Mateusz Grzywacz / SDI12_device

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SDI12_device.h@9:a3062b9e4324, 2018-08-01 (annotated)

Committer:
amateusz
Date:
Wed Aug 01 18:13:52 2018 +0000
Revision:
9:a3062b9e4324
Parent:
8:1beed160ed13
Child:
10:efd1e313fe8c
stuff

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 9:a3062b9e4324 25 static int detect(SDI12 &sdi12, char indices[], int limit = -1){
amateusz 0:d58ebb2bed9a 26 char found = 0;
amateusz 9:a3062b9e4324 27 for (size_t i = 0; i < (limit==-1?ADDRRICES.size():limit); ++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 8:1beed160ed13 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 7:1f506c65c4e8 44 indices[found++] = buffer[0];
amateusz 8:1beed160ed13 45 // debug("FOUND: %d -> %c\r\n", i, indices[found-1]);
amateusz 7:1f506c65c4e8 46 }
amateusz 7:1f506c65c4e8 47 }
amateusz 0:d58ebb2bed9a 48 }
amateusz 0:d58ebb2bed9a 49 }
amateusz 0:d58ebb2bed9a 50 return found;
amateusz 0:d58ebb2bed9a 51 };
amateusz 0:d58ebb2bed9a 52
amateusz 9:a3062b9e4324 53 SDI12_device (SDI12 &inst, char address, EventQueue &mainDispatcher) : _sdi12(inst),sensorQueue(4*EVENTS_QUEUE_SIZE){
amateusz 0:d58ebb2bed9a 54 setAddress(address);
amateusz 2:e2db05bc4708 55 sensorQueue.chain(&mainDispatcher);
amateusz 1:6b1a21925a81 56 if(getIdentification(_ident_struct));
amateusz 0:d58ebb2bed9a 57 };
amateusz 9:a3062b9e4324 58 //~SDI12_device () {
amateusz 9:a3062b9e4324 59 // // unchain event queue
amateusz 9:a3062b9e4324 60 // sensorQueue.cancel(_measurementEventId);
amateusz 9:a3062b9e4324 61 // sensorQueue.chain(NULL);
amateusz 9:a3062b9e4324 62 // }
amateusz 0:d58ebb2bed9a 63
amateusz 2:e2db05bc4708 64
amateusz 0:d58ebb2bed9a 65 // // returns after how many seconds a measurement will be ready
amateusz 2:e2db05bc4708 66 int measure(bool concurrent = true) {
amateusz 4:11438803516c 67
amateusz 2:e2db05bc4708 68 std::string question = string("?") + string(concurrent?"C":"M") + string("!");
amateusz 2:e2db05bc4708 69 question[0] = _address;
amateusz 2:e2db05bc4708 70 _sdi12.sendCommand(question);
amateusz 2:e2db05bc4708 71
amateusz 2:e2db05bc4708 72 Timer timeout;
amateusz 2:e2db05bc4708 73 timeout.start();
amateusz 2:e2db05bc4708 74 while (sdi12.RxBufferAvailable() == 0) {
amateusz 2:e2db05bc4708 75 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 76 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 2:e2db05bc4708 77 return false;
amateusz 2:e2db05bc4708 78 }
amateusz 2:e2db05bc4708 79 }
amateusz 9:a3062b9e4324 80
amateusz 2:e2db05bc4708 81 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 2:e2db05bc4708 82 char buffer[bufferSize+1];
amateusz 2:e2db05bc4708 83 sdi12.getRxBuffer(buffer);
amateusz 2:e2db05bc4708 84 buffer[bufferSize] = '\0';
amateusz 2:e2db05bc4708 85 std::string response(buffer);
amateusz 2:e2db05bc4708 86
amateusz 2:e2db05bc4708 87 if (response[0] == _address) {
amateusz 2:e2db05bc4708 88 char measurementsCount = std::atoi(response.substr(1+3,(concurrent?2:1)).c_str());
amateusz 2:e2db05bc4708 89 char waitFor = std::atoi(response.substr(1,3).c_str());
amateusz 2:e2db05bc4708 90 _measurement.count = measurementsCount;
amateusz 4:11438803516c 91 _measurement.readyIn = waitFor;
amateusz 2:e2db05bc4708 92 // _measurement.timestampMeasurementReadyAt
amateusz 2:e2db05bc4708 93 debug("wait for %d measurement for %d seconds...", _measurement.count, waitFor);
amateusz 5:e53104570fde 94 _measurementEventId = sensorQueue.call_in(waitFor * 1000, callback(this, &SDI12_device::read));
amateusz 9:a3062b9e4324 95 // debug("measurement scheduled");
amateusz 4:11438803516c 96 // if (_measurement.values != NULL) delete[] _measurement.values;
amateusz 4:11438803516c 97 // _measurement.values = new float[measurementsCount];
amateusz 2:e2db05bc4708 98 return 0;
amateusz 2:e2db05bc4708 99 }
amateusz 2:e2db05bc4708 100 return -1;
amateusz 2:e2db05bc4708 101 };
amateusz 0:d58ebb2bed9a 102 //
amateusz 0:d58ebb2bed9a 103 // bool isMeasurementReady(){
amateusz 0:d58ebb2bed9a 104 // return (((unsigned)(_measurement.timestampMeasurementReadyAt - millis())>0)?false:true);
amateusz 0:d58ebb2bed9a 105 // };
amateusz 0:d58ebb2bed9a 106 //
amateusz 0:d58ebb2bed9a 107 // short unsigned int measurementReadyIn(){ // ms
amateusz 0:d58ebb2bed9a 108 // if (isMeasurementReady())
amateusz 0:d58ebb2bed9a 109 // return 0;
amateusz 0:d58ebb2bed9a 110 // else{
amateusz 0:d58ebb2bed9a 111 // return _measurement.timestampMeasurementReadyAt - millis();
amateusz 0:d58ebb2bed9a 112 // }
amateusz 0:d58ebb2bed9a 113 // };
amateusz 0:d58ebb2bed9a 114 //
amateusz 4:11438803516c 115 char readyIn() {
amateusz 4:11438803516c 116 return _measurement.readyIn;
amateusz 4:11438803516c 117 }
amateusz 4:11438803516c 118
amateusz 2:e2db05bc4708 119 bool read() {
amateusz 3:2847f7c543d3 120 char valuesAlreadyRead = 0;
amateusz 2:e2db05bc4708 121 std::string question = string("?") + string("D0") + string("!");
amateusz 2:e2db05bc4708 122 question[0] = _address;
amateusz 2:e2db05bc4708 123 _sdi12.sendCommand(question);
amateusz 2:e2db05bc4708 124
amateusz 2:e2db05bc4708 125 Timer timeout;
amateusz 2:e2db05bc4708 126 timeout.start();
amateusz 2:e2db05bc4708 127 while (sdi12.RxBufferAvailable() == 0) {
amateusz 2:e2db05bc4708 128 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 129 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 2:e2db05bc4708 130 return false;
amateusz 2:e2db05bc4708 131 }
amateusz 2:e2db05bc4708 132 }
amateusz 2:e2db05bc4708 133 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 2:e2db05bc4708 134 char buffer[bufferSize+1];
amateusz 2:e2db05bc4708 135 sdi12.getRxBuffer(buffer);
amateusz 2:e2db05bc4708 136 buffer[bufferSize] = '\0';
amateusz 2:e2db05bc4708 137 std::string response(buffer);
amateusz 2:e2db05bc4708 138
amateusz 4:11438803516c 139 // debug("parser. recv: %s\r\n", response);
amateusz 3:2847f7c543d3 140 if (response[0] == _address) {
amateusz 3:2847f7c543d3 141 // parser here
amateusz 3:2847f7c543d3 142 response = response.substr(1); // to limit repeting this operation later. i.e. extract only values e.g. +21.3-123+123
amateusz 3:2847f7c543d3 143 // the only two possible delimeters of a value
amateusz 3:2847f7c543d3 144 size_t next_start_index = response.find_first_of("-+", 0);
amateusz 3:2847f7c543d3 145 size_t next_end_index;
amateusz 3:2847f7c543d3 146 // ready, steady, parse!!
amateusz 3:2847f7c543d3 147 while(next_start_index != std::string::npos) {
amateusz 3:2847f7c543d3 148 // determine start index:
amateusz 3:2847f7c543d3 149 next_end_index = response.find_first_of("-+", next_start_index + 1); // std::substr is prepared to take std::npos
amateusz 3:2847f7c543d3 150 float value = std::atof(response.substr(next_start_index, next_end_index).c_str());
amateusz 4:11438803516c 151 // debug("parsed: %f\r\n", value);
amateusz 4:11438803516c 152 _measurement.values[valuesAlreadyRead++] = value;
amateusz 3:2847f7c543d3 153 next_start_index = response.find_first_of("-+", next_end_index);
amateusz 3:2847f7c543d3 154 }
amateusz 3:2847f7c543d3 155 }
amateusz 4:11438803516c 156 return true;
amateusz 2:e2db05bc4708 157 }
amateusz 4:11438803516c 158
amateusz 4:11438803516c 159
amateusz 0:d58ebb2bed9a 160 //
amateusz 4:11438803516c 161 const unsigned char getMeasurementCount() {
amateusz 2:e2db05bc4708 162 return _measurement.count;
amateusz 2:e2db05bc4708 163 }
amateusz 2:e2db05bc4708 164
amateusz 4:11438803516c 165 const float getMeasurementValue(char which) {
amateusz 2:e2db05bc4708 166 return _measurement.values[which];
amateusz 2:e2db05bc4708 167 }
amateusz 2:e2db05bc4708 168
amateusz 0:d58ebb2bed9a 169 void setAddress(char address) {
amateusz 0:d58ebb2bed9a 170 _address = address;
amateusz 0:d58ebb2bed9a 171 };
amateusz 0:d58ebb2bed9a 172 //
amateusz 0:d58ebb2bed9a 173 //
amateusz 0:d58ebb2bed9a 174 private:
amateusz 5:e53104570fde 175 static const int RESPONSE_TIMEOUT = 15+1; // ms
amateusz 5:e53104570fde 176 static const std::string ADDRRICES; // as in index -> indices,
amateusz 5:e53104570fde 177
amateusz 0:d58ebb2bed9a 178 SDI12 &_sdi12;
amateusz 0:d58ebb2bed9a 179 char _address;
amateusz 5:e53104570fde 180 int _measurementEventId;
amateusz 0:d58ebb2bed9a 181 Measurement_struct _measurement;
amateusz 0:d58ebb2bed9a 182
amateusz 2:e2db05bc4708 183 EventQueue sensorQueue;
amateusz 2:e2db05bc4708 184
amateusz 1:6b1a21925a81 185 bool getIdentification(Identification_struct &ident) {
amateusz 1:6b1a21925a81 186 // _sdi12.sendCommand(std::string(_address) + "I!");
amateusz 1:6b1a21925a81 187 std::string question = "?I!";
amateusz 1:6b1a21925a81 188 question[0] = _address;
amateusz 1:6b1a21925a81 189 _sdi12.sendCommand(question);
amateusz 0:d58ebb2bed9a 190
amateusz 1:6b1a21925a81 191 Timer timeout;
amateusz 1:6b1a21925a81 192 timeout.start();
amateusz 1:6b1a21925a81 193 while (sdi12.RxBufferAvailable() == 0) {
amateusz 1:6b1a21925a81 194 if (sdi12.RxInProgress()) timeout.reset();
amateusz 5:e53104570fde 195 if(timeout.read_ms() > RESPONSE_TIMEOUT) {
amateusz 1:6b1a21925a81 196 return false;
amateusz 1:6b1a21925a81 197 }
amateusz 1:6b1a21925a81 198 }
amateusz 1:6b1a21925a81 199 unsigned char bufferSize = sdi12.RxBufferAvailable();
amateusz 1:6b1a21925a81 200 char buffer[bufferSize+1];
amateusz 1:6b1a21925a81 201 sdi12.getRxBuffer(buffer);
amateusz 1:6b1a21925a81 202 buffer[bufferSize] = '\0';
amateusz 1:6b1a21925a81 203 std::string response(buffer);
amateusz 0:d58ebb2bed9a 204
amateusz 1:6b1a21925a81 205 if (response[0] == _address) {
amateusz 1:6b1a21925a81 206 // e.g.: 113DECAGON GS3 402
amateusz 2:e2db05bc4708 207
amateusz 1:6b1a21925a81 208 ident.sdi_version = std::atoi(response.substr(1, 2).c_str());
amateusz 1:6b1a21925a81 209 std::string tempStr = response.substr(3, 8);
amateusz 1:6b1a21925a81 210 strcpy(ident.company, tempStr.c_str());
amateusz 1:6b1a21925a81 211
amateusz 1:6b1a21925a81 212 tempStr = response.substr(3+8, 6);
amateusz 1:6b1a21925a81 213 strcpy(ident.model, tempStr.c_str());
amateusz 1:6b1a21925a81 214
amateusz 1:6b1a21925a81 215 tempStr = response.substr(3+8+6, 3);
amateusz 1:6b1a21925a81 216 strcpy(ident.version, tempStr.c_str());
amateusz 1:6b1a21925a81 217 return true;
amateusz 0:d58ebb2bed9a 218 }
amateusz 1:6b1a21925a81 219 return false;
amateusz 1:6b1a21925a81 220 }
amateusz 0:d58ebb2bed9a 221
amateusz 5:e53104570fde 222 };
amateusz 5:e53104570fde 223
amateusz 5:e53104570fde 224 const std::string SDI12_device::ADDRRICES = "0123456789abcdefgijklmnoprstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ";