{"id":1460,"date":"2024-11-17T18:29:10","date_gmt":"2024-11-17T10:29:10","guid":{"rendered":"https:\/\/aoofoo.com\/?p=1460"},"modified":"2024-11-19T16:37:16","modified_gmt":"2024-11-19T08:37:16","slug":"at32at32%e9%85%8d%e7%bd%aedelay%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/aoofoo.com\/index.php\/2024\/11\/17\/at32at32%e9%85%8d%e7%bd%aedelay%e5%87%bd%e6%95%b0\/","title":{"rendered":"[AT32]AT32\u914d\u7f6edelay\u51fd\u6570"},"content":{"rendered":"
\u8fd9\u91cc\u6240\u6709\u7684\u5185\u5bb9\uff0c\u4ec5\u9488\u5bf9AT32\uff0c\u5982\u679c\u4f60\u662fSTM32\u82af\u7247\uff0c\u4ec5\u4f9b\u53c2\u8003\uff0c\u53cd\u6b63\u90fd\u5dee\u4e0d\u591a\uff01<\/div><\/div>\n

SYSTICK\u7b80\u4ecb<\/h2>\n

\u7cfb\u7edf\u5600\u55d2\u5b9a\u65f6\u5668\u662f\u4e00\u4e2a 24 \u4f4d\u9012\u51cf\u8ba1\u6570\u5668\uff0c\u9012\u51cf\u81f3\u96f6\u53ef\u81ea\u52a8\u91cd\u8f7d\u8ba1\u6570\u521d\u503c\u3002\u53ef\u4ea7\u751f\u5468\u671f\u6027\u5f02\u5e38\uff0c\u7528\u4f5c\u5d4c\u5165\u5f0f\u64cd\u4f5c\u7cfb\u7edf\u7684\u591a\u4efb\u52a1\u8c03\u5ea6\u8ba1\u6570\u5668\uff0c\u6216\u5bf9\u4e8e\u65e0\u5d4c\u5165\u5f0f\u64cd\u4f5c\u7cfb\u7edf\uff0c\u53ef\u7528\u4e8e\u8c03\u7528\u9700\u5468\u671f\u6027\u6267\u884c\u7684\u4efb\u52a1\u3002\u7cfb\u7edf\u5600\u55d2\u5b9a\u65f6\u5668\u6821\u51c6\u503c\u56fa\u5b9a\u503c 9000\uff0c\u5f53\u7cfb\u7edf\u5600\u55d2\u65f6\u949f\u8bbe\u5b9a\u4e3a 9MHz\uff0c\u4ea7\u751f 1ms \u65f6\u95f4\u57fa\u51c6\u3002<\/p>\n

\u8fd9\u91cc\u6211\u4eec\u4f7f\u7528SYSTICK\u5b9a\u65f6\u5668\u6765\u5b8c\u6210\u6211\u4eec\u7684delay\u51fd\u6570\u3002<\/p>\n

AT32\u65f6\u949f\u6811<\/h2>\n

\"\"<\/p>\n

\u5927\u591a\u6570\u5916\u8bbe\u4f7f\u7528\u7cfb\u7edf\u65f6\u949f HCLK\u3001PCLK1 \u6216 PCLK2 \u65f6\u949f\u3002\u4e2a\u522b\u5916\u8bbe\u8fd8\u6709\u4e13\u7528\u65f6\u949f\u3002<\/p>\n

\u7cfb\u7edf\u5600\u55d2\u5b9a\u65f6\u5668\uff08SysTick\uff09\u4f7f\u7528 CPU FCLK(HCLK)\u6216 CPU systick(HCLK \u7684 8 \u5206\u9891)\u4f5c\u4e3a\u65f6\u949f\u3002<\/p>\n

ADC \u4f7f\u7528 HCLK \u65f6\u949f\u7684 2\u30013\u30014\u30015\u202617 \u5206\u9891\u4f5c\u4e3a\u65f6\u949f\u3002<\/p>\n

\u5b9a\u65f6\u5668\u4f7f\u7528 APB1\/2 \u4f5c\u4e3a\u65f6\u949f\uff0c\u7279\u522b\u5730\uff0c\u5f53 APB \u9884\u5206\u9891\u7cfb\u6570\u662f 1 \u65f6\uff0c\u5b9a\u65f6\u5668\u7684\u65f6\u949f\u9891\u7387\u7b49\u4e8e APB1\/2 \u7684\u65f6\u949f\u9891\u7387\uff1b\u5f53 APB \u9884\u5206\u9891\u7cfb\u6570\u4e0d\u4e3a 1 \u65f6\uff0c\u5b9a\u65f6\u5668\u7684\u65f6\u949f\u9891\u7387\u7b49\u4e8e APB1\/2 \u65f6\u949f\u9891\u7387\u7684 2 \u500d\u3002<\/p>\n

USB \u65f6\u949f\u53ef\u5728 HICK \u548c PLL \u5206\u9891\u65f6\u949f\u4e4b\u95f4\u5207\u6362\u3002\u5f53\u9009 HICK \u65f6\u949f\u6e90\u65f6\uff0c\u9700\u914d\u7f6e USB \u65f6\u949f\u4e3a 48MHz \u65f6\u949f\uff1b\u5f53\u9009 PLL \u5206\u9891\u65f6\u949f\u65f6\uff0cUSB \u5206\u9891\u5668\u63d0\u4f9b 48MHz \u7684 USBCLK \u65f6\u949f\uff0cPLL \u9700\u8bbe\u7f6e\u4e3a 48*N*0.5 MHz\uff08N=2,3,4,5\u2026\uff09\u3002<\/p>\n

ERTC \u7684\u65f6\u949f\u6e90\u6709\uff1aHEXT \u632f\u8361\u5668\u5206\u9891\u65f6\u949f\uff0cLEXT \u632f\u8361\u5668\u65f6\u949f LICK \u632f\u8361\u5668\u65f6\u949f\u3002ERTC \u7684\u65f6\u949f\u6e90\u4e00\u65e6\u9009\u62e9\u540e\u5c31\u4e0d\u53ef\u518d\u66f4\u6539\uff0c\u53ea\u6709\u5c06\u7535\u6c60\u4f9b\u7535\u57df\u590d\u4f4d\u540e\u624d\u80fd\u91cd\u65b0\u914d\u7f6e ERTC \u65f6\u949f\u6e90\u3002\u5f53 VDD \u6389\u7535\u65f6\uff0cERTC \u4f7f\u7528 LEXT \u4f5c\u4e3a\u65f6\u949f\u7684\u8bdd\uff0cERTC \u53ef\u4ee5\u7ee7\u7eed\u5de5\u4f5c\uff0c\u4f46 ERTC \u4f7f\u7528 HEXT \u6216 LICK \u4f5c\u4e3a\u65f6\u949f\u6e90\u65f6\uff0c\u7531\u4e8e HEXT\u548c LICK \u5747\u6389\u7535\uff0c\u4f1a\u5bfc\u81f4 ERTC \u72b6\u6001\u4e0d\u5b9a\u3002<\/p>\n

\u770b\u95e8\u72d7\u4f7f\u7528 LICK \u632f\u8361\u5668\u65f6\u949f\u4f5c\u4e3a\u65f6\u949f\u6e90\u3002\u786c\u4ef6\u9009\u9879\u6216\u8f6f\u4ef6\u5f00\u542f\u770b\u95e8\u72d7\u540e\uff0c\u5c06\u5f3a\u5236\u6253\u5f00 LICK \u632f\u8361\u5668\uff0cLICK\u632f\u8361\u5668\u7a33\u5b9a\u540e\uff0c\u624d\u7ed9\u770b\u95e8\u72d7\u63d0\u4f9b\u65f6\u949f\u3002<\/p>\n

SYSTICK\u914d\u7f6e<\/h2>\n

SysTick\u5b9a\u65f6\u5668\u4e0d\u662f\u81ea\u52a8\u914d\u7f6e\u597d\u7684\u3002\u9700\u8981\u624b\u52a8\u914d\u7f6e\u548c\u4f7f\u80fd\u3002\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

    \n
  • \u9009\u62e9\u65f6\u949f\u6e90\uff1a\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528HCLK\u3001HCLK\/8\u3002<\/li>\n
  • \u8bbe\u7f6e\u91cd\u88c5\u8f7d\u503c\uff08LOAD\u5bc4\u5b58\u5668\uff09\uff1a\u6839\u636e\u9700\u8981\u7684\u5b9a\u65f6\u5468\u671f\u8ba1\u7b97\u5e76\u8bbe\u7f6e\u3002<\/li>\n
  • \u6e05\u96f6\u5f53\u524d\u503c\uff08VAL\u5bc4\u5b58\u5668\uff09\uff1a\u8bbe\u7f6e\u4e3a0\u3002<\/li>\n
  • \u914d\u7f6e\u5e76\u542f\u7528SysTick\uff1a\u901a\u8fc7\u63a7\u5236\u5bc4\u5b58\u5668\u542f\u7528SysTick\u548c\u4e2d\u65ad\uff08\u5982\u679c\u9700\u8981\uff09\u3002<\/li>\n
  • \u5b8c\u6210\u8fd9\u4e9b\u914d\u7f6e\u540e\uff0cSysTick\u5b9a\u65f6\u5668\u5c31\u4f1a\u6b63\u5e38\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n
    <\/svg><\/span>
    \u5728C\u8bed\u8a00\u4e2d\uff0c1000000U\u4e2d\u7684U\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u6570\u5e38\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u5728\u8ba1\u7b97\u4e2d\u4f7f\u7528\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u907f\u514d\u6f5c\u5728\u7684\u7b26\u53f7\u76f8\u5173\u9519\u8bef\u3002<\/div><\/div>\n

     <\/p>\n

    static __IO uint32_t fac_us;\r\nstatic __IO uint32_t fac_ms;\r\n\r\nvoid delay_init()\r\n{\r\n  \/* configure systick *\/\r\n  systick_clock_source_config(SYSTICK_CLOCK_SOURCE_AHBCLK_NODIV);\r\n  fac_us = system_core_clock \/ (1000000U);\r\n  fac_ms = fac_us * (1000U);\r\n}<\/code><\/pre>\n
    \u914d\u7f6e SysTick \u5b9a\u65f6\u5668\u7684\u65f6\u949f\u6e90\u4e3aAHB\u603b\u7ebf\u65f6\u949f\uff0c\u5e76\u8ba1\u7b97\u5fae\u79d2\u548c\u6beb\u79d2\u5ef6\u65f6\u7684\u500d\u4e58\u56e0\u5b50\u3002<\/p>\n
    delay\u51fd\u6570<\/h2>\n
    \u5728\u5199\u5ef6\u65f6\u51fd\u6570\u4e4b\u524d\uff0c\u9700\u8981\u4e86\u89e3\u4e00\u4e0bSystick\u4e2d\u7684\u63a7\u5236\u5bc4\u5b58\u5668\uff08CTRL\uff09\uff1a<\/p>\n
    CTRL\u7684\u7b2c0\u4f4d\uff0c\u662fSYSTICK\u4f7f\u80fd\u4f4d\u3002<\/p>\n
    CTRL\u7684\u7b2c1\u4f4d\uff0c\u662fSYSTICK\u4e2d\u65ad\u4f7f\u80fd\u4f4d\uff0c\u7f6e0\u4ee3\u8868\u5173\u95edsystick\u4e2d\u65ad\uff0c\u7f6e1\u4ee3\u8868\u5f00\u542fsystick\u4e2d\u65ad\u3002<\/p>\n
    CTRL\u7684\u7b2c2\u4f4d\uff0c\u662f\u65f6\u949f\u6e90\u9009\u62e9\uff0c\u7f6e0\u4ee3\u8868HCLK\/8\uff0c\u7f6e1\u4ee3\u8868HCLK\u3002<\/p>\n
    CTRL\u7684\u7b2c16\u4f4d\uff0c\u662f\u8ba1\u6570\u6bd4\u8f83\u6807\u5fd7\uff0c\u5982\u679c\u8ba1\u6570\u5668\u8fbe\u52300\uff0c\u7b2c16\u4f4d\u4f1a\u81ea\u52a8\u7f6e1\uff0c\u88ab\u8bfb\u53d6\u540e\u81ea\u52a8\u7f6e0\u3002<\/p>\n
    \u5fae\u79d2\u5ef6\u65f6<\/h3>\n
    \u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e2a\u5ef6\u65f6\u51fd\u6570\u91cd\u65b0\u8bbe\u5b9a\u4e86\u91cd\u8f7d\u503c\uff08LOAD\uff09\uff0c\u8fd9\u5728\u88f8\u673a\u4e2d\u662f\u6ca1\u6709\u95ee\u9898\u7684\uff0c\u5e76\u4e14\u5bb9\u6613\u7406\u89e3\uff0c\u4f46\u662f\u5982\u679c\u662f\u5728RTOS\u4e2d\uff0c\u8fd9\u6837\u91cd\u7f6eLOAD\u503c\u7684\u505a\u6cd5\u662f\u4e0d\u53ef\u53d6\u7684\uff0c\u4f1a\u5bfc\u81f4RTOS\u7cfb\u7edf\u7684\u5d29\u6e83\u3002<\/p>\n
    void delay_us(uint32_t nus)\r\n{\r\n  uint32_t temp = 0;\r\n  SysTick->LOAD = (uint32_t)(nus * fac_us); \/\/\u91cd\u7f6eLOAD\r\n  SysTick->VAL = 0x00;\/\/\u91cd\u7f6e\u5f53\u524d\u8ba1\u6570\r\n  SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk ;\/\/\u542f\u52a8 SysTick \u8ba1\u6570\u5668\r\n  do\r\n  {\r\n    temp = SysTick->CTRL; \/\/\u8bfb\u53d6\u63a7\u5236\u5668\u7684\u503c\r\n  }while((temp & 0x01) && !(temp & (1 << 16)));\/\/\u53ea\u8981\u8ba1\u6570\u5668\u542f\u7528\uff0c\u4e14\u672a\u8fbe\u5230\u8ba1\u6570\u7ed3\u675f\uff0c\u5c31\u7ee7\u7eed\u7b49\u5f85\u3002\r\n\r\n  SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;\/\/\u505c\u6b62 SysTick \u8ba1\u6570\u5668\u3002\u6e05\u9664 ENABLE \u4f4d\uff0c\u505c\u6b62\u8ba1\u6570\u5668\u3002\r\n  SysTick->VAL = 0x00;\/\/\u6e05\u96f6\u8ba1\u6570\u5668\u7684\u5f53\u524d\u503c\u3002\u786e\u4fdd\u8ba1\u6570\u5668\u505c\u6b62\u540e\uff0cVAL \u5bc4\u5b58\u5668\u4e3a 0\u3002\r\n}<\/code><\/pre>\n
    \u6beb\u79d2\u5ef6\u65f6<\/h3>\n
    \u7531\u4e8e SysTick \u8ba1\u6570\u5668\u7684\u6700\u5927\u503c\u9650\u5236\uff0c\u5982\u679c\u4e00\u6b21\u6027\u5ef6\u65f6\u7684\u65f6\u95f4\u8fc7\u957f\uff08LOAD \u503c\u8d85\u8fc7 0xFFFFFF\uff09\uff0c\u4f1a\u5bfc\u81f4\u65e0\u6cd5\u5b9e\u73b0\u7cbe\u786e\u7684\u5ef6\u65f6\u3002
    \n\u901a\u8fc7\u5c06\u5ef6\u65f6\u5206\u4e3a\u591a\u4e2a\u4e0d\u8d85\u8fc7 STEP_DELAY_MS\uff0850ms\uff09\u7684\u6bb5\uff0c\u9010\u6bb5\u5b8c\u6210\u5ef6\u65f6\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4efb\u610f\u957f\u5ea6\u7684\u6beb\u79d2\u5ef6\u65f6\u3002
    \n\u9009\u62e9 50ms \u4f5c\u4e3a\u5355\u6b21\u6700\u5927\u5ef6\u65f6\uff0c\u662f\u4e3a\u4e86\u5728\u4fdd\u8bc1\u51c6\u786e\u6027\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u53ef\u80fd\u51cf\u5c11\u5faa\u73af\u6b21\u6570\u3002<\/p>\n
    #define STEP_DELAY_MS 50\r\n\r\nvoid delay_ms(uint16_t nms)\r\n{\r\n  uint32_t temp = 0;\r\n  while(nms)\r\n  {\r\n    if(nms > STEP_DELAY_MS)\r\n    {\r\n      SysTick->LOAD = (uint32_t)(STEP_DELAY_MS * fac_ms);\r\n      nms -= STEP_DELAY_MS;\r\n    }\r\n    else\r\n    {\r\n      SysTick->LOAD = (uint32_t)(nms * fac_ms);\r\n      nms = 0;\r\n    }\r\n    SysTick->VAL = 0x00;\r\n    SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;\r\n    do\r\n    {\r\n      temp = SysTick->CTRL;\r\n    }while((temp & 0x01) && !(temp & (1 << 16)));\r\n\r\n    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;\r\n    SysTick->VAL = 0x00;\r\n  }\r\n}<\/code><\/pre>\n
    \u00a0\u79d2\u5ef6\u65f6<\/h3>\n
    \u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u8c03\u7528 delay_ms(1000)<\/code>\uff1f<\/p>\n
    \u53ef\u80fd\u8003\u8651\u5230 delay_ms()<\/code> \u5728\u5904\u7406\u8f83\u957f\u65f6\u95f4\u5ef6\u65f6\u65f6\uff0c\u9700\u8981\u5206\u6bb5\u5904\u7406\uff0c\u8c03\u7528\u4e24\u6b21 delay_ms(500)<\/code> \u53ef\u4ee5\u51cf\u5c11\u5206\u6bb5\u6b21\u6570\uff0c\u63d0\u9ad8\u5ef6\u65f6\u7cbe\u5ea6\u3002<\/p>\n
    void delay_sec(uint16_t sec)\r\n{\r\n  uint16_t index;\r\n  for(index = 0; index < sec; index++)\r\n  {\r\n    delay_ms(500);\r\n    delay_ms(500);\r\n  }\r\n}<\/code><\/pre>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n","protected":false},"excerpt":{"rendered":"
    SYSTICK\u7b80\u4ecb \u7cfb\u7edf\u5600\u55d2\u5b9a\u65f6\u5668\u662f\u4e00\u4e2a 24 \u4f4d\u9012\u51cf\u8ba1\u6570\u5668\uff0c\u9012\u51cf\u81f3\u96f6\u53ef\u81ea\u52a8\u91cd\u8f7d\u8ba1\u6570\u521d\u503c\u3002\u53ef\u4ea7\u751f\u5468\u671f\u6027\u5f02\u5e38\uff0c\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[22,23,24,18],"class_list":["post-1460","post","type-post","status-publish","format-standard","hentry","category-issue","tag-at32","tag-23","tag-delay","tag-18"],"_links":{"self":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/comments?post=1460"}],"version-history":[{"count":5,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1460\/revisions"}],"predecessor-version":[{"id":1482,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/1460\/revisions\/1482"}],"wp:attachment":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/media?parent=1460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/categories?post=1460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/tags?post=1460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}