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alif/modmachine: Implement timeout_ms argument to deepsleep.

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This allows `machine.deepsleep(N)` to wake the device after the timout N
seconds.

Could probably also do the same thing for lightsleep.

Note that this uses the LPTIMER0 resource, which would not work if
`MICROPY_HW_SYSTEM_TICK_USE_LPTIMER` was ever enabled (it's currently never
enabled, so OK for now).

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2026-02-05 01:34:09 +11:00
parent 4191cec1eb
commit 1a01f76482
3 changed files with 43 additions and 4 deletions
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4
ports/alif/boards/ALIF_ENSEMBLE/board.c
View File

@@ -81,8 +81,8 @@ void board_early_init(void) {
.vtor_address = SCB->VTOR,
.vtor_address_ns = SCB->VTOR,
// Configure wake-up sources.
.ewic_cfg = EWIC_VBAT_GPIO | EWIC_RTC_A,
.wakeup_events = WE_LPGPIO7 | WE_LPGPIO6 | WE_LPGPIO5 | WE_LPGPIO4 | WE_LPRTC,
.ewic_cfg = EWIC_VBAT_GPIO | EWIC_VBAT_TIMER | EWIC_RTC_A,
.wakeup_events = WE_LPGPIO7 | WE_LPGPIO6 | WE_LPGPIO5 | WE_LPGPIO4 | WE_LPTIMER0 | WE_LPRTC,
};
if (se_services_set_off_profile(&off_profile)) {

4
ports/alif/boards/OPENMV_AE3/board.c
View File

@@ -154,8 +154,8 @@ void board_early_init(void) {
.vtor_address = SCB->VTOR,
.vtor_address_ns = SCB->VTOR,
// Configure wake-up sources.
.ewic_cfg = EWIC_VBAT_GPIO | EWIC_RTC_A,
.wakeup_events = WE_LPGPIO7 | WE_LPGPIO6 | WE_LPGPIO5 | WE_LPGPIO4 | WE_LPRTC,
.ewic_cfg = EWIC_VBAT_GPIO | EWIC_VBAT_TIMER | EWIC_RTC_A,
.wakeup_events = WE_LPGPIO7 | WE_LPGPIO6 | WE_LPGPIO5 | WE_LPGPIO4 | WE_LPTIMER0 | WE_LPRTC,
};
if (se_services_set_off_profile(&off_profile)) {

39
ports/alif/modmachine.c
View File

@@ -27,6 +27,7 @@
// This file is never compiled standalone, it's included directly from
// extmod/modmachine.c via MICROPY_PY_MACHINE_INCLUDEFILE.
#include "modmachine.h"
#include "se_services.h"
#include "tusb.h"
@@ -116,7 +117,37 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
#endif
}
#include "lptimer.h"
#include "sys_ctrl_lptimer.h"
#define LPTIMER ((LPTIMER_Type *)LPTIMER_BASE)
#define LPTIMER_CH_A (0)
static void lptimer_set_wakeup(uint64_t timeout_us) {
lptimer_disable_counter(LPTIMER, LPTIMER_CH_A);
ANA_REG->MISC_CTRL |= 1 << 0; // SEL_32K, select LXFO
select_lptimer_clk(LPTIMER_CLK_SOURCE_32K, LPTIMER_CH_A);
// Maximum 131 second timeout, to not overflow 32-bit ticks when
// LPTIMER is clocked at 32768Hz.
uint32_t timeout_ticks = (uint64_t)MIN(timeout_us, 131000000) * 32768 / 1000000;
// Set up the LPTIMER interrupt to fire after the given timeout.
lptimer_set_mode_userdefined(LPTIMER, LPTIMER_CH_A);
lptimer_load_count(LPTIMER, LPTIMER_CH_A, &timeout_ticks);
lptimer_clear_interrupt(LPTIMER, LPTIMER_CH_A);
lptimer_unmask_interrupt(LPTIMER, LPTIMER_CH_A);
lptimer_enable_counter(LPTIMER, LPTIMER_CH_A);
}
MP_NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args) {
mp_int_t sleep_ms = -1;
if (n_args != 0) {
sleep_ms = mp_obj_get_int(args[0]);
}
#if MICROPY_HW_ENABLE_USBDEV
mp_machine_enable_usb(false);
#endif
@@ -127,6 +158,14 @@ MP_NORETURN static void mp_machine_deepsleep(size_t n_args, const mp_obj_t *args
__disable_irq();
if (sleep_ms >= 0) {
if (sleep_ms < 10000) {
lptimer_set_wakeup(sleep_ms * 1000);
} else {
machine_rtc_set_wakeup(sleep_ms / 1000);
}
}
// If power is removed from the subsystem, the function does
// not return, and the CPU will reboot when/if the subsystem
// is next powered up.