WIP: accelerometer activity tracking

watch-library/hardware/watch/watch_deepsleep.c

@@ -129,6 +129,8 @@ static void _watch_disable_all_pins_except_rtc(void) {
     uint32_t config = RTC->MODE0.TAMPCTRL.reg;
     uint32_t portb_pins_to_disable = 0xFFFFFFFF;
 
+    /// FIXME: Watch library shouldn't be responsible for this, but ovement uses PB03 for orientation tracking. Keep it on.
+    portb_pins_to_disable &= 0xFFFFFFF7;
     // if there's an action set on RTC/IN[0], leave PB00 configured
     if (config & RTC_TAMPCTRL_IN0ACT_Msk) portb_pins_to_disable &= 0xFFFFFFFE;
     // same with RTC/IN[1] and PB02
@@ -150,7 +152,10 @@ static void _watch_disable_all_pins_except_rtc(void) {
 static void _watch_disable_all_peripherals_except_slcd(void) {
     _watch_disable_tcc();
     watch_disable_adc();
-    watch_disable_external_interrupts();
+    /// FIXME: I just disabled this next line since we need the EIC's event system connection to count orientation changes.
+    // The TODO item: need to power profile the impact of keeping EIC enabled, as well as the UI implications.
+    // watch_disable_external_interrupts();
+
     /// TODO: Actually disable all these peripherals! #SecondMovement
     // watch_disable_i2c();
     // SERCOM3->USART.CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE;

watch-library/shared/driver/lis2dw.c

@@ -288,3 +288,7 @@ lis2dw_wakeup_source_t lis2dw_get_wakeup_source() {
 lis2dw_interrupt_source_t lis2dw_get_interrupt_source(void) {
     return (lis2dw_interrupt_source_t) watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_ALL_INT_SRC);
 }
+
+uint8_t lis2dw_get_wakeup_threshold(void) {
+    return watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_WAKE_UP_THS) & 0b00111111;
+}

watch-library/shared/driver/lis2dw.h

@@ -375,4 +375,6 @@ lis2dw_interrupt_source_t lis2dw_get_interrupt_source(void);
 
 lis2dw_wakeup_source_t lis2dw_get_wakeup_source(void);
 
+uint8_t lis2dw_get_wakeup_threshold(void);
+
 #endif // LIS2DW_H