Posted on May 30, 2018 at 13:09Hi!
I need time-delayed interrupt using TIM1 in my STM8S105K4 project in IAR free IDE
TIM2 & TIM3 already in use.
void SetupTimer1(){
#define TIM1_PRESCALER 16000L
// once 1 msec
TIM1_PSCRH = (unsigned char)(TIM1_PRESCALER>>8);
TIM1_PSCRL = (unsigned char)(TIM1_PRESCALER);
#define TIM1_LIMIT 1000L
// once 1 sec
TIM1_ARRH = (unsigned char)(TIM1_LIMIT>>8);
TIM2_ARRL = (unsigned char)(TIM1_LIMIT);
}
void StartTimer1(){
TIM1_CR1_OPM = 1; // One Pulse Mode enabled
TIM1_CR1_URS = 1;
TIM1_IER_UIE = 1;
TIM1_CR1_CEN = 1;
}
void StopTimer1(){
TIM1_SR1_UIF = 0;
TIM1_CR1 = 0;
TIM1_SR1 = 0;
}
#pragma vector = TIM1_OVR_UIF_vector
__interrupt void TIM1_OVR_UIF_handler(void){
if (TIM1_SR1_UIF == 1){
StopTimer1();
// do something….
}
}
\
void OnExternalEvent(){
……
StartTimer1();
.......
}
What is wrong?
Interrupt occurred once soon after call StartTimer1(), without 1 sec delay.
