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Update timer handling to support multiple events at the same time.

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This can occur when servicing two software serial ports via a multiple
timer channels on the same channel.
This commit is contained in:
Dominic Clifton 2014-04-07 20:13:09 +01:00
parent e2deeeebd3
commit aef3c6ad97
1 changed files with 28 additions and 24 deletions
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52
src/drv_timer.c
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@ -181,36 +181,40 @@ static void timCCxHandler(TIM_TypeDef *tim)
uint16_t capture;
timerConfig_t *timerConfig;
if (TIM_GetITStatus(tim, TIM_IT_CC1) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC1);
uint8_t channelIndex = 0;
for (channelIndex = 0; channelIndex < CC_CHANNELS_PER_TIMER; channelIndex++) {
uint8_t channel = channels[channelIndex];
timerConfig = findTimerConfig(tim, TIM_Channel_1);
capture = TIM_GetCapture1(tim);
} else if (TIM_GetITStatus(tim, TIM_IT_CC2) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC2);
if (channel == TIM_Channel_1 && TIM_GetITStatus(tim, TIM_IT_CC1) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC1);
timerConfig = findTimerConfig(tim, TIM_Channel_2);
capture = TIM_GetCapture2(tim);
} else if (TIM_GetITStatus(tim, TIM_IT_CC3) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC3);
timerConfig = findTimerConfig(tim, TIM_Channel_1);
capture = TIM_GetCapture1(tim);
} else if (channel == TIM_Channel_2 && TIM_GetITStatus(tim, TIM_IT_CC2) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC2);
timerConfig = findTimerConfig(tim, TIM_Channel_3);
capture = TIM_GetCapture3(tim);
} else if (TIM_GetITStatus(tim, TIM_IT_CC4) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC4);
timerConfig = findTimerConfig(tim, TIM_Channel_2);
capture = TIM_GetCapture2(tim);
} else if (channel == TIM_Channel_3 && TIM_GetITStatus(tim, TIM_IT_CC3) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC3);
timerConfig = findTimerConfig(tim, TIM_Channel_4);
capture = TIM_GetCapture4(tim);
} else {
return; // avoid uninitialised variable dereference
timerConfig = findTimerConfig(tim, TIM_Channel_3);
capture = TIM_GetCapture3(tim);
} else if (channel == TIM_Channel_4 && TIM_GetITStatus(tim, TIM_IT_CC4) == SET) {
TIM_ClearITPendingBit(tim, TIM_IT_CC4);
timerConfig = findTimerConfig(tim, TIM_Channel_4);
capture = TIM_GetCapture4(tim);
} else {
continue; // avoid uninitialised variable dereference
}
if (!timerConfig->callback) {
continue;
}
timerConfig->callback(timerConfig->reference, capture);
}
if (!timerConfig->callback) {
return;
}
timerConfig->callback(timerConfig->reference, capture);
}
void TIM1_CC_IRQHandler(void)
{
timCCxHandler(TIM1);