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timer: ostimer: wait for match write ready

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Before writing to MATCH_L/MATCH_H registers, wait for permission to do
so by pollinmg MATCH_WR_RDY bit in CTRL register.
This commit is contained in:
Felipe Balbi 2025-05-20 08:49:34 -07:00 committed by Felipe Balbi
parent 7134e1a3a5
commit 7a600fe925
1 changed files with 6 additions and 1 deletions
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7
embassy-imxrt/src/time_driver.rs
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@ -336,6 +336,10 @@ impl OsTimer {
let alarm = self.alarms.borrow(cs);
alarm.timestamp.set(timestamp);
// Wait until we're allowed to write to MATCH_L/MATCH_H
// registers
while os().osevent_ctrl().read().match_wr_rdy().bit_is_set() {}
let t = self.now();
if timestamp <= t {
os().osevent_ctrl().modify(|_, w| w.ostimer_intena().clear_bit());
@ -366,7 +370,8 @@ impl OsTimer {
fn on_interrupt(&self) {
critical_section::with(|cs| {
if os().osevent_ctrl().read().ostimer_intrflag().bit_is_set() {
os().osevent_ctrl().modify(|_, w| w.ostimer_intena().clear_bit());
os().osevent_ctrl()
.modify(|_, w| w.ostimer_intena().clear_bit().ostimer_intrflag().set_bit());
self.trigger_alarm(cs);
}
});