/** Set interrupt for specified timestamp
*
* @param timestamp The time in ticks to be set
*/
void lp_ticker_set_interrupt(timestamp_t timestamp)
{
if (timestamp == 0) {
timestamp = 1;
}
GPT_StopTimer(GPT2);
GPT_SetOutputCompareValue(GPT2, kGPT_OutputCompare_Channel1, timestamp);
GPT_ClearStatusFlags(GPT2, kGPT_OutputCompare1Flag);
GPT_EnableInterrupts(GPT2, kGPT_OutputCompare1InterruptEnable);
GPT_StartTimer(GPT2);
}
void GPT1_IRQHandler(void)
{
if (GPT_GetStatusFlags(GPT1, kGPT_OutputCompare1Flag) != 0)
{
GPT_ClearStatusFlags(GPT1, kGPT_OutputCompare1Flag);
rt_device_hwtimer_isr(&GPT_timer1);
}
/* Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F, Cortex-M7, Cortex-M7F Store immediate overlapping
exception return operation might vector to incorrect interrupt */
#if defined __CORTEX_M && (__CORTEX_M == 4U || __CORTEX_M == 7U)
__DSB();
#endif
}
static void gpt_isr(void)
{
GPT_ClearStatusFlags(GPT2, kGPT_OutputCompare1Flag);
GPT_DisableInterrupts(GPT2, kGPT_OutputCompare1InterruptEnable);
lp_ticker_irq_handler();
}
/** Clear the low power ticker interrupt
*
*/
void lp_ticker_clear_interrupt(void)
{
GPT_ClearStatusFlags(GPT2, kGPT_OutputCompare1Flag);
}
