Stephen McGarry
A copy of very incomplete program for forum
Dependencies: mbed SDFileSystem
main.cpp@0:bfcb5b67b1d6, 2012-03-17 (annotated)
- Committer:
- roselea
- Date:
- Sat Mar 17 14:15:20 2012 +0000
- Revision:
- 0:bfcb5b67b1d6
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| roselea | 0:bfcb5b67b1d6 | 1 | /* |
| roselea | 0:bfcb5b67b1d6 | 2 | * |
| roselea | 0:bfcb5b67b1d6 | 3 | */ |
| roselea | 0:bfcb5b67b1d6 | 4 | |
| roselea | 0:bfcb5b67b1d6 | 5 | //////////////////////////////////////////////////////////////////// |
| roselea | 0:bfcb5b67b1d6 | 6 | // Test code to read temperature from a Maxim DS18B20 or DS18S20 |
| roselea | 0:bfcb5b67b1d6 | 7 | // 1-wire device |
| roselea | 0:bfcb5b67b1d6 | 8 | //////////////////////////////////////////////////////////////////// |
| roselea | 0:bfcb5b67b1d6 | 9 | |
| roselea | 0:bfcb5b67b1d6 | 10 | #include <mbed.h> |
| roselea | 0:bfcb5b67b1d6 | 11 | #include "DebugTrace.h" |
| roselea | 0:bfcb5b67b1d6 | 12 | #include "DS18B20.h" |
| roselea | 0:bfcb5b67b1d6 | 13 | #include "OneWireDefs.h" |
| roselea | 0:bfcb5b67b1d6 | 14 | #include "SDFileSystem.h" |
| roselea | 0:bfcb5b67b1d6 | 15 | |
| roselea | 0:bfcb5b67b1d6 | 16 | DebugTrace trace(ON, TO_SERIAL); |
| roselea | 0:bfcb5b67b1d6 | 17 | SDFileSystem *poSD; |
| roselea | 0:bfcb5b67b1d6 | 18 | bool bSDfs_active=false; |
| roselea | 0:bfcb5b67b1d6 | 19 | DigitalIn oSDCardPresent(p15); |
| roselea | 0:bfcb5b67b1d6 | 20 | |
| roselea | 0:bfcb5b67b1d6 | 21 | const int NUM_THERMS=5; // set of themometers |
| roselea | 0:bfcb5b67b1d6 | 22 | const int SAMPLE_SIZE=5; // how many readings to average over |
| roselea | 0:bfcb5b67b1d6 | 23 | #define ReturnAir 0 |
| roselea | 0:bfcb5b67b1d6 | 24 | #define WasteAir 1 |
| roselea | 0:bfcb5b67b1d6 | 25 | #define FreshAir 2 |
| roselea | 0:bfcb5b67b1d6 | 26 | #define MixedAir 3 |
| roselea | 0:bfcb5b67b1d6 | 27 | #define HeatedAir 4 |
| roselea | 0:bfcb5b67b1d6 | 28 | DS18B20 oThermos[NUM_THERMS]={DS18B20(true, false, false, p16),DS18B20(true, false, false, p17),DS18B20(true, false, false, p18),DS18B20(true, false, false, p19),DS18B20(true, false, false, p20)}; |
| roselea | 0:bfcb5b67b1d6 | 29 | float fTemps[NUM_THERMS][SAMPLE_SIZE+1]; //average and the last SAMPLE_SIZE readings |
| roselea | 0:bfcb5b67b1d6 | 30 | int iCurrentSample; |
| roselea | 0:bfcb5b67b1d6 | 31 | |
| roselea | 0:bfcb5b67b1d6 | 32 | DigitalOut oPump(p23); |
| roselea | 0:bfcb5b67b1d6 | 33 | typedef enum {Cooling,Neutral,Heating} tState; |
| roselea | 0:bfcb5b67b1d6 | 34 | tState eState=Neutral; //main system state |
| roselea | 0:bfcb5b67b1d6 | 35 | int iSubState=0; |
| roselea | 0:bfcb5b67b1d6 | 36 | int iHeatingStates,iCoolingStates,iCoolingStep,iCoolingValue; |
| roselea | 0:bfcb5b67b1d6 | 37 | float fHeatingStep,fHeatingValue; |
| roselea | 0:bfcb5b67b1d6 | 38 | |
| roselea | 0:bfcb5b67b1d6 | 39 | DigitalOut oLedPump(LED1); |
| roselea | 0:bfcb5b67b1d6 | 40 | DigitalOut oLedRecirc(LED2); |
| roselea | 0:bfcb5b67b1d6 | 41 | DigitalOut oLedByp(LED3); |
| roselea | 0:bfcb5b67b1d6 | 42 | DigitalOut oLedFileOpen(LED4); |
| roselea | 0:bfcb5b67b1d6 | 43 | |
| roselea | 0:bfcb5b67b1d6 | 44 | const int NUM_SERVOS=2; |
| roselea | 0:bfcb5b67b1d6 | 45 | #define HeatExBypass 0 |
| roselea | 0:bfcb5b67b1d6 | 46 | #define FreshAirBypass 1 |
| roselea | 0:bfcb5b67b1d6 | 47 | typedef struct { |
| roselea | 0:bfcb5b67b1d6 | 48 | int iBase,iRange,iCurrent; |
| roselea | 0:bfcb5b67b1d6 | 49 | PwmOut oOut; |
| roselea | 0:bfcb5b67b1d6 | 50 | } tServo ; |
| roselea | 0:bfcb5b67b1d6 | 51 | tServo oServos[NUM_SERVOS]={{0,0,0,PwmOut(p21)},{0,0,0,PwmOut(p22)}}; |
| roselea | 0:bfcb5b67b1d6 | 52 | int BypassState; |
| roselea | 0:bfcb5b67b1d6 | 53 | |
| roselea | 0:bfcb5b67b1d6 | 54 | float MaxHeat,SetPoint; |
| roselea | 0:bfcb5b67b1d6 | 55 | int TempFreq,LogFreq,ControlFreq; |
| roselea | 0:bfcb5b67b1d6 | 56 | |
| roselea | 0:bfcb5b67b1d6 | 57 | void read_temps(); |
| roselea | 0:bfcb5b67b1d6 | 58 | void do_controls(); |
| roselea | 0:bfcb5b67b1d6 | 59 | void adjust_pump(float current,float required); |
| roselea | 0:bfcb5b67b1d6 | 60 | void log_values(time_t now); |
| roselea | 0:bfcb5b67b1d6 | 61 | void set_servo(tServo *poServo,float fTarget); |
| roselea | 0:bfcb5b67b1d6 | 62 | |
| roselea | 0:bfcb5b67b1d6 | 63 | int main() { |
| roselea | 0:bfcb5b67b1d6 | 64 | int x; |
| roselea | 0:bfcb5b67b1d6 | 65 | time_t start,nexttemp,nextcontrol,nextlog,now; |
| roselea | 0:bfcb5b67b1d6 | 66 | printf("Roselea Air conditioning control system\n"); |
| roselea | 0:bfcb5b67b1d6 | 67 | FILE *fp; |
| roselea | 0:bfcb5b67b1d6 | 68 | |
| roselea | 0:bfcb5b67b1d6 | 69 | do { // wait for SD to be inserted hten attempt to open setting file |
| roselea | 0:bfcb5b67b1d6 | 70 | |
| roselea | 0:bfcb5b67b1d6 | 71 | if (oSDCardPresent==1) { |
| roselea | 0:bfcb5b67b1d6 | 72 | printf("Waiting for SD Card\n"); |
| roselea | 0:bfcb5b67b1d6 | 73 | while (oSDCardPresent) { //flash led while waitinf for the card |
| roselea | 0:bfcb5b67b1d6 | 74 | oLedFileOpen=!oLedFileOpen; |
| roselea | 0:bfcb5b67b1d6 | 75 | wait (0.5); |
| roselea | 0:bfcb5b67b1d6 | 76 | } |
| roselea | 0:bfcb5b67b1d6 | 77 | oLedFileOpen=0; |
| roselea | 0:bfcb5b67b1d6 | 78 | wait (0.5); //allow poSD time to stabilse |
| roselea | 0:bfcb5b67b1d6 | 79 | } |
| roselea | 0:bfcb5b67b1d6 | 80 | poSD=new SDFileSystem(p11, p12, p13, p14, "poSD"); |
| roselea | 0:bfcb5b67b1d6 | 81 | bSDfs_active=true; |
| roselea | 0:bfcb5b67b1d6 | 82 | fp = fopen("/poSD/Settings.txt", "r"); |
| roselea | 0:bfcb5b67b1d6 | 83 | if (fp == NULL) { |
| roselea | 0:bfcb5b67b1d6 | 84 | printf("Could not open file for read\nPlease insert card with Settings.txt on it\n"); |
| roselea | 0:bfcb5b67b1d6 | 85 | while (oSDCardPresent==0) { // wait for card to be removed then try again |
| roselea | 0:bfcb5b67b1d6 | 86 | oLedFileOpen=!oLedFileOpen; |
| roselea | 0:bfcb5b67b1d6 | 87 | wait (0.1); |
| roselea | 0:bfcb5b67b1d6 | 88 | } |
| roselea | 0:bfcb5b67b1d6 | 89 | delete poSD; |
| roselea | 0:bfcb5b67b1d6 | 90 | bSDfs_active=false; |
| roselea | 0:bfcb5b67b1d6 | 91 | } |
| roselea | 0:bfcb5b67b1d6 | 92 | } while (fp==NULL); |
| roselea | 0:bfcb5b67b1d6 | 93 | oLedFileOpen=1; |
| roselea | 0:bfcb5b67b1d6 | 94 | |
| roselea | 0:bfcb5b67b1d6 | 95 | struct tm t; |
| roselea | 0:bfcb5b67b1d6 | 96 | fscanf(fp, "%d %d %d %d:%d:%d",&t.tm_year,&t.tm_mon,&t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec); //read the real time |
| roselea | 0:bfcb5b67b1d6 | 97 | // convert to timestamp |
| roselea | 0:bfcb5b67b1d6 | 98 | t.tm_mon--; |
| roselea | 0:bfcb5b67b1d6 | 99 | t.tm_year=t.tm_year-1900; |
| roselea | 0:bfcb5b67b1d6 | 100 | set_time(mktime(&t)); |
| roselea | 0:bfcb5b67b1d6 | 101 | printf("Time has been set to %s\n",asctime(&t)); |
| roselea | 0:bfcb5b67b1d6 | 102 | |
| roselea | 0:bfcb5b67b1d6 | 103 | for (x=0; x<NUM_SERVOS; x++) { //initialise servos from file values |
| roselea | 0:bfcb5b67b1d6 | 104 | int l,h; |
| roselea | 0:bfcb5b67b1d6 | 105 | fscanf(fp,"%d %d",&l,&h); //read low and high values |
| roselea | 0:bfcb5b67b1d6 | 106 | oServos[x].iBase=20000-l; |
| roselea | 0:bfcb5b67b1d6 | 107 | oServos[x].iRange=(20000-h)-oServos[x].iBase; // calculate operation range |
| roselea | 0:bfcb5b67b1d6 | 108 | oServos[x].oOut.period_us(20000); |
| roselea | 0:bfcb5b67b1d6 | 109 | oServos[x].oOut.pulsewidth_us(oServos[x].iBase); |
| roselea | 0:bfcb5b67b1d6 | 110 | printf("Servo %d has base of %d and range of %d\n",x+1,oServos[x].iBase,oServos[x].iRange); |
| roselea | 0:bfcb5b67b1d6 | 111 | } |
| roselea | 0:bfcb5b67b1d6 | 112 | fscanf(fp,"%d %d %d",&TempFreq,&LogFreq,&ControlFreq); |
| roselea | 0:bfcb5b67b1d6 | 113 | printf("temp read time %d, log time %d and control time %d\n",TempFreq,LogFreq,ControlFreq); |
| roselea | 0:bfcb5b67b1d6 | 114 | fscanf(fp,"%f",&SetPoint); |
| roselea | 0:bfcb5b67b1d6 | 115 | printf("Temperature setpoint is %.1f \n",SetPoint); |
| roselea | 0:bfcb5b67b1d6 | 116 | fscanf(fp,"%d %f",&iHeatingStates,&fHeatingStep); |
| roselea | 0:bfcb5b67b1d6 | 117 | printf("There are %d heating states @ rate of %.1f\n",iHeatingStates,fHeatingStep); |
| roselea | 0:bfcb5b67b1d6 | 118 | fscanf(fp,"%d %d",&iCoolingStates,&iCoolingStep); |
| roselea | 0:bfcb5b67b1d6 | 119 | printf("There are %d cooling states @ rate of %d\n",iCoolingStates,iCoolingStep); |
| roselea | 0:bfcb5b67b1d6 | 120 | |
| roselea | 0:bfcb5b67b1d6 | 121 | fclose(fp); |
| roselea | 0:bfcb5b67b1d6 | 122 | oLedFileOpen=0; |
| roselea | 0:bfcb5b67b1d6 | 123 | |
| roselea | 0:bfcb5b67b1d6 | 124 | // Initilize hardware |
| roselea | 0:bfcb5b67b1d6 | 125 | for (x=0; x<NUM_THERMS; x++) //set up thermometers |
| roselea | 0:bfcb5b67b1d6 | 126 | if (!oThermos[x].initialize()) |
| roselea | 0:bfcb5b67b1d6 | 127 | printf("Thermometer %d failed to initialse\n",x); |
| roselea | 0:bfcb5b67b1d6 | 128 | else { |
| roselea | 0:bfcb5b67b1d6 | 129 | fTemps[x][0]=oThermos[x].readTemperature(); |
| roselea | 0:bfcb5b67b1d6 | 130 | for (int y=1; y<=SAMPLE_SIZE; y++) |
| roselea | 0:bfcb5b67b1d6 | 131 | fTemps[x][y]=fTemps[x][0]; //load into all entries |
| roselea | 0:bfcb5b67b1d6 | 132 | } |
| roselea | 0:bfcb5b67b1d6 | 133 | iCurrentSample=1; |
| roselea | 0:bfcb5b67b1d6 | 134 | |
| roselea | 0:bfcb5b67b1d6 | 135 | oPump=0; // Turn off the pump |
| roselea | 0:bfcb5b67b1d6 | 136 | oLedPump=0; |
| roselea | 0:bfcb5b67b1d6 | 137 | |
| roselea | 0:bfcb5b67b1d6 | 138 | //Set_servo(FreshAirBypass,0); |
| roselea | 0:bfcb5b67b1d6 | 139 | //Set_servo(HeatExBypass,0); |
| roselea | 0:bfcb5b67b1d6 | 140 | |
| roselea | 0:bfcb5b67b1d6 | 141 | start = time(NULL); |
| roselea | 0:bfcb5b67b1d6 | 142 | nexttemp=start-10; //cause all actions at the start |
| roselea | 0:bfcb5b67b1d6 | 143 | nextcontrol=start-10; |
| roselea | 0:bfcb5b67b1d6 | 144 | nextlog=start-10; |
| roselea | 0:bfcb5b67b1d6 | 145 | |
| roselea | 0:bfcb5b67b1d6 | 146 | // infinite control loop ... |
| roselea | 0:bfcb5b67b1d6 | 147 | while (1) { |
| roselea | 0:bfcb5b67b1d6 | 148 | now=time(NULL); |
| roselea | 0:bfcb5b67b1d6 | 149 | printf("%d\n",now); |
| roselea | 0:bfcb5b67b1d6 | 150 | if (now>=nexttemp) { |
| roselea | 0:bfcb5b67b1d6 | 151 | nexttemp+=TempFreq; |
| roselea | 0:bfcb5b67b1d6 | 152 | read_temps(); |
| roselea | 0:bfcb5b67b1d6 | 153 | } |
| roselea | 0:bfcb5b67b1d6 | 154 | if (now>=nextcontrol) { |
| roselea | 0:bfcb5b67b1d6 | 155 | nextcontrol+=ControlFreq; |
| roselea | 0:bfcb5b67b1d6 | 156 | do_controls(); |
| roselea | 0:bfcb5b67b1d6 | 157 | } |
| roselea | 0:bfcb5b67b1d6 | 158 | if (eState>0 && fTemps[HeatedAir][0]!=fHeatingValue) adjust_pump(fTemps[HeatedAir][0],fHeatingValue); |
| roselea | 0:bfcb5b67b1d6 | 159 | |
| roselea | 0:bfcb5b67b1d6 | 160 | if (oSDCardPresent==1 && bSDfs_active) { //SD Card removed and SD file system is instansiated |
| roselea | 0:bfcb5b67b1d6 | 161 | delete poSD; //deconstruct the SD File System |
| roselea | 0:bfcb5b67b1d6 | 162 | bSDfs_active=false; |
| roselea | 0:bfcb5b67b1d6 | 163 | printf("SD Card removed\n"); |
| roselea | 0:bfcb5b67b1d6 | 164 | } |
| roselea | 0:bfcb5b67b1d6 | 165 | if (oSDCardPresent==0 && !bSDfs_active) { //SD Card inserted and SD file system is void |
| roselea | 0:bfcb5b67b1d6 | 166 | poSD=new SDFileSystem(p11, p12, p13, p14, "poSD"); //construct the SD File System |
| roselea | 0:bfcb5b67b1d6 | 167 | bSDfs_active=true; |
| roselea | 0:bfcb5b67b1d6 | 168 | printf("SD Card inserted\n"); |
| roselea | 0:bfcb5b67b1d6 | 169 | } |
| roselea | 0:bfcb5b67b1d6 | 170 | if (now>=nextlog) { |
| roselea | 0:bfcb5b67b1d6 | 171 | nextlog+=LogFreq; |
| roselea | 0:bfcb5b67b1d6 | 172 | log_values(now); |
| roselea | 0:bfcb5b67b1d6 | 173 | } |
| roselea | 0:bfcb5b67b1d6 | 174 | wait (1); //waste some time |
| roselea | 0:bfcb5b67b1d6 | 175 | } |
| roselea | 0:bfcb5b67b1d6 | 176 | } |
| roselea | 0:bfcb5b67b1d6 | 177 | |
| roselea | 0:bfcb5b67b1d6 | 178 | void read_temps() { |
| roselea | 0:bfcb5b67b1d6 | 179 | int x; |
| roselea | 0:bfcb5b67b1d6 | 180 | printf("conversion start\n"); |
| roselea | 0:bfcb5b67b1d6 | 181 | for (x=0; x<NUM_THERMS; x++) |
| roselea | 0:bfcb5b67b1d6 | 182 | fTemps[x][0]=oThermos[x].readTemperature(); |
| roselea | 0:bfcb5b67b1d6 | 183 | printf("conversion finished\n"); |
| roselea | 0:bfcb5b67b1d6 | 184 | } |
| roselea | 0:bfcb5b67b1d6 | 185 | |
| roselea | 0:bfcb5b67b1d6 | 186 | void do_controls() { |
| roselea | 0:bfcb5b67b1d6 | 187 | } |
| roselea | 0:bfcb5b67b1d6 | 188 | |
| roselea | 0:bfcb5b67b1d6 | 189 | void adjust_pump(float current,float required) { |
| roselea | 0:bfcb5b67b1d6 | 190 | if (current>required) |
| roselea | 0:bfcb5b67b1d6 | 191 | oPump=0; |
| roselea | 0:bfcb5b67b1d6 | 192 | else |
| roselea | 0:bfcb5b67b1d6 | 193 | oPump=1; |
| roselea | 0:bfcb5b67b1d6 | 194 | } |
| roselea | 0:bfcb5b67b1d6 | 195 | |
| roselea | 0:bfcb5b67b1d6 | 196 | void set_servo(tServo *poServo,float fTarget) |
| roselea | 0:bfcb5b67b1d6 | 197 | { |
| roselea | 0:bfcb5b67b1d6 | 198 | } |
| roselea | 0:bfcb5b67b1d6 | 199 | void log_values(time_t now) { |
| roselea | 0:bfcb5b67b1d6 | 200 | FILE *fp; |
| roselea | 0:bfcb5b67b1d6 | 201 | int x; |
| roselea | 0:bfcb5b67b1d6 | 202 | char sTime[25]; |
| roselea | 0:bfcb5b67b1d6 | 203 | strftime (sTime,25,"%x %X",localtime(&now)); |
| roselea | 0:bfcb5b67b1d6 | 204 | if (bSDfs_active) { |
| roselea | 0:bfcb5b67b1d6 | 205 | fp=fopen("/poSD/log.csv","a"); |
| roselea | 0:bfcb5b67b1d6 | 206 | if (fp) { |
| roselea | 0:bfcb5b67b1d6 | 207 | oLedFileOpen=1; |
| roselea | 0:bfcb5b67b1d6 | 208 | fprintf(fp,"%s,",sTime); //time |
| roselea | 0:bfcb5b67b1d6 | 209 | for (x=0; x<NUM_THERMS; x++) fprintf(fp,"%.1f,",fTemps[x]); //fTemps |
| roselea | 0:bfcb5b67b1d6 | 210 | //fprintf(fp,"%d,%.1f,",HeatingOn,HeatingSetPoint); // heating data |
| roselea | 0:bfcb5b67b1d6 | 211 | for (x=0; x<NUM_SERVOS; x++) fprintf(fp,"%d,",oServos[x].iCurrent); //servo positions |
| roselea | 0:bfcb5b67b1d6 | 212 | fprintf(fp,",0\r\n"); |
| roselea | 0:bfcb5b67b1d6 | 213 | fclose(fp); |
| roselea | 0:bfcb5b67b1d6 | 214 | oLedFileOpen=0; |
| roselea | 0:bfcb5b67b1d6 | 215 | printf("Written - "); |
| roselea | 0:bfcb5b67b1d6 | 216 | } else printf("Failed - "); |
| roselea | 0:bfcb5b67b1d6 | 217 | } else printf("SD removed - "); |
| roselea | 0:bfcb5b67b1d6 | 218 | fp=stdout; |
| roselea | 0:bfcb5b67b1d6 | 219 | fprintf(fp,"%s,",sTime); //time |
| roselea | 0:bfcb5b67b1d6 | 220 | for (x=0; x<NUM_THERMS; x++) fprintf(fp,"%.1f,",fTemps[x]); //fTemps |
| roselea | 0:bfcb5b67b1d6 | 221 | //fprintf(fp,"%d,%.1f,",HeatingOn,HeatingSetPoint); // heating data |
| roselea | 0:bfcb5b67b1d6 | 222 | for (x=0; x<NUM_SERVOS; x++) fprintf(fp,"%d,",oServos[x].iCurrent); //servo positions |
| roselea | 0:bfcb5b67b1d6 | 223 | fprintf(fp,"0\n"); |
| roselea | 0:bfcb5b67b1d6 | 224 | |
| roselea | 0:bfcb5b67b1d6 | 225 | |
| roselea | 0:bfcb5b67b1d6 | 226 | } |