void TPM_LED_HANDLER(void)
{
tpmIsrFlag = true;
if (brightnessUp)
{
/* Increase duty cycle until it reach limited value, don't want to go upto 100% duty cycle
* as channel interrupt will not be set for 100%
*/
if (++updatedDutycycle >= 99U)
{
updatedDutycycle = 99U;
brightnessUp = false;
}
}
else
{
/* Decrease duty cycle until it reach limited value */
if (--updatedDutycycle == 1U)
{
brightnessUp = true;
}
}
/* Clear interrupt flag.*/
TPM_ClearStatusFlags(BOARD_TPM_BASEADDR, TPM_CHANNEL_FLAG);
}
void us_ticker_set_interrupt(timestamp_t timestamp)
{
/* We get here absolute interrupt time which takes into account counter overflow.
* Since we use additional count-down timer to generate interrupt we need to calculate
* load value based on time-stamp.
*/
const uint32_t now_ticks = us_ticker_read();
uint32_t delta_ticks =
timestamp >= now_ticks ? timestamp - now_ticks : (uint32_t)((uint64_t) timestamp + 0xFFFFFFFF - now_ticks);
if (delta_ticks == 0) {
/* The requested delay is less than the minimum resolution of this counter. */
delta_ticks = 1;
}
us_ticker_int_counter = (uint32_t)(delta_ticks >> 16);
us_ticker_int_remainder = (uint16_t)(0xFFFF & delta_ticks);
TPM_StopTimer(TPM2);
TPM2->CNT = 0;
if (us_ticker_int_counter > 0) {
TPM2->MOD = 0xFFFF;
us_ticker_int_counter--;
} else {
TPM2->MOD = us_ticker_int_remainder;
us_ticker_int_remainder = 0;
}
/* Clear the count and set match value */
TPM_ClearStatusFlags(TPM2, kTPM_TimeOverflowFlag);
TPM_EnableInterrupts(TPM2, kTPM_TimeOverflowInterruptEnable);
TPM_StartTimer(TPM2, kTPM_SystemClock);
}
void StackTimer_ClearIntFlag(void)
{
#if FSL_FEATURE_SOC_FTM_COUNT
uint32_t status = FTM_GetStatusFlags(mFtmBase[gStackTimerInstance_c]);
FTM_ClearStatusFlags(mFtmBase[gStackTimerInstance_c], status);
#else
uint32_t status = TPM_GetStatusFlags(mTpmBase[gStackTimerInstance_c]);
TPM_ClearStatusFlags(mTpmBase[gStackTimerInstance_c], status);
#endif
}
static void tpm_isr(void)
{
// Clear the TPM timer overflow flag
TPM_ClearStatusFlags(TPM2, kTPM_TimeOverflowFlag);
TPM_StopTimer(TPM2);
if (us_ticker_int_counter > 0) {
TPM2->MOD = 0xFFFF;
TPM_StartTimer(TPM2, kTPM_SystemClock);
us_ticker_int_counter--;
} else {
if (us_ticker_int_remainder > 0) {
TPM2->MOD = us_ticker_int_remainder;
TPM_StartTimer(TPM2, kTPM_SystemClock);
us_ticker_int_remainder = 0;
} else {
// This function is going to disable the interrupts if there are
// no other events in the queue
us_ticker_irq_handler();
}
}
}
void us_ticker_clear_interrupt(void)
{
TPM_ClearStatusFlags(TPM2, kTPM_TimeOverflowFlag);
}