Posted on November 19, 2013 at 17:28I have a problem with my Interrupt priority....
My TIM3 is called every 5ms and have high priority
and my TIM2 every 1ms have low priority
and everytime my TIM2 is called. I want Interrupt TIM2 when TIM3 is active
where is the problem ?
void Config_Timer_TIM2(TIM_TimeBaseInitTypeDef *TIM_TimeBaseStructure, NVIC_InitTypeDef *NVIC_InitStructure)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* Enable the Timer2 Interrupt */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure->NVIC_IRQChannel = TIM2_IRQn; // configure the Timer2 interrupts
NVIC_InitStructure->NVIC_IRQChannelPreemptionPriority = 0x0F; // sets the priority group of the TIMER2 interrupts
NVIC_InitStructure->NVIC_IRQChannelSubPriority = 0; // set the subpriority inside the group
NVIC_InitStructure->NVIC_IRQChannelCmd = ENABLE; // TIMER2 interrupts are globally enabled
NVIC_Init(NVIC_InitStructure);
/* Configure Timer which is every 1 ms active*/
TIM_DeInit(TIM2);
TIM_TimeBaseStructInit(TIM_TimeBaseStructure);
/* Time base configuration */
TIM_TimeBaseStructure->TIM_Prescaler = 360 - 1; // 72 MHz / 360 = 200 khz
TIM_TimeBaseStructure->TIM_Period = 200 - 1; // (1/200khz) * 200 = 1 ms;
TIM_TimeBaseStructure->TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure->TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, TIM_TimeBaseStructure);
//TIM_PrescalerConfig(TIM2, 360-1 , TIM_PSCReloadMode_Immediate);
/* Enable TIM2 Update Interrupt */
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
/* Enable TIM2 */
TIM_Cmd(TIM2,ENABLE);
}
void Config_Timer_TIM3(TIM_TimeBaseInitTypeDef *TIM_TimeBaseStructure, NVIC_InitTypeDef *NVIC_InitStructure)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* Enable the Timer3 Interrupt */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure->NVIC_IRQChannel = TIM3_IRQn; // configure the Timer2 interrupts
NVIC_InitStructure->NVIC_IRQChannelPreemptionPriority = 0 ; // sets the priority group of the TIMER2 interrupts
NVIC_InitStructure->NVIC_IRQChannelSubPriority = 0; // set the subpriority inside the group
NVIC_InitStructure->NVIC_IRQChannelCmd = ENABLE; // TIMER3 interrupts are globally enabled
NVIC_Init(NVIC_InitStructure);
/* Configure Timer which is every 5 ms active*/
TIM_DeInit(TIM3);
TIM_TimeBaseStructInit(TIM_TimeBaseStructure);
/* Time base configuration */
TIM_TimeBaseStructure->TIM_Prescaler = 1800 - 1; // 72 MHz / 1800 = 40 khz
TIM_TimeBaseStructure->TIM_Period = 200 - 1; // (1/400khz) * 200 = 5 ms;
TIM_TimeBaseStructure->TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure->TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, TIM_TimeBaseStructure);
/* Enable TIM2 Update Interrupt */
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
void TIM2_IRQHandler(void)
{
Display_Adc_Value(Line7,Black,Line3,Green,ADC1);
Display_Adc_Value(Line8,Black,Line5,Blue,ADC2);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update); //Update Interrupt
}
void TIM3_IRQHandler(void)
{
UARTSend(''CV'', 1);
// if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
// {
//
// }
TIM_ClearITPendingBit(TIM3, TIM_IT_Update); //Update Interrupt
}
