accelerometer test: stream data to UART

diff --git a/apps/accelerometer-test/app.c b/apps/accelerometer-test/app.c
index bfef132c8419ad607aead36584d030eb12839384..4dee3fe5703d4b48cfcd9452d4af459dfac8c918 100644 (file)
--- a/apps/accelerometer-test/app.c
+++ b/apps/accelerometer-test/app.c
@@ -20,17 +20,23 @@ uint8_t ticks = 0;
 char buf[13] = {0};
 
 static void cb_tick(void) {
+    watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
     if (!lis2dw_have_new_data()) return;
 
+    watch_set_indicator(WATCH_INDICATOR_SIGNAL);
     lis2dw_reading raw_reading;
     lis2dw_acceleration_measurement measurement = lis2dw_get_acceleration_measurement(&raw_reading);
-    (void)measurement;
-    printf("%d, %d, %d\n", raw_reading.x, raw_reading.y, raw_reading.z);
+    printf("%f, %f, %f\n", measurement.x, measurement.y, measurement.z);
+    char buf[128];
+    sprintf(buf, "%f, %f, %f\n", measurement.x, measurement.y, measurement.z);
+    watch_debug_puts(buf);
 }
 
 void app_init(void) {
+    watch_enable_debug_uart(9600);
+
     watch_enable_display();
-    watch_display_string("IN 0  0  0", 0);
+    watch_display_string("AC  Strean", 0);
 
     watch_enable_external_interrupts();
     watch_register_interrupt_callback(BTN_MODE, cb_mode_pressed, INTERRUPT_TRIGGER_RISING);
@@ -39,8 +45,12 @@ void app_init(void) {
 
     watch_enable_i2c();
     lis2dw_begin();
+    lis2dw_set_data_rate(LIS2DW_DATA_RATE_25_HZ); // is this enough for training?
+    lis2dw_set_low_noise_mode(true); // consumes a little more power
+    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_range(LIS2DW_CTRL6_VAL_RANGE_4G);
 
-    watch_rtc_register_periodic_callback(cb_tick, 16);
+    watch_rtc_register_periodic_callback(cb_tick, 64);
 }
 
 void app_wake_from_backup(void) {
@@ -57,7 +67,6 @@ void app_wake_from_standby(void) {
 
 bool app_loop(void) {
     // TODO: interrupt configuration for LIS2DW
-    sprintf(buf, "IN%2d%3d%3d", ticks, interrupts, last_interrupts);
     watch_display_string(buf, 0);
 
     return true;