1 files changed, 29 insertions, 0 deletions
diff --git a/watch-library/shared/driver/lis2dw.c b/watch-library/shared/driver/lis2dw.c
index fce266b3..4d60fcff 100644
--- a/watch-library/shared/driver/lis2dw.c
+++ b/watch-library/shared/driver/lis2dw.c
@@ -164,3 +164,32 @@ void lis2dw_clear_fifo(void) {
     watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_FIFO_CTRL, LIS2DW_FIFO_CTRL_MODE_OFF);
     watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_FIFO_CTRL, LIS2DW_FIFO_CTRL_MODE_COLLECT_AND_STOP | LIS2DW_FIFO_CTRL_FTH);
 }
+
+void lis2dw_configure_wakeup_int1(uint8_t threshold, bool latch, bool active_state) {
+    uint8_t configuration;
+
+    // enable wakeup interrupt on INT1 pin
+    configuration = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL4_INT1);
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL4_INT1, configuration | LIS2DW_CTRL4_INT1_WU);
+
+    // set threshold
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_WAKE_UP_THS, threshold | LIS2DW_WAKE_UP_THS_VAL_SLEEP_ON);
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_INT1_DUR, 0b01111111);
+
+    configuration = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL3) & ~(LIS2DW_CTRL3_VAL_LIR);
+    if (!active_state) configuration |= LIS2DW_CTRL3_VAL_H_L_ACTIVE;
+    if (latch) configuration |= LIS2DW_CTRL3_VAL_LIR;
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL3, configuration);
+
+    // enable interrupts
+    configuration = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7);
+    watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL7, configuration | LIS2DW_CTRL7_VAL_INTERRUPTS_ENABLE);
+}
+
+lis2dw_wakeup_source lis2dw_get_wakeup_source() {
+    return (lis2dw_wakeup_source) watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_WAKE_UP_SRC);
+}
+
+lis2dw_interrupt_source lis2dw_get_interrupt_source(void) {
+    return (lis2dw_interrupt_source) watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_ALL_INT_SRC);
+}