diff options
Diffstat (limited to 'watch-library/watch/watch_extint.h')
-rw-r--r-- | watch-library/watch/watch_extint.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/watch-library/watch/watch_extint.h b/watch-library/watch/watch_extint.h index 758fe8bc..cba6c5e1 100644 --- a/watch-library/watch/watch_extint.h +++ b/watch-library/watch/watch_extint.h @@ -62,16 +62,17 @@ void watch_disable_external_interrupts(); * want to detect both rising and falling conditions (i.e. button down and button up), use * INTERRUPT_TRIGGER_BOTH and use watch_get_pin_level to check the pin level in your callback * to determine which condition caused the interrupt. - * @param pin One of pins BTN_LIGHT, BTN_MODE, BTN_ALARM, or A0-A4. If the pin parameter matches one of + * @param pin One of BTN_LIGHT, BTN_MODE, BTN_ALARM, A0, A1, A3 or A4. If the pin parameter matches one of * the three button pins, this function will also enable an internal pull-down resistor. If * the pin parameter is A0-A4, you are responsible for setting any required pull configuration * using watch_enable_pull_up or watch_enable_pull_down. * @param callback The function you wish to have called when the button is pressed. * @param trigger The condition on which you wish to trigger: rising, falling or both. - * @note The alarm button and pin A2 share an external interrupt channel EXTINT[2]; you can only use one - * or the other. However! These pins both have an alternate method of triggering via the RTC tamper - * interrupt, which has the added benefit of not requiring the external interrupt controller at all. - * @see watch_register_extwake_callback + * @note Pins A2 and A4 can also generate interrupts via the watch_register_extwake_callback function, which + * will allow them to trigger even when the watch is in deep sleep mode. + * @warning As of now, A2 is not usable via the watch_register_interrupt_callback function. To enable an + * external interrupt on pin A2, use the watch_register_extwake_callback function. This issue will be + * addressed in a future revision of the watch library. */ void watch_register_interrupt_callback(const uint8_t pin, ext_irq_cb_t callback, watch_interrupt_trigger trigger); |