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lis2dw: add FIFO support

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This commit is contained in:
Joey Castillo
2022-02-17 16:36:21 -05:00
parent deda65b313
commit 0c59c972e7
3 changed files with 78 additions and 22 deletions
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20
apps/accelerometer-test/app.c
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@@ -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?
watch_rtc_register_periodic_callback(cb_tick, 64);
lis2dw_enable_fifo();
watch_rtc_register_periodic_callback(cb_tick, 1);
}
void app_wake_from_backup(void) {