From 9c0330f2474c21608e805fc7e7d0cc4a94e62bf6 Mon Sep 17 00:00:00 2001 From: joeycastillo Date: Wed, 9 Oct 2024 01:34:44 -0400 Subject: [PATCH] more accelerometer experimentation --- watch-faces/demo/accel_interrupt_count_face.c | 21 ++++++++++++------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/watch-faces/demo/accel_interrupt_count_face.c b/watch-faces/demo/accel_interrupt_count_face.c index 5f8d145..9628418 100644 --- a/watch-faces/demo/accel_interrupt_count_face.c +++ b/watch-faces/demo/accel_interrupt_count_face.c @@ -68,13 +68,15 @@ void accel_interrupt_count_face_setup(uint8_t watch_face_index, void ** context_ ptr_to_count = &((accel_interrupt_count_state_t *)*context_ptr)->count; watch_enable_i2c(); lis2dw_begin(); - lis2dw_set_low_power_mode(LIS2DW_LP_MODE_2); // lowest power 14-bit mode, 25 Hz is 3.5 µA @ 1.8V w/ low noise, 3µA without - lis2dw_set_low_noise_mode(true); // consumes a little more power - lis2dw_set_range(LIS2DW_CTRL6_VAL_RANGE_4G); - lis2dw_set_data_rate(LIS2DW_DATA_RATE_25_HZ); // is this enough? - - // threshold is 1/64th of full scale, so for a FS of ±4G this is 1.25G - ((accel_interrupt_count_state_t *)*context_ptr)->threshold = 10; + lis2dw_set_mode(LIS2DW_MODE_LOW_POWER); + lis2dw_set_low_power_mode(LIS2DW_LP_MODE_1); // lowest power mode + lis2dw_set_low_noise_mode(true); // only marginally raises power consumption + lis2dw_enable_sleep(); // sleep at 1.6Hz, wake to 12.5Hz? + lis2dw_set_range(LIS2DW_CTRL6_VAL_RANGE_2G); // data sheet recommends 2G range + lis2dw_set_data_rate(LIS2DW_DATA_RATE_LOWEST); // 1.6Hz in low power mode + + // threshold is 1/64th of full scale, so for a FS of ±2G this is 1.5G + ((accel_interrupt_count_state_t *)*context_ptr)->threshold = 24; _accel_interrupt_count_face_configure_threshold(((accel_interrupt_count_state_t *)*context_ptr)->threshold); } } @@ -87,6 +89,9 @@ void accel_interrupt_count_face_activate(void *context) { // force LE interval to never sleep movement_set_low_energy_timeout(0); + + state->running = true; + watch_register_interrupt_callback(HAL_GPIO_A4_pin(), accel_interrupt_handler, INTERRUPT_TRIGGER_RISING); } bool accel_interrupt_count_face_loop(movement_event_t event, void *context) { @@ -102,7 +107,7 @@ bool accel_interrupt_count_face_loop(movement_event_t event, void *context) { char buf[11]; watch_display_text(WATCH_POSITION_TOP_RIGHT, " "); watch_display_text_with_fallback(WATCH_POSITION_TOP, "W_THS", "TH"); - watch_display_float_with_best_effort(state->new_threshold * 0.125, " G"); + watch_display_float_with_best_effort(state->new_threshold * 0.0625, " G"); printf("%s\n", buf); } break;