STM32L15x Microcontroller Clock Output Enable

[valeriogiampa]

Posted on March 24, 2012 at 20:13

I would like to see the System Clock of my STM32L152.

For this reason, I have included in my project this function:  /* Enable External Clock Output MCO on Pin48 - GPIOA.8 */  // Addizionale   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | GPIO_Pin_8, ENABLE);  /* Configure User Button pin as Alternative Function */   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;   GPIO_InitStructure.GPIO_Mode = GPIO_AF_MCO;   //GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;   GPIO_Init(GPIOA, &GPIO_InitStructure);   /* Configura l'RCC per estrarre il clock desiderato */   RCC_MCOConfig(RCC_MCOSource_SYSCLK , RCC_MCODiv_16); But, I don't see any signal on the Pin PA.8. Can anyone help me? #stm32-mco-clock-output

[Tesla DeLorean]

Posted on March 24, 2012 at 23:04

The syntax of much of that looks wrong.

Perhaps:

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_MCO);
RCC_MCOConfig(RCC_MCOSource_SYSCLK , RCC_MCODiv_16);