Error: No STM32 target found!怎么办

发布于 2020-09-28 09:36:03 浏览：5514 订阅该版

```
ST-LINK SN  : 001B002C3137511233333639
ST-LINK FW  : V3J5M2
Voltage     : 3.30V
Error: ST-LINK error (DEV_TARGET_CMD_ERR)
2nd connect tentative with a lower frequency (8MHz)
ST-LINK SN  : 001B002C3137511233333639
ST-LINK FW  : V3J5M2
Voltage     : 3.31V
Error: No STM32 target found!
执行完毕, 耗时：182ms.
```

我在cubemx中改了时钟配置
![QQ截图20200928091807.png](/uploads/20200928/a1541f122df68ed6fd16dc9531b449c9.png)
然后将生成的代码
```c
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

/** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV128;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV16;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the peripherals clocks
  */
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LPUART1;
  PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PCLK1;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}
```
替换我RT STUDIO工程文件的drv_clk.c 的 void system_clock_config(int target_freq_mhz)函数中. 
然后构建下载就一直找不到STM32,目标好像是频率的问题,我重新创建工程同样也不能下载调试,用keil,可以下载但是不能调试,我应该怎么做呢.

stlink是好的 驱动没问题 板子是STM32G431RB