Kenji Arai
BMP180 is a digital barometric pressure sensor made by Bosch Sensortec (I2C Interface)
Dependents: LPC1114_data_logger ProjectIOT Wether_Meter LPC1114_barometer_with_data_logging
Diff: BMP180.cpp
- Revision:
- 4:37fed112956c
- Parent:
- 2:b81e7659be7a
--- a/BMP180.cpp Sun Jun 29 06:51:05 2014 +0000
+++ b/BMP180.cpp Wed Aug 23 09:23:32 2017 +0000
@@ -2,18 +2,12 @@
* mbed library program
* Control BMP180(Bosch) Pressure Sensor
*
- * Copyright (c) 2014 Kenji Arai / JH1PJL
+ * Copyright (c) 2013,'14,'17 Kenji Arai / JH1PJL
* http://www.page.sannet.ne.jp/kenjia/index.html
* http://mbed.org/users/kenjiArai/
- * Created: August 14th, 2013 for STM32L152
- * Changed: May 21st, 2014 mbed LPC1114
- * Revised: June 22nd, 2014
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
- * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * Created: August 14th, 2013 for STM32L152
+ * Changed: May 21st, 2014 mbed LPC1114
+ * Revised: August 23rd, 2017
*/
/*
*---------------- REFERENCE ----------------------------------------------------------------------
@@ -60,11 +54,15 @@
#define B_PRES_MEASURE_OSS3 0xf4 // pressure /over sampling #3
#define B_RESET_CMD 0xb6 // Reset chip command
-BMP180::BMP180 (PinName p_sda, PinName p_scl) : i2c(p_sda, p_scl) {
+BMP180::BMP180 (PinName p_sda, PinName p_scl)
+ : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p)
+{
init();
}
-BMP180::BMP180 (I2C& p_i2c) : i2c(p_i2c) {
+BMP180::BMP180 (I2C& p_i2c)
+ : _i2c(p_i2c)
+{
init();
}
@@ -95,7 +93,7 @@
// start temprerature measurment
baro_dt[0] = BARO_CTRL_MEAS_REG;
baro_dt[1] = B_TEMP_MEASURE;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 2);
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 2);
wait(0.3); // wait for convertion
#if 0
printf("type:0x%x\r\nac1:0x%x,ac2:0x%x,ac3:0x%x,ac4:0x%x,ac5:0x%x,ac6:0x%x\n\r",
@@ -104,8 +102,8 @@
#endif
// read temp.
baro_dt[0] = BARO_ADC_OUT_MSB_REG;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
- i2c_read_n_bytes(BMP180_addr,baro_dt,2); // not 3 but 2 (June 14th/Debug)
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2); // not 3 but 2 (June 14th/Debug)
raw_temp = baro_dt[0] << 8 | baro_dt[1];
#if 0
printf("temp_raw:0x%x\n\r",raw_temp);
@@ -113,12 +111,12 @@
// start pressure measurement
baro_dt[0] = BARO_CTRL_MEAS_REG;
baro_dt[1] = B_PRES_MEASURE_OSS3;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 2);
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 2);
wait(0.3); // wait for convertion
// read pressure
baro_dt[0] = BARO_ADC_OUT_MSB_REG;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
- i2c_read_n_bytes(BMP180_addr,baro_dt,3);
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,3);
raw_pres = ( baro_dt[0] << 16 | baro_dt[1] << 8 | baro_dt[2] ) >> (8 - 3 );
#if 0
printf("pres_raw:0x%x\n\r",raw_pres);
@@ -130,7 +128,7 @@
dt_x2 = ( (int32_t)eep_mc << 11 ) / ( dt_x1 + (int32_t)eep_md );
dt_b5 = dt_x1 + dt_x2;
}
- temperature = (float)( ( dt_b5 + 8 ) >> 4 )/10.0; // temperature in 0.1 degC
+ temperature = (float)( ( dt_b5 + 8 ) >> 4 )/10.0f; // temperature in 0.1 degC
// Pressure
dt_b6 = dt_b5 - 4000;
dt_x1 = ( dt_b6 * dt_b6 ) >> 12;
@@ -158,49 +156,50 @@
dt_x2 *= -1;
// pressure in Pa
dx += ( dt_x1 + dt_x2 + CONST_MI ) >> 4;
- pressure = (float)dx / 100.0;
+ pressure = (float)dx / 100.0f;
}
void BMP180::init () {
BMP180_addr = BMP180ADDR;
// parameters AC1-AC6
baro_dt[0] = BARO_PROM_ADDR;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac1 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac2 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac3 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac4 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac5 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_ac6 = (baro_dt[0] << 8) | baro_dt[1];
// parameters B1,B2
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_b1 = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_b2 = (baro_dt[0] << 8) | baro_dt[1];
// parameters MB,MC,MD
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_mb = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_mc = (baro_dt[0] << 8) | baro_dt[1];
- i2c_read_n_bytes(BMP180_addr,baro_dt,2);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,2);
eep_md = (baro_dt[0] << 8) | baro_dt[1];
// Read ID
baro_dt[0] = BARO_CHIP_ID_REG;
- i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
- i2c_read_n_bytes(BMP180_addr,baro_dt,1);
+ _i2c_write_n_bytes(BMP180_addr, baro_dt, 1);
+ _i2c_read_n_bytes(BMP180_addr,baro_dt,1);
id_number = baro_dt[0];
}
-void BMP180::i2c_read_n_bytes (int addr, char* dt, int n) {
- i2c.read(addr, dt, n);
+void BMP180::_i2c_read_n_bytes (int addr, char* dt, int n) {
+ _i2c.read(addr, dt, n);
}
-void BMP180::i2c_write_n_bytes (int addr, char* dt, int n) {
- i2c.write(addr, dt, n);
+void BMP180::_i2c_write_n_bytes (int addr, char* dt, int n) {
+ _i2c.write(addr, dt, n);
}
+