斯文人 发表于 2019-7-26 10:17 似乎没有看到你对PA10管脚的配置，程序没有配置有时候亮也正常，硬件导致的比如电容充放电引起的或者是其它 ... 是有控制代码的，只是时钟配置，基本配置还是有的 STM32F070F6P6选择内部时钟后，外部上电复位，有时点亮不了灯（外部晶振拆了）；（20次有1到2次会出现）使用外部晶振是没有问题的。 配置信息如下： static void SetSysClock(void) { __IO uint32_t StartUpCounter = 0, HSIStatus = 0; /* SYSCLK, HCLK, PCLK configuration ----------------------------------------*/ /* Enable HSI*/ //使能内部时钟 RCC->CR |= ((uint32_t)RCC_CR_HSION; /* Wait till HSI is ready and if Time out is reached exit */ //等待内部时钟起振 do { HSIStatus = RCC->CR & RCC_CR_HSIRDY; StartUpCounter++; } while((HSIStatus== 0) && (StartUpCounter != HSI_STARTUP_TIMEOUT)); if ((RCC->CR & RCC_CR_HSIRDY) != RESET) { HSIStatus = (uint32_t)0x01; } else { HSIStatus = (uint32_t)0x00; } if (HSIStatus == (uint32_t)0x01) { /* Enable Prefetch Buffer and set Flash Latency */ //flash总线时钟使能 FLASH->ACR = FLASH_ACR_PRFTBE | FLASH_ACR_LATENCY; /* HCLK = SYSCLK *///外设AHB总线时钟等于系统时钟 RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; /* PCLK = HCLK *///外设APB总线时钟等于系统时钟 RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE_DIV1; /* PLL configuration = HSI/2 * 12= 48 MHz */ RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL)); RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSI_Div2 | RCC_CFGR_PLLMULL12); //RC时钟2分频后 进行12倍频</font> /* Enable PLL *///使能锁相环倍频开关 RCC->CR |= RCC_CR_PLLON; /* Wait till PLL is ready *///等待锁相环就绪 while((RCC->CR & RCC_CR_PLLRDY) == 0) { } /* Select PLL as system clock source *///选择锁相环输出时钟作为系统时钟 RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; /* Wait till PLL is used as system clock source *///等待锁相环输出时钟已经成为系统时钟 while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_PLL) { } } else { /* If HSI fails to start-up, the application will have wrong clock configuration. User can add here some code to deal with this error */ } } 有板子的朋友也可以下载HEX试试，PA10上电灯会亮。
