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STM32F429BIT6 HSE Oscillator problem

Question asked by Regan.David on May 24, 2016
Latest reply on May 25, 2016 by Regan.David
Hi

I am having problems getting the external crystal oscillator to run correctly.

It has a dc offset of approx. 1.5V but a peak to peak of only 380mV.

The circuit is based on the STM32F429 Discovery board which produces a
very healthy clock.

Can anybody suggest what may be the cause of this issue.

The clock config code is

__PWR_CLK_ENABLE();

 

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

 

  

 

//Configure HSE clock for main system clock

 

RCC_OscInitStruct.

OscillatorType = RCC_OSCILLATORTYPE_HSE;

 

RCC_OscInitStruct.

HSEState = RCC_HSE_ON;

 

RCC_OscInitStruct.

PLL.PLLState = RCC_PLL_ON;

 

RCC_OscInitStruct.

PLL.PLLSource = RCC_PLLSOURCE_HSE;

 

RCC_OscInitStruct.

PLL.PLLM = 8;

 

RCC_OscInitStruct.

PLL.PLLN = 336;

 

RCC_OscInitStruct.

PLL.PLLP = RCC_PLLP_DIV2;

 

RCC_OscInitStruct.

PLL.PLLQ = 7;

 

 

HAL_RCC_OscConfig(&RCC_OscInitStruct);

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