Wren Dougherty / Mbed 2 deprecated HW7Wren

Connections to Xively working; has 5 channels on Xively (axl_x, axl_y, axl_z, heater_status, temperature)

Dependencies:   C12832_lcd EthernetInterface LM75B MMA7660 NTPClient libxively mbed-rtos mbed

main.cpp@2:cf992d90396e, 2014-05-18 (annotated)

Committer:
wren301
Date:
Sun May 18 03:23:37 2014 +0000
Revision:
2:cf992d90396e
Parent:
1:0d467ac74808
Child:
3:3a48ed10d6fe
HW5 everything tested and working except JSON;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wren301 0:785d351db1ad 1 #include "mbed.h"
wren301 0:785d351db1ad 2 #include "EthernetInterface.h"
wren301 0:785d351db1ad 3 #include "NTPClient.h"
wren301 0:785d351db1ad 4 #include "C12832_lcd.h"
wren301 0:785d351db1ad 5 #include "LM75B.h"
wren301 0:785d351db1ad 6 #include "MMA7660.h"
wren301 0:785d351db1ad 7
wren301 0:785d351db1ad 8 #define PST_OFFSET 7*60*60
wren301 0:785d351db1ad 9
wren301 0:785d351db1ad 10 Ticker timer;
wren301 0:785d351db1ad 11 C12832_LCD lcd; //Graphics LCD
wren301 0:785d351db1ad 12 EthernetInterface eth; //Networking functions
wren301 0:785d351db1ad 13 NTPClient ntp; //NTP client
wren301 0:785d351db1ad 14 LM75B tmp(p28,p27);
wren301 2:cf992d90396e 15 float lowTemp = 74;
wren301 2:cf992d90396e 16 float highTemp = 86;
wren301 0:785d351db1ad 17 float temp;
wren301 0:785d351db1ad 18 int heaterOn = 0;
wren301 2:cf992d90396e 19 AnalogIn pot1(p20);
wren301 2:cf992d90396e 20 AnalogIn pot2(p19);
wren301 0:785d351db1ad 21 #define LOOP_DELAY_MS 100
wren301 0:785d351db1ad 22 //update time every 10 minutes
wren301 0:785d351db1ad 23 #define UPDATE_TIME 60*1
wren301 1:0d467ac74808 24
wren301 0:785d351db1ad 25 MMA7660 MMA(p28, p27);
wren301 0:785d351db1ad 26 int updateTimeFromServer = 1;
wren301 2:cf992d90396e 27
wren301 0:785d351db1ad 28 void connectToTheInternet() {
wren301 0:785d351db1ad 29 eth.init(); //Init and use DHCP
wren301 0:785d351db1ad 30 wait(2);
wren301 0:785d351db1ad 31 lcd.cls();
wren301 0:785d351db1ad 32 lcd.printf("Getting IP Address\r\n");
wren301 2:cf992d90396e 33 printf("\n\rGetting IP Address\r\n");
wren301 0:785d351db1ad 34 if(eth.connect(60000)!=0) {
wren301 0:785d351db1ad 35 lcd.printf("DHCP error - No IP");
wren301 0:785d351db1ad 36 wait(10);
wren301 0:785d351db1ad 37 } else {
wren301 0:785d351db1ad 38 lcd.printf("IP is %s\n", eth.getIPAddress());
wren301 0:785d351db1ad 39 printf("IP is %s\n", eth.getIPAddress());
wren301 0:785d351db1ad 40 wait(2);
wren301 0:785d351db1ad 41 }
wren301 0:785d351db1ad 42 lcd.cls();
wren301 0:785d351db1ad 43 }
wren301 0:785d351db1ad 44
wren301 1:0d467ac74808 45 void updateTimeRoutine() {
wren301 1:0d467ac74808 46 if (ntp.setTime("0.pool.ntp.org") == 0) {
wren301 1:0d467ac74808 47 printf("Time updated!");
wren301 1:0d467ac74808 48 } else {
wren301 1:0d467ac74808 49 lcd.locate(0,0);
wren301 1:0d467ac74808 50 printf("Time update failed \n\r");
wren301 1:0d467ac74808 51 lcd.printf("Time update failed");
wren301 1:0d467ac74808 52 }
wren301 1:0d467ac74808 53 updateTimeFromServer = 0;
wren301 1:0d467ac74808 54 }
wren301 1:0d467ac74808 55
wren301 0:785d351db1ad 56 void updateTime() {
wren301 0:785d351db1ad 57 updateTimeFromServer = 1;
wren301 0:785d351db1ad 58 }
wren301 0:785d351db1ad 59
wren301 2:cf992d90396e 60 //POT values are 0:1, will allow high and low temperatures
wren301 2:cf992d90396e 61 //lets you set temp between 50 and 100 degrees
wren301 2:cf992d90396e 62 void updateTempsFromPots() {
wren301 2:cf992d90396e 63 float lowTempPot = pot2*50.0+50;
wren301 2:cf992d90396e 64 float highTempPot = pot1*50.0+50;
wren301 2:cf992d90396e 65 //round to the nearest whole number
wren301 2:cf992d90396e 66 lowTempPot = floor(lowTempPot+.5);
wren301 2:cf992d90396e 67 highTempPot = floor(highTempPot+.5);
wren301 2:cf992d90396e 68 //high temp must be at least 1 degree above low temp
wren301 2:cf992d90396e 69 if (highTempPot <= lowTempPot) {highTempPot = lowTempPot +1;}
wren301 2:cf992d90396e 70 //Refresh the display if the temps have changed by more than a degree
wren301 2:cf992d90396e 71 if ((lowTemp != lowTempPot) || (highTemp != highTempPot)) {
wren301 2:cf992d90396e 72 lowTemp = lowTempPot;
wren301 2:cf992d90396e 73 highTemp = highTempPot;
wren301 2:cf992d90396e 74 lcd.locate(0,0);
wren301 2:cf992d90396e 75 lcd.printf("\n\r%.1f LOW: %.0f HIGH: %.0f", temp, lowTemp, highTemp);
wren301 2:cf992d90396e 76 printf("LOW: %.2f HIGH: %.2f\n\r", lowTemp, highTemp);
wren301 1:0d467ac74808 77 }
wren301 1:0d467ac74808 78 }
wren301 1:0d467ac74808 79
wren301 0:785d351db1ad 80 int main()
wren301 0:785d351db1ad 81 {
wren301 0:785d351db1ad 82 connectToTheInternet();
wren301 0:785d351db1ad 83 //Variable to hold the current minute so we only update the display when the minute changes
wren301 0:785d351db1ad 84 char currentMinute[2];
wren301 0:785d351db1ad 85 currentMinute[1] = 'a';
wren301 0:785d351db1ad 86 char minute[2];
wren301 2:cf992d90396e 87
wren301 0:785d351db1ad 88 float currentTemp = -200;
wren301 0:785d351db1ad 89 lcd.printf("Updating time...\r\n");
wren301 0:785d351db1ad 90 printf("Updating time...\r\n");
wren301 0:785d351db1ad 91 if (ntp.setTime("0.pool.ntp.org") == 0) {
wren301 0:785d351db1ad 92 printf("Set time successfully\r\n");
wren301 0:785d351db1ad 93 lcd.cls();
wren301 0:785d351db1ad 94 timer.attach(&updateTime, UPDATE_TIME);
wren301 0:785d351db1ad 95 lcd.printf("\n\r\n\rHEATER OFF");
wren301 0:785d351db1ad 96
wren301 1:0d467ac74808 97 while(1) {
wren301 0:785d351db1ad 98 if(updateTimeFromServer) {
wren301 1:0d467ac74808 99 updateTimeRoutine();
wren301 0:785d351db1ad 100 }
wren301 2:cf992d90396e 101 //Sets temp from POTs
wren301 2:cf992d90396e 102 updateTempsFromPots();
wren301 0:785d351db1ad 103 //Fetch the time
wren301 1:0d467ac74808 104 time_t ctTime;
wren301 0:785d351db1ad 105 ctTime = time(NULL)- PST_OFFSET;
wren301 0:785d351db1ad 106 char timeBuffer[32];
wren301 0:785d351db1ad 107
wren301 0:785d351db1ad 108 //See if the minute has changed; set an update display flag if it has
wren301 0:785d351db1ad 109 strftime(minute, 8, "%M", localtime(&ctTime));
wren301 0:785d351db1ad 110 if ( (minute[1] != currentMinute[1]) ) {
wren301 0:785d351db1ad 111 //Formats the time for display
wren301 0:785d351db1ad 112 strftime(timeBuffer, 32, "%a %b %d %I:%M%p\n\r", localtime(&ctTime));
wren301 0:785d351db1ad 113 printf("%s\r", timeBuffer);
wren301 0:785d351db1ad 114 lcd.locate(0,0);
wren301 0:785d351db1ad 115 lcd.printf("%s\r", timeBuffer);
wren301 0:785d351db1ad 116 currentMinute[1] = minute[1];
wren301 0:785d351db1ad 117 }
wren301 1:0d467ac74808 118
wren301 0:785d351db1ad 119 //Update the temperature display if the temperature, set temp has changed
wren301 0:785d351db1ad 120 temp = tmp.read()*9.0/5.0 + 32.0;
wren301 0:785d351db1ad 121 //checks if the temperature (rounded to the nearest whole number) has changed
wren301 0:785d351db1ad 122 if (floor(temp+.5) != floor(currentTemp+.5)) {
wren301 2:cf992d90396e 123 printf("Temp change: %.1f F\n\r", temp);
wren301 0:785d351db1ad 124 currentTemp = temp;
wren301 0:785d351db1ad 125 lcd.locate(0,0);
wren301 2:cf992d90396e 126 lcd.printf("\n\r%.1f LOW: %.0f HIGH: %.0f", temp, lowTemp, highTemp);
wren301 1:0d467ac74808 127 }
wren301 2:cf992d90396e 128
wren301 0:785d351db1ad 129 lcd.locate(0,0);
wren301 2:cf992d90396e 130 //Heater logic: turns off if it has gone over the high temp, on if under the low temp
wren301 2:cf992d90396e 131 if (heaterOn && (temp > highTemp) ) {
wren301 0:785d351db1ad 132 printf("Heater turned OFF\n\r");
wren301 0:785d351db1ad 133 heaterOn = 0;
wren301 0:785d351db1ad 134 lcd.locate(0,0);
wren301 0:785d351db1ad 135 lcd.printf("\n\r\n\rHEATER OFF");
wren301 2:cf992d90396e 136 } else if (!heaterOn && (temp < lowTemp) ) {
wren301 0:785d351db1ad 137 printf("Heater turned ON\n\r");
wren301 0:785d351db1ad 138 heaterOn = 1;
wren301 0:785d351db1ad 139 lcd.locate(0,0);
wren301 0:785d351db1ad 140 lcd.printf("\n\r\n\rHEATER ON");
wren301 0:785d351db1ad 141 }
wren301 0:785d351db1ad 142 wait(LOOP_DELAY_MS*.001);
wren301 0:785d351db1ad 143 }
wren301 0:785d351db1ad 144 } else {
wren301 0:785d351db1ad 145 lcd.printf("NTP Error\r\n");
wren301 0:785d351db1ad 146 }
wren301 0:785d351db1ad 147 eth.disconnect();
wren301 0:785d351db1ad 148 }