diff --git a/ports/rp2/machine_pin.c b/ports/rp2/machine_pin.c
index 8ba0b44a684f7..a591b12aa8e29 100644
--- a/ports/rp2/machine_pin.c
+++ b/ports/rp2/machine_pin.c
@@ -134,6 +134,7 @@ void machine_pin_deinit(void) {
continue;
}
gpio_set_irq_enabled(i, GPIO_IRQ_ALL, false);
+ gpio_set_dormant_irq_enabled(i, GPIO_IRQ_ALL, false);
}
irq_remove_handler(IO_IRQ_BANK0, gpio_irq);
}
@@ -445,6 +446,7 @@ void mp_hal_pin_interrupt(mp_hal_pin_obj_t pin, mp_obj_t handler, mp_uint_t trig
// Disable all IRQs while data is updated.
gpio_set_irq_enabled(pin, GPIO_IRQ_ALL, false);
+ gpio_set_dormant_irq_enabled(pin, GPIO_IRQ_ALL, false);
// Update IRQ data.
irq->base.handler = handler;
@@ -452,9 +454,11 @@ void mp_hal_pin_interrupt(mp_hal_pin_obj_t pin, mp_obj_t handler, mp_uint_t trig
irq->flags = 0;
irq->trigger = trigger;
- // Enable IRQ if a handler is given.
- if (handler != mp_const_none && trigger != MP_HAL_PIN_TRIGGER_NONE) {
+ if (trigger != MP_HAL_PIN_TRIGGER_NONE) {
+ // Enable IRQ even if no handler is set, so pin can wake CPU from WFI/WFE
gpio_set_irq_enabled(pin, trigger, true);
+ // Also have the IRQ wake us from indefinite lightsleep
+ gpio_set_dormant_irq_enabled(pin, trigger, true);
}
}
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