static void
apollo2_os_tick_handler(void)
{
uint32_t cur;
int os_ticks;
int delta;
os_sr_t sr;
OS_ENTER_CRITICAL(sr);
/* Calculate elapsed ticks and advance OS time. */
cur = am_hal_stimer_counter_get();
delta = cur - apollo2_os_tick_prev;
os_ticks = delta / apollo2_os_tick_dur;
os_time_advance(os_ticks);
/* Clear timer interrupt. */
am_hal_stimer_int_clear(AM_HAL_STIMER_INT_COMPAREA);
/* Update the time associated with the most recent tick. */
apollo2_os_tick_prev += os_ticks * apollo2_os_tick_dur;
/* Schedule timer to interrupt at the next tick. */
apollo2_os_tick_set_timer(1);
OS_EXIT_CRITICAL(sr);
}
static void
nrf52_timer_handler(void)
{
int delta;
int ticks;
os_sr_t sr;
uint32_t counter;
os_trace_enter_isr();
OS_ENTER_CRITICAL(sr);
/* Calculate elapsed ticks and advance OS time. */
counter = nrf52_os_tick_counter();
delta = sub24(counter, g_hal_os_tick.lastocmp);
ticks = delta / g_hal_os_tick.ticks_per_ostick;
os_time_advance(ticks);
/* Clear timer interrupt */
OS_TICK_TIMER->EVENTS_COMPARE[OS_TICK_CMPREG] = 0;
/* Update the time associated with the most recent tick */
g_hal_os_tick.lastocmp = (g_hal_os_tick.lastocmp +
(ticks * g_hal_os_tick.ticks_per_ostick)) & 0xffffff;
/* Update the output compare to interrupt at the next tick */
nrf52_os_tick_set_ocmp(g_hal_os_tick.lastocmp + g_hal_os_tick.ticks_per_ostick);
OS_EXIT_CRITICAL(sr);
os_trace_exit_isr();
}
void
timer_interrupt_handler(void)
{
uint64_t time = get_timer_value();
int delta = (int)(time - last_tick_time);
last_tick_time = time;
int ticks = delta / ticks_per_ostick;
set_mtimecmp(time + ticks_per_ostick);
os_time_advance(ticks);
}
/*
* LPTMR irq handler
*
* This IRQ handles OS time. Currently, this MCU does not have the tickless
* OS implemented. It is also possible to miss OS ticks if interrupts are
* disabled for too long (longer than one tick).
*/
static void
mkw41z_os_tick_handler(void)
{
uint32_t csr;
uint32_t sr;
OS_ENTER_CRITICAL(sr);
/* Must make sure flag is set when we get interrupt */
csr = LPTMR0->CSR;
if (csr & LPTMR_CSR_TCF_MASK) {
/* Advance os time */
os_time_advance(1);
/* Clear mask */
LPTMR0->CSR = csr;
}
OS_EXIT_CRITICAL(sr);
}
void
timer_handler(void)
{
os_time_advance(1);
}