rt-thread使用外部时钟

发布于 2020-07-24 18:44:33 浏览：1250 订阅该版

rt-thread studio生成4.0.2的stm32f030c8系列工程，使用外部时钟出现以下问题：
1、uart1默认做console输出，debug卡在
 while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET);
 2、换成uart2之后，串口不卡，led流水灯代码中间的
         LOG_D("Hello RT-Thread!");
        rt_pin_write(LED_PIN_NUM, PIN_HIGH);
        rt_thread_mdelay(1000);
        rt_pin_write(LED_PIN_NUM, PIN_LOW);
        LOG_D("Hello RT-Thread!");
        rt_thread_mdelay(1000);
  mdelay函数没出来过。
  
附时钟设置函数
void system_clock_config(int target_freq_mhz)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

/** Initializes the CPU, AHB and APB busses clocks
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
//    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
//    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
//    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
//    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
    RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
    /** Initializes the CPU, AHB and APB busses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                             |RCC_CLOCKTYPE_PCLK1;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
    {
        Error_Handler();
    }
}