mDot / Mbed OS Honneywell_Dust_Simple

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Main.cpp@5:7cabc36d4352, 2017-08-09 (annotated)

Committer:
Roietronics
Date:
Wed Aug 09 07:29:26 2017 +0000
Revision:
5:7cabc36d4352
Parent:
4:12dfd9a8ee76
Child:
6:6aa9d16e27bc
Version 1.2

; Fixed exit test bus in readBUffer and writeBuffer function

; Fixed Bug in checksum calculations

; Remove sensor command response tests - sensor is not sending responses

; Added Board type conditionals for serial port pin definitions

; Replce

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Roietronics 1:8cad8f7852d4 1 /* Run Honeywell Dust Sensor in continous Sampling Mode on a mDot
Roietronics 3:1ba96949e2fd 2 Version 1.1
Roietronics 0:8326629a1b97 3 Steve Mylroie Roitronic August 1st 2017
Roietronics 0:8326629a1b97 4 @C Copyright Global Quality Corp
Roietronics 0:8326629a1b97 5 */
Roietronics 0:8326629a1b97 6
Roietronics 0:8326629a1b97 7 #include "mbed.h"
Roietronics 0:8326629a1b97 8 #include "stdlib.h"
Roietronics 0:8326629a1b97 9
Roietronics 4:12dfd9a8ee76 10 #define VERSION "1.2"
Roietronics 4:12dfd9a8ee76 11
Roietronics 0:8326629a1b97 12 #define TRACE_MODE
Roietronics 0:8326629a1b97 13
Roietronics 0:8326629a1b97 14 //Turn on trace logging to the PC USB port
Roietronics 0:8326629a1b97 15 #ifdef TRACE_MODE
Roietronics 0:8326629a1b97 16 //Log level need to be set one level higher than the high level to be output
Roietronics 5:7cabc36d4352 17 #define LOG_LEVEL 2
Roietronics 0:8326629a1b97 18 #define DEBUG
Roietronics 0:8326629a1b97 19 #endif
Roietronics 0:8326629a1b97 20
Roietronics 3:1ba96949e2fd 21
Roietronics 0:8326629a1b97 22 const uint8_t* measureCommand = "68014057";
Roietronics 0:8326629a1b97 23 const uint8_t* stopCommand = "68012077";
Roietronics 0:8326629a1b97 24
Roietronics 5:7cabc36d4352 25 //Sensor command response codes
Roietronics 0:8326629a1b97 26 #define OK 0xA5A5
Roietronics 0:8326629a1b97 27 #define BAD 0x9696
Roietronics 0:8326629a1b97 28
Roietronics 5:7cabc36d4352 29 //Auto Mode measurement response lenght
Roietronics 0:8326629a1b97 30 #define MESSAGE_LEN 32
Roietronics 5:7cabc36d4352 31
Roietronics 0:8326629a1b97 32 //sensor measurement cycle in millseconds
Roietronics 0:8326629a1b97 33 #define MEASURE_DELAY 1500
Roietronics 0:8326629a1b97 34
Roietronics 3:1ba96949e2fd 35 Serial pc(USBTX, USBRX, 115200);
Roietronics 3:1ba96949e2fd 36
Roietronics 0:8326629a1b97 37 //Use USB debug pott for the debug stream
Roietronics 0:8326629a1b97 38 #ifdef DEBUG
Roietronics 3:1ba96949e2fd 39 uint32_t debugLevel = LOG_LEVEL;
Roietronics 3:1ba96949e2fd 40 #else
Roietronics 3:1ba96949e2fd 41 uint32_t debugLevel = 0;
Roietronics 0:8326629a1b97 42 #endif
Roietronics 0:8326629a1b97 43
Roietronics 3:1ba96949e2fd 44 void logInfo(char* text) {
Roietronics 3:1ba96949e2fd 45 if ( debugLevel > 0 ) {
Roietronics 3:1ba96949e2fd 46 pc.printf("\n%s\n", text );
Roietronics 3:1ba96949e2fd 47 }
Roietronics 3:1ba96949e2fd 48 return;
Roietronics 5:7cabc36d4352 49 }
Roietronics 3:1ba96949e2fd 50
Roietronics 3:1ba96949e2fd 51 void logTrace(uint8_t data) {
Roietronics 3:1ba96949e2fd 52 if (debugLevel > 2 ){ pc.putc( data );
Roietronics 3:1ba96949e2fd 53 }
Roietronics 3:1ba96949e2fd 54 return;
Roietronics 3:1ba96949e2fd 55 }
Roietronics 3:1ba96949e2fd 56
Roietronics 5:7cabc36d4352 57 //Board specfic serial port pin definitions
Roietronics 3:1ba96949e2fd 58
Roietronics 5:7cabc36d4352 59 #ifdef TARGET_Freescale //Freedom Board
Roietronics 5:7cabc36d4352 60
Roietronics 5:7cabc36d4352 61 #define SENSOR_XMT D1
Roietronics 5:7cabc36d4352 62 #define SENSOR_RCV D0
Roietronics 5:7cabc36d4352 63
Roietronics 5:7cabc36d4352 64 #endif
Roietronics 5:7cabc36d4352 65
Roietronics 5:7cabc36d4352 66 #ifdef TARGET_MTS_MDOT_F411RE //Multi Tech mDot
Roietronics 5:7cabc36d4352 67
Roietronics 5:7cabc36d4352 68 #define SENSOR_XMT PA_2
Roietronics 5:7cabc36d4352 69 #define SENSOR_RCV PA_3
Roietronics 5:7cabc36d4352 70
Roietronics 5:7cabc36d4352 71 #endif
Roietronics 5:7cabc36d4352 72
Roietronics 5:7cabc36d4352 73 //Use a boards second UART to communicate witb the Honneywell sensor
Roietronics 0:8326629a1b97 74 //Default UART setting are 8,N,1
Roietronics 5:7cabc36d4352 75 Serial sensor( SENSOR_XMT, SENSOR_RCV, 9600);
Roietronics 0:8326629a1b97 76
Roietronics 0:8326629a1b97 77 Timer t;
Roietronics 0:8326629a1b97 78
Roietronics 3:1ba96949e2fd 79
Roietronics 0:8326629a1b97 80 //synchrnous serial read and writes
Roietronics 0:8326629a1b97 81 //Mbed 5 Serial class only supports single character read and writes or
Roietronics 0:8326629a1b97 82 // async buffer reads abd wrutes
Roietronics 0:8326629a1b97 83 void readBuffer(uint8_t* buffer, uint16_t count)
Roietronics 0:8326629a1b97 84 {
Roietronics 5:7cabc36d4352 85 logInfo( "Receiving Data from sensor\n");
Roietronics 0:8326629a1b97 86 uint8_t* pointer = buffer;
Roietronics 0:8326629a1b97 87 uint16_t counter = count;
Roietronics 0:8326629a1b97 88 while(1)
Roietronics 0:8326629a1b97 89 {
Roietronics 0:8326629a1b97 90 if(sensor.readable())
Roietronics 0:8326629a1b97 91 {
Roietronics 0:8326629a1b97 92 *pointer++ = sensor.getc();
Roietronics 3:1ba96949e2fd 93 logTrace(*pointer);
Roietronics 0:8326629a1b97 94 counter--;
Roietronics 0:8326629a1b97 95 }
Roietronics 4:12dfd9a8ee76 96 if(counter == 0) {
Roietronics 0:8326629a1b97 97 return;
Roietronics 0:8326629a1b97 98 }
Roietronics 0:8326629a1b97 99 }
Roietronics 0:8326629a1b97 100 }
Roietronics 0:8326629a1b97 101
Roietronics 0:8326629a1b97 102 void writeBuffer(const uint8_t* buffer, uint16_t count)
Roietronics 0:8326629a1b97 103 {
Roietronics 5:7cabc36d4352 104 logInfo( "Sending Data to sensor\n");
Roietronics 0:8326629a1b97 105 uint8_t* pointer = (uint8_t*)buffer;
Roietronics 0:8326629a1b97 106 uint16_t counter = count;
Roietronics 0:8326629a1b97 107 while(1)
Roietronics 0:8326629a1b97 108 {
Roietronics 0:8326629a1b97 109 if(sensor.writeable())
Roietronics 0:8326629a1b97 110 {
Roietronics 3:1ba96949e2fd 111 logTrace(*pointer);
Roietronics 0:8326629a1b97 112 sensor.putc(*pointer++);
Roietronics 0:8326629a1b97 113 counter--;
Roietronics 0:8326629a1b97 114 }
Roietronics 4:12dfd9a8ee76 115 if(counter == 0) {
Roietronics 0:8326629a1b97 116 return;
Roietronics 0:8326629a1b97 117 }
Roietronics 0:8326629a1b97 118 }
Roietronics 0:8326629a1b97 119 }
Roietronics 0:8326629a1b97 120
Roietronics 4:12dfd9a8ee76 121 //Validate the received mesurements checksum
Roietronics 0:8326629a1b97 122
Roietronics 0:8326629a1b97 123 bool checkValue(uint8_t *thebuf, uint8_t leng)
Roietronics 0:8326629a1b97 124 {
Roietronics 0:8326629a1b97 125 bool receiveflag = false;
Roietronics 0:8326629a1b97 126 uint16_t receiveSum=0;
Roietronics 0:8326629a1b97 127
Roietronics 5:7cabc36d4352 128 for(int i=0; i<(leng-1); i++){
Roietronics 0:8326629a1b97 129 receiveSum=receiveSum+thebuf[i];
Roietronics 0:8326629a1b97 130 }
Roietronics 0:8326629a1b97 131 receiveSum=receiveSum + 0x42;
Roietronics 0:8326629a1b97 132
Roietronics 0:8326629a1b97 133 if(receiveSum == ((thebuf[leng-2]<<8)+thebuf[leng-1])) //check the debug data
Roietronics 0:8326629a1b97 134 {
Roietronics 0:8326629a1b97 135 receiveSum = 0;
Roietronics 0:8326629a1b97 136 receiveflag = true;
Roietronics 0:8326629a1b97 137 }
Roietronics 0:8326629a1b97 138 return receiveflag;
Roietronics 0:8326629a1b97 139 }
Roietronics 0:8326629a1b97 140
Roietronics 0:8326629a1b97 141 //Extract the 1 micron particle count from the messaage
Roietronics 0:8326629a1b97 142 uint16_t transmitPM01(uint8_t *thebuf)
Roietronics 0:8326629a1b97 143 {
Roietronics 0:8326629a1b97 144 uint16_t PM01Val;
Roietronics 0:8326629a1b97 145 PM01Val=((thebuf[3]<<8) + thebuf[4]); //count PM1.0 value of the air detector module
Roietronics 0:8326629a1b97 146 return PM01Val;
Roietronics 0:8326629a1b97 147 }
Roietronics 0:8326629a1b97 148
Roietronics 0:8326629a1b97 149 //Extract the 2.5 micron particle count from the messaage
Roietronics 0:8326629a1b97 150 uint16_t transmitPM2_5(uint8_t *thebuf)
Roietronics 0:8326629a1b97 151 {
Roietronics 0:8326629a1b97 152 uint16_t PM2_5Val;
Roietronics 0:8326629a1b97 153 PM2_5Val=((thebuf[5]<<8) + thebuf[6]);//count PM2.5 value of the air detector module
Roietronics 0:8326629a1b97 154 return PM2_5Val;
Roietronics 0:8326629a1b97 155 }
Roietronics 0:8326629a1b97 156
Roietronics 0:8326629a1b97 157 //Extract the 10 micron particle count from the messaage
Roietronics 0:8326629a1b97 158 uint16_t transmitPM10(uint8_t *thebuf)
Roietronics 0:8326629a1b97 159 {
Roietronics 0:8326629a1b97 160 uint16_t PM10Val;
Roietronics 0:8326629a1b97 161 PM10Val=((thebuf[7]<<8) + thebuf[8]); //count PM10 value of the air detector module
Roietronics 0:8326629a1b97 162 return PM10Val;
Roietronics 0:8326629a1b97 163 }
Roietronics 0:8326629a1b97 164
Roietronics 0:8326629a1b97 165 int main()
Roietronics 0:8326629a1b97 166 {
Roietronics 5:7cabc36d4352 167 uint8_t dataBuffer[MESSAGE_LEN];
Roietronics 0:8326629a1b97 168 uint16_t response;
Roietronics 0:8326629a1b97 169 uint16_t PM01Value=0; //define PM1.0 value of the air detector module
Roietronics 0:8326629a1b97 170 uint16_t PM2_5Value=0; //define PM2.5 value of the air detector module
Roietronics 0:8326629a1b97 171 uint16_t PM10Value=0; //define PM10 value of the air detector module
Roietronics 4:12dfd9a8ee76 172
Roietronics 5:7cabc36d4352 173 pc.printf("Starting Honeywell Dust Sesor App version %s/n", VERSION);
Roietronics 0:8326629a1b97 174
Roietronics 0:8326629a1b97 175 //Send start command to the sensor
Roietronics 0:8326629a1b97 176 writeBuffer(measureCommand, 4);
Roietronics 5:7cabc36d4352 177 /*
Roietronics 5:7cabc36d4352 178 Not geting response from sensor - first characters received are measurement data
Roietronics 0:8326629a1b97 179 //Wait for sensors response
Roietronics 0:8326629a1b97 180 //while(!sensor.readable());
Roietronics 0:8326629a1b97 181 readBuffer(dataBuffer, 2);
Roietronics 0:8326629a1b97 182 response = dataBuffer[0] << 8 || dataBuffer[1];
Roietronics 0:8326629a1b97 183
Roietronics 0:8326629a1b97 184 switch(response) {
Roietronics 0:8326629a1b97 185 case OK:
Roietronics 0:8326629a1b97 186 logInfo("Sensor Auto Measurement Started");
Roietronics 0:8326629a1b97 187 break;
Roietronics 0:8326629a1b97 188 case BAD:
Roietronics 0:8326629a1b97 189 logInfo("Sensor rejected Start Measurement Commmand");
Roietronics 0:8326629a1b97 190 return -1;
Roietronics 0:8326629a1b97 191 default:
Roietronics 0:8326629a1b97 192 logInfo("Communication Error: Invalid Sensor Response");
Roietronics 0:8326629a1b97 193 return -2;
Roietronics 0:8326629a1b97 194 }
Roietronics 5:7cabc36d4352 195 */
Roietronics 0:8326629a1b97 196 t.start();
Roietronics 4:12dfd9a8ee76 197
Roietronics 0:8326629a1b97 198 //Start continous loop
Roietronics 5:7cabc36d4352 199 while(1)
Roietronics 0:8326629a1b97 200 {
Roietronics 0:8326629a1b97 201 if(sensor.getc() == 0x42){ //start to read when detect 0x42
Roietronics 0:8326629a1b97 202 readBuffer(dataBuffer,MESSAGE_LEN -1);
Roietronics 0:8326629a1b97 203
Roietronics 0:8326629a1b97 204 if(dataBuffer[0] == 0x4d){
Roietronics 4:12dfd9a8ee76 205 if(checkValue(dataBuffer,MESSAGE_LEN-1)){
Roietronics 0:8326629a1b97 206 PM01Value=transmitPM01(dataBuffer); //count PM1.0 value of the air detector module
Roietronics 0:8326629a1b97 207 PM2_5Value=transmitPM2_5(dataBuffer);//count PM2.5 value of the air detector module
Roietronics 0:8326629a1b97 208 PM10Value=transmitPM10(dataBuffer); //count PM10 value of the air detector module
Roietronics 0:8326629a1b97 209 }
Roietronics 0:8326629a1b97 210 }
Roietronics 0:8326629a1b97 211 }
Roietronics 5:7cabc36d4352 212 //Check for exit request
Roietronics 5:7cabc36d4352 213 if(pc.readable()) {
Roietronics 5:7cabc36d4352 214 char input = pc.getc();
Roietronics 5:7cabc36d4352 215 if(input == 'Q' || input == 'q')
Roietronics 5:7cabc36d4352 216 {
Roietronics 5:7cabc36d4352 217 t.stop();
Roietronics 5:7cabc36d4352 218 writeBuffer(stopCommand, 4);
Roietronics 5:7cabc36d4352 219 pc.printf("Exit request received\n");
Roietronics 5:7cabc36d4352 220 return 0;
Roietronics 5:7cabc36d4352 221 }
Roietronics 0:8326629a1b97 222 }
Roietronics 5:7cabc36d4352 223 /* Use MBed wait function instead of Arduino delay loop
Roietronics 0:8326629a1b97 224 static unsigned long OledTimer= t.read_ms();
Roietronics 0:8326629a1b97 225 if (t.read_ms() - OledTimer >=1000)
Roietronics 0:8326629a1b97 226 {
Roietronics 0:8326629a1b97 227 OledTimer= t.read_ms();
Roietronics 5:7cabc36d4352 228 */
Roietronics 5:7cabc36d4352 229 wait_ms(1000);
Roietronics 0:8326629a1b97 230
Roietronics 5:7cabc36d4352 231 pc.printf("PM1.0: %d ug/m3", PM01Value);
Roietronics 0:8326629a1b97 232 // debug.print(PM01Value);
Roietronics 0:8326629a1b97 233 // debug.println(" ug/m3");
Roietronics 0:8326629a1b97 234
Roietronics 5:7cabc36d4352 235 pc.printf("PM2.5: %d ug/m3", PM2_5Value);
Roietronics 0:8326629a1b97 236 // debug.print(PM2_5Value);
Roietronics 0:8326629a1b97 237 // debug.println(" ug/m3");
Roietronics 0:8326629a1b97 238
Roietronics 5:7cabc36d4352 239 pc.printf("PM10: %d ug/m3", PM10Value);
Roietronics 0:8326629a1b97 240 // debug.print(PM10Value);
Roietronics 0:8326629a1b97 241 // debug.println(" ug/m3");
Roietronics 5:7cabc36d4352 242 pc.printf("\n");
Roietronics 0:8326629a1b97 243
Roietronics 5:7cabc36d4352 244 // }
Roietronics 0:8326629a1b97 245 }
Roietronics 0:8326629a1b97 246 }