Mateusz Grzywacz / SDI12_device

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SDI12_device.h@7:1f506c65c4e8, 2018-08-01 (annotated)

Committer:
amateusz
Date:
Wed Aug 01 17:29:51 2018 +0000
Revision:
7:1f506c65c4e8
Parent:
6:d9a5240a99fd
Child:
8:1beed160ed13
changed logic. finally works without goto (sic!)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
amateusz 0:d58ebb2bed9a 1 #include "SDI12.h"
amateusz 0:d58ebb2bed9a 2 #include <string>
amateusz 2:e2db05bc4708 3 #include "mbed.h"
amateusz 0:d58ebb2bed9a 4
amateusz 0:d58ebb2bed9a 5 class SDI12_device
amateusz 0:d58ebb2bed9a 6 {
amateusz 0:d58ebb2bed9a 7 public:
amateusz 0:d58ebb2bed9a 8 struct Identification_struct {
amateusz 0:d58ebb2bed9a 9 unsigned char sdi_version;
amateusz 0:d58ebb2bed9a 10 char company[8+1];
amateusz 0:d58ebb2bed9a 11 char model[6+1];
amateusz 0:d58ebb2bed9a 12 char version[3+1];
amateusz 0:d58ebb2bed9a 13 };
amateusz 0:d58ebb2bed9a 14
amateusz 0:d58ebb2bed9a 15 struct Measurement_struct {
amateusz 0:d58ebb2bed9a 16 unsigned long timestampMeasurementReadyAt;
amateusz 4:11438803516c 17 char readyIn;
amateusz 0:d58ebb2bed9a 18 bool _measurementAlreadyRead;
amateusz 0:d58ebb2bed9a 19 char count;
amateusz 4:11438803516c 20 float values[48]; // not float values [] !! :O
amateusz 0:d58ebb2bed9a 21 };
amateusz 0:d58ebb2bed9a 22
amateusz 0:d58ebb2bed9a 23 Identification_struct _ident_struct;
amateusz 0:d58ebb2bed9a 24
amateusz 0:d58ebb2bed9a 25 static int detect(SDI12 &sdi12, char indices[]) {
amateusz 0:d58ebb2bed9a 26 char found = 0;
amateusz 5:e53104570fde 27 for (size_t i = 0; i < ADDRRICES.size(); ++i) {
amateusz 7:1f506c65c4e8 28
amateusz 0:d58ebb2bed9a 29 string question = "?!";
amateusz 5:e53104570fde 30 question[0] = ADDRRICES[i];
amateusz 0:d58ebb2bed9a 31 sdi12.sendCommand(question);
amateusz 0:d58ebb2bed9a 32 std::string response;
amateusz 7:1f506c65c4e8 33 debug("SEARCHING: %d\r\n", i);
amateusz 0:d58ebb2bed9a 34 Timer detectTimer;
amateusz 0:d58ebb2bed9a 35 detectTimer.start();
amateusz 7:1f506c65c4e8 36 while (detectTimer.read_ms() < RESPONSE_TIMEOUT) {
amateusz 5:e53104570fde 37 if (sdi12.RxInProgress()) detectTimer.reset();
amateusz 7:1f506c65c4e8 38 if (sdi12.RxBufferAvailable()) {
amateusz 7:1f506c65c4e8 39 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 7:1f506c65c4e8 40 char buffer[bufferSize];
amateusz 7:1f506c65c4e8 41 sdi12.getRxBuffer(buffer);
amateusz 7:1f506c65c4e8 42 // if first char is valid address char
amateusz 7:1f506c65c4e8 43 if (ADDRRICES.find(buffer[0])) {
amateusz 5:e53104570fde 44 // if (buffer[0] >= '0' && buffer[0] <= '9' ||
amateusz 5:e53104570fde 45 // buffer[0] >= 'a' && buffer[0] <= 'z' ||
amateusz 5:e53104570fde 46 // buffer[0] >= 'A' && buffer[0] <= 'Z') {
amateusz 7:1f506c65c4e8 47 indices[found++] = buffer[0];
amateusz 7:1f506c65c4e8 48 debug("FOUND: %d -> %c\r\n", i, indices[found-1]);
amateusz 7:1f506c65c4e8 49 }
amateusz 7:1f506c65c4e8 50
amateusz 7:1f506c65c4e8 51 }
amateusz 0:d58ebb2bed9a 52 }
amateusz 7:1f506c65c4e8 53
amateusz 0:d58ebb2bed9a 54 }
amateusz 0:d58ebb2bed9a 55 return found;
amateusz 0:d58ebb2bed9a 56 };
amateusz 0:d58ebb2bed9a 57
amateusz 2:e2db05bc4708 58 SDI12_device (SDI12 &inst, char address, EventQueue &mainDispatcher) : _sdi12(inst) {
amateusz 0:d58ebb2bed9a 59 setAddress(address);
amateusz 2:e2db05bc4708 60 sensorQueue.chain(&mainDispatcher);
amateusz 1:6b1a21925a81 61 if(getIdentification(_ident_struct));
amateusz 0:d58ebb2bed9a 62 };
amateusz 5:e53104570fde 63 ~SDI12_device () {
amateusz 5:e53104570fde 64 // unchain event queue
amateusz 5:e53104570fde 65 sensorQueue.cancel(_measurementEventId);
amateusz 5:e53104570fde 66 sensorQueue.chain(NULL);
amateusz 5:e53104570fde 67 }
amateusz 0:d58ebb2bed9a 68
amateusz 0:d58ebb2bed9a 69 // void printIdentification(){
amateusz 0:d58ebb2bed9a 70 // Serial.println(_ident_struct.company);
amateusz 0:d58ebb2bed9a 71 // Serial.println(_ident_struct.model);
amateusz 0:d58ebb2bed9a 72 // Serial.println(_ident_struct.version);
amateusz 0:d58ebb2bed9a 73 // }
amateusz 0:d58ebb2bed9a 74 //
amateusz 2:e2db05bc4708 75
amateusz 0:d58ebb2bed9a 76 // // returns after how many seconds a measurement will be ready
amateusz 2:e2db05bc4708 77 int measure(bool concurrent = true) {
amateusz 4:11438803516c 78
amateusz 2:e2db05bc4708 79 std::string question = string("?") + string(concurrent?"C":"M") + string("!");
amateusz 2:e2db05bc4708 80 question[0] = _address;
amateusz 2:e2db05bc4708 81 _sdi12.sendCommand(question);
amateusz 2:e2db05bc4708 82
amateusz 2:e2db05bc4708 83 Timer timeout;
amateusz 2:e2db05bc4708 84 timeout.start();
amateusz 2:e2db05bc4708 85 while (sdi12.RxBufferAvailable() == 0) {
amateusz 2:e2db05bc4708 86 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 87 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 2:e2db05bc4708 88 return false;
amateusz 2:e2db05bc4708 89 }
amateusz 2:e2db05bc4708 90 }
amateusz 2:e2db05bc4708 91 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 2:e2db05bc4708 92 char buffer[bufferSize+1];
amateusz 2:e2db05bc4708 93 sdi12.getRxBuffer(buffer);
amateusz 2:e2db05bc4708 94 buffer[bufferSize] = '\0';
amateusz 2:e2db05bc4708 95 std::string response(buffer);
amateusz 2:e2db05bc4708 96
amateusz 2:e2db05bc4708 97 if (response[0] == _address) {
amateusz 2:e2db05bc4708 98 char measurementsCount = std::atoi(response.substr(1+3,(concurrent?2:1)).c_str());
amateusz 2:e2db05bc4708 99 char waitFor = std::atoi(response.substr(1,3).c_str());
amateusz 2:e2db05bc4708 100 _measurement.count = measurementsCount;
amateusz 4:11438803516c 101 _measurement.readyIn = waitFor;
amateusz 2:e2db05bc4708 102 // _measurement.timestampMeasurementReadyAt
amateusz 2:e2db05bc4708 103 debug("wait for %d measurement for %d seconds...", _measurement.count, waitFor);
amateusz 5:e53104570fde 104 _measurementEventId = sensorQueue.call_in(waitFor * 1000, callback(this, &SDI12_device::read));
amateusz 5:e53104570fde 105 debug("measurement scheduled");
amateusz 4:11438803516c 106 // if (_measurement.values != NULL) delete[] _measurement.values;
amateusz 4:11438803516c 107 // _measurement.values = new float[measurementsCount];
amateusz 2:e2db05bc4708 108 return 0;
amateusz 2:e2db05bc4708 109 }
amateusz 2:e2db05bc4708 110 return -1;
amateusz 2:e2db05bc4708 111 };
amateusz 0:d58ebb2bed9a 112 //
amateusz 0:d58ebb2bed9a 113 // bool isMeasurementReady(){
amateusz 0:d58ebb2bed9a 114 // return (((unsigned)(_measurement.timestampMeasurementReadyAt - millis())>0)?false:true);
amateusz 0:d58ebb2bed9a 115 // };
amateusz 0:d58ebb2bed9a 116 //
amateusz 0:d58ebb2bed9a 117 // short unsigned int measurementReadyIn(){ // ms
amateusz 0:d58ebb2bed9a 118 // if (isMeasurementReady())
amateusz 0:d58ebb2bed9a 119 // return 0;
amateusz 0:d58ebb2bed9a 120 // else{
amateusz 0:d58ebb2bed9a 121 // return _measurement.timestampMeasurementReadyAt - millis();
amateusz 0:d58ebb2bed9a 122 // }
amateusz 0:d58ebb2bed9a 123 // };
amateusz 0:d58ebb2bed9a 124 //
amateusz 4:11438803516c 125 char readyIn() {
amateusz 4:11438803516c 126 return _measurement.readyIn;
amateusz 4:11438803516c 127 }
amateusz 4:11438803516c 128
amateusz 2:e2db05bc4708 129 bool read() {
amateusz 3:2847f7c543d3 130 char valuesAlreadyRead = 0;
amateusz 2:e2db05bc4708 131 std::string question = string("?") + string("D0") + string("!");
amateusz 2:e2db05bc4708 132 question[0] = _address;
amateusz 2:e2db05bc4708 133 _sdi12.sendCommand(question);
amateusz 2:e2db05bc4708 134
amateusz 2:e2db05bc4708 135 Timer timeout;
amateusz 2:e2db05bc4708 136 timeout.start();
amateusz 2:e2db05bc4708 137 while (sdi12.RxBufferAvailable() == 0) {
amateusz 2:e2db05bc4708 138 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 139 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 2:e2db05bc4708 140 return false;
amateusz 2:e2db05bc4708 141 }
amateusz 2:e2db05bc4708 142 }
amateusz 2:e2db05bc4708 143 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 2:e2db05bc4708 144 char buffer[bufferSize+1];
amateusz 2:e2db05bc4708 145 sdi12.getRxBuffer(buffer);
amateusz 2:e2db05bc4708 146 buffer[bufferSize] = '\0';
amateusz 2:e2db05bc4708 147 std::string response(buffer);
amateusz 2:e2db05bc4708 148
amateusz 4:11438803516c 149 // debug("parser. recv: %s\r\n", response);
amateusz 3:2847f7c543d3 150 if (response[0] == _address) {
amateusz 3:2847f7c543d3 151 // parser here
amateusz 3:2847f7c543d3 152 response = response.substr(1); // to limit repeting this operation later. i.e. extract only values e.g. +21.3-123+123
amateusz 3:2847f7c543d3 153 // the only two possible delimeters of a value
amateusz 3:2847f7c543d3 154 size_t next_start_index = response.find_first_of("-+", 0);
amateusz 3:2847f7c543d3 155 size_t next_end_index;
amateusz 3:2847f7c543d3 156 // ready, steady, parse!!
amateusz 3:2847f7c543d3 157 while(next_start_index != std::string::npos) {
amateusz 3:2847f7c543d3 158 // determine start index:
amateusz 3:2847f7c543d3 159 next_end_index = response.find_first_of("-+", next_start_index + 1); // std::substr is prepared to take std::npos
amateusz 3:2847f7c543d3 160 float value = std::atof(response.substr(next_start_index, next_end_index).c_str());
amateusz 4:11438803516c 161 // debug("parsed: %f\r\n", value);
amateusz 4:11438803516c 162 _measurement.values[valuesAlreadyRead++] = value;
amateusz 3:2847f7c543d3 163 next_start_index = response.find_first_of("-+", next_end_index);
amateusz 3:2847f7c543d3 164 }
amateusz 3:2847f7c543d3 165 }
amateusz 4:11438803516c 166 return true;
amateusz 2:e2db05bc4708 167 }
amateusz 4:11438803516c 168
amateusz 4:11438803516c 169
amateusz 0:d58ebb2bed9a 170 //
amateusz 4:11438803516c 171 const unsigned char getMeasurementCount() {
amateusz 2:e2db05bc4708 172 return _measurement.count;
amateusz 2:e2db05bc4708 173 }
amateusz 2:e2db05bc4708 174
amateusz 4:11438803516c 175 const float getMeasurementValue(char which) {
amateusz 2:e2db05bc4708 176 return _measurement.values[which];
amateusz 2:e2db05bc4708 177 }
amateusz 2:e2db05bc4708 178
amateusz 0:d58ebb2bed9a 179 void setAddress(char address) {
amateusz 0:d58ebb2bed9a 180 _address = address;
amateusz 0:d58ebb2bed9a 181 };
amateusz 0:d58ebb2bed9a 182 //
amateusz 0:d58ebb2bed9a 183 //
amateusz 0:d58ebb2bed9a 184 private:
amateusz 5:e53104570fde 185 static const int RESPONSE_TIMEOUT = 15+1; // ms
amateusz 5:e53104570fde 186 static const std::string ADDRRICES; // as in index -> indices,
amateusz 5:e53104570fde 187
amateusz 0:d58ebb2bed9a 188 SDI12 &_sdi12;
amateusz 0:d58ebb2bed9a 189 char _address;
amateusz 5:e53104570fde 190 int _measurementEventId;
amateusz 0:d58ebb2bed9a 191 Measurement_struct _measurement;
amateusz 0:d58ebb2bed9a 192
amateusz 2:e2db05bc4708 193 EventQueue sensorQueue;
amateusz 2:e2db05bc4708 194
amateusz 1:6b1a21925a81 195 bool getIdentification(Identification_struct &ident) {
amateusz 1:6b1a21925a81 196 // _sdi12.sendCommand(std::string(_address) + "I!");
amateusz 1:6b1a21925a81 197 std::string question = "?I!";
amateusz 1:6b1a21925a81 198 question[0] = _address;
amateusz 1:6b1a21925a81 199 _sdi12.sendCommand(question);
amateusz 0:d58ebb2bed9a 200
amateusz 1:6b1a21925a81 201 Timer timeout;
amateusz 1:6b1a21925a81 202 timeout.start();
amateusz 1:6b1a21925a81 203 while (sdi12.RxBufferAvailable() == 0) {
amateusz 1:6b1a21925a81 204 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 205 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 1:6b1a21925a81 206 return false;
amateusz 1:6b1a21925a81 207 }
amateusz 1:6b1a21925a81 208 }
amateusz 1:6b1a21925a81 209 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 1:6b1a21925a81 210 char buffer[bufferSize+1];
amateusz 1:6b1a21925a81 211 sdi12.getRxBuffer(buffer);
amateusz 1:6b1a21925a81 212 buffer[bufferSize] = '\0';
amateusz 1:6b1a21925a81 213 std::string response(buffer);
amateusz 0:d58ebb2bed9a 214
amateusz 1:6b1a21925a81 215 if (response[0] == _address) {
amateusz 1:6b1a21925a81 216 // e.g.: 113DECAGON GS3 402
amateusz 2:e2db05bc4708 217
amateusz 1:6b1a21925a81 218 ident.sdi_version = std::atoi(response.substr(1, 2).c_str());
amateusz 1:6b1a21925a81 219 std::string tempStr = response.substr(3, 8);
amateusz 1:6b1a21925a81 220 strcpy(ident.company, tempStr.c_str());
amateusz 1:6b1a21925a81 221
amateusz 1:6b1a21925a81 222 tempStr = response.substr(3+8, 6);
amateusz 1:6b1a21925a81 223 strcpy(ident.model, tempStr.c_str());
amateusz 1:6b1a21925a81 224
amateusz 1:6b1a21925a81 225 tempStr = response.substr(3+8+6, 3);
amateusz 1:6b1a21925a81 226 strcpy(ident.version, tempStr.c_str());
amateusz 1:6b1a21925a81 227 return true;
amateusz 0:d58ebb2bed9a 228 }
amateusz 1:6b1a21925a81 229 return false;
amateusz 1:6b1a21925a81 230 }
amateusz 0:d58ebb2bed9a 231
amateusz 5:e53104570fde 232 };
amateusz 5:e53104570fde 233
amateusz 5:e53104570fde 234 const std::string SDI12_device::ADDRRICES = "0123456789abcdefgijklmnoprstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ";