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rp2/modmachine: Add debug code for mp_machine_lightsleep.

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Add some debug code that can be enabled to determine why lightsleep is
returning early.

Signed-off-by: Peter Harper <peter.harper@raspberrypi.com>
This commit is contained in:
Peter Harper 2025-03-18 15:32:02 +00:00 committed by Damien George
parent ee2c78cd97
commit 2a4f1c9f0f
1 changed files with 33 additions and 0 deletions
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33
ports/rp2/modmachine.c
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@ -140,6 +140,9 @@ static void mp_machine_idle(void) {
static void alarm_sleep_callback(uint alarm_id) {
}
// Set this to 1 to enable some debug of the interrupt that woke the device
#define DEBUG_LIGHTSLEEP 0
static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
mp_int_t delay_ms = 0;
bool use_timer_alarm = false;
@ -209,6 +212,14 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
// Disable ROSC.
rosc_hw->ctrl = ROSC_CTRL_ENABLE_VALUE_DISABLE << ROSC_CTRL_ENABLE_LSB;
#if DEBUG_LIGHTSLEEP
#if PICO_RP2040
uint32_t pending_intr = 0;
#else
uint32_t pending_intr[2] = { 0 };
#endif
#endif
bool alarm_armed = false;
if (n_args == 0) {
#if MICROPY_PY_NETWORK_CYW43
@ -264,6 +275,15 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
// Go into low-power mode.
if (alarm_armed) {
__wfi();
#if DEBUG_LIGHTSLEEP
#if PICO_RP2040
pending_intr = nvic_hw->ispr;
#else
pending_intr[0] = nvic_hw->ispr[0];
pending_intr[1] = nvic_hw->ispr[1];
#endif
#endif
}
clocks_hw->sleep_en0 = save_sleep_en0;
clocks_hw->sleep_en1 = save_sleep_en1;
@ -286,6 +306,19 @@ static void mp_machine_lightsleep(size_t n_args, const mp_obj_t *args) {
}
hardware_alarm_set_callback(MICROPY_HW_LIGHTSLEEP_ALARM_NUM, NULL);
hardware_alarm_unclaim(MICROPY_HW_LIGHTSLEEP_ALARM_NUM);
#if DEBUG_LIGHTSLEEP
// Check irq.h for the list of IRQ's
// for rp2040 00000042: TIMER_IRQ_1 woke the device as expected
// 00000020: USBCTRL_IRQ woke the device (probably early)
// For rp2350 00000000:00000002: TIMER0_IRQ_1 woke the device as expected
// 00000000:00004000: USBCTRL_IRQ woke the device (probably early)
#if PICO_RP2040
mp_printf(MP_PYTHON_PRINTER, "lightsleep: pending_intr=%08lx\n", pending_intr);
#else
mp_printf(MP_PYTHON_PRINTER, "lightsleep: pending_intr=%08lx:%08lx\n", pending_intr[1], pending_intr[0]);
#endif
#endif
}
}