lis2dw: add FIFO support

1 files changed, 9 insertions, 11 deletions

diff --git a/apps/accelerometer-test/app.c b/apps/accelerometer-test/app.c
index 1f7803c6..1a3acafa 100644
--- a/apps/accelerometer-test/app.c
+++ b/apps/accelerometer-test/app.c
@@ -24,17 +24,13 @@ static void cb_tick(void) {
     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);
-    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);
+    lis2dw_fifo_t fifo;
+    bool overrun = lis2dw_read_fifo(&fifo);
+    printf("FIFO captured %d readings.\n", fifo.count);
+    if (overrun) printf("\tThere was an overrun!\n\n");
 }
 
 void app_init(void) {
-    watch_enable_debug_uart(460800); // this is glitchy now, but this enables a baud rate of 115200 when USB is disabled.
-
     watch_enable_display();
     watch_display_string("AC  Strean", 0);
 
@@ -45,12 +41,14 @@ 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_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 for training?
+
+    lis2dw_enable_fifo();
 
-    watch_rtc_register_periodic_callback(cb_tick, 64);
+    watch_rtc_register_periodic_callback(cb_tick, 1);
 }
 
 void app_wake_from_backup(void) {