Posted by fronders on 2017-03-10 15:13

This bug was introduced by CubeMX v4.20.
In SystemClock_Config() function, when HSE is selected it generates code:

RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;

/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}

Notice the OscillatorType filed is initialized for BOTH HSI and HSE, while later field HSIState is never set.

So you have two solutions:

• either remove RCC_OSCILLATORTYPE_HSI for the line to be like this:
  • RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
• or add HSIState field like this:
  • RCC_OscInitStruct.HSIState = RCC_HSI_ON;

I hope they will fix this ASAP, as you have to edit SystemClock_Config() every time the project is regenerated..