diff options
Diffstat (limited to 'watch-library/shared/driver/lis2dw.c')
| -rw-r--r-- | watch-library/shared/driver/lis2dw.c | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/watch-library/shared/driver/lis2dw.c b/watch-library/shared/driver/lis2dw.c index 6e1ac56d..fce266b3 100644 --- a/watch-library/shared/driver/lis2dw.c +++ b/watch-library/shared/driver/lis2dw.c @@ -50,10 +50,10 @@ bool lis2dw_have_new_data(void) { return retval & LIS2DW_STATUS_VAL_DRDY; } -lis2dw_reading lis2dw_get_raw_reading(void) { +lis2dw_reading_t lis2dw_get_raw_reading(void) { uint8_t buffer[6]; uint8_t reg = LIS2DW_REG_OUT_X_L | 0x80; // set high bit for consecutive reads - lis2dw_reading retval; + lis2dw_reading_t retval; watch_i2c_send(LIS2DW_ADDRESS, ®, 1); watch_i2c_receive(LIS2DW_ADDRESS, (uint8_t *)&buffer, 6); @@ -68,8 +68,8 @@ lis2dw_reading lis2dw_get_raw_reading(void) { return retval; } - lis2dw_acceleration_measurement lis2dw_get_acceleration_measurement(lis2dw_reading *out_reading) { - lis2dw_reading reading = lis2dw_get_raw_reading(); + lis2dw_acceleration_measurement_t lis2dw_get_acceleration_measurement(lis2dw_reading_t *out_reading) { + lis2dw_reading_t reading = lis2dw_get_raw_reading(); uint8_t range = lis2dw_get_range(); if (out_reading != NULL) *out_reading = reading; @@ -82,7 +82,7 @@ lis2dw_reading lis2dw_get_raw_reading(void) { if (range == LIS2DW_RANGE_8_G) lsb_value = 16; if (range == LIS2DW_RANGE_16_G) lsb_value = 48; - lis2dw_acceleration_measurement retval; + lis2dw_acceleration_measurement_t retval; retval.x = lsb_value * ((float)reading.x / 64000.0); retval.y = lsb_value * ((float)reading.y / 64000.0); @@ -104,7 +104,6 @@ lis2dw_range_t lis2dw_get_range(void) { return (lis2dw_range_t)retval; } - void lis2dw_set_data_rate(lis2dw_data_rate_t dataRate) { uint8_t val = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL1) & ~(0b1111 << 4); uint8_t bits = dataRate << 4; @@ -137,3 +136,31 @@ void lis2dw_set_low_noise_mode(bool on) { bool lis2dw_get_low_noise_mode(void) { return (watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_CTRL1) & LIS2DW_CTRL6_VAL_LOW_NOISE) != 0; } + +inline void lis2dw_disable_fifo(void) { + watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_FIFO_CTRL, LIS2DW_FIFO_CTRL_MODE_OFF); +} + +inline void lis2dw_enable_fifo(void) { + watch_i2c_write8(LIS2DW_ADDRESS, LIS2DW_REG_FIFO_CTRL, LIS2DW_FIFO_CTRL_MODE_COLLECT_AND_STOP | LIS2DW_FIFO_CTRL_FTH); +} + +bool lis2dw_read_fifo(lis2dw_fifo_t *fifo_data) { + uint8_t temp = watch_i2c_read8(LIS2DW_ADDRESS, LIS2DW_REG_FIFO_SAMPLE); + bool overrun = !!(temp & LIS2DW_FIFO_SAMPLE_OVERRUN); + uint8_t buffer[6]; + + fifo_data->count = temp & LIS2DW_FIFO_SAMPLE_COUNT; + + for(int i = 0; i < fifo_data->count; i++) { + watch_i2c_receive(LIS2DW_ADDRESS, (uint8_t *)&buffer, 6); + fifo_data->readings[i] = lis2dw_get_raw_reading(); + } + + return overrun; +} + +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); +} |