Master Clock Output issue

Posted on November 12, 2016 at 20:34

I configured RCC Master Clock Output within cubeMX 4.0 and using a STM32F

The generated Code does not output the selected clock.

I have found, after code analysis of generated file gpio.c, that the Alternate function for PA8 in MX_GPIO_Init() is not as expected.

/*Configure GPIO pin : PA8 */

GPIO_InitStruct.Pin = GPIO_PIN_8;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;

GPIO_InitStruct.Alternate =

GPIO_AF0_TRACE;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

After changing the Alternate Function of PA8 to

GPIO_InitStruct.Alternate =

GPIO_AF0_MCO;

the Master Clock Output works as expected.

Regards AB

cubemx stm32f303