سلام دوستان و اساتید
برای شمارش پالس های خروجی از میکرو stm32f103 و کد زیر در حالت external timer interrupt استفاده کردم
در فرکانس های پایین مثلا 100Hz جواب میده
ولی بالاتر ازون کمترمیشمره (واسه پالس های 10ms تقریبا 50 سیکل عقب میافته)
مشکل نمیفهمم از کجاست
اساتید لطفاااا کمک کنید
سپاس
void Configure_PA(void) {
GPIO_InitTypeDef GPIO_InitStruct;
EXTI_InitTypeDef EXTI_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;//IPU;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10 | GPIO_Pin_9 | GPIO_Pin_8;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource11);
EXTI_InitStruct.EXTI_Line = EXTI_Line11; // EXTI15_10_IRQn
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
/* Triggers on rising and falling edge */
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStruct);
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStruct.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0x00;
/* Set sub priority */
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* PD0 is connected to EXTI_Line0, which has EXTI0_IRQn vector */
NVIC_InitStruct.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource10);
EXTI_InitStruct.EXTI_Line = EXTI_Line10;
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStruct);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource9);
EXTI_InitStruct.EXTI_Line = EXTI_Line9;
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStruct);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource8);
EXTI_InitStruct.EXTI_Line = EXTI_Line8;
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStruct);
}
/* Handle Digital Input interrupts */
void EXTI15_10_IRQHandler(void) {
if (EXTI_GetITStatus(EXTI_Line11) != RESET) {
CounterCh[1]++;
EXTI_ClearITPendingBit(EXTI_Line11);
}
if (EXTI_GetITStatus(EXTI_Line10) != RESET) {
CounterCh[2]++;
EXTI_ClearITPendingBit(EXTI_Line10);
}
}
void EXTI9_5_IRQHandler(void) {
if (EXTI_GetITStatus(EXTI_Line9) != RESET) {
CounterCh[3]++;
EXTI_ClearITPendingBit(EXTI_Line9);
}
if (EXTI_GetITStatus(EXTI_Line8) != RESET) {
CounterCh[4]++;
EXTI_ClearITPendingBit(EXTI_Line8);
}
}