#define MPL3115_NUM_CONV_VALS 5
+/* ------------ BMP085 defines ------------ */
+/* I2C address of the BMP085 sensor */
+#define BMP085_I2C_ADDRESS 0x77
+
+/* register addresses */
+#define BMP085_ADDR_ID_REG 0xD0
+#define BMP085_ADDR_VERSION 0xD1
+
+#define BMP085_ADDR_CONV 0xF6
+
+#define BMP085_ADDR_CTRL_REG 0xF4
+#define BMP085_ADDR_COEFFS 0xAA
+
+/* register sizes */
+#define BMP085_NUM_COEFFS 22
+
+/* commands, values */
+#define BMP085_CHIP_ID 0x55
+
+#define BMP085_CMD_CONVERT_TEMP 0x2E
+
+#define BMP085_CMD_CONVERT_PRESS_0 0x34
+#define BMP085_CMD_CONVERT_PRESS_1 0x74
+#define BMP085_CMD_CONVERT_PRESS_2 0xB4
+#define BMP085_CMD_CONVERT_PRESS_3 0xF4
+
+/* in us */
+#define BMP085_TIME_CNV_TEMP 4500
+
+#define BMP085_TIME_CNV_PRESS_0 4500
+#define BMP085_TIME_CNV_PRESS_1 7500
+#define BMP085_TIME_CNV_PRESS_2 13500
+#define BMP085_TIME_CNV_PRESS_3 25500
+
+
/* ------------ Normalization ------------ */
/* Mean sea level pressure normalization methods */
#define MSLP_NONE 0
/** Temperature reference history depth for averaging. See #get_reference_temperature */
#define REF_TEMP_AVG_NUM 5
+
/* ------------------------------------------ */
+
+/** Supported sensor types */
+enum Sensor_type {
+ Sensor_none = 0,
+ Sensor_MPL115,
+ Sensor_MPL3115,
+ Sensor_BMP085
+};
+
static const char *config_keys[] =
{
"Device",
static _Bool configured = 0; /**< the whole plugin config status */
static int i2c_bus_fd = -1; /**< I2C bus device FD */
-
-static _Bool is_MPL3115 = 0; /**< is this MPL3115? */
-static __s32 oversample_MPL3115 = 0; /**< MPL3115 CTRL1 oversample setting */
+
+static enum Sensor_type sensor_type = Sensor_none; /**< detected/used sensor type */
+
+static __s32 mpl3115_oversample = 0; /**< MPL3115 CTRL1 oversample setting */
+
+// BMP085 configuration
+static unsigned bmp085_oversampling; /**< BMP085 oversampling (0-3) */
+static unsigned long bmp085_timeCnvPress; /**< BMP085 conversion time for pressure in us */
+static __u8 bmp085_cmdCnvPress; /**< BMP085 pressure conversion command */
/* MPL115 conversion coefficients */
static double mpl115_coeffC11;
static double mpl115_coeffC22;
+/* BMP085 conversion coefficients */
+static short bmp085_AC1;
+static short bmp085_AC2;
+static short bmp085_AC3;
+static unsigned short bmp085_AC4;
+static unsigned short bmp085_AC5;
+static unsigned short bmp085_AC6;
+static short bmp085_B1;
+static short bmp085_B2;
+static short bmp085_MB;
+static short bmp085_MC;
+static short bmp085_MD;
+
+
+
/* ------------------------ averaging ring buffer ------------------------ */
/* Used only for MPL115. MPL3115 supports real oversampling in the device so */
/* no need for any postprocessing. */
return 0;
}
+
/* ------------------------ MPL115 access ------------------------ */
/**
+ * Detect presence of a MPL115 pressure sensor.
+ *
+ * Unfortunately there seems to be no ID register so we just try to read first
+ * conversion coefficient from device at MPL115 address and hope it is really
+ * MPL115. We should use this check as the last resort (which would be the typical
+ * case anyway since MPL115 is the least accurate sensor).
+ * As a sideeffect will leave set I2C slave address.
+ *
+ * @return 1 if MPL115, 0 otherwise
+ */
+static int MPL115_detect(void)
+{
+ __s32 res;
+ char errbuf[1024];
+
+ if (ioctl(i2c_bus_fd, I2C_SLAVE_FORCE, MPL115_I2C_ADDRESS) < 0)
+ {
+ ERROR("barometer: MPL115_detect problem setting i2c slave address to 0x%02X: %s",
+ MPL115_I2C_ADDRESS,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 0 ;
+ }
+
+ res = i2c_smbus_read_byte_data(i2c_bus_fd, MPL115_ADDR_COEFFS);
+ if(res >= 0)
+ {
+ DEBUG ("barometer: MPL115_detect - positive detection");
+ return 1;
+ }
+
+ DEBUG ("barometer: MPL115_detect - negative detection");
+ return 0;
+}
+
+/**
* Read the MPL115 sensor conversion coefficients.
*
* These are (device specific) constants so we can read them just once.
mpl115_coeffs);
if (res < 0)
{
- ERROR ("barometer: read_mpl115_coeffs - problem reading data: %s",
+ ERROR ("barometer: MPL115_read_coeffs - problem reading data: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return -1;
}
mpl115_coeffC22 /= 32.0; //16-11=5
mpl115_coeffC22 /= 33554432.0; /* 10+15=25 fract */
- DEBUG("barometer: read_mpl115_coeffs: a0=%lf, b1=%lf, b2=%lf, c12=%lf, c11=%lf, c22=%lf",
+ DEBUG("barometer: MPL115_read_coeffs: a0=%lf, b1=%lf, b2=%lf, c12=%lf, c11=%lf, c22=%lf",
mpl115_coeffA0,
mpl115_coeffB1,
mpl115_coeffB2,
}
-/*
+/**
* Convert raw adc values to real data using the sensor coefficients.
*
* @param adc_pressure adc pressure value to be converted
*pressure = ((1150.0-500.0) * Pcomp / 1023.0) + 500.0;
*temperature = (472.0 - adc_temp) / 5.35 + 25.0;
- DEBUG ("barometer: convert_adc_to_real - got %lf hPa, %lf C",
+ DEBUG ("barometer: MPL115_convert_adc_to_real - got %lf hPa, %lf C",
*pressure,
*temperature);
}
/**
* Detect presence of a MPL3115 pressure sensor by checking register "WHO AM I"
+ *
+ * As a sideeffect will leave set I2C slave address.
*
* @return 1 if MPL3115, 0 otherwise
*/
static int MPL3115_detect(void)
{
__s32 res;
+ char errbuf[1024];
+
+ if (ioctl(i2c_bus_fd, I2C_SLAVE_FORCE, MPL3115_I2C_ADDRESS) < 0)
+ {
+ ERROR("barometer: MPL3115_detect problem setting i2c slave address to 0x%02X: %s",
+ MPL3115_I2C_ADDRESS,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 0 ;
+ }
res = i2c_smbus_read_byte_data(i2c_bus_fd, MPL3115_REG_WHO_AM_I);
if(res == MPL3115_WHO_AM_I_RESP)
if(config_oversample > 100)
{
new_val = 128;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_128;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_128;
}
else if(config_oversample > 48)
{
new_val = 64;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_64;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_64;
}
else if(config_oversample > 24)
{
new_val = 32;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_32;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_32;
}
else if(config_oversample > 12)
{
new_val = 16;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_16;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_16;
}
else if(config_oversample > 6)
{
new_val = 8;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_8;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_8;
}
else if(config_oversample > 3)
{
new_val = 4;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_4;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_4;
}
else if(config_oversample > 1)
{
new_val = 2;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_2;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_2;
}
else
{
new_val = 1;
- oversample_MPL3115 = MPL3115_CTRL_REG1_OST_1;
+ mpl3115_oversample = MPL3115_CTRL_REG1_OST_1;
}
- DEBUG("barometer: correcting oversampling for MPL3115 from %d to %d",
+ DEBUG("barometer: MPL3115_adjust_oversampling - correcting oversampling from %d to %d",
config_oversample,
new_val);
config_oversample = new_val;
tmp_value = (data[0] << 16) | (data[1] << 8) | data[2];
*pressure = ((double) tmp_value) / 4.0 / 16.0 / 100.0;
- DEBUG ("barometer: MPL3115_read, absolute pressure = %lf hPa", *pressure);
+ DEBUG ("barometer: MPL3115_read - absolute pressure = %lf hPa", *pressure);
if(data[3] > 0x7F)
{
}
*temperature += (double)(data[4]) / 256.0;
- DEBUG ("barometer: MPL3115_read, temperature = %lf C", *temperature);
+ DEBUG ("barometer: MPL3115_read - temperature = %lf C", *temperature);
return 0;
}
/* Set to barometer with an OSR */
res = i2c_smbus_write_byte_data(i2c_bus_fd,
MPL3115_REG_CTRL_REG1,
- oversample_MPL3115);
+ mpl3115_oversample);
if (res < 0)
{
ERROR ("barometer: MPL3115_init_sensor - problem configuring CTRL_REG1: %s",
return 0;
}
+/* ------------------------ BMP085 access ------------------------ */
+
+/**
+ * Detect presence of a BMP085 pressure sensor by checking its ID register
+ *
+ * As a sideeffect will leave set I2C slave address.
+ *
+ * @return 1 if BMP085, 0 otherwise
+ */
+static int BMP085_detect(void)
+{
+ __s32 res;
+ char errbuf[1024];
+
+ if (ioctl(i2c_bus_fd, I2C_SLAVE_FORCE, BMP085_I2C_ADDRESS) < 0)
+ {
+ ERROR("barometer: BMP085_detect - problem setting i2c slave address to 0x%02X: %s",
+ BMP085_I2C_ADDRESS,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 0 ;
+ }
+
+ res = i2c_smbus_read_byte_data(i2c_bus_fd, BMP085_ADDR_ID_REG);
+ if(res == BMP085_CHIP_ID)
+ {
+ DEBUG ("barometer: BMP085_detect - positive detection");
+
+ /* get version */
+ res = i2c_smbus_read_byte_data(i2c_bus_fd, BMP085_ADDR_VERSION );
+ if (res < 0)
+ {
+ ERROR("barometer: BMP085_detect - problem checking chip version: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 0 ;
+ }
+ DEBUG ("barometer: BMP085_detect - chip version ML:0x%02X AL:0x%02X",
+ res & 0x0f,
+ (res & 0xf0) >> 4);
+ return 1;
+ }
+
+ DEBUG ("barometer: BMP085_detect - negative detection");
+ return 0;
+}
+
+
+/**
+ * Adjusts oversampling settings to values supported by BMP085
+ *
+ * BMP085 supports only 1,2,4 or 8 samples.
+ */
+static void BMP085_adjust_oversampling(void)
+{
+ int new_val = 0;
+
+ if( config_oversample > 6 ) /* 8 */
+ {
+ new_val = 8;
+ bmp085_oversampling = 3;
+ bmp085_cmdCnvPress = BMP085_CMD_CONVERT_PRESS_3;
+ bmp085_timeCnvPress = BMP085_TIME_CNV_PRESS_3;
+ }
+ else if( config_oversample > 3 ) /* 4 */
+ {
+ new_val = 4;
+ bmp085_oversampling = 2;
+ bmp085_cmdCnvPress = BMP085_CMD_CONVERT_PRESS_2;
+ bmp085_timeCnvPress = BMP085_TIME_CNV_PRESS_2;
+ }
+ else if( config_oversample > 1 ) /* 2 */
+ {
+ new_val = 2;
+ bmp085_oversampling = 1;
+ bmp085_cmdCnvPress = BMP085_CMD_CONVERT_PRESS_1;
+ bmp085_timeCnvPress = BMP085_TIME_CNV_PRESS_1;
+ }
+ else /* 1 */
+ {
+ new_val = 1;
+ bmp085_oversampling = 0;
+ bmp085_cmdCnvPress = BMP085_CMD_CONVERT_PRESS_0;
+ bmp085_timeCnvPress = BMP085_TIME_CNV_PRESS_0;
+ }
+
+ DEBUG("barometer: BMP085_adjust_oversampling - correcting oversampling from %d to %d",
+ config_oversample,
+ new_val);
+ config_oversample = new_val;
+}
+
+
+/**
+ * Read the BMP085 sensor conversion coefficients.
+ *
+ * These are (device specific) constants so we can read them just once.
+ *
+ * @return Zero when successful
+ */
+static int BMP085_read_coeffs(void)
+{
+ __s32 res;
+ __u8 coeffs[BMP085_NUM_COEFFS];
+ char errbuf[1024];
+
+ res = i2c_smbus_read_i2c_block_data(i2c_bus_fd,
+ BMP085_ADDR_COEFFS,
+ BMP085_NUM_COEFFS,
+ coeffs);
+ if (res < 0)
+ {
+ ERROR ("barometer: BMP085_read_coeffs - problem reading data: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return -1;
+ }
+
+ bmp085_AC1 = ((int16_t) coeffs[0] <<8) | (int16_t) coeffs[1];
+ bmp085_AC2 = ((int16_t) coeffs[2] <<8) | (int16_t) coeffs[3];
+ bmp085_AC3 = ((int16_t) coeffs[4] <<8) | (int16_t) coeffs[5];
+ bmp085_AC4 = ((uint16_t) coeffs[6] <<8) | (uint16_t) coeffs[7];
+ bmp085_AC5 = ((uint16_t) coeffs[8] <<8) | (uint16_t) coeffs[9];
+ bmp085_AC6 = ((uint16_t) coeffs[10] <<8) | (uint16_t) coeffs[11];
+ bmp085_B1 = ((int16_t) coeffs[12] <<8) | (int16_t) coeffs[13];
+ bmp085_B2 = ((int16_t) coeffs[14] <<8) | (int16_t) coeffs[15];
+ bmp085_MB = ((int16_t) coeffs[16] <<8) | (int16_t) coeffs[17];
+ bmp085_MC = ((int16_t) coeffs[18] <<8) | (int16_t) coeffs[19];
+ bmp085_MD = ((int16_t) coeffs[20] <<8) | (int16_t) coeffs[21];
+
+ DEBUG("barometer: BMP085_read_coeffs - AC1=%d, AC2=%d, AC3=%d, AC4=%u,"\
+ " AC5=%u, AC6=%u, B1=%d, B2=%d, MB=%d, MC=%d, MD=%d",
+ bmp085_AC1,
+ bmp085_AC2,
+ bmp085_AC3,
+ bmp085_AC4,
+ bmp085_AC5,
+ bmp085_AC6,
+ bmp085_B1,
+ bmp085_B2,
+ bmp085_MB,
+ bmp085_MC,
+ bmp085_MD);
+
+ return 0;
+}
+
+
+/**
+ * Convert raw BMP085 adc values to real data using the sensor coefficients.
+ *
+ * @param adc_pressure adc pressure value to be converted
+ * @param adc_temp adc temperature value to be converted
+ * @param pressure computed real pressure
+ * @param temperature computed real temperature
+ */
+static void BMP085_convert_adc_to_real(long adc_pressure,
+ long adc_temperature,
+ double * pressure,
+ double * temperature)
+
+{
+ long X1, X2, X3;
+ long B3, B5, B6;
+ unsigned long B4, B7;
+
+ long T;
+ long P;
+
+
+ /* calculate real temperature */
+ X1 = ( (adc_temperature - bmp085_AC6) * bmp085_AC5) >> 15;
+ X2 = (bmp085_MC << 11) / (X1 + bmp085_MD);
+
+ /* B5, T */
+ B5 = X1 + X2;
+ T = (B5 + 8) >> 4;
+ *temperature = (double)T * 0.1;
+
+ /* calculate real pressure */
+ /* in general X1, X2, X3 are recycled while values of B3, B4, B5, B6 are kept */
+
+ /* B6, B3 */
+ B6 = B5 - 4000;
+ X1 = ((bmp085_B2 * ((B6 * B6)>>12)) >> 11 );
+ X2 = (((long)bmp085_AC2 * B6) >> 11);
+ X3 = X1 + X2;
+ B3 = (((((long)bmp085_AC1 * 4) + X3) << bmp085_oversampling) + 2) >> 2;
+
+ /* B4 */
+ X1 = (((long)bmp085_AC3*B6) >> 13);
+ X2 = (bmp085_B1*((B6*B6) >> 12) ) >> 16;
+ X3 = ((X1 + X2) + 2 ) >> 2;
+ B4 = ((long)bmp085_AC4* (unsigned long)(X3 + 32768)) >> 15;
+
+ /* B7, P */
+ B7 = (unsigned long)(adc_pressure - B3)*(50000>>bmp085_oversampling);
+ if( B7 < 0x80000000 )
+ {
+ P = (B7 << 1) / B4;
+ }
+ else
+ {
+ P = (B7/B4) << 1;
+ }
+ X1 = (P >> 8) * (P >> 8);
+ X1 = (X1 * 3038) >> 16;
+ X2 = ((-7357) * P) >> 16;
+ P = P + ( ( X1 + X2 + 3791 ) >> 4);
+
+ *pressure = P / 100.0; // in [hPa]
+ DEBUG ("barometer: BMP085_convert_adc_to_real - got %lf hPa, %lf C",
+ *pressure,
+ *temperature);
+}
+
+
+/**
+ * Read compensated sensor measurements
+ *
+ * @param pressure averaged measured pressure
+ * @param temperature averaged measured temperature
+ *
+ * @return Zero when successful
+ */
+static int BMP085_read(double * pressure, double * temperature)
+{
+ __s32 res;
+ __u8 measBuff[3];
+
+ long adc_pressure;
+ long adc_temperature;
+
+ char errbuf[1024];
+
+ /* start conversion of temperature */
+ res = i2c_smbus_write_byte_data( i2c_bus_fd,
+ BMP085_ADDR_CTRL_REG,
+ BMP085_CMD_CONVERT_TEMP );
+ if (res < 0)
+ {
+ ERROR ("barometer: BMP085_read - problem requesting temperature conversion: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 1;
+ }
+
+ usleep(BMP085_TIME_CNV_TEMP); /* wait for the conversion */
+
+ res = i2c_smbus_read_i2c_block_data( i2c_bus_fd,
+ BMP085_ADDR_CONV,
+ 2,
+ measBuff);
+ if (res < 0)
+ {
+ ERROR ("barometer: BMP085_read - problem reading temperature data: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 1;
+ }
+
+ adc_temperature = ( (unsigned short)measBuff[0] << 8 ) + measBuff[1];
+
+
+ /* get presure */
+ res = i2c_smbus_write_byte_data( i2c_bus_fd,
+ BMP085_ADDR_CTRL_REG,
+ bmp085_cmdCnvPress );
+ if (res < 0)
+ {
+ ERROR ("barometer: BMP085_read - problem requesting pressure conversion: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 1;
+ }
+
+ usleep(bmp085_timeCnvPress); /* wait for the conversion */
+
+ res = i2c_smbus_read_i2c_block_data( i2c_bus_fd,
+ BMP085_ADDR_CONV,
+ 3,
+ measBuff );
+ if (res < 0)
+ {
+ ERROR ("barometer: BMP085_read - problem reading pressure data: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return 1;
+ }
+
+ adc_pressure = (long)((((ulong)measBuff[0]<<16) | ((ulong)measBuff[1]<<8) | (ulong)measBuff[2] ) >> (8 - bmp085_oversampling));
+
+
+ DEBUG ("barometer: BMP085_read - raw pressure ADC value = %ld, " \
+ "raw temperature ADC value = %ld",
+ adc_pressure,
+ adc_temperature);
+
+ BMP085_convert_adc_to_real(adc_pressure, adc_temperature, pressure, temperature);
+
+ return 0;
+}
+
+
+
+/* ------------------------ Sensor detection ------------------------ */
+/**
+ * Detect presence of a supported sensor.
+ *
+ * As a sideeffect will leave set I2C slave address.
+ * The detection is done in the order BMP085, MPL3115, MPL115 and stops after
+ * first sensor beeing found.
+ *
+ * @return detected sensor type
+ */
+enum Sensor_type Detect_sensor_type(void)
+{
+ if(BMP085_detect())
+ return Sensor_BMP085;
+
+ else if(MPL3115_detect())
+ return Sensor_MPL3115;
+
+ else if(MPL115_detect())
+ return Sensor_MPL115;
+
+ return Sensor_none;
+}
/* ------------------------ Common functionality ------------------------ */
double temp = 0.0;
int result = 0;
- DEBUG ("barometer: abs_to_mean_sea_level_pressure: absPressure = %lf, method = %d",
- abs_pressure,
- config_normalize);
-
if (config_normalize >= MSLP_DEU_WETT)
{
result = get_reference_temperature(&temp);
case MSLP_INTERNATIONAL:
mean = abs_pressure / \
- pow(1.0 - 0.0065*config_altitude/288.15, 0.0065*0.0289644/(8.31447*0.0065));
+ pow(1.0 - 0.0065*config_altitude/288.15, 9.80665*0.0289644/(8.31447*0.0065));
break;
case MSLP_DEU_WETT:
break;
}
+ DEBUG ("barometer: abs_to_mean_sea_level_pressure: absPressure = %lf hPa, method = %d, meanPressure = %lf hPa",
+ abs_pressure,
+ config_normalize,
+ mean);
+
return mean;
}
if (oversampling_tmp < 1 || oversampling_tmp > 1024)
{
WARNING ("barometer: collectd_barometer_config: invalid oversampling: %d." \
- " Allowed values are 1 to 1024 (for MPL115) or 128 (for MPL3115).",
+ " Allowed values are 1 to 1024 (for MPL115) or 1 to 128 (for MPL3115) or 1 to 8 (for BMP085).",
oversampling_tmp);
return 1;
}
{
DEBUG ("barometer: collectd_barometer_shutdown");
- if(!is_MPL3115)
+ if(sensor_type == Sensor_MPL115)
{
averaging_delete (&pressure_averaging);
averaging_delete (&temperature_averaging);
/**
+ * Plugin read callback for BMP085.
+ *
+ * Dispatching will create values:
+ * - <hostname>/barometer-bmp085/pressure-normalized
+ * - <hostname>/barometer-bmp085/pressure-absolute
+ * - <hostname>/barometer-bmp085/temperature
+ *
+ * @return Zero when successful.
+ */
+static int BMP085_collectd_barometer_read (void)
+{
+ int result = 0;
+
+ double pressure = 0.0;
+ double temperature = 0.0;
+ double norm_pressure = 0.0;
+
+ value_list_t vl = VALUE_LIST_INIT;
+ value_t values[1];
+
+ DEBUG("barometer: BMP085_collectd_barometer_read");
+
+ if (!configured)
+ {
+ return -1;
+ }
+
+ result = BMP085_read(&pressure, &temperature);
+ if(result)
+ return result;
+
+ norm_pressure = abs_to_mean_sea_level_pressure(pressure);
+
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "barometer", sizeof (vl.plugin));
+ sstrncpy (vl.plugin_instance, "bmp085", sizeof (vl.plugin_instance));
+
+ vl.values_len = 1;
+ vl.values = values;
+
+ /* dispatch normalized air pressure */
+ sstrncpy (vl.type, "pressure", sizeof (vl.type));
+ sstrncpy (vl.type_instance, "normalized", sizeof (vl.type_instance));
+ values[0].gauge = norm_pressure;
+ plugin_dispatch_values (&vl);
+
+ /* dispatch absolute air pressure */
+ sstrncpy (vl.type, "pressure", sizeof (vl.type));
+ sstrncpy (vl.type_instance, "absolute", sizeof (vl.type_instance));
+ values[0].gauge = pressure;
+ plugin_dispatch_values (&vl);
+
+ /* dispatch sensor temperature */
+ sstrncpy (vl.type, "temperature", sizeof (vl.type));
+ sstrncpy (vl.type_instance, "", sizeof (vl.type_instance));
+ values[0].gauge = temperature;
+ plugin_dispatch_values (&vl);
+
+ return 0;
+}
+
+
+/**
* Initialization callback
*
* Check config, initialize I2C bus access, conversion coefficients and averaging
return -1;
}
- if (ioctl(i2c_bus_fd, I2C_SLAVE_FORCE, MPL115_I2C_ADDRESS) < 0)
- {
- ERROR("barometer: collectd_barometer_init problem setting i2c slave address to 0x%02X: %s",
- MPL115_I2C_ADDRESS,
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return -1;
- }
-
- /* detect sensor type - MPL115 or MPL3115 */
- is_MPL3115 = MPL3115_detect();
+ /* detect sensor type - this will also set slave address */
+ sensor_type = Detect_sensor_type();
/* init correct sensor type */
- if(is_MPL3115) /* MPL3115 */
+ switch(sensor_type)
+ {
+/* MPL3115 */
+ case Sensor_MPL3115:
{
MPL3115_adjust_oversampling();
-
+
if(MPL3115_init_sensor())
return -1;
-
+
plugin_register_read ("barometer", MPL3115_collectd_barometer_read);
}
- else /* MPL115 */
+ break;
+
+/* MPL115 */
+ case Sensor_MPL115:
{
if (averaging_create (&pressure_averaging, config_oversample))
{
if (MPL115_read_coeffs() < 0)
return -1;
-
+
plugin_register_read ("barometer", MPL115_collectd_barometer_read);
}
+ break;
+
+/* BMP085 */
+ case Sensor_BMP085:
+ {
+ BMP085_adjust_oversampling();
+
+ if (BMP085_read_coeffs() < 0)
+ return -1;
+
+ plugin_register_read ("barometer", BMP085_collectd_barometer_read);
+ }
+ break;
+
+/* anything else -> error */
+ default:
+ ERROR("barometer: collectd_barometer_init - no supported sensor found");
+ return -1;
+ }
+
configured = 1;
return 0;
projects / collectd.git / blobdiff