{"id":123460,"date":"2026-11-07T10:41:10","date_gmt":"2026-11-07T02:41:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/123460.html"},"modified":"2026-11-07T10:41:10","modified_gmt":"2026-11-07T02:41:10","slug":"51-%e5%8d%95%e7%89%87%e6%9c%ba%e9%a9%b1%e5%8a%a8%e5%9b%9b%e4%bd%8d%e6%95%b0%e7%a0%81%e7%ae%a1%ef%bc%9a%e5%8a%a8%e6%80%81%e6%89%ab%e6%8f%8f%e3%80%81%e9%99%90%e6%b5%81%e7%94%b5%e9%98%bb%e4%b8%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/123460.html","title":{"rendered":"51 \u5355\u7247\u673a\u9a71\u52a8\u56db\u4f4d\u6570\u7801\u7ba1\uff1a\u52a8\u6001\u626b\u63cf\u3001\u9650\u6d41\u7535\u963b\u4e0e\u6d88\u5f71\u7684\u53d6\u820d"},"content":{"rendered":"

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\u4e00\u3001\u5148\u628a\u5171\u9634\u5171\u9633\u548c\u6bb5\u7801\u5b9a\u6b7b<\/h3>\n

\u6570\u7801\u7ba1\u672c\u8d28\u5c31\u662f 8 \u4e2a LED（7 \u6bb5\u52a0\u4e00\u4e2a\u5c0f\u6570\u70b9）\u5171\u7528\u4e00\u7aef\u3002\u5171\u9633\u662f 8 \u4e2a LED \u7684\u9633\u6781\u8fde\u5728\u4e00\u8d77，\u516c\u5171\u7aef\u63a5\u9ad8\u7535\u5e73，\u54ea\u4e00\u6bb5\u7684\u9634\u6781\u88ab\u62c9\u4f4e，\u54ea\u4e00\u6bb5\u5c31\u4eae；\u5171\u9634\u6b63\u597d\u53cd\u8fc7\u6765\u3002<\/p>\n

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\/\/ \u5171\u9633\u6570\u7801\u7ba1\u6bb5\u7801，bit \u987a\u5e8f dp g f e d c b a，0 \u8868\u793a\u8be5\u6bb5\u70b9\u4eae
\ncode unsigned char SEG[] = {
\n 0xC0, \/\/ 0
\n 0xF9, \/\/ 1
\n 0xA4, \/\/ 2
\n 0xB0, \/\/ 3
\n 0x99, \/\/ 4
\n 0x92, \/\/ 5
\n 0x82, \/\/ 6
\n 0xF8, \/\/ 7
\n 0x80, \/\/ 8
\n 0x90, \/\/ 9
\n 0xFF \/\/ \u5168\u706d
\n};<\/p>\n

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\u4e8c\u3001\u52a8\u6001\u626b\u63cf\u7684\u65f6\u95f4\u8d26<\/h3>\n

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12MHz \u6676\u632f\u300112T \u6a21\u5f0f\u4e0b，\u4e00\u4e2a\u673a\u5668\u5468\u671f\u662f 1\u00b5s，1ms \u9700\u8981 1000 \u4e2a\u8ba1\u6570，\u5b9a\u65f6\u5668 16 \u4f4d\u6a21\u5f0f\u521d\u503c\u5c31\u662f 65536 – 1000 = 64536 = 0xFC18\u3002<\/p>\n

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I = (5 \u2212 1.8) \/ R<\/p>\n

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100\u03a9<\/td>\n\u7ea6 32mA<\/td>\n\u7ea6 256mA<\/td>\n\u5df2\u8fdc\u8d85\u666e\u901a IO \u80fd\u529b，\u5fc5\u987b\u5916\u52a0\u9a71\u52a8<\/td>\n<\/tr>\n
220\u03a9<\/td>\n\u7ea6 14.5mA<\/td>\n\u7ea6 116mA<\/td>\n\u9700 74HC245 \u7b49\u7f13\u51b2，\u4e0d\u80fd\u76f4\u8fde P0<\/td>\n<\/tr>\n
330\u03a9<\/td>\n\u7ea6 9.7mA<\/td>\n\u7ea6 78mA<\/td>\n\u52a0\u4e09\u6781\u7ba1\u4f4d\u9009\u540e\u7684\u5e38\u7528\u503c<\/td>\n<\/tr>\n
470\u03a9<\/td>\n\u7ea6 6.8mA<\/td>\n\u7ea6 54mA<\/td>\n\u5149\u7ebf\u6697\u7684\u73af\u5883，\u4f18\u5148\u4fdd IO \u5b89\u5168<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u91cc\u8981\u7279\u522b\u6ce8\u610f：\u8868\u91cc\u662f\u5cf0\u503c\u7535\u6d41，\u4e0d\u662f\u5e73\u5747\u7535\u6d41\u3002\u52a8\u6001\u626b\u63cf\u6bcf\u4f4d\u53ea\u4eae 1\/4 \u65f6\u95f4，\u4eba\u773c\u770b\u5230\u7684\u662f\u5e73\u5747\u4eae\u5ea6，\u6240\u4ee5\u5f88\u5bb9\u6613\u4e3a\u4e86\u300c\u66f4\u4eae\u300d\u628a\u7535\u963b\u4e00\u8def\u6539\u5c0f，\u5cf0\u503c\u7535\u6d41\u6084\u6084\u5c31\u8d8a\u8fc7\u4e86 IO \u7684\u4e0a\u9650\u3002P0 \u5355\u4e2a\u811a\u7684\u704c\u7535\u6d41\u3001\u6574\u7ec4 8 \u4e2a\u811a\u540c\u65f6\u704c\u7535\u6d41，\u624b\u518c\u91cc\u90fd\u6709\u660e\u786e\u4e0a\u9650，\u800c\u4e14 STC89C52 \u548c AT89C52 \u7ed9\u7684\u6570\u503c\u5e76\u4e0d\u5b8c\u5168\u4e00\u6837，\u4e00\u5b9a\u8981\u67e5\u81ea\u5df1\u624b\u4e0a\u90a3\u9897\u7684\u624b\u518c\u3002\u4e0d\u80fd\u62ff\u300c\u6211\u8bd5\u4e86\u6ca1\u70e7\u300d\u5f53\u4f9d\u636e\u2014\u2014IO \u662f\u6162\u6162\u52a3\u5316\u7684，\u5f53\u65f6\u4e0d\u574f\u4e0d\u4ee3\u8868\u6ca1\u4e8b\u3002<\/p>\n

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\u4e24\u79cd\u65b9\u6848\u7684\u5dee\u522b\u53ef\u4ee5\u8fd9\u6837\u5bf9\u7167：<\/p>\n\n\u65b9\u6848\u9650\u6d41\u4f4d\u7f6e\u4eae\u5ea6\u4e00\u81f4\u6027IO \u8d1f\u62c5\u5143\u4ef6\u6570\u91cf<\/tr>\n\n\n\n\n
\u4f4d\u7535\u963b\u76f4\u9a71<\/td>\n\u516c\u5171\u7aef 4 \u4e2a<\/td>\n\u5dee，\u968f\u663e\u793a\u6bb5\u6570\u53d8\u5316<\/td>\n\u5927<\/td>\n\u5c11<\/td>\n<\/tr>\n
\u6bb5\u7535\u963b + \u4e09\u6781\u7ba1\u4f4d\u9009<\/td>\n\u6bcf\u6bb5 32 \u4e2a<\/td>\n\u597d<\/td>\n\u5c0f<\/td>\n\u591a<\/td>\n<\/tr>\n
\u6bb5\u7535\u963b + 74HC245<\/td>\n\u6bcf\u6bb5 32 \u4e2a<\/td>\n\u597d<\/td>\n\u5c0f<\/td>\n\u4e2d\u7b49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u56db\u3001\u6d88\u5f71：\u987a\u5e8f\u9519\u4e86\u5c31\u6709\u6b8b\u5f71<\/h3>\n

\u52a8\u6001\u626b\u63cf\u5207\u6362\u4f4d\u7684\u65f6\u5019，\u5982\u679c\u5148\u9001\u65b0\u6bb5\u7801\u3001\u518d\u5173\u65e7\u4f4d，\u65e7\u4f4d\u8fd8\u4eae\u7740\u7684\u90a3\u4e00\u77ac\u95f4\u5c31\u4f1a\u628a\u65b0\u6bb5\u7801\u663e\u793a\u51fa\u6765，\u5f62\u6210\u4e0a\u4e00\u6bb5\u7684\u300c\u5f71\u5b50\u300d\u3002\u8fd9\u4e2a\u73b0\u8c61\u5728\u663e\u793a\u53d8\u5316\u5feb\u7684\u6570\u5b57\u4e0a\u6700\u660e\u663e，\u6bd4\u5982\u79d2\u8868\u3002<\/p>\n

\u6b63\u786e\u987a\u5e8f\u53ea\u6709\u4e09\u6b65，\u800c\u4e14\u4e0d\u80fd\u6362：\u5148\u5173\u6240\u6709\u4f4d\u9009 \u2192 \u518d\u9001\u6bb5\u7801 \u2192 \u6700\u540e\u6253\u5f00\u5f53\u524d\u4f4d\u3002<\/p>\n

P2 |= 0x0F; \/\/ 1. \u5173\u95ed\u5168\u90e8\u4f4d\u9009，\u6d88\u5f71
\nP0 = SEG[disp_buf[scan_idx]]; \/\/ 2. \u9001\u65b0\u6bb5\u7801
\nP2 &= ~(1 << scan_idx); \/\/ 3. \u6253\u5f00\u5f53\u524d\u4f4d<\/p>\n

P0 \u4e0a\u7684\u62c9\u9ad8\u6392\u963b\u548c\u300c\u5148\u5173\u4f4d\u300d\u8fd9\u4e24\u4ef6\u4e8b\u662f\u914d\u5408\u7684：\u5148\u5173\u4f4d\u4fdd\u8bc1\u65e7\u6bb5\u7801\u4e0d\u4f1a\u6f0f\u5230\u65b0\u4f4d，\u4e0a\u62c9\u4fdd\u8bc1\u706d\u6389\u7684\u6bb5\u771f\u7684\u706d\u5e72\u51c0\u3002\u4e24\u4e2a\u90fd\u505a\u5230，\u6b8b\u5f71\u57fa\u672c\u5c31\u770b\u4e0d\u89c1\u4e86\u3002<\/p>\n

\u4e94\u3001\u5b8c\u6574\u4ee3\u7801：\u5b9a\u65f6\u5668\u4e2d\u65ad\u626b\u63cf<\/h3>\n

\u628a\u4e0a\u9762\u7684\u7ed3\u8bba\u843d\u6210\u4ee3\u7801，\u4e3b\u5faa\u73af\u53ea\u8d1f\u8d23\u66f4\u65b0\u663e\u793a\u7f13\u51b2\u533a，\u5b8c\u5168\u4e0d\u78b0\u7aef\u53e3：<\/p>\n

#include <reg52.h><\/p>\n

typedef unsigned char u8;<\/p>\n

code u8 SEG[] = {
\n 0xC0, 0xF9, 0xA4, 0xB0, 0x99,
\n 0x92, 0x82, 0xF8, 0x80, 0x90,
\n 0xFF
\n};<\/p>\n

u8 disp_buf[4] = {0, 0, 0, 0}; \/\/ \u56db\u4f4d\u8981\u663e\u793a\u7684\u6570\u5b57 0~9
\nu8 scan_idx = 0;<\/p>\n

void timer0_init(void)
\n{
\n TMOD &= 0xF0;
\n TMOD |= 0x01; \/\/ \u5b9a\u65f6\u56680，\u6a21\u5f0f1，16 \u4f4d
\n TH0 = 0xFC; \/\/ 12MHz\u300112T \u4e0b\u7ea6 1ms
\n TL0 = 0x18;
\n ET0 = 1;
\n EA = 1;
\n TR0 = 1;
\n}<\/p>\n

void timer0_isr(void) interrupt 1
\n{
\n TH0 = 0xFC; \/\/ \u91cd\u88c5\u521d\u503c
\n TL0 = 0x18;<\/p>\n

P2 |= 0x0F; \/\/ \u5173\u5168\u90e8\u4f4d\u9009
\n P0 = SEG[disp_buf[scan_idx]]; \/\/ \u9001\u6bb5\u7801
\n P2 &= ~(1 << scan_idx); \/\/ \u5f00\u5f53\u524d\u4f4d
\n scan_idx = (scan_idx + 1) & 0x03;
\n}<\/p>\n

void main(void)
\n{
\n P2 |= 0x0F; \/\/ \u4e0a\u7535\u5148\u628a\u6240\u6709\u4f4d\u5173\u6389，\u907f\u514d\u590d\u4f4d\u77ac\u95f4\u5168\u4eae
\n P0 = 0xFF;
\n timer0_init();<\/p>\n

disp_buf[0] = 1;
\n disp_buf[1] = 2;
\n disp_buf[2] = 3;
\n disp_buf[3] = 4;<\/p>\n

while (1) {
\n \/\/ \u8fd9\u91cc\u505a\u4f20\u611f\u5668\u3001\u4e32\u53e3\u3001\u6309\u952e，\u968f\u65f6\u53ef\u4ee5\u6539 disp_buf
\n }
\n}<\/p>\n

\u8fd9\u6bb5\u4ee3\u7801\u6709\u4e2a\u524d\u63d0：\u4f4d\u9009\u662f\u4f4e\u7535\u5e73\u6709\u6548（PNP \u4e09\u6781\u7ba1\u57fa\u6781\u62c9\u4f4e\u5bfc\u901a），\u6bb5\u7801\u662f\u5171\u9633\u4f4e\u7535\u5e73\u70b9\u4eae\u3002\u5982\u679c\u4f60\u7684\u4f4d\u9009\u7528\u7684\u662f NPN \u6216\u8005\u76f4\u63a5\u63a5 IO，\u6781\u6027\u8981\u53cd\u8fc7\u6765，P2 |= 0x0F \u548c P2 &= ~(1 << scan_idx) \u8fd9\u4e24\u53e5\u90fd\u8981\u6539\u3002<\/p>\n

\u516d\u3001\u600e\u4e48\u5224\u65ad\u300c\u663e\u793a\u6b63\u5e38\u300d<\/h3>\n

\u710a\u5b8c\u4ee5\u540e\u4e0d\u8981\u53ea\u770b\u300c\u4eae\u4e0d\u4eae\u300d，\u6211\u6309\u8fd9\u51e0\u6761\u9a8c\u6536：<\/p>\n

  • \u663e\u793a 1111 \u548c 8888，\u56db\u4f4d\u4eae\u5ea6\u5e94\u5f53\u57fa\u672c\u4e00\u81f4\u3002\u5982\u679c 8 \u660e\u663e\u53d1\u7070，\u8bf4\u660e\u9650\u6d41\u8fd8\u662f\u653e\u5728\u4e86\u516c\u5171\u7aef\u3002<\/li>\n
  • \u624b\u673a\u7528\u6162\u52a8\u4f5c\u6216\u8005\u8fde\u62cd\u51e0\u5e27，\u770b\u6709\u6ca1\u6709\u7f3a\u4f4d\u3001\u6a2a\u7eb9\u3002\u6709\u4e9b\u95ee\u9898\u8089\u773c\u53cd\u5e94\u4e0d\u8fc7\u6765，\u4f46\u76f8\u673a\u91cc\u5f88\u660e\u663e\u3002<\/li>\n
  • \u8fde\u7eed\u8dd1\u534a\u5c0f\u65f6，\u6478\u4e00\u4e0b IO \u548c\u4e09\u6781\u7ba1\u3002\u8fd9\u91cc\u53ea\u662f\u5b9a\u6027\u68c0\u67e5\u6709\u6ca1\u6709\u5f02\u5e38\u53d1\u70ed，\u771f\u8981\u5224\u65ad\u7535\u6d41\u662f\u5426\u8d85\u6807\u8fd8\u662f\u5f97\u4e32\u4e07\u7528\u8868\u91cf\u3002<\/li>\n
  • \u65ad\u7535\u518d\u4e0a\u7535，\u770b\u6709\u6ca1\u6709\u54ea\u4e00\u4f4d\u6574\u4f4d\u95ea\u4e00\u4e0b\u3002\u6709\u7684\u8bdd\u8bf4\u660e\u4e0a\u7535\u521d\u59cb\u5316\u6ca1\u5148\u5173\u4f4d\u3002<\/li>\n

    \u5c0f\u7ed3<\/h3>\n

    \u8fd9\u6b21\u7684\u95ee\u9898\u770b\u8d77\u6765\u662f\u56db\u4ef6\u4e8b，\u5176\u5b9e\u662f\u4e00\u6761\u94fe：\u4f4d\u7535\u963b\u5bfc\u81f4\u4eae\u5ea6\u4e0d\u5747，\u6bb5\u7ebf\u65e0\u9650\u6d41\u5bfc\u81f4\u53d1\u70eb，P0 \u5f00\u6f0f\u6ca1\u4e0a\u62c9\u52a0\u91cd\u4e86\u6b8b\u5f71，\u626b\u63cf\u987a\u5e8f\u4e0d\u5bf9\u5e26\u6765\u5207\u6362\u62d6\u5f71\u3002\u6bcf\u4e00\u5904\u5355\u72ec\u770b\u90fd\u80fd\u300c\u8dd1\u8d77\u6765\u300d，\u53e0\u5728\u4e00\u8d77\u624d\u8ba9\u6574\u5757\u677f\u5b50\u663e\u5f97\u5f88\u4e0d\u4e13\u4e1a\u3002<\/p>\n

    \u5982\u679c\u53ea\u8ba9\u6211\u8bb0\u4e24\u53e5\u8bdd：\u9650\u6d41\u7535\u963b\u653e\u5728\u6bcf\u4e00\u6bb5\u4e0a，\u4e0d\u8981\u653e\u5728\u516c\u5171\u7aef；\u5237\u65b0\u4ea4\u7ed9\u5b9a\u65f6\u5668\u4e2d\u65ad，\u4e3b\u5faa\u73af\u53ea\u7ba1\u6570\u636e\u3002 \u5176\u4f59\u7684\u4e09\u6781\u7ba1\u4f4d\u9009\u3001\u4e0a\u62c9\u6392\u963b\u3001\u6d88\u5f71\u987a\u5e8f，\u90fd\u662f\u5728\u8fd9\u4e24\u6761\u57fa\u7840\u4e0a\u628a\u7535\u6d41\u548c\u65f6\u5e8f\u6536\u62fe\u5e72\u51c0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u4e0a\u5468\u7ed9\u5b9e\u9a8c\u5ba4\u505a\u4e00\u4e2a\u5c0f\u76d2\u5b50，\u91cc\u9762\u662f\u4e00\u5757 STC89C52，\u5916\u9762\u6302\u56db\u4f4d\u5171\u9633\u6570\u7801\u7ba1\u663e\u793a\u6e29\u5ea6\u3002\u9762\u5305\u677f\u4e0a\u5148\u628a\u7a0b\u5e8f\u8dd1\u901a\u4e86，\u663e\u793a 1234 \u633a\u597d\u770b，\u6211\u5c31\u76f4\u63a5\u7167\u7740\u710a\u5230\u6d1e\u6d1e\u677f\u4e0a\u3002\u7ed3\u679c\u540c\u4e00\u5957\u7a0b\u5e8f，\u710a\u5b8c\u4ee5\u540e\u95ee\u9898\u5168\u5192\u51fa\u6765\u4e86：\u6570\u5b57 8 \u660e\u663e\u6bd4 1 \u6697，\u6700\u53f3\u4e00\u4f4d\u6709\u70b9\u53d1\u865a，\u8fde\u7eed\u663e\u793a\u5341\u51e0\u5206\u949f\u4ee5\u540e P0 \u53e3\u9644\u8fd1\u6478\u7740\u53d1\u70eb，\u62ff\u624b\u673a\u62cd\u7167\u8fd8\u80fd\u770b\u5230\u6a2a\u7eb9\u3002\u6211\u4e00\u5f00\u59cb\u4ee5\u4e3a\u662f\u626b\u63cf\u65f6\u5e8f\u5199\u9519\u4e86&#xff0c<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14146,14145,2489,270,269],"topic":[],"class_list":["post-123460","post","type-post","status-publish","format-standard","hentry","category-server","tag-14146","tag-14145","tag-2489","tag-270","tag-269"],"yoast_head":"\n51 \u5355\u7247\u673a\u9a71\u52a8\u56db\u4f4d\u6570\u7801\u7ba1\uff1a\u52a8\u6001\u626b\u63cf\u3001\u9650\u6d41\u7535\u963b\u4e0e\u6d88\u5f71\u7684\u53d6\u820d - 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