136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
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/****************************************************************************
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* drivers/sensors/bmp180_base.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* Character driver for the Freescale BMP1801 Barometer Sensor */
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <fixedmath.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/signal.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/sensors/bmp180.h>
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#include <nuttx/random.h>
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#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_BMP180)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define BMP180_ADDR 0x77
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#define BMP180_FREQ 100000
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#define DEVID 0x55
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#define BMP180_AC1_MSB 0xaa
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#define BMP180_AC1_LSB 0xab
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#define BMP180_AC2_MSB 0xac
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#define BMP180_AC2_LSB 0xad
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#define BMP180_AC3_MSB 0xae
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#define BMP180_AC3_LSB 0xaf
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#define BMP180_AC4_MSB 0xb0
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#define BMP180_AC4_LSB 0xb1
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#define BMP180_AC5_MSB 0xb2
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#define BMP180_AC5_LSB 0xb3
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#define BMP180_AC6_MSB 0xb4
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#define BMP180_AC6_LSB 0xb5
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#define BMP180_B1_MSB 0xb6
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#define BMP180_B1_LSB 0xb7
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#define BMP180_B2_MSB 0xb8
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#define BMP180_B2_LSB 0xb9
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#define BMP180_MB_MSB 0xba
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#define BMP180_MB_LSB 0xbb
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#define BMP180_MC_MSB 0xbc
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#define BMP180_MC_LSB 0xbd
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#define BMP180_MD_MSB 0xbe
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#define BMP180_MD_LSB 0xbf
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#define BMP180_DEVID 0xd0
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#define BMP180_SOFT_RESET 0xe0
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#define BMP180_CTRL_MEAS 0xf4
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#define BMP180_ADC_OUT_MSB 0xf6
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#define BMP180_ADC_OUT_LSB 0xf7
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#define BMP180_ADC_OUT_XLSB 0xf8
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#define BMP180_READ_TEMP 0x2e
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#define BMP180_READ_PRESS 0x34
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#define BMP180_NOOVERSAMPLE 0x00
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#define BMP180_OVERSAMPLE2X 0x70
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#define BMP180_OVERSAMPLE4X 0xb0
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#define BMP180_OVERSAMPLE8X 0xc0
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/* Current Oversampling */
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#define CURRENT_OSS (BMP180_OVERSAMPLE8X)
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/****************************************************************************
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* Private Type Definitions
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****************************************************************************/
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struct bmp180_dev_s
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{
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FAR struct i2c_master_s *i2c; /* I2C interface */
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uint8_t addr; /* BMP180 I2C address */
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int freq; /* BMP180 Frequency <= 3.4MHz */
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int16_t bmp180_cal_ac1; /* Calibration coefficients */
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int16_t bmp180_cal_ac2;
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int16_t bmp180_cal_ac3;
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uint16_t bmp180_cal_ac4;
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uint16_t bmp180_cal_ac5;
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uint16_t bmp180_cal_ac6;
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int16_t bmp180_cal_b1;
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int16_t bmp180_cal_b2;
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int16_t bmp180_cal_mb;
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int16_t bmp180_cal_mc;
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int16_t bmp180_cal_md;
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int32_t bmp180_utemp; /* Uncompensated temperature read from BMP180 */
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int32_t bmp180_upress; /* Uncompensated pressure read from BMP180 */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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uint8_t bmp180_getreg8(FAR struct bmp180_dev_s *priv, uint8_t regaddr);
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uint16_t bmp180_getreg16(FAR struct bmp180_dev_s *priv, uint8_t regaddr);
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void bmp180_putreg8(FAR struct bmp180_dev_s *priv, uint8_t regaddr,
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uint8_t regval);
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int bmp180_checkid(FAR struct bmp180_dev_s *priv);
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void bmp180_updatecaldata(FAR struct bmp180_dev_s *priv);
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void bmp180_read_press_temp(FAR struct bmp180_dev_s *priv);
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int bmp180_getpressure(FAR struct bmp180_dev_s *priv,
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FAR float *temperature);
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#endif /* CONFIG_I2C && CONFIG_SENSORS_BMP180 */
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