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Avoid race condition in clearing TC interrupt flags

master^2
Michal Moskal 2017-06-15 13:05:59 +01:00
parent 03f4fbc253
commit 6c250bb0e7
1 changed files with 4 additions and 8 deletions
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12
targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/tc/tc_interrupt.c
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@ -114,35 +114,31 @@ void _tc_interrupt_handler(
module->register_callback_mask &
module->enable_callback_mask;
/* Clear all interrupt flags, before we start setting callbacks, which can take a long
* time during which the timer might trigger again. */
module->hw->COUNT8.INTFLAG.reg = interrupt_and_callback_status_mask;
/* Check if an Overflow interrupt has occurred */
if (interrupt_and_callback_status_mask & TC_INTFLAG_OVF) {
/* Invoke registered and enabled callback function */
(module->callback[TC_CALLBACK_OVERFLOW])(module);
/* Clear interrupt flag */
module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_OVF;
}
/* Check if an Error interrupt has occurred */
if (interrupt_and_callback_status_mask & TC_INTFLAG_ERR) {
/* Invoke registered and enabled callback function */
(module->callback[TC_CALLBACK_ERROR])(module);
/* Clear interrupt flag */
module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_ERR;
}
/* Check if an Match/Capture Channel 0 interrupt has occurred */
if (interrupt_and_callback_status_mask & TC_INTFLAG_MC(1)) {
/* Invoke registered and enabled callback function */
(module->callback[TC_CALLBACK_CC_CHANNEL0])(module);
/* Clear interrupt flag */
module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_MC(1);
}
/* Check if an Match/Capture Channel 1 interrupt has occurred */
if (interrupt_and_callback_status_mask & TC_INTFLAG_MC(2)) {
/* Invoke registered and enabled callback function */
(module->callback[TC_CALLBACK_CC_CHANNEL1])(module);
/* Clear interrupt flag */
module->hw->COUNT8.INTFLAG.reg = TC_INTFLAG_MC(2);
}
}