/* If FreeRTOS is not running, then we rely on RIT service to call this function,
* otherwise we rely on FreeRTOS tick hook to provide system timer
*/
static void hl_periodic_service(void)
{
sys_watchdog_feed();
/* If FreeRTOS is running, user should use a dedicated task to call mesh service,
* so we will not call it if freertos is running
*/
if (taskSCHEDULER_RUNNING == xTaskGetSchedulerState()) {
g_system_uptime_ms += MS_PER_TICK();
/* We don't need RIT if FreeRTOS is running */
if (sys_rit_running()) {
sys_rit_disable();
/* The timer value so far may be an odd number, and if MS_PER_TICK() is not 1
* then we may increment it like 12, 22, 32, etc. so round this number once.
*/
g_system_uptime_ms = (g_system_uptime_ms / 10) * 10;
}
}
else {
g_system_uptime_ms += g_time_per_rit_isr_ms;
wireless_service();
/**
* Small hack to support interrupts if FreeRTOS is not running :
* FreeRTOS API resets our base priority register, then all
* interrupts higher priority than IP_SYSCALL will not get locked out.
* @see more notes at isr_priorities.h. @see IP_SYSCALL
*/
__set_BASEPRI(0);
}
}
/* If FreeRTOS is not running, then we rely on rit service to call this function,
* otherwise we rely on FreeRTOS tick hook to provide system timer
*/
static void hl_periodic_service(void)
{
const uint32_t timer_ms = sys_get_uptime_ms();
/* If FreeRTOS is running, user should use a dedicated task to call mesh service,
* so we will not call it if freertos is running
*/
if (taskSCHEDULER_RUNNING == xTaskGetSchedulerState()) {
m_system_uptime_ms += MS_PER_TICK();
/* We don't need RIT if FreeRTOS is running */
if (sys_rit_running()) {
sys_rit_disable();
/* Round up uptime_ms because if ms per tick is 10, then we don't want to
* increment this timer by 10 from an odd number because % 10 won't work.
*/
m_system_uptime_ms = (m_system_uptime_ms / 10) * 10;
}
}
else {
m_system_uptime_ms += m_time_per_rit_isr_ms;
wireless_service();
/**
* Small hack to support interrupts if FreeRTOS is not running :
* FreeRTOS API resets our base priority register, then all
* interrupts higher priority than IP_SYSCALL will not get locked out.
* @see more notes at isr_priorities.h. @see IP_SYSCALL
*/
__set_BASEPRI(0);
}
/**
* Call SD timer function at 100Hz.
* Feed the watchdog too while we're at it.
*/
if (0 == (timer_ms % 10)) {
sd_timerproc();
sys_watchdog_feed();
}
}
void TIMERX_BAD_IRQHandler()
#endif
{
enum {
timer_mr0_intr = (1 << 0),
timer_mr1_intr = (1 << 1),
timer_mr2_intr = (1 << 2),
timer_mr3_intr = (1 << 3),
timer_capt0_intr = (1 << 4),
timer_capt1_intr = (1 << 5),
};
const uint32_t intr_reason = gp_timer_ptr->IR;
#if (1 == SYS_CFG_SYS_TIMER)
/* TODO: Call capture ISR callback for IR receiver */
if (intr_reason & timer_capt0_intr)
{
gp_timer_ptr->IR = timer_capt0_intr;
// Setup timeout of IR signal (unless we reset it again)
gp_timer_ptr->MR2 = 10000 + gp_timer_ptr->TC;
}
/* TODO MR2: End of IR capture (no IR capture after initial IR signal) */
else if (intr_reason & timer_mr2_intr)
{
gp_timer_ptr->IR = timer_mr2_intr;
}
/* MR0 is used for the timer rollover count */
else
#endif
if(intr_reason & timer_mr0_intr)
{
gp_timer_ptr->IR = timer_mr0_intr;
++g_timer_rollover_count;
}
/* MR1 is used as a periodic interrupt to service background tasks and reset watchdog */
else if(intr_reason & timer_mr1_intr)
{
gp_timer_ptr->IR = timer_mr1_intr;
/* Setup the next periodic interrupt */
gp_timer_ptr->MR1 += g_periodic_isr_time_value_us;
/* In case someone else (you) spent too long inside another isr, we may not be able
* to set the MR1 correctly since the TC may have already past our next MR1, so in
* this case, make an adjustment.
*/
if (gp_timer_ptr->MR1 < gp_timer_ptr->TC) {
gp_timer_ptr->MR1 += (g_periodic_isr_time_value_us + gp_timer_ptr->TC);
}
/* If no one feeds watchdog interrupt, we will watchdog reset. We are using a periodic ISR
* to feed watchdog because if a critical exception hits, it will enter while(1) loop inside
* the interrupt, and since watchdog won't reset, it will trigger system reset.
*/
sys_watchdog_feed();
// Service the background task if FreeRTOS is not running
if ((taskSCHEDULER_RUNNING != xTaskGetSchedulerState())) {
sys_background_service();
}
/**
* If FreeRTOS is running, then decrease the frequency of the periodic ISR because
* mesh service is performed by FreeRTOS task, and the only other thing we need to
* do periodically is the watchdog feed.
*/
else if (g_periodic_isr_time_value_us != LPC_SYS_TIME_1000US) {
g_periodic_isr_time_value_us = 1000 * LPC_SYS_TIME_1000US;
}
}
else
{
// Unexpected interrupt, so stay here to trigger watchdog interrupt
puts("Unexpected ISR call at lpc_sys.c");
while (1) {
;
}
}
}
