Tatenda Chikaka / Mbed 2 deprecated tsc23_a3

IoT Assessment 3

Dependencies:   C12832 LM75B mbed

Fork of co838_driving_test_2 by Fred Barnes

assessment2.cpp@6:8510744cd8b8, 2016-02-26 (annotated)

Committer:
co838_tsc23
Date:
Fri Feb 26 21:11:02 2016 +0000
Revision:
6:8510744cd8b8
Assessment 3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
co838_tsc23 6:8510744cd8b8 1
co838_tsc23 6:8510744cd8b8 2
co838_tsc23 6:8510744cd8b8 3 #include "mbed.h" // stock MBED API
co838_tsc23 6:8510744cd8b8 4 #include "C12832.h" // for the LCD
co838_tsc23 6:8510744cd8b8 5 #include "LM75B.h" // for the temperature sensor
co838_tsc23 6:8510744cd8b8 6
co838_tsc23 6:8510744cd8b8 7 // various globals
co838_tsc23 6:8510744cd8b8 8
co838_tsc23 6:8510744cd8b8 9
co838_tsc23 6:8510744cd8b8 10 Serial host (USBTX, USBRX); // to-host UART via OpenSDAv2
co838_tsc23 6:8510744cd8b8 11
co838_tsc23 6:8510744cd8b8 12 C12832 shld_lcd (D11, D13, D12, D7, D10); // LCD on the shield (128x32)
co838_tsc23 6:8510744cd8b8 13
co838_tsc23 6:8510744cd8b8 14 LM75B lm_temp (D14, D15); // temperature sensor
co838_tsc23 6:8510744cd8b8 15
co838_tsc23 6:8510744cd8b8 16
co838_tsc23 6:8510744cd8b8 17 InterruptIn sw2_int (PTC6); // interrupts for the two on-board switches
co838_tsc23 6:8510744cd8b8 18 InterruptIn sw3_int (PTA4);
co838_tsc23 6:8510744cd8b8 19
co838_tsc23 6:8510744cd8b8 20 static volatile int sw2_trig; // switches triggered?
co838_tsc23 6:8510744cd8b8 21 static volatile int sw3_trig;
co838_tsc23 6:8510744cd8b8 22
co838_tsc23 6:8510744cd8b8 23
co838_tsc23 6:8510744cd8b8 24 //various interrupt handlers
co838_tsc23 6:8510744cd8b8 25
co838_tsc23 6:8510744cd8b8 26 void sw2_interrupt (void) // trig 2 interrupt handler
co838_tsc23 6:8510744cd8b8 27 {
co838_tsc23 6:8510744cd8b8 28 sw2_trig = 1;
co838_tsc23 6:8510744cd8b8 29 }
co838_tsc23 6:8510744cd8b8 30
co838_tsc23 6:8510744cd8b8 31
co838_tsc23 6:8510744cd8b8 32 void sw3_interrupt (void) //trig 3 interrupt handler
co838_tsc23 6:8510744cd8b8 33 {
co838_tsc23 6:8510744cd8b8 34 sw3_trig = 1;
co838_tsc23 6:8510744cd8b8 35 }
co838_tsc23 6:8510744cd8b8 36
co838_tsc23 6:8510744cd8b8 37 /*
co838_tsc23 6:8510744cd8b8 38 *The main method displays the temperature in F and C, the different temperature metrics can be accessed by using the two
co838_tsc23 6:8510744cd8b8 39 triggers on the device SW2 and SW3.
co838_tsc23 6:8510744cd8b8 40 */
co838_tsc23 6:8510744cd8b8 41 int main (void)
co838_tsc23 6:8510744cd8b8 42 {
co838_tsc23 6:8510744cd8b8 43
co838_tsc23 6:8510744cd8b8 44 host.baud (38400);
co838_tsc23 6:8510744cd8b8 45
co838_tsc23 6:8510744cd8b8 46 // Initialsising variable for the triggers
co838_tsc23 6:8510744cd8b8 47 sw2_trig = 0;
co838_tsc23 6:8510744cd8b8 48 sw3_trig = 0;
co838_tsc23 6:8510744cd8b8 49
co838_tsc23 6:8510744cd8b8 50 // Initialising a variable for the different modes (F or C)
co838_tsc23 6:8510744cd8b8 51 int mode = 0;
co838_tsc23 6:8510744cd8b8 52
co838_tsc23 6:8510744cd8b8 53 sw2_int.mode (PullUp);
co838_tsc23 6:8510744cd8b8 54 sw2_int.fall (&sw2_interrupt);
co838_tsc23 6:8510744cd8b8 55
co838_tsc23 6:8510744cd8b8 56 sw3_int.mode (PullUp);
co838_tsc23 6:8510744cd8b8 57 sw3_int.fall (&sw3_interrupt);
co838_tsc23 6:8510744cd8b8 58
co838_tsc23 6:8510744cd8b8 59 shld_lcd.cls ();
co838_tsc23 6:8510744cd8b8 60 shld_lcd.locate (1, 1);
co838_tsc23 6:8510744cd8b8 61
co838_tsc23 6:8510744cd8b8 62 //Prints this to the lcd
co838_tsc23 6:8510744cd8b8 63 shld_lcd.printf ("The current temperature is:");
co838_tsc23 6:8510744cd8b8 64
co838_tsc23 6:8510744cd8b8 65
co838_tsc23 6:8510744cd8b8 66
co838_tsc23 6:8510744cd8b8 67 // this loop will run forever
co838_tsc23 6:8510744cd8b8 68 for (;;) {
co838_tsc23 6:8510744cd8b8 69 wait (0.7); // approx 50 cycles/sec
co838_tsc23 6:8510744cd8b8 70
co838_tsc23 6:8510744cd8b8 71 // every 32 cycles, or thereabouts (will be truncated)
co838_tsc23 6:8510744cd8b8 72 float t = lm_temp.read ();
co838_tsc23 6:8510744cd8b8 73
co838_tsc23 6:8510744cd8b8 74 //switch the temp to C
co838_tsc23 6:8510744cd8b8 75 if (sw2_trig) {
co838_tsc23 6:8510744cd8b8 76 mode = 0;
co838_tsc23 6:8510744cd8b8 77 sw2_trig = 0;
co838_tsc23 6:8510744cd8b8 78 }
co838_tsc23 6:8510744cd8b8 79
co838_tsc23 6:8510744cd8b8 80 //switch the temp to F
co838_tsc23 6:8510744cd8b8 81 if (sw3_trig) {
co838_tsc23 6:8510744cd8b8 82 mode = 1;
co838_tsc23 6:8510744cd8b8 83 sw3_trig = 0;
co838_tsc23 6:8510744cd8b8 84 }
co838_tsc23 6:8510744cd8b8 85
co838_tsc23 6:8510744cd8b8 86 // display the temp to the serial HOST and LCD if the temp is in C
co838_tsc23 6:8510744cd8b8 87 if(mode == 0){
co838_tsc23 6:8510744cd8b8 88
co838_tsc23 6:8510744cd8b8 89 host.printf ("Temperature: %.2f celsuis \r\n", t);
co838_tsc23 6:8510744cd8b8 90 shld_lcd.locate (1, 10);
co838_tsc23 6:8510744cd8b8 91 shld_lcd.printf ("%.2f C", t);
co838_tsc23 6:8510744cd8b8 92
co838_tsc23 6:8510744cd8b8 93 }
co838_tsc23 6:8510744cd8b8 94 // display the temp to the serial HOST and LCD if the temp is in F
co838_tsc23 6:8510744cd8b8 95 else if (mode == 1){
co838_tsc23 6:8510744cd8b8 96
co838_tsc23 6:8510744cd8b8 97 float tf = (t * 9.0/5.0 + 32);
co838_tsc23 6:8510744cd8b8 98 host.printf ("Temperature: %.2f fehrenheit \r\n", tf);
co838_tsc23 6:8510744cd8b8 99 shld_lcd.locate (1, 10);
co838_tsc23 6:8510744cd8b8 100 shld_lcd.printf ("%.2f F", tf);
co838_tsc23 6:8510744cd8b8 101
co838_tsc23 6:8510744cd8b8 102
co838_tsc23 6:8510744cd8b8 103 }
co838_tsc23 6:8510744cd8b8 104
co838_tsc23 6:8510744cd8b8 105 }
co838_tsc23 6:8510744cd8b8 106 }