From c5fe350fa1ab16c03f304f21ee6d534ff2f5891e Mon Sep 17 00:00:00 2001
From: David Volovskiy <devolov@gmail.com>
Date: Sun, 16 Nov 2025 10:15:46 -0500
Subject: [PATCH] Explicitly set interrupt type to latched

---
 movement.c                           |  5 +++--
 watch-library/shared/driver/lis2dw.c | 14 ++++++++++++++
 watch-library/shared/driver/lis2dw.h |  4 ++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/movement.c b/movement.c
index f90aac93..345dcb34 100644
--- a/movement.c
+++ b/movement.c
@@ -284,12 +284,12 @@ static uint32_t _movement_get_accelerometer_events() {
 
     if (int_src & LIS2DW_REG_ALL_INT_SRC_DOUBLE_TAP) {
         accelerometer_events |= 1 << EVENT_DOUBLE_TAP;
-        printf("Double tap!\n");
+        printf("Double tap!\r\n");
     }
 
     if (int_src & LIS2DW_REG_ALL_INT_SRC_SINGLE_TAP) {
         accelerometer_events |= 1 << EVENT_SINGLE_TAP;
-        printf("Single tap!\n");
+        printf("Single tap!\r\n");
     }
 
     return accelerometer_events;
@@ -1118,6 +1118,7 @@ void app_setup(void) {
             watch_register_interrupt_callback(HAL_GPIO_A3_pin(), cb_accelerometer_event, INTERRUPT_TRIGGER_RISING);
 
             // Enable the interrupts...
+            lis2dw_latched_interrupts();
             lis2dw_enable_interrupts();
 
             // At first boot, this next line sets the accelerometer's sampling rate to 0, which is LIS2DW_DATA_RATE_POWERDOWN.
diff --git a/watch-library/shared/driver/lis2dw.c b/watch-library/shared/driver/lis2dw.c
index 1c89f244..6e3cb59a 100644
--- a/watch-library/shared/driver/lis2dw.c
+++ b/watch-library/shared/driver/lis2dw.c
@@ -425,6 +425,20 @@ void lis2dw_disable_interrupts(void) {
 #endif
 }
 
+void lis2dw_pulsed_interrupts(void) {
+#ifdef I2C_SERCOM
+    uint8_t configuration = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7);
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7, configuration | LIS2DW_CTRL7_VAL_DRDY_PULSED);
+#endif
+}
+
+void lis2dw_latched_interrupts(void) {
+#ifdef I2C_SERCOM
+    uint8_t configuration = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7);
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7, configuration & ~LIS2DW_CTRL7_VAL_DRDY_PULSED);
+#endif
+}
+
 lis2dw_wakeup_source_t lis2dw_get_wakeup_source() {
 #ifdef I2C_SERCOM
     return (lis2dw_wakeup_source_t) watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_WAKE_UP_SRC);
diff --git a/watch-library/shared/driver/lis2dw.h b/watch-library/shared/driver/lis2dw.h
index 3b017c65..2db57da1 100644
--- a/watch-library/shared/driver/lis2dw.h
+++ b/watch-library/shared/driver/lis2dw.h
@@ -375,6 +375,10 @@ void lis2dw_enable_interrupts(void);
 
 void lis2dw_disable_interrupts(void);
 
+void lis2dw_pulsed_interrupts(void);
+
+void lis2dw_latched_interrupts(void);
+
 lis2dw_interrupt_source_t lis2dw_get_interrupt_source(void);
 
 lis2dw_wakeup_source_t lis2dw_get_wakeup_source(void);