void HAL_RCC_MCOConfig( uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv) {
GPIO_InitTypeDef GPIO_InitStruct;
/* Check the parameters */
assert_param(IS_RCC_MCO(RCC_MCOx));
assert_param(IS_RCC_MCODIV(RCC_MCODiv));
assert_param(IS_RCC_MCO1SOURCE(RCC_MCOSource));
/* MCO Clock Enable */
__MCO1_CLK_ENABLE();
/* Configure the MCO1 pin in alternate function mode */
if (RCC_MCOx == RCC_MCO1) {
GPIO_InitStruct.Pin = MCO1_PIN;
}
else {
GPIO_InitStruct.Pin = MCO2_PIN;
}
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Alternate = GPIO_AF0_MCO;
HAL_GPIO_Init(MCO1_GPIO_PORT, &GPIO_InitStruct);
/* Mask MCO1 and MCO1PRE[2:0] bits then Select MCO1 clock source and prescaler */
MODIFY_REG(RCC->CFGR, (RCC_CFGR_MCOSEL | RCC_CFGR_MCO_PRE), ((RCC_MCOSource << 24 | RCC_MCODiv )));
}
/**
* @brief Selects the clock source to output on MCO pin.
* @note MCO pin should be configured in alternate function mode.
* @param RCC_MCOx: specifies the output direction for the clock source.
* This parameter can be one of the following values:
* @arg RCC_MCO: Clock source to output on MCO1 pin(PA8).
* @param RCC_MCOSource: specifies the clock source to output.
* This parameter can be one of the following values:
* @arg RCC_MCO1SOURCE_NOCLOCK: No clock selected
* @arg RCC_MCO1SOURCE_SYSCLK: System clock selected as MCO source
* @arg RCC_MCO1SOURCE_HSI: HSI oscillator clock selected
* @arg RCC_MCO1SOURCE_HSE: HSE oscillator clock selected
* @arg RCC_MCO1SOURCE_PLLCLK: PLL clock divided by 2 selected as MCO source
* @arg RCC_MCO1SOURCE_PLL2CLK: PLL2 clock selected as MCO source (only for connectivity line devices)
* @arg RCC_MCO1SOURCE_PLL3CLK_DIV2: PLL3 clock divided by 2 selected as MCO source (only for connectivity line devices)
* @arg RCC_MCO1SOURCE_EXT_HSE: XT1 external 3-25 MHz oscillator clock selected as MCO source (only for connectivity line devices)
* @arg RCC_MCO1SOURCE_PLL3CLK: PLL3 clock selected as MCO source (only for connectivity line devices)
* @param RCC_MCODiv: specifies the MCO DIV.
* This parameter can be one of the following values:
* @arg RCC_MCODIV_1: no division applied to MCO clock
* @retval None
*/
void HAL_RCC_MCOConfig(uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv)
{
GPIO_InitTypeDef gpio;
/* Check the parameters */
assert_param(IS_RCC_MCO(RCC_MCOx));
assert_param(IS_RCC_MCODIV(RCC_MCODiv));
assert_param(IS_RCC_MCO1SOURCE(RCC_MCOSource));
/* MCO Clock Enable */
MCO1_CLK_ENABLE();
/* Configure the MCO1 pin in alternate function mode */
gpio.Pin = MCO1_PIN;
gpio.Mode = GPIO_MODE_AF_PP;
gpio.Speed = GPIO_SPEED_HIGH;
gpio.Pull = GPIO_NOPULL;
HAL_GPIO_Init(MCO1_GPIO_PORT, &gpio);
/* Mask MCO and MCOPRE[2:0] bits then Select MCO clock source and prescaler */
MODIFY_REG(RCC->CFGR, RCC_CFGR_MCO, RCC_MCOSource);
}
/**
* @brief Selects the clock source to output on MCO pin(such as PA8).
* @note MCO pin (such as PA8) should be configured in alternate function mode.
* @param RCC_MCOx: specifies the output direction for the clock source.
* This parameter can be one of the following values:
* @arg RCC_MCO: Clock source to output on MCO pin(such as PA8).
* @param RCC_MCOSource: specifies the clock source to output.
* This parameter can be one of the following values:
* @arg RCC_MCOSOURCE_LSI: LSI clock selected as MCO source
* @arg RCC_MCOSOURCE_HSI: HSI clock selected as MCO source
* @arg RCC_MCOSOURCE_LSE: LSE clock selected as MCO source
* @arg RCC_MCOSOURCE_HSE: HSE clock selected as MCO source
* @arg RCC_MCOSOURCE_PLLCLK_DIV2: main PLL clock divided by 2 selected as MCO source
* @arg RCC_MCOSOURCE_SYSCLK: System clock (SYSCLK) selected as MCO source
* @param RCC_MCODiv: specifies the MCOx prescaler.
* This parameter can be one of the following values:
* @arg RCC_MCO_NODIV: no division applied to MCO clock
* @retval None
*/
void HAL_RCC_MCOConfig(uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv)
{
GPIO_InitTypeDef gpio;
/* Check the parameters */
assert_param(IS_RCC_MCO(RCC_MCOx));
assert_param(IS_RCC_MCODIV(RCC_MCODiv));
/* RCC_MCO */
assert_param(IS_RCC_MCOSOURCE(RCC_MCOSource));
/* MCO Clock Enable */
__MCO_CLK_ENABLE();
/* Configue the MCO pin in alternate function mode */
gpio.Pin = MCO_PIN;
gpio.Mode = GPIO_MODE_AF_PP;
gpio.Speed = GPIO_SPEED_HIGH;
gpio.Pull = GPIO_NOPULL;
gpio.Alternate = GPIO_AF0_MCO;
HAL_GPIO_Init(MCO_GPIO_PORT, &gpio);
/* Configure the MCO clock source */
__HAL_RCC_MCO_CONFIG(RCC_MCOSource, RCC_MCODiv);
}
