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external interrupt refactor: allow enabling in watch library functions

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This commit is contained in:
Joey Castillo
2021-08-25 12:15:58 -06:00
parent c35e8e2b07
commit d09d3c3c95
8 changed files with 234 additions and 129 deletions
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16
watch-library/watch/watch_deepsleep.h
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@@ -28,16 +28,24 @@
* deepest sleep mode available on the SAM L22
*/
/// @{
/** @brief Registers a callback on one of the RTC's external wake pins, which can wake the device
* from deep sleep mode.
* @param pin Either pin A2 or pin D1, the two external wake pins on the nine-pin connector.
* from deep sleep (aka BACKUP) mode.
* @param pin Either pin BTN_ALARM, A2, or A4. These are the three external wake pins. If the pin
* is BTN_ALARM, this function also enables an internal pull down on that pin.
* @param callback The callback to be called if this pin triggers outside of deep sleep mode.
* @param level The level you wish to scan for: true for rising, false for falling. Note that you
* cannot scan for both rising and falling edges like you can with the external interrupt
* pins; with the external wake interrupt, you can only get one or the other.
* @note When in normal or STANDBY mode, this will function much like a standard external interrupt
* situation: these pins will wake from standby, and your callback will be called. However,
* if the device enters deep sleep and one of these pins wakes the device, your callback
* WILL NOT be called.
* WILL NOT be called, as the device is basically waking from reset at that point.
* @warning As of the current SAM L22 silicon revision (rev B), the BTN_ALARM pin cannot wake the
* device from BACKUP mode. You can still use this function to register a BTN_ALARM interrupt
* in normal or STANDBY mode, but to wake from BACKUP, you will need to use pin A2 or A4.
*/
void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback);
void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool level);
/** @brief Stores data in one of the RTC's backup registers, which retain their data in deep sleep.
* @param data An unsigned 32 bit integer with the data you wish to store.