diff options
Diffstat (limited to 'driver/baro_bmp280.c')
| -rw-r--r-- | driver/baro_bmp280.c | 97 |
1 files changed, 48 insertions, 49 deletions
diff --git a/driver/baro_bmp280.c b/driver/baro_bmp280.c index 037a77d963..0175dc7e4a 100644 --- a/driver/baro_bmp280.c +++ b/driver/baro_bmp280.c @@ -1,4 +1,4 @@ -/* Copyright 2016 The Chromium OS Authors. All rights reserved. +/* Copyright 2016 The ChromiumOS Authors * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ @@ -63,10 +63,12 @@ #include "i2c.h" #include "timer.h" -#define CPRINTF(format, args...) cprintf(CC_ACCEL, format, ## args) -#define CPRINTS(format, args...) cprints(CC_ACCEL, format, ## args) +#define CPRINTF(format, args...) cprintf(CC_ACCEL, format, ##args) +#define CPRINTS(format, args...) cprints(CC_ACCEL, format, ##args) -static const uint16_t standby_durn[] = {1, 63, 125, 250, 500, 1000, 2000, 4000}; +static const uint16_t standby_durn[] = { + 1, 63, 125, 250, 500, 1000, 2000, 4000 +}; /* * This function is used to get calibration parameters used for @@ -95,19 +97,19 @@ static int bmp280_get_calib_param(const struct motion_sensor_t *s) { int ret; - uint8_t a_data_u8[BMP280_CALIB_DATA_SIZE] = {0}; + uint8_t a_data_u8[BMP280_CALIB_DATA_SIZE] = { 0 }; struct bmp280_drv_data_t *data = BMP280_GET_DATA(s); ret = i2c_read_block(s->port, s->i2c_spi_addr_flags, - BMP280_TEMPERATURE_CALIB_DIG_T1_LSB_REG, - a_data_u8, BMP280_CALIB_DATA_SIZE); + BMP280_TEMPERATURE_CALIB_DIG_T1_LSB_REG, a_data_u8, + BMP280_CALIB_DATA_SIZE); if (ret) return ret; /* read calibration values*/ data->calib_param.dig_T1 = (a_data_u8[1] << 8) | a_data_u8[0]; - data->calib_param.dig_T2 = (a_data_u8[3] << 8 | a_data_u8[2]); + data->calib_param.dig_T2 = (a_data_u8[3] << 8 | a_data_u8[2]); data->calib_param.dig_T3 = (a_data_u8[5] << 8) | a_data_u8[4]; data->calib_param.dig_P1 = (a_data_u8[7] << 8) | a_data_u8[6]; @@ -124,21 +126,20 @@ static int bmp280_get_calib_param(const struct motion_sensor_t *s) } static int bmp280_read_uncomp_pressure(const struct motion_sensor_t *s, - int *uncomp_pres) + int *uncomp_pres) { int ret; - uint8_t a_data_u8[BMP280_PRESSURE_DATA_SIZE] = {0}; + uint8_t a_data_u8[BMP280_PRESSURE_DATA_SIZE] = { 0 }; ret = i2c_read_block(s->port, s->i2c_spi_addr_flags, - BMP280_PRESSURE_MSB_REG, - a_data_u8, BMP280_PRESSURE_DATA_SIZE); + BMP280_PRESSURE_MSB_REG, a_data_u8, + BMP280_PRESSURE_DATA_SIZE); if (ret) return ret; - *uncomp_pres = (int32_t)((a_data_u8[0] << 12) | - (a_data_u8[1] << 4) | - (a_data_u8[2] >> 4)); + *uncomp_pres = (int32_t)((a_data_u8[0] << 12) | (a_data_u8[1] << 4) | + (a_data_u8[2] >> 4)); return EC_SUCCESS; } @@ -153,34 +154,33 @@ static int bmp280_read_uncomp_pressure(const struct motion_sensor_t *s, * */ static int bmp280_compensate_pressure(const struct motion_sensor_t *s, - int uncomp_pressure) + int uncomp_pressure) { int var1, var2; uint32_t p; struct bmp280_drv_data_t *data = BMP280_GET_DATA(s); /* calculate x1 */ - var1 = (((int32_t)data->calib_param.t_fine) - >> 1) - 64000; + var1 = (((int32_t)data->calib_param.t_fine) >> 1) - 64000; /* calculate x2 */ - var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) - * ((int32_t)data->calib_param.dig_P6); + var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) * + ((int32_t)data->calib_param.dig_P6); var2 = var2 + ((var1 * ((int32_t)data->calib_param.dig_P5)) << 1); var2 = (var2 >> 2) + (((int32_t)data->calib_param.dig_P4) << 16); /* calculate x1 */ var1 = (((data->calib_param.dig_P3 * - (((var1 >> 2) * (var1 >> 2)) >> 13)) >> 3) + - ((((int32_t)data->calib_param.dig_P2) * var1) >> 1)) >> 18; - var1 = ((((32768 + var1)) * - ((int32_t)data->calib_param.dig_P1)) >> 15); + (((var1 >> 2) * (var1 >> 2)) >> 13)) >> + 3) + + ((((int32_t)data->calib_param.dig_P2) * var1) >> 1)) >> + 18; + var1 = ((((32768 + var1)) * ((int32_t)data->calib_param.dig_P1)) >> 15); /* Avoid exception caused by division by zero */ if (!var1) return 0; /* calculate pressure */ - p = (((uint32_t)((1048576) - uncomp_pressure) - - (var2 >> 12))) * 3125; + p = (((uint32_t)((1048576) - uncomp_pressure) - (var2 >> 12))) * 3125; /* check overflow */ if (p < 0x80000000) @@ -190,13 +190,14 @@ static int bmp280_compensate_pressure(const struct motion_sensor_t *s, /* calculate x1 */ var1 = (((int32_t)data->calib_param.dig_P9) * - ((int32_t)(((p >> 3) * (p >> 3)) >> 13))) >> 12; + ((int32_t)(((p >> 3) * (p >> 3)) >> 13))) >> + 12; /* calculate x2 */ - var2 = (((int32_t)(p >> 2)) * - ((int32_t)data->calib_param.dig_P8)) >> 13; + var2 = (((int32_t)(p >> 2)) * ((int32_t)data->calib_param.dig_P8)) >> + 13; /* calculate true pressure */ - return (uint32_t)((int32_t)p + ((var1 + var2 + - data->calib_param.dig_P7) >> 4)); + return (uint32_t)((int32_t)p + + ((var1 + var2 + data->calib_param.dig_P7) >> 4)); } /* @@ -214,38 +215,36 @@ static int bmp280_compensate_pressure(const struct motion_sensor_t *s, * 0x07 | 4000_MS */ static int bmp280_set_standby_durn(const struct motion_sensor_t *s, - uint8_t durn) + uint8_t durn) { int ret, val; - ret = i2c_read8(s->port, s->i2c_spi_addr_flags, - BMP280_CONFIG_REG, &val); + ret = i2c_read8(s->port, s->i2c_spi_addr_flags, BMP280_CONFIG_REG, + &val); if (ret == EC_SUCCESS) { val = (val & 0xE0) | ((durn << 5) & 0xE0); /* write the standby duration*/ ret = i2c_write8(s->port, s->i2c_spi_addr_flags, - BMP280_CONFIG_REG, val); + BMP280_CONFIG_REG, val); } return ret; } static int bmp280_set_power_mode(const struct motion_sensor_t *s, - uint8_t power_mode) + uint8_t power_mode) { int val; - val = (BMP280_OVERSAMP_TEMP << 5) + - (BMP280_OVERSAMP_PRES << 2) + power_mode; + val = (BMP280_OVERSAMP_TEMP << 5) + (BMP280_OVERSAMP_PRES << 2) + + power_mode; - return i2c_write8(s->port, s->i2c_spi_addr_flags, - BMP280_CTRL_MEAS_REG, val); + return i2c_write8(s->port, s->i2c_spi_addr_flags, BMP280_CTRL_MEAS_REG, + val); } -static int bmp280_set_range(struct motion_sensor_t *s, - int range, - int rnd) +static int bmp280_set_range(struct motion_sensor_t *s, int range, int rnd) { struct bmp280_drv_data_t *data = BMP280_GET_DATA(s); /* @@ -272,8 +271,8 @@ static int bmp280_init(struct motion_sensor_t *s) return EC_ERROR_INVAL; /* Read chip id */ - ret = i2c_read8(s->port, s->i2c_spi_addr_flags, - BMP280_CHIP_ID_REG, &val); + ret = i2c_read8(s->port, s->i2c_spi_addr_flags, BMP280_CHIP_ID_REG, + &val); if (ret) return ret; @@ -314,7 +313,7 @@ static int bmp280_read(const struct motion_sensor_t *s, intv3_t v) * Calculate the delay (in ms) to apply. */ static int bmp280_set_data_rate(const struct motion_sensor_t *s, int rate, - int roundup) + int roundup) { struct bmp280_drv_data_t *data = BMP280_GET_DATA(s); int durn, i, ret; @@ -335,12 +334,12 @@ static int bmp280_set_data_rate(const struct motion_sensor_t *s, int rate, } durn = 0; - for (i = BMP280_STANDBY_CNT-1; i > 0; i--) { + for (i = BMP280_STANDBY_CNT - 1; i > 0; i--) { if (period >= standby_durn[i] + BMP280_COMPUTE_TIME) { durn = i; break; - } else if (period > standby_durn[i-1] + BMP280_COMPUTE_TIME) { - durn = roundup ? i-1 : i; + } else if (period > standby_durn[i - 1] + BMP280_COMPUTE_TIME) { + durn = roundup ? i - 1 : i; break; } } |