a71\u52a8\u7a0b\u5e8f\u7b49\uff1bSDRAM\u4e3b\u8981\u7528\u4f5c\u8fd0\u884c\u5d4c\u5165\u5f0f\u64cd\u4f5c\u7cfb\u7edf\u3001\u5e94\u7528\u670d\u52a1\u7a0b\u5e8f\u548c\u4e34\u65f6\u5b58\u653e\u89c6\u97f3\u9891<\/u>\u4fe1\u606f\u3002Flash\u5b58\u50a8\u5668\u9009\u7528\u7684\u662fSpansion\u7684S29AL016D70TF\u3002\u5b83\u662f\u4e00\u4e2a16 Mbit\u7684Flash\u5b58\u50a8\u5668\uff0c\u5bb9\u91cf\u4e3a2\uff0c097\uff0c152\u4e2a\u5b57\u8282\uff1b\u91c7\u752848\u811aTSOP\u5c01\u88c5\u548c3\uff0e0V\u7535\u6e90\u4f9b\u7535\u3002S29AL016D70TF\u4e0eHi3510\u7684\u63a5\u53e3\u8fde\u63a5\u6846\u56fe\u5982\u56fe3\u6240\u793a\u3002\u5176\u4e2d\u3002CE#\u7ba1\u811a\u4e3a\u82af\u7247\u4f7f\u80fd\u8f93\u5165\uff0c\u7531\u4e8e\u6b64Flash\u7528\u4e8e\u5b58\u50a8\u5f15\u5bfc\u7a0b\u5e8f\uff0c\u6545\u6b64\u5f15\u811a\u8fde\u63a5EBICSlN#\uff1bOE#\u7ba1\u811a\u4e3a\u8f93\u51fa\u4f7f\u80fd\u8f93\u5165\uff0c\u8fde\u63a5EBIOEN\uff1bRY\uff0fBY\u4e3a\u51c6\u5907\u6216\u5fd9\u8f93\u51fa\u7ba1\u811a\uff0c\u60ac\u7a7a\u3002<\/p>\n

\n\t\"\u57fa\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u7f51\u7edc\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u8bbe\u8ba1<\/p>\n

\n\t\u56fe3 Flash\u5b58\u50a8\u5668\u63a5\u53e3\u8bbe\u8ba1\u6846\u56fe<\/p>\n

\n\tSDRDM\u5b58\u50a8\u5668\u9009\u7528\u7684\u662fHynix\u7684HY57V281620ET\uff0c\u5b83\u7684\u5bb9\u91cf\u4f4d\u662f16MB\uff084Banks×2M×16bits\uff09\uff0c\u5355\u7247\u6570\u636e\u5bbd\u5ea6\u662f16\u4f4d\uff0c\u4e3a\u4e86\u589e\u5927\u6570\u636e<\/u>\u541e\u5410\u80fd\u529b\uff0c\u9009\u53d6\u4e24\u7247SDRAM\u6784\u621032\u4f4d\u5730\u5740\u5bbd\u5ea6\uff0c\u5b58\u50a8\u5bb9\u91cf\u4e3a32MB\u3002HY57V281620ET\u7684\u5de5\u4f5c\u7535\u538b\u4e3a3\uff0e3V\uff0c\u5e38\u89c1\u5c01\u88c5\u4e3a54\u811aTSOP\uff0c\u517c\u5bb9LVTTL\u63a5\u53e3\u3002\u652f\u6301\u81ea\u52a8\u5237\u65b0\uff08Auto-Refresh\uff09\u548c\u81ea\u5237\u65b0\uff08Self-Refresh\uff09\u3002HY57V281620ET\u4e0eHi3510\u7684\u63a5\u53e3\u8fde\u63a5\u6846\u56fe\u5982\u56fe4\u6240\u793a\u3002<\/p>\n

\n\t\"\u57fa\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u7f51\u7edc\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u8bbe\u8ba1<\/p>\n

\n\t\u56fe4 SDRDM\u5b58\u50a8\u5668\u63a5\u53e3\u8bbe\u8ba1\u6846\u56fe<\/p>\n

\n\t3\u3001\u89c6\u9891\u91c7\u96c6\u6a21\u5757\u8bbe\u8ba1<\/p>\n

\n\t\u89c6\u9891\u91c7\u96c6\u82af\u7247\u9009\u7528Philips\u516c\u53f8\u751f\u4ea7\u7684SAA7113H\uff0c\u5b83\u662f\u4e00\u6b3e\u529f\u80fd\u5f3a\u5927\u4e14\u64cd\u4f5c\u7b80\u5355\u76849\u4f4d\u89c6\u9891\u8f93\u5165\u5904\u7406\u82af\u7247\uff0c\u91c7\u7528CMOS\u5de5\u827a\uff0c\u901a\u8fc7I2C<\/u>\u603b\u7ebf\u4e0e\u5904\u7406\u5668\u6216DSP<\/u>\u8fde\u63a5\u53ef\u65b9\u4fbf\u5730\u6784\u6210\u5e94\u7528\u7cfb\u7edf\u3002\u5b83\u5185\u90e8\u5305\u542b\u56db\u8def\u6a21\u62df\u5904\u7406\u901a\u9053\uff0c\u53ef\u4ee5\u9009\u62e9\u89c6\u9891\u4fe1\u53f7\u6e90\u5e76\u53ef\u6297\u6df7\u53e0\u6ee4\u6ce2\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u8fdb\u884c\u6a21\u6570\u8f6c\u6362\u3001\u81ea\u52a8\u7b9d\u4f4d\u3001\u81ea\u52a8\u589e\u76ca\u63a7\u5236\uff08AGC\uff09\u3001\u65f6\u949f<\/u>\u4ea7\u751f\uff08CGC\uff09\u3001\u591a\u5236\u5f0f\u89e3\u7801\uff0c\u53e6\u5916\u8fd8\u53ef\u4ee5\u5bf9\u4eae\u5ea6\u3001\u5bf9\u6bd4\u5ea6\u548c\u9971\u548c\u5ea6\u8fdb\u884c\u63a7\u5236\u3002\u8bbe\u7f6eSAA7113H\u82af\u7247\u7684\u5de5\u4f5c\u65f6\u949f\u4e3a24\uff0e576MHz\uff0c\u6570\u636e\u8f93\u51fa\u683c\u5f0f\u4e3a4\uff1a2\uff1a2\uff0c\u5e27\u9891\u4e3a25fps\u3002\u89c6\u9891\u91c7\u96c6\u82af\u7247SAA7113H\u5728\u4e0a\u7535\u540e\uff0c\u5e76\u4e0d\u662f\u7acb\u5373\u91c7\u96c6\u6a21\u62df\u89c6\u9891\u4fe1\u53f7\u8fdb\u884cA\uff0fD\u8f6c\u6362\uff0c\u5b83\u5fc5\u987b\u7531Hi3510\u901a\u8fc7I2C\u603b\u7ebf\u5bf9\u5176\u5185\u90e8\u5bc4\u5b58\u5668\u8fdb\u884c\u521d\u59cb\u5316\u8bbe\u7f6e\u540e\uff0c\u624d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002\u89c6\u9891\u91c7\u96c6\u82af\u7247SAA7113H\u4e0eHi3510\u7684\u63a5\u53e3\u8fde\u63a5\u6846\u56fe\u5982\u56fe5\u6240\u793a\u3002<\/p>\n

\n\t\"\u57fa\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u7f51\u7edc\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u8bbe\u8ba1<\/p>\n

\n\t\u56fe5\u89c6\u9891\u91c7\u96c6\u7535\u8def\u539f\u7406\u6846\u56fe<\/p>\n

\n\t4\u3001\u5916\u56f4\u7535\u8def\u6a21\u5757<\/p>\n

\n\t\u672c\u8bbe\u8ba1\u7528\u5230\u7684\u5916\u8bbe\u6709USB<\/u>\u63a5\u53e3\uff0c\u7f51\u5361\u63a5\u53e3\uff0c\u4e32\u884c\u63a5\u53e3\u548cJTAG\u63a5\u53e3\u3002\u540c\u65f6\u4e3a\u4fdd\u8bc1\u7cfb\u7edf\u5c06\u6765\u7684\u53ef\u6269\u5c55\u6027\uff0c\u7cfb\u7edf\u8fd8\u9884\u7559\u4e86PC104\u63a5\u53e3\u548c\u5927\u91cf\u7684GPIO\u63a5\u53e3\u3002AT91RM9200\u5904\u7406\u5668\u7684\u7247\u5185\u4ee5\u592a\u7f51\u5361\u7aef\u53e3\u548c\u7f51\u7edc\u7269\u7406\u5c42\u82af\u7247DM9161E \u7684MI<\/u>I \u63a5\u53e3\u901a\u4fe1\u3002\u800c\u4e14\u7247\u5185\u4ee5\u592a\u7f51\u5361\u5185\u7f6e\u4e86\u72ec\u7acb\u7684\u53cc\u7f13\u51b2\u7684\u8bfb\u5199DMA<\/u> \u901a\u9053\uff0c\u8fd9\u6837\u5927\u5927\u63d0\u4f9b\u4e86\u6570\u636e\u7684\u53d1\u9001\u901f\u5ea6\uff0c\u540c\u65f6\u4e0d\u5f71\u54cdAT91RM9200 \u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n

\n\t\u4e3a\u4fdd\u8bc1\u89c6\u9891\u91c7\u96c6\u8d28\u91cf\uff0c\u76d1\u63a7\u7cfb\u7edf\u9009\u7528\u4e86\u7f57\u6280\u7b49\u9ad8\u7aef\u54c1\u724c\u7684\u4ea7\u54c1\uff0c\u7136\u540e\u6444\u50cf\u5934\u901a\u8fc7\u4e13\u7528\u7684USB\u96c6\u7ebf\u5668\u4e0e\u5904\u7406\u5668\u5355\u5143\u7684USB\u63a5\u53e3\u8fde\u63a5\u3002\u5728\u5b9e\u65f6\u76d1\u63a7\u72b6\u6001\u4e0b\uff0c\u5404\u4e2a\u6444\u50cf\u5934\u4e0a\u6355\u83b7\u7684\u56fe\u50cf\u6570\u636e\u901a\u8fc7USB\u96c6\u7ebf\u5668\u4f20\u8f93\u5230\u89c6\u9891\u76d1\u63a7\u7cfb\u7edf\u7684USB\u4e3b\u63a7\u5236\u5668\u6a21\u5757\u4e0a\uff0c\u7136\u540e\u518d\u7531USB\u4e3b\u63a7\u5236\u5668\u6a21\u5757\u4ea4\u7531AT91RM9200\u5904\u7406\u5668\u96c6\u4e2d\u5904\u7406\u3002AT91RM9200\u5bf9\u91c7\u96c6\u5230\u7684\u56fe\u50cf\u8fdb\u884c\u5b9e\u65f6\u7f16\u7801\u538b\u7f29\uff0c\u7f16\u7801\u4e4b\u540e\u7684\u7801\u6d41\u76f4\u63a5\u4f20\u8f93\u5230\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\uff0c\u7b49\u5019\u53d1\u9001\u3002\u6700\u540e\u7531\u4e0a\u5c42\u5e94\u7528\u7a0b\u5e8f\u5c06\u5904\u7406\u540e\u7684\u89c6\u9891\u6570\u636e\u901a\u8fc7\u4ee5\u592a\u7f51\u53e3\u8fdb\u884c\u53d1\u9001\u3002<\/p>\n

\n\t\u56db\u3001\u8f6f\u4ef6\u65b9\u6848<\/p>\n

\n\t\u7cfb\u7edf\u7684\u5e94\u7528\u8f6f\u4ef6\u5efa\u7acb\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u4e0a\uff0c\u5d4c\u5165\u5f0fLinux\u5177\u6709\u8bb8\u591a\u4f18\u70b9\uff0c\u5982\u5f00\u653e\u6e90\u7801\uff0c\u529f\u80fd\u5f3a\u5927\u7684\u5185\u6838\uff0c\u652f\u6301\u591a\u7528\u6237\u3001\u591a\u7ebf\u7a0b\u3001\u591a\u8fdb\u7a0b\u3001\u5b9e\u65f6\u6027\u597d\u3001\u529f\u80fd\u5f3a\u5927\u7a33\u5b9a\uff1b\u5927\u5c0f\u529f\u80fd\u53ef\u5b9a\u5236\u7b49\u3002\u672c\u7cfb\u7edf\u91c7\u7528\u7684\u5d4c\u5165\u5f0fLinux\u7cfb\u7edf\u662f\u57fa\u4e8e2.6.21\u7684\u5185\u6838\uff0c\u652f\u6301\u4e86\u5185\u6838\u62a2\u5360\u5f0f\u8c03\u5ea6\uff0c\u540c\u65f6\u8c03\u5ea6\u5468\u671f\u4e3a1ms\uff0c\u56e0\u6b64\u5927\u5927\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u7684\u5b9e\u65f6\u6027\u3002\u6b64\u5916\uff0c\u7cfb\u7edf\u5185\u5d4c\u7684\u5d4c\u5165\u5f0fLinux\u7cfb\u7edf\u5b9e\u73b0\u4e86\u5bf9\u6240\u6709\u786c\u4ef6\u8bbe\u5907\u7684\u9a71\u52a8\u652f\u6301\uff0c\u5982\u57fa\u4e8eFlash\u7684\u6587\u4ef6\u7cfb\u7edf\u3001\u7f51\u5361\u9a71\u52a8\u7a0b\u5e8f\u3001USB\u9a71\u52a8\u7a0b\u5e8f\u7b49\u7b49\uff0c\u5b8c\u5168\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u7684\u53ef\u7528\u6027\u3002<\/p>\n

\n\t\u5728\u672c\u7cfb\u7edf\u4e2d\uff0c\u8f6f\u4ef6\u8bbe\u8ba1\u53ef\u5206\u4e3a3\u90e8\u5206\uff1a\u89c6\u9891\u56fe\u50cf\u6570\u636e\u91c7\u96c6<\/u>\u3001\u56fe\u50cf\u6570\u636e\u7684JPEG\u538b\u7f29\u4ee5\u53ca\u7cfb\u7edf\u5e73\u53f0\u7684\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n

\n\t1\u3001\u89c6\u9891\u56fe\u50cf\u6570\u636e\u91c7\u96c6\u7684\u5b9e\u73b0<\/p>\n

\n\t\u9996\u5148\u52a0\u8f7dUSB\u6444\u50cf\u5934\u9a71\u52a8\u7a0b\u5e8f\uff0c\u63a5\u7740\u5c31\u662f\u7f16\u5199\u4e00\u4e2a\u5bf9\u89c6\u9891\u6d41\u91c7\u96c6\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u6444\u50cf\u5934\u4e2d\u7684\u5404\u79cdI\uff0fO\u53e3\u7684\u63a7\u5236\u4e3b\u8981\u4f9d\u9760Vide04L<\/u>inux\u63d0\u4f9b\u7684\u5e94\u7528\u7a0b\u5e8f\u63a5\u53e3\u51fd\u6570\u5b9e\u73b0\uff0c\u4e3b\u8981\u6709Open\u3001Read\u3001Write<\/u>\u7b49\u3002V4L\u4e0b\u7684\u89c6\u9891\u91c7\u96c61\u3002\u5728\u672c\u7cfb\u7edf\u4e2d\uff0c\u5c06\u6709\u5173\u6444\u50cf\u5934\u7684\u5404\u79cd\u6570\u636e\u548c\u7ed3\u6784\u5c01\u88c5\u6210\u4e86\u4e00\u4e2a\u7c7b\uff0c\u4e3b\u8981\u7528\u5230\u7684\u4e00\u4e9b\u7cfb\u7edf\u8c03\u7528\u51fd\u6570\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n

\n\topen\uff08“\uff0fdev\uff0fvide00”\uff0cO—RDWR\uff09\uff1a\u8bbe\u5907\u7684\u6253\u5f00\u3002<\/p>\n

\n\tclose\uff08fd\uff09\uff1a\u8bbe\u5907\u7684\u5173\u95ed\u3002<\/p>\n

\n\tmmap\uff08void+addr\uff0csize—t len\uff0cint prot\uff0cint flags\uff0cint fd\uff0coff__t offset\uff09\uff1a<\/p>\n

\n\t\u8bbe\u5907\u7f13\u51b2\u533a\u5230\u5185\u5b58\u7a7a\u95f4\u7684\u6620\u5c04\u3002<\/p>\n

\n\tmunmap\uff08void*addr\uff0csize t len\uff09\uff1a\u91c7\u96c6\u5de5\u4f5c\u7ed3\u675f\u540e\u53d6\u6d88mmap\u548cmbuf\u7684\u7ed1\u5b9a\u3002<\/p>\n

\n\tioctl\uff08int Rl\uff0cjnt cmd\uff0e\uff0e\uff0e\uff0c\uff09\uff1a\u63a7\u5236I\/O<\/u>\u7684\u901a\u9053\u3002<\/p>\n

\n\t2\u3001Linux\u4e0b\u56fe\u8c61\u6570\u636e\u7684JPEG\u538b\u7f29<\/p>\n

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