/**
* @brief EXTI line detection callbacks.
* @param GPIO_Pin: Specifies the pins connected EXTI line
* @retval None
*/
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if(GPIO_Pin == KEY_BUTTON_PIN)
{
if(__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSI)
{
/* Set SYSCLK frequency to 180 MHz, coming from the PLL which is clocked by the HSE */
SystemClockHSE_Config();
}
else /* PLL source is HSE oscillator */
{
/* Set SYSCLK frequency to 180 MHz, coming from the PLL which is clocked by the HSI */
SystemClockHSI_Config();
}
}
}
/**
* @brief switch in system clock out of ISR context.
* @retval None
*/
static void SwitchSystemClock(void)
{
if (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSI)
{
/* PLL source is HSI oscillator */
/* Set SYSCLK frequency to 216 MHz, coming from the PLL which is clocked by HSE */
SystemClockHSE_Config();
}
else if (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSE)
{
/* PLL source is HSE oscillator */
/* Set SYSCLK frequency to 216 MHz, coming from the PLL which is clocked by HSI */
SystemClockHSI_Config();
}
/* reset global variable */
SwitchClock = RESET;
}
