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libraries/CN0398/CN0398.cpp@30:990ce210e8c2, 2016-10-24 (annotated)

Committer:
Adrian Suciu
Date:
Mon Oct 24 18:15:23 2016 +0300
Revision:
30:990ce210e8c2
Added example and library for the CN0398

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Adrian Suciu 30:990ce210e8c2 1 #include "CN0398.h"
Adrian Suciu 30:990ce210e8c2 2 #include "AD7124.h"
Adrian Suciu 30:990ce210e8c2 3 #include <mbed.h>
Adrian Suciu 30:990ce210e8c2 4
Adrian Suciu 30:990ce210e8c2 5 #define RREF (5000.0)
Adrian Suciu 30:990ce210e8c2 6 #define TEMP_GAIN (16.0)
Adrian Suciu 30:990ce210e8c2 7 #define PT100_RESISTANCE_TO_TEMP(x) ((x-100.0)/(0.385))
Adrian Suciu 30:990ce210e8c2 8 #define _2_23 (1<<23)
Adrian Suciu 30:990ce210e8c2 9
Adrian Suciu 30:990ce210e8c2 10 #define CALIBRATION_NR_OF_SAMPLES (5)
Adrian Suciu 30:990ce210e8c2 11
Adrian Suciu 30:990ce210e8c2 12 extern Serial pc;
Adrian Suciu 30:990ce210e8c2 13
Adrian Suciu 30:990ce210e8c2 14 #define ms_delay (1)
Adrian Suciu 30:990ce210e8c2 15
Adrian Suciu 30:990ce210e8c2 16 CN0398::CN0398(PinName cs, PinName adp7118enable) : ad7124(cs), ADP7118Enable(adp7118enable), offset_voltage(default_offset_voltage)
Adrian Suciu 30:990ce210e8c2 17 {
Adrian Suciu 30:990ce210e8c2 18 calibration_ph[0][0] = default_calibration_ph[0][0];
Adrian Suciu 30:990ce210e8c2 19 calibration_ph[0][1] = default_calibration_ph[0][1];
Adrian Suciu 30:990ce210e8c2 20 calibration_ph[1][0] = default_calibration_ph[1][0];
Adrian Suciu 30:990ce210e8c2 21 calibration_ph[1][1] = default_calibration_ph[1][1];
Adrian Suciu 30:990ce210e8c2 22 solution0 = 0;
Adrian Suciu 30:990ce210e8c2 23 solution1 = 0;
Adrian Suciu 30:990ce210e8c2 24 }
Adrian Suciu 30:990ce210e8c2 25
Adrian Suciu 30:990ce210e8c2 26 void CN0398::calibrate_ph_pt0(float temperature)
Adrian Suciu 30:990ce210e8c2 27 {
Adrian Suciu 30:990ce210e8c2 28 float volt = 0;
Adrian Suciu 30:990ce210e8c2 29 for(int i = 0; i < CALIBRATION_NR_OF_SAMPLES; i++) {
Adrian Suciu 30:990ce210e8c2 30 set_digital_output(P2, true);
Adrian Suciu 30:990ce210e8c2 31 int32_t data = read_channel(0);
Adrian Suciu 30:990ce210e8c2 32 set_digital_output(P2, false);
Adrian Suciu 30:990ce210e8c2 33 volt += data_to_voltage_bipolar(data >> 8, 1, 3.3);
Adrian Suciu 30:990ce210e8c2 34 }
Adrian Suciu 30:990ce210e8c2 35 volt = volt / CALIBRATION_NR_OF_SAMPLES;
Adrian Suciu 30:990ce210e8c2 36 if(temperature < 0) {
Adrian Suciu 30:990ce210e8c2 37 calibration_ph[0][0] = ph_temp_lut[solution0][0];
Adrian Suciu 30:990ce210e8c2 38 } else {
Adrian Suciu 30:990ce210e8c2 39 for(uint8_t i = 1; i < NUMBER_OF_TEMPERATURE_ENTRIES; i++) {
Adrian Suciu 30:990ce210e8c2 40 if(temperature > ph_temperatures[i - 1] && temperature <= ph_temperatures[i]) {
Adrian Suciu 30:990ce210e8c2 41 calibration_ph[0][0] = ph_temp_lut[solution0][i];
Adrian Suciu 30:990ce210e8c2 42 break;
Adrian Suciu 30:990ce210e8c2 43 }
Adrian Suciu 30:990ce210e8c2 44 }
Adrian Suciu 30:990ce210e8c2 45 }
Adrian Suciu 30:990ce210e8c2 46 calibration_ph[0][1] = volt;
Adrian Suciu 30:990ce210e8c2 47 pc.printf("Calibration solution 1 ph: %f with sensor voltage of %f\r\n", calibration_ph[0][0], volt);
Adrian Suciu 30:990ce210e8c2 48 }
Adrian Suciu 30:990ce210e8c2 49 void CN0398::calibrate_ph_pt1(float temperature)
Adrian Suciu 30:990ce210e8c2 50 {
Adrian Suciu 30:990ce210e8c2 51 float volt = 0;
Adrian Suciu 30:990ce210e8c2 52 for(int i = 0; i < CALIBRATION_NR_OF_SAMPLES; i++) {
Adrian Suciu 30:990ce210e8c2 53 set_digital_output(P2, true);
Adrian Suciu 30:990ce210e8c2 54 int32_t data = read_channel(0);
Adrian Suciu 30:990ce210e8c2 55 set_digital_output(P2, false);
Adrian Suciu 30:990ce210e8c2 56 volt += data_to_voltage_bipolar(data >> 8, 1, 3.3);
Adrian Suciu 30:990ce210e8c2 57 }
Adrian Suciu 30:990ce210e8c2 58
Adrian Suciu 30:990ce210e8c2 59 volt = volt / CALIBRATION_NR_OF_SAMPLES;
Adrian Suciu 30:990ce210e8c2 60 if(temperature < 0) {
Adrian Suciu 30:990ce210e8c2 61 calibration_ph[1][0] = ph_temp_lut[solution1][0];
Adrian Suciu 30:990ce210e8c2 62 } else {
Adrian Suciu 30:990ce210e8c2 63 for(uint8_t i = 1; i < NUMBER_OF_TEMPERATURE_ENTRIES; i++) {
Adrian Suciu 30:990ce210e8c2 64 if(temperature > ph_temperatures[i - 1] && temperature <= ph_temperatures[i]) {
Adrian Suciu 30:990ce210e8c2 65 calibration_ph[1][0] = ph_temp_lut[solution1][i];
Adrian Suciu 30:990ce210e8c2 66 break;
Adrian Suciu 30:990ce210e8c2 67 }
Adrian Suciu 30:990ce210e8c2 68 }
Adrian Suciu 30:990ce210e8c2 69 }
Adrian Suciu 30:990ce210e8c2 70 calibration_ph[1][1] = volt;
Adrian Suciu 30:990ce210e8c2 71 pc.printf("Calibration solution 2 ph: %f with sensor voltage of %f\r\n", calibration_ph[1][0], volt);
Adrian Suciu 30:990ce210e8c2 72 }
Adrian Suciu 30:990ce210e8c2 73
Adrian Suciu 30:990ce210e8c2 74 void CN0398::calibrate_ph_offset()
Adrian Suciu 30:990ce210e8c2 75 {
Adrian Suciu 30:990ce210e8c2 76 float volt = 0;
Adrian Suciu 30:990ce210e8c2 77 for(int i = 0; i < CALIBRATION_NR_OF_SAMPLES; i++) {
Adrian Suciu 30:990ce210e8c2 78 set_digital_output(P2, true);
Adrian Suciu 30:990ce210e8c2 79 int32_t data = read_channel(0);
Adrian Suciu 30:990ce210e8c2 80 set_digital_output(P2, false);
Adrian Suciu 30:990ce210e8c2 81 volt += data_to_voltage_bipolar(data >> 8, 1, 3.3);
Adrian Suciu 30:990ce210e8c2 82 }
Adrian Suciu 30:990ce210e8c2 83 offset_voltage = volt / CALIBRATION_NR_OF_SAMPLES;
Adrian Suciu 30:990ce210e8c2 84 pc.printf("Offset voltage is: %f \r\n", volt);
Adrian Suciu 30:990ce210e8c2 85 }
Adrian Suciu 30:990ce210e8c2 86
Adrian Suciu 30:990ce210e8c2 87
Adrian Suciu 30:990ce210e8c2 88 float CN0398::read_rtd()
Adrian Suciu 30:990ce210e8c2 89 {
Adrian Suciu 30:990ce210e8c2 90 float temperature = 25.0;
Adrian Suciu 30:990ce210e8c2 91 #ifdef TEMPERATURE_SENSOR_PRESENT
Adrian Suciu 30:990ce210e8c2 92 int32_t data = read_channel(2);
Adrian Suciu 30:990ce210e8c2 93 data = (data >> 8) & 0x00ffffff;
Adrian Suciu 30:990ce210e8c2 94 float resistance = ((static_cast<float>(data) - _2_23) * RREF) / (TEMP_GAIN * _2_23);
Adrian Suciu 30:990ce210e8c2 95 #ifdef USE_LINEAR_TEMP_EQ
Adrian Suciu 30:990ce210e8c2 96 temperature = PT100_RESISTANCE_TO_TEMP(resistance);
Adrian Suciu 30:990ce210e8c2 97 #else
Adrian Suciu 30:990ce210e8c2 98
Adrian Suciu 30:990ce210e8c2 99 #define A (3.9083*pow(10,-3))
Adrian Suciu 30:990ce210e8c2 100 #define B (-5.775*pow(10,-7))
Adrian Suciu 30:990ce210e8c2 101 /*if(resistance < 100.0)
Adrian Suciu 30:990ce210e8c2 102 temperature = -242.02 + 2.228 * resistance + (2.5859 * pow(10, -3)) * pow(resistance, 2) - (48260 * pow(10, -6)) * pow(resistance, 3) - (2.8183 * pow(10, -3)) * pow(resistance, 4) + (1.5243 * pow(10, -10)) * pow(resistance, 5);
Adrian Suciu 30:990ce210e8c2 103 else*/
Adrian Suciu 30:990ce210e8c2 104 temperature = ((-A + sqrt(double(pow(A, 2) - 4 * B * (1 - resistance / 100.0))) ) / (2 * B));
Adrian Suciu 30:990ce210e8c2 105 #endif
Adrian Suciu 30:990ce210e8c2 106 #endif
Adrian Suciu 30:990ce210e8c2 107 return temperature;
Adrian Suciu 30:990ce210e8c2 108
Adrian Suciu 30:990ce210e8c2 109 }
Adrian Suciu 30:990ce210e8c2 110
Adrian Suciu 30:990ce210e8c2 111 int32_t CN0398::read_channel(uint8_t ch)
Adrian Suciu 30:990ce210e8c2 112 {
Adrian Suciu 30:990ce210e8c2 113 int32_t data;
Adrian Suciu 30:990ce210e8c2 114 enable_channel(ch);
Adrian Suciu 30:990ce210e8c2 115 start_single_conversion();
Adrian Suciu 30:990ce210e8c2 116
Adrian Suciu 30:990ce210e8c2 117 if (ad7124.WaitForConvReady(10000) == -3) {
Adrian Suciu 30:990ce210e8c2 118 pc.printf("TIMEOUT");
Adrian Suciu 30:990ce210e8c2 119 return -1;
Adrian Suciu 30:990ce210e8c2 120 }
Adrian Suciu 30:990ce210e8c2 121 ad7124.ReadData(&data);
Adrian Suciu 30:990ce210e8c2 122 disable_channel(ch);
Adrian Suciu 30:990ce210e8c2 123 return data;
Adrian Suciu 30:990ce210e8c2 124
Adrian Suciu 30:990ce210e8c2 125 }
Adrian Suciu 30:990ce210e8c2 126 float CN0398::read_ph(float temperature)
Adrian Suciu 30:990ce210e8c2 127 {
Adrian Suciu 30:990ce210e8c2 128 float ph = 0;
Adrian Suciu 30:990ce210e8c2 129 #ifdef PH_SENSOR_PRESENT
Adrian Suciu 30:990ce210e8c2 130 set_digital_output(P2, true);
Adrian Suciu 30:990ce210e8c2 131 int32_t data = read_channel(0);
Adrian Suciu 30:990ce210e8c2 132 set_digital_output(P2, false);
Adrian Suciu 30:990ce210e8c2 133 float volt = data_to_voltage_bipolar(data >> 8, 1, 3.3);
Adrian Suciu 30:990ce210e8c2 134 #ifdef DEBUG_MODE
Adrian Suciu 30:990ce210e8c2 135 pc.printf("pH sensor voltage - %f\n", volt);
Adrian Suciu 30:990ce210e8c2 136 #endif
Adrian Suciu 30:990ce210e8c2 137
Adrian Suciu 30:990ce210e8c2 138 if(use_nernst) {
Adrian Suciu 30:990ce210e8c2 139 ph = -((volt - ZERO_POINT_TOLERANCE) / ((2.303 * AVOGADRO * (temperature + KELVIN_OFFSET)) / FARADAY_CONSTANT) ) + PH_ISO;
Adrian Suciu 30:990ce210e8c2 140 } else {
Adrian Suciu 30:990ce210e8c2 141 float m = (calibration_ph[1][0] - calibration_ph[0][0]) / (calibration_ph[1][1] - calibration_ph[0][1]);
Adrian Suciu 30:990ce210e8c2 142 ph = m * (volt - calibration_ph[1][1] + offset_voltage) + calibration_ph[1][0];
Adrian Suciu 30:990ce210e8c2 143 }
Adrian Suciu 30:990ce210e8c2 144 #endif
Adrian Suciu 30:990ce210e8c2 145 return ph;
Adrian Suciu 30:990ce210e8c2 146 }
Adrian Suciu 30:990ce210e8c2 147 float CN0398::read_moist()
Adrian Suciu 30:990ce210e8c2 148 {
Adrian Suciu 30:990ce210e8c2 149 float moisture = 0;
Adrian Suciu 30:990ce210e8c2 150 #ifdef MOISTURE_SENSOR_PRESENT
Adrian Suciu 30:990ce210e8c2 151 ADP7118Enable = true;
Adrian Suciu 30:990ce210e8c2 152 set_digital_output(P3, true);
Adrian Suciu 30:990ce210e8c2 153 wait_ms(SENSOR_SETTLING_TIME);
Adrian Suciu 30:990ce210e8c2 154 int32_t data = read_channel(1);
Adrian Suciu 30:990ce210e8c2 155 ADP7118Enable = false;
Adrian Suciu 30:990ce210e8c2 156 set_digital_output(P3, false);
Adrian Suciu 30:990ce210e8c2 157
Adrian Suciu 30:990ce210e8c2 158 data = (data >> 8) & 0x00ffffff;
Adrian Suciu 30:990ce210e8c2 159 float volt = data_to_voltage(data, 1, 3.3);
Adrian Suciu 30:990ce210e8c2 160 #ifdef USE_MANUFACTURER_MOISTURE_EQ
Adrian Suciu 30:990ce210e8c2 161 if(volt <= 1.1) {
Adrian Suciu 30:990ce210e8c2 162 moisture = 10 * volt - 1;
Adrian Suciu 30:990ce210e8c2 163 } else if(volt > 1.1 && volt <= 1.3) {
Adrian Suciu 30:990ce210e8c2 164 moisture = 25 * volt - 17.5;
Adrian Suciu 30:990ce210e8c2 165 } else if(volt > 1.3 && volt <= 1.82) {
Adrian Suciu 30:990ce210e8c2 166 moisture = 48.08 * volt - 47.5;
Adrian Suciu 30:990ce210e8c2 167 } else if(volt > 1.82) {
Adrian Suciu 30:990ce210e8c2 168 moisture = 26.32 * volt - 7.89;
Adrian Suciu 30:990ce210e8c2 169 }
Adrian Suciu 30:990ce210e8c2 170 #else
Adrian Suciu 30:990ce210e8c2 171 moisture = -1.18467 + 21.5371 * volt - 110.996 * (pow(volt, 2)) + 397.025 * (pow(volt, 3)) - 666.986 * (pow(volt, 4)) + 569.236 * (pow(volt, 5)) - 246.005 * (pow(volt, 6)) + 49.4867 * (pow(volt, 7)) - 3.37077 * (pow(volt, 8));
Adrian Suciu 30:990ce210e8c2 172 #endif
Adrian Suciu 30:990ce210e8c2 173 if(moisture > 100) moisture = 100;
Adrian Suciu 30:990ce210e8c2 174 if(moisture < 0 ) moisture = 0;
Adrian Suciu 30:990ce210e8c2 175 #endif
Adrian Suciu 30:990ce210e8c2 176 return moisture;
Adrian Suciu 30:990ce210e8c2 177 }
Adrian Suciu 30:990ce210e8c2 178
Adrian Suciu 30:990ce210e8c2 179 float CN0398::data_to_voltage_bipolar(uint32_t data, uint8_t gain, float VREF)
Adrian Suciu 30:990ce210e8c2 180 {
Adrian Suciu 30:990ce210e8c2 181 data = data & 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 182 return ((data / static_cast<float>(0xFFFFFF / 2)) - 1) * (VREF / gain);
Adrian Suciu 30:990ce210e8c2 183 }
Adrian Suciu 30:990ce210e8c2 184
Adrian Suciu 30:990ce210e8c2 185 float CN0398::data_to_voltage(uint32_t data, uint8_t gain, float VREF)
Adrian Suciu 30:990ce210e8c2 186 {
Adrian Suciu 30:990ce210e8c2 187 data = data & 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 188 return (data / static_cast<float>(0xFFFFFF)) * (VREF / gain);
Adrian Suciu 30:990ce210e8c2 189 }
Adrian Suciu 30:990ce210e8c2 190
Adrian Suciu 30:990ce210e8c2 191 void CN0398::enable_channel(int channel)
Adrian Suciu 30:990ce210e8c2 192 {
Adrian Suciu 30:990ce210e8c2 193 AD7124::ad7124_registers regNr = static_cast<AD7124::ad7124_registers> (AD7124::AD7124_Channel_0 + channel); //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 194 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 195 setValue |= (uint32_t) AD7124_CH_MAP_REG_CH_ENABLE; //Enable channel0
Adrian Suciu 30:990ce210e8c2 196 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 197 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 198 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 199 }
Adrian Suciu 30:990ce210e8c2 200
Adrian Suciu 30:990ce210e8c2 201 void CN0398::disable_channel(int channel)
Adrian Suciu 30:990ce210e8c2 202 {
Adrian Suciu 30:990ce210e8c2 203 AD7124::ad7124_registers regNr = static_cast<AD7124::ad7124_registers> (AD7124::AD7124_Channel_0 + channel); //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 204 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 205 setValue &= (~(uint32_t) AD7124_CH_MAP_REG_CH_ENABLE); //Enable channel0
Adrian Suciu 30:990ce210e8c2 206 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 207 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 208 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 209 }
Adrian Suciu 30:990ce210e8c2 210
Adrian Suciu 30:990ce210e8c2 211 /*
Adrian Suciu 30:990ce210e8c2 212 void CN0398::enable_current_source0(int current_source_channel)
Adrian Suciu 30:990ce210e8c2 213 {
Adrian Suciu 30:990ce210e8c2 214 AD7124::ad7124_registers regNr = AD7124::AD7124_IOCon1; //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 215 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 216 setValue &= ~(AD7124_IO_CTRL1_REG_IOUT_CH0(0xF));
Adrian Suciu 30:990ce210e8c2 217 setValue |= AD7124_IO_CTRL1_REG_IOUT_CH0(current_source_channel);// set IOUT0 current to 500uA
Adrian Suciu 30:990ce210e8c2 218 setValue &= 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 219 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 220 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 221 }
Adrian Suciu 30:990ce210e8c2 222
Adrian Suciu 30:990ce210e8c2 223 void CN0398::enable_current_source1(int current_source_channel)
Adrian Suciu 30:990ce210e8c2 224 {
Adrian Suciu 30:990ce210e8c2 225 AD7124::ad7124_registers regNr = AD7124::AD7124_IOCon1; //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 226 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 227 setValue &= ~(AD7124_IO_CTRL1_REG_IOUT_CH1(0xF));
Adrian Suciu 30:990ce210e8c2 228 setValue |= AD7124_IO_CTRL1_REG_IOUT_CH1(current_source_channel);// set IOUT0 current to 500uA
Adrian Suciu 30:990ce210e8c2 229 setValue &= 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 230 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 231 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 232 }*/
Adrian Suciu 30:990ce210e8c2 233
Adrian Suciu 30:990ce210e8c2 234 void CN0398::set_digital_output(ad_digital_output_t p, bool state)
Adrian Suciu 30:990ce210e8c2 235 {
Adrian Suciu 30:990ce210e8c2 236 AD7124::ad7124_registers regNr = AD7124::AD7124_IOCon1; //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 237 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 238 if(state)
Adrian Suciu 30:990ce210e8c2 239 setValue |= ((AD7124_8_IO_CTRL1_REG_GPIO_DAT1) << p);
Adrian Suciu 30:990ce210e8c2 240 else
Adrian Suciu 30:990ce210e8c2 241 setValue &= (~((AD7124_8_IO_CTRL1_REG_GPIO_DAT1) << p));
Adrian Suciu 30:990ce210e8c2 242 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 243 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 244 }
Adrian Suciu 30:990ce210e8c2 245
Adrian Suciu 30:990ce210e8c2 246
Adrian Suciu 30:990ce210e8c2 247 void CN0398::start_single_conversion()
Adrian Suciu 30:990ce210e8c2 248 {
Adrian Suciu 30:990ce210e8c2 249 AD7124::ad7124_registers regNr = AD7124::AD7124_ADC_Control; //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 250 uint32_t setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 251 setValue &= 0xFFC3;
Adrian Suciu 30:990ce210e8c2 252 setValue |= 0x04; //single conversion;
Adrian Suciu 30:990ce210e8c2 253 setValue |= AD7124_ADC_CTRL_REG_DATA_STATUS;
Adrian Suciu 30:990ce210e8c2 254 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 255 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC*/
Adrian Suciu 30:990ce210e8c2 256 wait_ms(ms_delay * 10);
Adrian Suciu 30:990ce210e8c2 257 }
Adrian Suciu 30:990ce210e8c2 258
Adrian Suciu 30:990ce210e8c2 259 void CN0398::reset()
Adrian Suciu 30:990ce210e8c2 260 {
Adrian Suciu 30:990ce210e8c2 261 ad7124.frequency(500000);
Adrian Suciu 30:990ce210e8c2 262 ad7124.Reset();
Adrian Suciu 30:990ce210e8c2 263 pc.printf("Reseted AD7124\r\n");
Adrian Suciu 30:990ce210e8c2 264 wait_ms(1000);
Adrian Suciu 30:990ce210e8c2 265 }
Adrian Suciu 30:990ce210e8c2 266
Adrian Suciu 30:990ce210e8c2 267 void CN0398::setup()
Adrian Suciu 30:990ce210e8c2 268 {
Adrian Suciu 30:990ce210e8c2 269 ad7124.Setup();
Adrian Suciu 30:990ce210e8c2 270 }
Adrian Suciu 30:990ce210e8c2 271
Adrian Suciu 30:990ce210e8c2 272 void CN0398::init()
Adrian Suciu 30:990ce210e8c2 273 {
Adrian Suciu 30:990ce210e8c2 274 uint32_t setValue;
Adrian Suciu 30:990ce210e8c2 275 enum AD7124::ad7124_registers regNr;
Adrian Suciu 30:990ce210e8c2 276
Adrian Suciu 30:990ce210e8c2 277 /* Set Config_0 0x19*/
Adrian Suciu 30:990ce210e8c2 278 regNr = AD7124::AD7124_Config_0; //Select Config_0 register - pH
Adrian Suciu 30:990ce210e8c2 279 setValue = 0;//ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 280 setValue |= AD7124_CFG_REG_BIPOLAR; //Select bipolar operation
Adrian Suciu 30:990ce210e8c2 281 setValue |= AD7124_CFG_REG_BURNOUT(0); //Burnout current source off
Adrian Suciu 30:990ce210e8c2 282 setValue |= AD7124_CFG_REG_REF_BUFP;
Adrian Suciu 30:990ce210e8c2 283 setValue |= AD7124_CFG_REG_REF_BUFM;
Adrian Suciu 30:990ce210e8c2 284 setValue |= AD7124_CFG_REG_AIN_BUFP; //Buffer AIN5
Adrian Suciu 30:990ce210e8c2 285 setValue |= AD7124_CFG_REG_AINN_BUFM; //Buffer AIN4
Adrian Suciu 30:990ce210e8c2 286 setValue |= AD7124_CFG_REG_REF_SEL(0); //REFIN1(+)/REFIN1(−).
Adrian Suciu 30:990ce210e8c2 287 setValue |= AD7124_CFG_REG_PGA(0);
Adrian Suciu 30:990ce210e8c2 288 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 289 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 290
Adrian Suciu 30:990ce210e8c2 291 /* Set Config_0 0x1A*/
Adrian Suciu 30:990ce210e8c2 292 regNr = AD7124::AD7124_Config_1; //Select Config_1 register - Moisture
Adrian Suciu 30:990ce210e8c2 293 setValue = 0;//ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 294 setValue &= ~AD7124_CFG_REG_BIPOLAR; //Select bipolar operation
Adrian Suciu 30:990ce210e8c2 295 setValue |= AD7124_CFG_REG_BURNOUT(0); //Burnout current source off
Adrian Suciu 30:990ce210e8c2 296 setValue |= AD7124_CFG_REG_REF_BUFP;
Adrian Suciu 30:990ce210e8c2 297 setValue |= AD7124_CFG_REG_REF_BUFM;
Adrian Suciu 30:990ce210e8c2 298 setValue |= AD7124_CFG_REG_AIN_BUFP; //Buffer AIN5
Adrian Suciu 30:990ce210e8c2 299 setValue |= AD7124_CFG_REG_AINN_BUFM; //Buffer AIN4*/
Adrian Suciu 30:990ce210e8c2 300 setValue |= AD7124_CFG_REG_REF_SEL(0); // REFIN1(+)/REFIN1(−).
Adrian Suciu 30:990ce210e8c2 301 setValue |= AD7124_CFG_REG_PGA(0);
Adrian Suciu 30:990ce210e8c2 302 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 303 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 304
Adrian Suciu 30:990ce210e8c2 305 /* Set Config_0 0x1B*/
Adrian Suciu 30:990ce210e8c2 306 regNr = AD7124::AD7124_Config_2; //Select Config_2 register - temp
Adrian Suciu 30:990ce210e8c2 307 setValue = 0;//ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 308 setValue |= AD7124_CFG_REG_BIPOLAR; //Select bipolar operation
Adrian Suciu 30:990ce210e8c2 309 setValue |= AD7124_CFG_REG_BURNOUT(0); //Burnout current source off
Adrian Suciu 30:990ce210e8c2 310 setValue |= AD7124_CFG_REG_REF_BUFP;
Adrian Suciu 30:990ce210e8c2 311 setValue |= AD7124_CFG_REG_REF_BUFM;
Adrian Suciu 30:990ce210e8c2 312 setValue |= AD7124_CFG_REG_AIN_BUFP; //Buffer AIN5
Adrian Suciu 30:990ce210e8c2 313 setValue |= AD7124_CFG_REG_AINN_BUFM; //Buffer AIN4
Adrian Suciu 30:990ce210e8c2 314 setValue |= AD7124_CFG_REG_REF_SEL(1); //REFIN2(+)/REFIN2(-).
Adrian Suciu 30:990ce210e8c2 315 setValue |= AD7124_CFG_REG_PGA(4); // gain 16
Adrian Suciu 30:990ce210e8c2 316 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 317 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 318
Adrian Suciu 30:990ce210e8c2 319 /* Set Channel_0 register 0x09*/
Adrian Suciu 30:990ce210e8c2 320 regNr = AD7124::AD7124_Channel_0; // pH reading
Adrian Suciu 30:990ce210e8c2 321 setValue = 0;
Adrian Suciu 30:990ce210e8c2 322 setValue |= AD7124_CH_MAP_REG_SETUP(0); // Select setup0
Adrian Suciu 30:990ce210e8c2 323 setValue |= AD7124_CH_MAP_REG_AINP(6); // Set AIN4 as positive input
Adrian Suciu 30:990ce210e8c2 324 setValue |= AD7124_CH_MAP_REG_AINM(7); // Set AIN5 as negative input
Adrian Suciu 30:990ce210e8c2 325 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 326 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 327
Adrian Suciu 30:990ce210e8c2 328 regNr = AD7124::AD7124_Channel_1; // Moisture
Adrian Suciu 30:990ce210e8c2 329 setValue = 0;
Adrian Suciu 30:990ce210e8c2 330 setValue |= AD7124_CH_MAP_REG_SETUP(1); // Select setup0
Adrian Suciu 30:990ce210e8c2 331 setValue |= AD7124_CH_MAP_REG_AINP(8); // Set AIN4 as positive input
Adrian Suciu 30:990ce210e8c2 332 setValue |= AD7124_CH_MAP_REG_AINM(19); // Set AIN5 as negative input
Adrian Suciu 30:990ce210e8c2 333 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 334 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 335
Adrian Suciu 30:990ce210e8c2 336 regNr = AD7124::AD7124_Channel_2; // RTD - gain 16
Adrian Suciu 30:990ce210e8c2 337 setValue = 0;
Adrian Suciu 30:990ce210e8c2 338 setValue |= AD7124_CH_MAP_REG_SETUP(2); // Select setup0
Adrian Suciu 30:990ce210e8c2 339 setValue |= AD7124_CH_MAP_REG_AINP(9); // Set AIN4 as positive input
Adrian Suciu 30:990ce210e8c2 340 setValue |= AD7124_CH_MAP_REG_AINM(10); // Set AIN5 as negative input
Adrian Suciu 30:990ce210e8c2 341 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 342 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 343
Adrian Suciu 30:990ce210e8c2 344 /* Set IO_Control_1 0x03 */
Adrian Suciu 30:990ce210e8c2 345 regNr = AD7124::AD7124_IOCon1; //Select IO_Control_1 register
Adrian Suciu 30:990ce210e8c2 346 //setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 347 setValue = 0;
Adrian Suciu 30:990ce210e8c2 348 setValue |= AD7124_8_IO_CTRL1_REG_GPIO_CTRL2; // enable AIN3 as digital output
Adrian Suciu 30:990ce210e8c2 349 setValue |= AD7124_8_IO_CTRL1_REG_GPIO_CTRL3; // enable AIN4 as digital output
Adrian Suciu 30:990ce210e8c2 350 setValue |= AD7124_IO_CTRL1_REG_IOUT_CH0(11); // source ain11
Adrian Suciu 30:990ce210e8c2 351 setValue |= AD7124_IO_CTRL1_REG_IOUT_CH1(12); // source ain12
Adrian Suciu 30:990ce210e8c2 352 setValue |= AD7124_IO_CTRL1_REG_IOUT0(0x4);// set IOUT0 current to 500uA
Adrian Suciu 30:990ce210e8c2 353 setValue |= AD7124_IO_CTRL1_REG_IOUT1(0x4);// set IOUT0 current to 500uA*/
Adrian Suciu 30:990ce210e8c2 354 setValue &= 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 355 ad7124.WriteDeviceRegister(regNr, setValue);// Write data to ADC
Adrian Suciu 30:990ce210e8c2 356
Adrian Suciu 30:990ce210e8c2 357 // Set IO_Control_2
Adrian Suciu 30:990ce210e8c2 358 regNr = AD7124::AD7124_IOCon2; //Select IO_Control_2 register
Adrian Suciu 30:990ce210e8c2 359 setValue = 0;
Adrian Suciu 30:990ce210e8c2 360 setValue |= AD7124_8_IO_CTRL2_REG_GPIO_VBIAS7; // enable AIN3 as digital output
Adrian Suciu 30:990ce210e8c2 361 setValue &= 0xFFFFFF;
Adrian Suciu 30:990ce210e8c2 362 ad7124.WriteDeviceRegister(regNr, setValue);// Write data to ADC
Adrian Suciu 30:990ce210e8c2 363
Adrian Suciu 30:990ce210e8c2 364
Adrian Suciu 30:990ce210e8c2 365 /* Set ADC_Control 0x01 */
Adrian Suciu 30:990ce210e8c2 366 regNr = AD7124::AD7124_ADC_Control; //Select ADC_Control register
Adrian Suciu 30:990ce210e8c2 367 setValue = ad7124.ReadDeviceRegister(regNr);
Adrian Suciu 30:990ce210e8c2 368 setValue |= AD7124_ADC_CTRL_REG_DATA_STATUS; // set data status bit in order to check on which channel the conversion is
Adrian Suciu 30:990ce210e8c2 369 setValue &= 0xFFC3; // remove prev mode bits
Adrian Suciu 30:990ce210e8c2 370 setValue |= AD7124_ADC_CTRL_REG_MODE(2);
Adrian Suciu 30:990ce210e8c2 371 setValue &= 0xFFFF;
Adrian Suciu 30:990ce210e8c2 372 ad7124.WriteDeviceRegister(regNr, setValue); // Write data to ADC
Adrian Suciu 30:990ce210e8c2 373 wait_ms(ms_delay);
Adrian Suciu 30:990ce210e8c2 374 }
Adrian Suciu 30:990ce210e8c2 375
Adrian Suciu 30:990ce210e8c2 376
Adrian Suciu 30:990ce210e8c2 377
Adrian Suciu 30:990ce210e8c2 378
Adrian Suciu 30:990ce210e8c2 379