{"id":75447,"date":"2026-02-12T10:41:38","date_gmt":"2026-02-12T02:41:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75447.html"},"modified":"2026-02-12T10:41:38","modified_gmt":"2026-02-12T02:41:38","slug":"%e5%b5%8c%e5%85%a5%e5%bc%8f%e5%bc%80%e5%8f%91%e5%ae%9e%e6%88%98%e8%a7%a3%e6%9e%90%ef%bc%9a%e6%b7%b1%e5%85%a5stm32%e6%97%b6%e9%92%9f%e6%a0%91%e8%ae%be%e8%ae%a1%e4%b8%8e%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75447.html","title":{"rendered":"\u5d4c\u5165\u5f0f\u5f00\u53d1\u5b9e\u6218\u89e3\u6790\uff1a\u6df1\u5165STM32\u65f6\u949f\u6811\u8bbe\u8ba1\u4e0e\u5e94\u7528"},"content":{"rendered":"

1. STM32\u65f6\u949f\u7cfb\u7edf：\u5d4c\u5165\u5f0f\u5f00\u53d1\u7684\u5fc3\u810f<\/h3>\n

\u8bb0\u5f97\u6211\u521a\u63a5\u89e6STM32\u7684\u65f6\u5019，\u6700\u8ba9\u6211\u5934\u75bc\u7684\u5c31\u662f\u65f6\u949f\u914d\u7f6e\u3002\u6709\u4e00\u6b21\u505a\u667a\u80fd\u5bb6\u5c45\u9879\u76ee，\u8bbe\u5907\u603b\u662f\u83ab\u540d\u5176\u5999\u5730\u91cd\u542f，\u6392\u67e5\u4e86\u534a\u5929\u624d\u53d1\u73b0\u662f\u65f6\u949f\u914d\u7f6e\u9519\u4e86\u3002STM32\u7684\u65f6\u949f\u7cfb\u7edf\u5c31\u50cf\u4eba\u4f53\u7684\u8840\u6db2\u5faa\u73af\u7cfb\u7edf，\u5982\u679c\u5fc3\u8df3\u4e0d\u7a33，\u6574\u4e2a\u8eab\u4f53\u90fd\u4f1a\u51fa\u95ee\u9898\u3002\u5bf9\u4e8e\u5d4c\u5165\u5f0f\u5f00\u53d1\u8005\u6765\u8bf4，\u7406\u89e3\u65f6\u949f\u6811\u4e0d\u4ec5\u662f\u57fa\u672c\u529f，\u66f4\u662f\u4f18\u5316\u7cfb\u7edf\u6027\u80fd\u548c\u529f\u8017\u7684\u5173\u952e\u3002<\/p>\n

STM32\u7684\u65f6\u949f\u7cfb\u7edf\u4e4b\u6240\u4ee5\u590d\u6742，\u662f\u56e0\u4e3a\u5b83\u8981\u6ee1\u8db3\u4e0d\u540c\u5916\u8bbe\u5bf9\u65f6\u949f\u9891\u7387\u7684\u4e0d\u540c\u9700\u6c42\u3002\u6bd4\u5982USB\u63a5\u53e3\u9700\u898148MHz\u7684\u7cbe\u786e\u65f6\u949f，RTC\u5b9e\u65f6\u65f6\u949f\u53ea\u9700\u898132.768kHz\u7684\u4f4e\u9891\u65f6\u949f，\u800c\u7535\u673a\u63a7\u5236\u53ef\u80fd\u9700\u8981\u9ad8\u8fbe72MHz\u7684\u4e3b\u9891\u3002\u5982\u679c\u6240\u6709\u5916\u8bbe\u90fd\u7528\u540c\u4e00\u4e2a\u65f6\u949f\u6e90，\u8981\u4e48\u6027\u80fd\u4e0d\u591f，\u8981\u4e48\u529f\u8017\u592a\u9ad8\u3002STM32\u901a\u8fc7\u65f6\u949f\u6811\u5b9e\u73b0\u4e86\u7075\u6d3b\u7684\u65f6\u949f\u5206\u914d，\u8ba9\u6bcf\u4e2a\u5916\u8bbe\u90fd\u80fd\u83b7\u5f97\u6700\u5408\u9002\u7684\u65f6\u949f\u9891\u7387\u3002<\/p>\n

\u5728\u5b9e\u9645\u9879\u76ee\u4e2d，\u6211\u4e60\u60ef\u628a\u65f6\u949f\u6811\u60f3\u8c61\u6210\u4e00\u4e2a\u5927\u578b\u4ea4\u901a\u67a2\u7ebd：\u6709\u591a\u4e2a\u5165\u53e3（\u65f6\u949f\u6e90），\u6709\u7acb\u4ea4\u6865（PLL\u500d\u9891），\u8fd8\u6709\u4e0d\u540c\u7684\u51fa\u53e3（\u5916\u8bbe\u65f6\u949f）\u3002\u53ea\u6709\u5408\u7406\u89c4\u5212\u6bcf\u4e2a\u8def\u53e3\u7684\u4fe1\u53f7\u706f（\u5206\u9891\u7cfb\u6570），\u624d\u80fd\u8ba9\u6574\u4e2a\u4ea4\u901a\u7cfb\u7edf\u9ad8\u6548\u8fd0\u8f6c\u3002\u63a5\u4e0b\u6765\u6211\u5c31\u5e26\u5927\u5bb6\u6df1\u5165STM32\u7684\u65f6\u949f\u6811\u8bbe\u8ba1，\u5206\u4eab\u4e00\u4e9b\u5b9e\u6218\u4e2d\u7684\u914d\u7f6e\u6280\u5de7\u548c\u907f\u5751\u7ecf\u9a8c\u3002<\/p>\n

2. \u4e94\u5927\u65f6\u949f\u6e90\u6df1\u5ea6\u89e3\u6790<\/h3>\n

2.1 HSE\u4e0eHSI：\u9ad8\u901f\u65f6\u949f\u7684\u6289\u62e9<\/h4>\n

HSI\u662fSTM32\u5185\u90e8\u81ea\u5e26\u76848MHz RC\u632f\u8361\u5668，\u6700\u5927\u7684\u4f18\u70b9\u662f\u4e0a\u7535\u5c31\u80fd\u7528，\u4e0d\u9700\u8981\u5916\u90e8\u5143\u4ef6\u3002\u6211\u5728\u4e00\u4e9b\u6210\u672c\u654f\u611f\u7684\u9879\u76ee\u4e2d\u7ecf\u5e38\u4f7f\u7528HSI，\u6bd4\u5982\u7b80\u5355\u7684\u667a\u80fd\u63d2\u5ea7\u6216\u8005LED\u63a7\u5236\u5668\u3002\u4f46HSI\u6709\u4e2a\u81f4\u547d\u7f3a\u70b9\u2014\u2014\u7cbe\u5ea6\u53ea\u6709\u00b11%，\u6e29\u5ea6\u53d8\u5316\u65f6\u9891\u7387\u4f1a\u6f02\u79fb\u3002\u6709\u4e00\u6b21\u505a\u6e29\u63a7\u5668\u9879\u76ee，\u5c31\u56e0\u4e3aHSI\u7684\u6e29\u6f02\u5bfc\u81f4PID\u63a7\u5236\u7b97\u6cd5\u5931\u8c03，\u6e29\u5ea6\u6ce2\u52a8\u8d85\u8fc7\u00b12\u2103\u3002<\/p>\n

HSE\u9700\u8981\u5916\u63a54-16MHz\u7684\u6676\u632f，\u901a\u5e38\u6211\u4eec\u9009\u62e98MHz\u3002\u867d\u7136\u6210\u672c\u9ad8\u4e86\u70b9，\u4f46\u7cbe\u5ea6\u53ef\u4ee5\u8fbe\u5230\u00b10.1%，\u7a33\u5b9a\u6027\u597d\u5f88\u591a\u3002\u5728\u9700\u8981\u7cbe\u786e\u65f6\u5e8f\u7684\u5e94\u7528\u4e2d，\u6bd4\u5982\u5de5\u4e1a\u901a\u4fe1\u6216\u8005\u97f3\u9891\u5904\u7406，\u5fc5\u987b\u4f7f\u7528HSE\u3002\u914d\u7f6eHSE\u65f6\u8981\u6ce8\u610f\u542f\u52a8\u65f6\u95f4，STM32F103\u7684HSE\u542f\u52a8\u8d85\u65f6\u65f6\u95f4\u9ed8\u8ba4\u662f0x5000\u4e2a\u5468\u671f，\u5982\u679c\u6676\u632f\u8d28\u91cf\u4e0d\u597d\u6216\u8005\u8d1f\u8f7d\u7535\u5bb9\u4e0d\u5339\u914d，\u53ef\u80fd\u4f1a\u542f\u52a8\u5931\u8d25\u3002<\/p>\n

\/\/ HSE\u542f\u52a8\u914d\u7f6e\u793a\u4f8b
\nRCC_HSEConfig(RCC_HSE_ON); \/\/ \u5f00\u542fHSE
\nwhile(!RCC_WaitForHSEStartUp()); \/\/ \u7b49\u5f85HSE\u5c31\u7eea<\/p>\n

2.2 LSE\u4e0eLSI：\u4f4e\u529f\u8017\u573a\u666f\u7684\u5229\u5668<\/h4>\n

LSE\u901a\u5e38\u8fde\u63a532.768kHz\u7684\u624b\u8868\u6676\u632f，\u529f\u8017\u6781\u4f4e\u4f46\u7cbe\u5ea6\u5f88\u9ad8，\u9002\u5408RTC\u5b9e\u65f6\u65f6\u949f\u3002\u6211\u5728\u667a\u80fd\u7535\u8868\u9879\u76ee\u4e2d\u5c31\u7528LSE\u505a\u65f6\u95f4\u57fa\u51c6，\u4e00\u4e2a\u6708\u8bef\u5dee\u4e0d\u523010\u79d2\u3002LSI\u662f\u5185\u90e8\u768440kHz RC\u632f\u8361\u5668，\u7cbe\u5ea6\u8f83\u5dee\u4f46\u4e0d\u9700\u8981\u5916\u90e8\u5143\u4ef6，\u9002\u5408\u770b\u95e8\u72d7\u6216\u8005\u5bf9\u65f6\u95f4\u7cbe\u5ea6\u8981\u6c42\u4e0d\u9ad8\u7684\u4f4e\u529f\u8017\u5e94\u7528\u3002<\/p>\n

\u9009\u62e9LSE\u8fd8\u662fLSI，\u5173\u952e\u770b\u9879\u76ee\u9700\u6c42\u3002\u5982\u679c\u9700\u8981\u957f\u65f6\u95f4\u7cbe\u786e\u8ba1\u65f6，\u6bd4\u5982\u6570\u636e\u8bb0\u5f55\u4eea\u6bcf\u5c0f\u65f6\u8bb0\u5f55\u4e00\u6b21\u6570\u636e，\u5fc5\u987b\u7528LSE\u3002\u5982\u679c\u53ea\u662f\u5076\u5c14\u9700\u8981\u65f6\u95f4\u53c2\u8003，\u6bd4\u5982\u6bcf\u5929\u540c\u6b65\u4e00\u6b21\u7f51\u7edc\u65f6\u95f4，\u7528LSI\u4e5f\u80fd\u6ee1\u8db3\u8981\u6c42\u3002\u8981\u6ce8\u610f\u7684\u662f，LSI\u7684\u9891\u7387\u4f1a\u968f\u7535\u538b\u548c\u6e29\u5ea6\u53d8\u5316，\u6211\u5728\u7535\u6c60\u4f9b\u7535\u9879\u76ee\u4e2d\u5b9e\u6d4b\u8fc7，\u7535\u538b\u4ece3.6V\u964d\u52302.0V\u65f6，LSI\u9891\u7387\u4f1a\u4ece40kHz\u6f02\u79fb\u523035kHz\u5de6\u53f3\u3002<\/p>\n

2.3 PLL：\u6027\u80fd\u63d0\u5347\u7684\u5173\u952e\u5f15\u64ce<\/h4>\n

PLL\u9501\u76f8\u73af\u662f\u65f6\u949f\u7cfb\u7edf\u7684\u6838\u5fc3\u5f15\u64ce，\u80fd\u628a\u8f93\u5165\u65f6\u949f\u500d\u9891\u5230\u66f4\u9ad8\u7684\u9891\u7387\u3002STM32F103\u7684PLL\u53ef\u4ee5\u5c06HSI\u6216HSE\u500d\u9891\u523072MHz，\u6027\u80fd\u63d0\u53479\u500d\u3002\u4f46PLL\u914d\u7f6e\u6709\u5f88\u591a\u5751，\u6211\u7b2c\u4e00\u6b21\u7528\u7684\u65f6\u5019\u5c31\u683d\u4e86\u8ddf\u5934\u3002<\/p>\n

PLL\u7684\u500d\u9891\u7cfb\u6570\u9700\u8981\u4ed4\u7ec6\u8ba1\u7b97：PLL\u8f93\u51fa\u9891\u7387 = \u8f93\u5165\u9891\u7387 \u00d7 (PLLMUL + 2) \/ 2\u3002\u6bd4\u5982\u8f93\u51658MHz\u7684HSE，\u8981\u5f97\u523072MHz\u8f93\u51fa，\u9700\u8981\u8bbe\u7f6ePLLMUL=7，\u56e0\u4e3a8 \u00d7 (7+2)\/2 = 72\u3002\u4f46STM32F103\u7684PLL\u8f93\u5165\u9891\u7387\u4e0d\u80fd\u8d85\u8fc716MHz，\u8f93\u51fa\u4e0d\u80fd\u8d85\u8fc772MHz，\u8fd9\u4e9b\u9650\u5236\u4e00\u5b9a\u8981\u8bb0\u7262\u3002<\/p>\n

\/\/ PLL\u914d\u7f6e\u793a\u4f8b（\u4f7f\u7528HSE\u4f5c\u4e3a\u8f93\u5165\u6e90）
\nRCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); \/\/ 8MHz * 9 = 72MHz
\nRCC_PLLCmd(ENABLE);
\nwhile(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); \/\/ \u7b49\u5f85PLL\u5c31\u7eea<\/p>\n

3. \u65f6\u949f\u6811\u5b9e\u9645\u914d\u7f6e\u5b9e\u6218<\/h3>\n

3.1 \u7cfb\u7edf\u65f6\u949f\u914d\u7f6e\u6b65\u9aa4<\/h4>\n

\u914d\u7f6e\u7cfb\u7edf\u65f6\u949f\u5c31\u50cf\u7ed9\u7535\u8111\u8d85\u9891，\u65e2\u8981\u8ffd\u6c42\u6027\u80fd\u53c8\u8981\u4fdd\u8bc1\u7a33\u5b9a\u3002\u6211\u603b\u7ed3\u4e86\u4e00\u4e2a\u7a33\u59a5\u7684\u914d\u7f6e\u6d41\u7a0b：\u5148\u5f00\u542f\u76ee\u6807\u65f6\u949f\u6e90，\u7b49\u5f85\u5c31\u7eea\u540e\u914d\u7f6ePLL\u53c2\u6570，\u7136\u540e\u5207\u6362\u7cfb\u7edf\u65f6\u949f\u6e90，\u6700\u540e\u68c0\u67e5\u914d\u7f6e\u662f\u5426\u6210\u529f\u3002\u5343\u4e07\u4e0d\u8981\u4e00\u4e0a\u6765\u5c31\u76f4\u63a5\u5207\u6362\u65f6\u949f\u6e90，\u5426\u5219\u5927\u6982\u7387\u4f1a\u6b7b\u673a\u3002<\/p>\n

\u4ee5\u6700\u5e38\u7528\u7684HSE+PLL\u914d\u7f6e\u4e3a\u4f8b，\u5177\u4f53\u6b65\u9aa4\u662f：\u9996\u5148\u4f7f\u80fdHSE，\u7b49\u5f85HSE\u5c31\u7eea\u540e\u8bbe\u7f6eFLASH\u5ef6\u8fdf（\u8fd9\u4e2a\u5f88\u91cd\u8981，\u5426\u5219\u9ad8\u901f\u8fd0\u884c\u4f1a\u51fa\u9519），\u7136\u540e\u914d\u7f6ePLL\u53c2\u6570\u5e76\u4f7f\u80fdPLL，\u6700\u540e\u5c06\u7cfb\u7edf\u65f6\u949f\u5207\u6362\u5230PLL\u8f93\u51fa\u3002\u6574\u4e2a\u8fc7\u7a0b\u9700\u8981\u4e25\u683c\u9075\u5faa\u6570\u636e\u624b\u518c\u4e2d\u7684\u65f6\u5e8f\u8981\u6c42\u3002<\/p>\n

void SystemClock_Config(void)
\n{
\n \/\/ 1. \u4f7f\u80fdHSE
\n RCC_HSEConfig(RCC_HSE_ON);
\n while(!RCC_WaitForHSEStartUp());<\/p>\n

\/\/ 2. \u8bbe\u7f6eFLASH\u9884\u53d6\u6307\u548c\u5ef6\u8fdf
\n FLASH_SetLatency(FLASH_Latency_2);
\n FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);<\/p>\n

\/\/ 3. \u914d\u7f6ePLL（HSE\u4f5c\u4e3a\u8f93\u5165，9\u500d\u9891）
\n RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
\n RCC_PLLCmd(ENABLE);
\n while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);<\/p>\n

\/\/ 4. \u5207\u6362\u7cfb\u7edf\u65f6\u949f\u6e90
\n RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
\n while(RCC_GetSYSCLKSource() != 0x08); \/\/ \u68c0\u67e5\u5207\u6362\u662f\u5426\u6210\u529f
\n}<\/p>\n

3.2 \u5916\u8bbe\u65f6\u949f\u5206\u914d\u6280\u5de7<\/h4>\n

STM32\u7684\u5916\u8bbe\u65f6\u949f\u901a\u8fc7APB1\u548cAPB2\u603b\u7ebf\u5206\u914d，\u8fd9\u4e24\u4e2a\u603b\u7ebf\u7684\u6700\u5927\u9891\u7387\u4e0d\u540c：APB2\u6700\u9ad872MHz，APB1\u6700\u9ad836MHz\u3002\u6211\u5728\u7b2c\u4e00\u6b21\u505a\u9879\u76ee\u65f6\u5c31\u72af\u8fc7\u9519\u8bef，\u628aSPI1（\u6302\u8f7d\u5728APB2）\u548cSPI2（\u6302\u8f7d\u5728APB1）\u90fd\u8bbe\u6210\u4e8636MHz，\u7ed3\u679cSPI2\u5b9e\u9645\u53ea\u670918MHz，\u56e0\u4e3aAPB1\u9ed8\u8ba42\u5206\u9891\u3002<\/p>\n

APB\u603b\u7ebf\u7684\u5206\u9891\u7cfb\u6570\u9700\u8981\u6839\u636e\u5916\u8bbe\u9700\u6c42\u7075\u6d3b\u8bbe\u7f6e\u3002\u5982\u679cAPB1\u4e0a\u53ea\u6709UART\u548cI2C\u8fd9\u7c7b\u4f4e\u901f\u5916\u8bbe，\u53ef\u4ee5\u8bbe\u7f6e2\u5206\u9891\u751a\u81f34\u5206\u9891\u6765\u964d\u4f4e\u529f\u8017\u3002\u5982\u679cAPB2\u4e0a\u6709ADC\u8fd9\u7c7b\u9700\u8981\u8f83\u9ad8\u65f6\u949f\u901f\u5ea6\u7684\u5916\u8bbe，\u6700\u597d\u8bbe\u7f6e1\u5206\u9891\u537372MHz\u5168\u901f\u8fd0\u884c\u3002\u5177\u4f53\u914d\u7f6e\u901a\u8fc7RCC_PCLK1Config\u548cRCC_PCLK2Config\u51fd\u6570\u5b9e\u73b0\u3002<\/p>\n

\/\/ \u5916\u8bbe\u65f6\u949f\u914d\u7f6e\u793a\u4f8b
\nRCC_PCLK1Config(RCC_HCLK_Div2); \/\/ APB1\u65f6\u949f = 36MHz
\nRCC_PCLK2Config(RCC_HCLK_Div1); \/\/ APB2\u65f6\u949f = 72MHz<\/p>\n

\/\/ \u4f7f\u80fd\u5177\u4f53\u5916\u8bbe\u65f6\u949f
\nRCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);
\nRCC_APB1PeriphClockCmd(RCC_APB1Periph_UART2 | RCC_APB1Periph_I2C1, ENABLE);<\/p>\n

4. \u6027\u80fd\u4e0e\u529f\u8017\u7684\u5e73\u8861\u827a\u672f<\/h3>\n

4.1 \u52a8\u6001\u65f6\u949f\u5207\u6362\u6280\u672f<\/h4>\n

\u5728\u5b9e\u9645\u9879\u76ee\u4e2d，\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5728\u6027\u80fd\u548c\u529f\u8017\u4e4b\u95f4\u627e\u5e73\u8861\u3002STM32\u652f\u6301\u8fd0\u884c\u65f6\u52a8\u6001\u5207\u6362\u65f6\u949f\u6e90，\u8fd9\u4e2a\u529f\u80fd\u5728\u7535\u6c60\u4f9b\u7535\u8bbe\u5907\u4e2d\u7279\u522b\u6709\u7528\u3002\u6bd4\u5982\u667a\u80fd\u624b\u73af\u5728\u6b63\u5e38\u5de5\u4f5c\u65f6\u4f7f\u7528PLL\u63d0\u4f9b72MHz\u4e3b\u9891，\u5728\u5f85\u673a\u65f6\u5207\u6362\u5230HSI\u751a\u81f3MSI（\u66f4\u4f4e\u901f\u7684\u5185\u90e8\u65f6\u949f），\u53ef\u4ee5\u5927\u5e45\u964d\u4f4e\u529f\u8017\u3002<\/p>\n

\u6211\u505a\u8fc7\u4e00\u4e2a\u73af\u5883\u76d1\u6d4b\u5668\u7684\u9879\u76ee，\u8bbe\u5907\u6bcf5\u5206\u949f\u91c7\u96c6\u4e00\u6b21\u6570\u636e，\u5176\u4f59\u65f6\u95f4\u4f11\u7720\u3002\u901a\u8fc7\u52a8\u6001\u65f6\u949f\u5207\u6362，\u5e73\u5747\u529f\u8017\u4ece12mA\u964d\u5230\u4e861.5mA，\u7535\u6c60\u5bff\u547d\u4ece2\u5929\u5ef6\u957f\u5230\u4e862\u5468\u3002\u5b9e\u73b0\u65b9\u6cd5\u662f：\u5728\u8fdb\u5165\u4f4e\u529f\u8017\u6a21\u5f0f\u524d，\u5c06\u7cfb\u7edf\u65f6\u949f\u5207\u6362\u5230HSI\u6216MSI，\u5173\u95edPLL\u548cHSE；\u5524\u9192\u540e\u518d\u5207\u6362\u56de\u9ad8\u901f\u65f6\u949f\u3002<\/p>\n

\/\/ \u5207\u6362\u5230\u4f4e\u529f\u8017\u6a21\u5f0f（\u4f7f\u7528HSI）
\nRCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); \/\/ \u5148\u5207\u6362\u5230HSI
\nwhile(RCC_GetSYSCLKSource() != 0x00);
\nRCC_PLLCmd(DISABLE); \/\/ \u5173\u95edPLL
\nRCC_HSEConfig(RCC_HSE_OFF); \/\/ \u5173\u95edHSE<\/p>\n

\/\/ \u5524\u9192\u540e\u6062\u590d\u9ad8\u901f\u65f6\u949f
\nRCC_HSEConfig(RCC_HSE_ON);
\nwhile(!RCC_WaitForHSEStartUp());
\n\/\/ … \u91cd\u65b0\u914d\u7f6ePLL\u548c\u7cfb\u7edf\u65f6\u949f<\/p>\n

4.2 \u5916\u8bbe\u65f6\u949f\u95e8\u63a7\u4f18\u5316<\/h4>\n

\u5f88\u591a\u521d\u5b66\u8005\u5bb9\u6613\u5ffd\u7565\u5916\u8bbe\u65f6\u949f\u7684\u95e8\u63a7\u7ba1\u7406，\u8ba4\u4e3a\u53ea\u8981\u521d\u59cb\u5316\u65f6\u5f00\u542f\u65f6\u949f\u5c31\u884c\u4e86\u3002\u5176\u5b9e\u53ca\u65f6\u5173\u95ed\u4e0d\u4f7f\u7528\u7684\u5916\u8bbe\u65f6\u949f，\u80fd\u663e\u8457\u964d\u4f4e\u529f\u8017\u3002\u6211\u6709\u6b21\u7528STM32\u505a\u65e0\u7ebf\u4f20\u611f\u5668\u8282\u70b9，\u53d1\u73b0\u5373\u4f7f\u8fdb\u5165\u4f11\u7720\u6a21\u5f0f，\u529f\u8017\u8fd8\u662f\u6bd4\u9884\u671f\u9ad8100\u03bcA，\u6700\u540e\u53d1\u73b0\u662f\u5fd8\u8bb0\u5173\u95edADC\u7684\u65f6\u949f\u3002<\/p>\n

STM32\u7684\u6240\u6709\u5916\u8bbe\u65f6\u949f\u90fd\u53ef\u4ee5\u72ec\u7acb\u63a7\u5236，\u5efa\u8bae\u5728\u5916\u8bbe\u521d\u59cb\u5316\u65f6\u5f00\u542f\u65f6\u949f，\u4f7f\u7528\u5b8c\u6210\u540e\u7acb\u5373\u5173\u95ed\u3002\u5bf9\u4e8e\u95f4\u6b47\u6027\u4f7f\u7528\u7684\u5916\u8bbe，\u5982ADC\u6216DAC，\u6700\u597d\u5728\u4f7f\u7528\u524d\u5f00\u542f\u65f6\u949f，\u4f7f\u7528\u540e\u7acb\u5373\u5173\u95ed\u3002\u867d\u7136\u4ee3\u7801\u4f1a\u590d\u6742\u4e00\u4e9b，\u4f46\u529f\u8017\u4f18\u5316\u6548\u679c\u5f88\u660e\u663e\u3002<\/p>\n

\/\/ \u4f18\u5316\u5916\u8bbe\u65f6\u949f\u4f7f\u7528\u793a\u4f8b
\nvoid ReadTemperature(void)
\n{
\n \/\/ \u4f7f\u7528ADC\u524d\u624d\u5f00\u542f\u65f6\u949f
\n RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);<\/p>\n

\/\/ ADC\u914d\u7f6e\u548c\u91c7\u6837…
\n ADC_StartConversion();
\n while(!ADC_GetFlagStatus(ADC_FLAG_EOC));
\n uint16_t value = ADC_GetConversionValue();<\/p>\n

\/\/ \u7acb\u5373\u5173\u95edADC\u65f6\u949f
\n RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, DISABLE);
\n}<\/p>\n

5. \u5e38\u89c1\u95ee\u9898\u4e0e\u8c03\u8bd5\u6280\u5de7<\/h3>\n

5.1 \u65f6\u949f\u914d\u7f6e\u6545\u969c\u6392\u67e5<\/h4>\n

\u65f6\u949f\u914d\u7f6e\u51fa\u95ee\u9898\u65f6，\u7cfb\u7edf\u5f80\u5f80\u8868\u73b0\u4e3a\u8fd0\u884c\u4e0d\u7a33\u5b9a\u3001\u5916\u8bbe\u5de5\u4f5c\u5f02\u5e38\u6216\u76f4\u63a5\u6b7b\u673a\u3002\u6211\u603b\u7ed3\u4e86\u4e00\u5957\u6392\u67e5\u65b9\u6cd5：\u9996\u5148\u68c0\u67e5\u65f6\u949f\u6e90\u662f\u5426\u6b63\u5e38\u8d77\u632f，\u53ef\u4ee5\u7528\u793a\u6ce2\u5668\u6d4b\u91cfOSC_IN\u548cOSC_OUT\u5f15\u811a；\u7136\u540e\u68c0\u67e5PLL\u914d\u7f6e\u53c2\u6570\u662f\u5426\u6b63\u786e，\u7279\u522b\u662f\u8f93\u5165\u9891\u7387\u662f\u5426\u8d85\u51fa\u8303\u56f4；\u6700\u540e\u68c0\u67e5FLASH\u5ef6\u8fdf\u8bbe\u7f6e，\u9ad8\u901f\u65f6\u949f\u5fc5\u987b\u914d\u5408\u76f8\u5e94\u7684\u7b49\u5f85\u5468\u671f\u3002<\/p>\n

STM32\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65f6\u949f\u72b6\u6001\u6807\u5fd7\u4f4d，\u8c03\u8bd5\u65f6\u8981\u5584\u52a0\u5229\u7528\u3002RCC_GetSYSCLKSource()\u53ef\u4ee5\u83b7\u53d6\u5f53\u524d\u7cfb\u7edf\u65f6\u949f\u6e90，RCC_GetClocksFreq()\u53ef\u4ee5\u8bfb\u53d6\u5404\u603b\u7ebf\u5b9e\u9645\u9891\u7387\u3002\u5982\u679c\u6000\u7591\u65f6\u949f\u914d\u7f6e\u6709\u95ee\u9898，\u53ef\u4ee5\u5148\u7528\u8fd9\u4e9b\u51fd\u6570\u68c0\u67e5\u5b9e\u9645\u914d\u7f6e\u662f\u5426\u4e0e\u9884\u671f\u4e00\u81f4\u3002<\/p>\n

\/\/ \u65f6\u949f\u72b6\u6001\u68c0\u67e5\u51fd\u6570
\nuint32_t sysclk_source = RCC_GetSYSCLKSource();
\nRCC_ClocksTypeDef clocks;
\nRCC_GetClocksFreq(&clocks);<\/p>\n

printf("SYSCLK: %lu Hz\\\\n", clocks.SYSCLK_Frequency);
\nprintf("HCLK: %lu Hz\\\\n", clocks.HCLK_Frequency);
\nprintf("PCLK1: %lu Hz\\\\n", clocks.PCLK1_Frequency);
\nprintf("PCLK2: %lu Hz\\\\n", clocks.PCLK2_Frequency);<\/p>\n

5.2 \u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u7684\u65f6\u949f\u7ba1\u7406<\/h4>\n

\u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u7684\u65f6\u949f\u7ba1\u7406\u6709\u5f88\u591a\u5751，\u6211\u6700\u6df1\u7684\u4e00\u6b21\u6559\u8bad\u662f\u5fd8\u8bb0\u5904\u7406RTC\u65f6\u949f\u6e90\u5207\u6362\u3002STM32\u5728\u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u4f1a\u81ea\u52a8\u5173\u95ed\u4e00\u4e9b\u65f6\u949f\u6e90，\u4f46\u5982\u679cRTC\u6b63\u5728\u4f7f\u7528LSE，\u5207\u6362\u65f6\u949f\u6e90\u4f1a\u5bfc\u81f4RTC\u8ba1\u6570\u5f02\u5e38\u3002\u540e\u6765\u6211\u517b\u6210\u4e86\u4e60\u60ef：\u5728\u8fdb\u5165\u4f4e\u529f\u8017\u524d，\u68c0\u67e5\u6240\u6709\u6d3b\u8dc3\u5916\u8bbe\u7684\u65f6\u949f\u9700\u6c42，\u786e\u4fdd\u4e0d\u4f1a\u610f\u5916\u5173\u95ed\u6b63\u5728\u4f7f\u7528\u7684\u65f6\u949f\u6e90\u3002<\/p>\n

\u4e0d\u540c\u4f4e\u529f\u8017\u6a21\u5f0f\u5bf9\u65f6\u949f\u7684\u5f71\u54cd\u4e0d\u540c：\u7761\u7720\u6a21\u5f0f\u53ea\u5173\u95edCPU\u65f6\u949f，\u5916\u8bbe\u65f6\u949f\u4ecd\u7136\u6b63\u5e38；\u505c\u6b62\u6a21\u5f0f\u5173\u95ed\u6240\u6709\u65f6\u949f，\u53ea\u4fdd\u7559\u4f4e\u901f\u65f6\u949f；\u5f85\u673a\u6a21\u5f0f\u751a\u81f3\u5173\u95ed\u4f4e\u901f\u65f6\u949f，\u53ea\u4fdd\u7559\u5907\u4efd\u57df\u7535\u6e90\u3002\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u4f4e\u529f\u8017\u6a21\u5f0f，\u907f\u514d\u8fc7\u5ea6\u7701\u7535\u5bfc\u81f4\u529f\u80fd\u5f02\u5e38\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

1. STM32\u65f6\u949f\u7cfb\u7edf：\u5d4c\u5165\u5f0f\u5f00\u53d1\u7684\u5fc3\u810f
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