I'm using a nucleo F446RE. I want to set up MCO1 as 42MHz output. CUBEmx generated the the HAL_RCC_MCOConfig function below.void HAL_RCC_MCOConfig(uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv)
{
GPIO_InitTypeDef GPIO_InitStruct;
...