Posted on June 04, 2014 at 15:53
This is how I might present an example, a somewhat blind implementation but should be functional
/* TIM14 1 Hz Toggle STM32F0 sourcer32@gmail.com */
#include ''stm32f0xx.h''
/***************************************************************************/
void RCC_Configuration(void)
{
/* GPIOC Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
/* TIM14 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
}
/***************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC, GPIO_Pin_8);
GPIO_ResetBits(GPIOC, GPIO_Pin_9);
}
/***************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the TIM14 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM14_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/***************************************************************************/
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t) (SystemCoreClock / 1000) - 1; // To KHz
TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // To Hz
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStructure);
/* TIM Interrupts enable */
TIM_ITConfig(TIM14, TIM_IT_Update, ENABLE);
/* TIM14 enable counter */
TIM_Cmd(TIM14, ENABLE);
}
/***************************************************************************/
void TIM14_IRQHandler(void)
{
if (TIM_GetITStatus(TIM14, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM14, TIM_IT_Update);
/* LED toggling */
GPIOC->ODR ^= GPIO_Pin_8 | GPIO_Pin_9;
}
}
/***************************************************************************/
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
TIM_Configuration();
/* Infinite loop */
while (1);
}
/***************************************************************************/
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d
'', file, line) */
/* Infinite loop */
while (1)
{}
}
#endif
/***************************************************************************/
