Diff: BME680.cpp

Revision:

1:85088a918342

Parent:

0:c70b7ececf93

--- a/BME680.cpp	Fri Jul 22 17:38:11 2016 +0000
+++ b/BME680.cpp	Wed Aug 03 15:07:42 2016 +0000
@@ -4,35 +4,139 @@
 //const double BME680::const_array1[16] = {1,1,1,1,1,0.99,1,0.992,1,1,0.998,0.995,1,0.99,1,1};
 //const double BME680::const_array2[16] = {8000000,4000000,2000000,1000000,499500.4995,248262.1648,125000,63004.03226,31281.28128,15625,7812.5,3906.25,1953.125,976.5625,488.28125,244.140625};
 
-
 const uint64_t BME680::lookup_k1_range[16] = {
-        2147483647UL, 2147483647UL, 2147483647UL, 2147483647UL, 2147483647UL,
-        2126008810UL, 2147483647UL, 2130303777UL, 2147483647UL, 2147483647UL,
-        2143188679UL, 2136746228UL, 2147483647UL, 2126008810UL, 2147483647UL,
-        2147483647UL
-                                             };
+    2147483647UL, 2147483647UL, 2147483647UL, 2147483647UL, 2147483647UL,
+    2126008810UL, 2147483647UL, 2130303777UL, 2147483647UL, 2147483647UL,
+    2143188679UL, 2136746228UL, 2147483647UL, 2126008810UL, 2147483647UL,
+    2147483647UL
+};
 
 const uint64_t BME680::lookup_k2_range[16] = {
-        4096000000UL, 2048000000UL, 1024000000UL, 512000000UL,
-        255744255UL, 127110228UL, 64000000UL, 32258064UL, 16016016UL,
-        8000000UL, 4000000UL, 2000000UL, 1000000UL, 500000UL, 250000UL,
-        125000UL
-                                             };
+    4096000000UL, 2048000000UL, 1024000000UL, 512000000UL,
+    255744255UL, 127110228UL, 64000000UL, 32258064UL, 16016016UL,
+    8000000UL, 4000000UL, 2000000UL, 1000000UL, 500000UL, 250000UL,
+    125000UL
+};
 
 const double BME680::_lookup_k1_range[BME680_GAS_RANGE_RL_LENGTH] = {
     0.0, 0.0, 0.0, 0.0, 0.0, -1.0, 0.0, -0.8,
     0.0, 0.0, -0.2, -0.5, 0.0, -1.0, 0.0, 0.0
 };
+
 const double BME680::_lookup_k2_range[BME680_GAS_RANGE_RL_LENGTH] = {
     0.0, 0.0, 0.0, 0.0, 0.1, 0.7, 0.0, -0.8,
     -0.1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
 };
 
+void BME680::setParallelMode()
+{
+    //Select oversampling for T, P, H
+    setOversamplingTemperature(2);
+    setOversamplingPressure(5);
+    setOversamplingHumidity(1);
+    
+    //Select IIR filter for pressure & temperature
+    setIIRfilterCoefficient(0);
+    
+    //Enable gas coversion
+    runGasConversion();
+    
+    //Select heater set-points to be used
+    setHeaterProfile(1);
+    
+    //Set wait time between TPHG submeasurements
+    //Set gas_wait_shared<7:0> (time base unit is 0.477ms)
+    setGasWaitShared(32, 1);
+    
+    //Define heater-on times
+    //Convert durations to register codes
+    //Set gas_wait_x<7:0> (time base unit is ms)
+    setGasWaitTime(0,25,4);
+    
+#ifdef FIXED_POINT_COMPENSATION
+    setTargetHeaterResistance(0, convertTemperatureResistanceInt(350,30));
+#else
+    setTargetHeaterResistance(0, convertTemperatureResistanceDouble(350,30));
+#endif
+
+    setMode(2);
+}
+
+void BME680::setForcedMode()
+{
+    //Select oversampling for T, P, H
+    setOversamplingTemperature(2);
+    setOversamplingPressure(5);
+    setOversamplingHumidity(1);
+
+    //Select IIR filter for pressure & temperature
+    setIIRfilterCoefficient(0);
+
+    //Enable gas coversion
+    runGasConversion();
+
+    //Select heater set-points to be used
+    setHeaterProfile(1);
+
+    //Define heater-on times
+    //Convert durations to register codes
+    //Set gas_wait_x<7:0> (time base unit is ms)
+    setGasWaitTime(0,25,4);
+
+#ifdef FIXED_POINT_COMPENSATION
+    setTargetHeaterResistance(0, convertTemperatureResistanceInt(350,30));
+#else
+    setTargetHeaterResistance(0, convertTemperatureResistanceDouble(350,30));
+#endif
+
+    //Set mode to sequential mode
+    //Set mode<1:0> to 0b01
+    setMode(1);
+}
+
+void BME680::setSequentialMode()
+{
+    //Select stand-by time between measurements
+    setWakePeriod(1);
+
+    //Select oversampling for T, P, H
+    setOversamplingTemperature(2);
+    setOversamplingPressure(5);
+    setOversamplingHumidity(1);
+
+    //Select IIR filter for pressure & temperature
+    setIIRfilterCoefficient(0);
+
+    //Enable gas coversion
+    runGasConversion();
+
+    //Select heater set-points to be used
+    setHeaterProfile(1);
+
+    //Define heater-on times
+    //Convert durations to register codes
+    //Set gas_wait_x<7:0> (time base unit is ms)
+    setGasWaitTime(0,25,4);
+
+    //Set heater temperatures
+    //Convert temperature to register code
+    //Set res_heat_x<7:0>
+
+#ifdef FIXED_POINT_COMPENSATION
+    setTargetHeaterResistance(0, convertTemperatureResistanceInt(350,30));
+#else
+    setTargetHeaterResistance(0, convertTemperatureResistanceDouble(350,30));
+#endif
+
+    //Set mode to sequential mode
+    //Set mode<1:0> to 0b11
+    setMode(3);
+}
 
 #ifdef FIXED_POINT_COMPENSATION
 int32_t BME680::getCompensatedTemperature(int field)
 {
-    uint32_t v_uncomp_temperature_u32 = getTemp1Data(field);
+    uint32_t v_uncomp_temperature_u32 = getUncompensatedTemp1Data(field);
 
     int32_t var1 = ((int32_t)v_uncomp_temperature_u32 >> 3) - ((int32_t)(par_T1 << 1));
     int32_t var2 = (var1 * (int32_t) par_T2) >> 11;
@@ -49,7 +153,7 @@
 
 int32_t BME680::getCompensateHumidity(int field)
 {
-    uint32_t v_uncomp_humidity_u32 = getHumidityData(field);
+    uint32_t v_uncomp_humidity_u32 = getUncompensatedHumidityData(field);
 
     int32_t temp_scaled = (t_fine * 5 + 128) >> 8;
     int32_t var1 = (int32_t)v_uncomp_humidity_u32 -
@@ -90,7 +194,7 @@
 
 int32_t BME680::getCompensatePressure(int field)
 {
-    uint32_t v_uncomp_pressure_u32 = getPressureData(field);
+    uint32_t v_uncomp_pressure_u32 = getUncompensatedPressureData(field);
 
     int32_t var1 = (((int32_t)t_fine) >> 1) - 64000;
     int32_t var2 = ((((var1 >> 2) * (var1 >> 2)) >> 11) * (int32_t)par_P6) >> 2;
@@ -156,7 +260,7 @@
 int32_t BME680::getCalculateGasInt(int field)
 {
     uint8_t gas_range_u8 = getGasResistanceRange(field);
-    uint16_t gas_adc_u16 = getGasResistanceData(field);
+    uint16_t gas_adc_u16 = getUncompensatedGasResistanceData(field);
 
     int64_t var1 = (int64_t)((1340 + (5 * (int64_t)range_switching_error)) *
                              ((int64_t)lookup_k1_range[gas_range_u8])) >> 16;
@@ -383,25 +487,25 @@
     return true;
 }
 
-uint32_t BME680::getPressureData(int field)
+uint32_t BME680::getUncompensatedPressureData(int field)
 {
     readRegister(0x1F + field * 0x11, 3);
     return (data[0] << 12) | (data[1] << 4) | (data[2] >> 4);
 }
 
-uint32_t BME680::getTemp1Data(int field)
+uint32_t BME680::getUncompensatedTemp1Data(int field)
 {
     readRegister(0x22 + field * 0x11, 3);
     return (data[0] << 12) | (data[1] << 4) | (data[2] >> 4);
 }
 
-uint32_t BME680::getHumidityData(int field)
+uint32_t BME680::getUncompensatedHumidityData(int field)
 {
     readRegister(0x25 + field * 0x11, 2);
     return (data[0] << 8) | data[1];
 }
 
-uint16_t BME680::getGasResistanceData(int field)
+uint16_t BME680::getUncompensatedGasResistanceData(int field)
 {
     readRegister(0x2A + field * 0x11, 2);
     return (data[0] << 2) | (data[1] >> 6);