Posted on March 23, 2017 at 10:33
Hello Glen,
this is a bug I found it yesterday too. Go to your main.c file and removeRCC_OSCILLATORTYPE_HSI on line 133.
This happens if you have setup HSI clock first, export project and later setup HSE clock as source.
Why it fails?
Because configuration for HSIState and HSICalibrationValue are missing now (removed from CubeMX generation tool) and have unknown value and assert_param goes to assert_failed function. When you removeRCC_OSCILLATORTYPE_HSI from first line, configuration won't try to init HSI clock.
How to reproduce the bug:
- Create new empty project (In my case I used STM32F746) in CubeMX
- In RCC IP add HSIexternal crystal mode
- Go to clock control and select HSIas PLL source and configure PLL
- Export project, open in IDE, compile and run.
- Project will work with HSI (High Speed Internal) clock.
- Go back to CubeMX and in the same project configure HSE value as PLL source
- Export and look at main.c where clock configuration is setup.
- You will still seeRCC_OSCILLATORTYPE_HSI for OscillatorType.
- It means that we still want to init HSI clock
- But there is no HSIState and HSICalibrationValue parameters in initialization structure
- FunctionHAL_RCC_OscConfig will try to init HSE and HSI and it will fail at HSI setup because of missing HSI important parameters.
First code export
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON; //HSI State is here
RCC_OscInitStruct.HSICalibrationValue = 0; //HSI calibration value is here
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 432;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}�?�?�?�?�?�?�?�?�?�?�?�?�?
Second code export
//HSI is still here for oscillator type, but there are missing important HSI parameters
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;
//missing here
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 25;
RCC_OscInitStruct.PLL.PLLN = 432;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
//First line should be
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?
