Jon Trinder / Mbed 2 deprecated gu_squirt_tester

Test code for interfacing to megasquirt ECU.

Dependencies:   jtlcd mbed

main.cpp@0:cf99a7b873b3, 2015-02-14 (annotated)

Committer:
jont
Date:
Sat Feb 14 08:50:32 2015 +0000
Revision:
0:cf99a7b873b3
Child:
2:57a6c415e495
First version checkpoint

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jont 0:cf99a7b873b3 1 #include "mbed.h"
jont 0:cf99a7b873b3 2 #include "jtlcd.h"
jont 0:cf99a7b873b3 3 #include "Counter.h"
jont 0:cf99a7b873b3 4
jont 0:cf99a7b873b3 5
jont 0:cf99a7b873b3 6 float coolant;
jont 0:cf99a7b873b3 7 int int_coolant = 0;
jont 0:cf99a7b873b3 8 void callback_reed(void);
jont 0:cf99a7b873b3 9 void siphon_data();
jont 0:cf99a7b873b3 10
jont 0:cf99a7b873b3 11 DigitalOut myled(LED1);
jont 0:cf99a7b873b3 12 DigitalOut myled2(LED2);
jont 0:cf99a7b873b3 13 DigitalOut myled3(LED3);
jont 0:cf99a7b873b3 14 DigitalOut myled4(LED4);
jont 0:cf99a7b873b3 15
jont 0:cf99a7b873b3 16
jont 0:cf99a7b873b3 17 DigitalIn reed(p9); //would default to in but we wanna play with its mode
jont 0:cf99a7b873b3 18 Counter counter_reed(p9, callback_reed ); //setup the counter to use pin 9
jont 0:cf99a7b873b3 19
jont 0:cf99a7b873b3 20 void sioRXHandler(void);
jont 0:cf99a7b873b3 21 #define combuffsize 256
jont 0:cf99a7b873b3 22 char comBuff[combuffsize]; /* space for commands yeh its small make bigger if you need to */
jont 0:cf99a7b873b3 23 int comBuffIndex; /* buffer index */
jont 0:cf99a7b873b3 24
jont 0:cf99a7b873b3 25 char lineBuffer[32]; //for saving data for the lcd display
jont 0:cf99a7b873b3 26
jont 0:cf99a7b873b3 27 Serial pc(USBTX, USBRX); // tx, rx
jont 0:cf99a7b873b3 28
jont 0:cf99a7b873b3 29 /*=====================================================================================*/
jont 0:cf99a7b873b3 30 //
jont 0:cf99a7b873b3 31 // callback funtions mostly for the counters
jont 0:cf99a7b873b3 32 //
jont 0:cf99a7b873b3 33 /*=====================================================================================*/
jont 0:cf99a7b873b3 34 /*=====================================================================================*/
jont 0:cf99a7b873b3 35 // callback for the reed switch input
jont 0:cf99a7b873b3 36 // puts logentry into the ringbuffer
jont 0:cf99a7b873b3 37 /*=====================================================================================*/
jont 0:cf99a7b873b3 38 void callback_reed()
jont 0:cf99a7b873b3 39 {
jont 0:cf99a7b873b3 40 time_t seconds = time(NULL);
jont 0:cf99a7b873b3 41 //LPC_RTC->GPREG3 = counter_reed.read();
jont 0:cf99a7b873b3 42 __disable_irq(); // Disable Interrupts
jont 0:cf99a7b873b3 43 comBuffIndex = 0;
jont 0:cf99a7b873b3 44 __enable_irq();
jont 0:cf99a7b873b3 45 pc.putc('A');
jont 0:cf99a7b873b3 46
jont 0:cf99a7b873b3 47 }
jont 0:cf99a7b873b3 48
jont 0:cf99a7b873b3 49 void serialInit(void)
jont 0:cf99a7b873b3 50 {
jont 0:cf99a7b873b3 51 pc.attach(&sioRXHandler);
jont 0:cf99a7b873b3 52 }
jont 0:cf99a7b873b3 53
jont 0:cf99a7b873b3 54
jont 0:cf99a7b873b3 55 /*======================================================================*/
jont 0:cf99a7b873b3 56 /* sioRXHandler */
jont 0:cf99a7b873b3 57 /*======================================================================*/
jont 0:cf99a7b873b3 58 /*
jont 0:cf99a7b873b3 59 This is inefficient and long handed but makes explaining it to someone
jont 0:cf99a7b873b3 60 easier.
jont 0:cf99a7b873b3 61
jont 0:cf99a7b873b3 62 Which is the point, to be understandable at this stage :-)
jont 0:cf99a7b873b3 63
jont 0:cf99a7b873b3 64
jont 0:cf99a7b873b3 65 If more data received than buffer length we throw it away!
jont 0:cf99a7b873b3 66 */
jont 0:cf99a7b873b3 67 void sioRXHandler(void)
jont 0:cf99a7b873b3 68 {
jont 0:cf99a7b873b3 69 char theChar = 0x00;
jont 0:cf99a7b873b3 70 myled2 = 1;
jont 0:cf99a7b873b3 71 myled3 = 1;
jont 0:cf99a7b873b3 72 while (pc.readable()){
jont 0:cf99a7b873b3 73 theChar = pc.getc();
jont 0:cf99a7b873b3 74 pc.putc(theChar); //echo it back
jont 0:cf99a7b873b3 75 if (comBuffIndex >= combuffsize - 1)
jont 0:cf99a7b873b3 76 {
jont 0:cf99a7b873b3 77 comBuffIndex = combuffsize - 1;
jont 0:cf99a7b873b3 78 }
jont 0:cf99a7b873b3 79 comBuff[comBuffIndex] = theChar;
jont 0:cf99a7b873b3 80 comBuffIndex++;
jont 0:cf99a7b873b3 81 }
jont 0:cf99a7b873b3 82 myled2 = 0;
jont 0:cf99a7b873b3 83 }
jont 0:cf99a7b873b3 84
jont 0:cf99a7b873b3 85 /*======================================================================*/
jont 0:cf99a7b873b3 86 /* Main */
jont 0:cf99a7b873b3 87 /*======================================================================*/
jont 0:cf99a7b873b3 88 int main() {
jont 0:cf99a7b873b3 89 setbuf(stdout, NULL);
jont 0:cf99a7b873b3 90 // no buffering for this filehandle, this stop the weird
jont 0:cf99a7b873b3 91 //behaviour with things not being dfiplaye untill a character was received.
jont 0:cf99a7b873b3 92 serialInit();
jont 0:cf99a7b873b3 93 reed.mode(PullUp);
jont 0:cf99a7b873b3 94
jont 0:cf99a7b873b3 95 LcdInit();
jont 0:cf99a7b873b3 96 LcdHomeTop();
jont 0:cf99a7b873b3 97 LcdWriteTextLine("GM0HYY");
jont 0:cf99a7b873b3 98 LcdHomeBottom();
jont 0:cf99a7b873b3 99 LcdWriteTextLine("Hello World");
jont 0:cf99a7b873b3 100 while(1) {
jont 0:cf99a7b873b3 101 siphon_data();
jont 0:cf99a7b873b3 102 myled = 1;
jont 0:cf99a7b873b3 103 wait(0.2);
jont 0:cf99a7b873b3 104 myled = 0;
jont 0:cf99a7b873b3 105 wait(0.2);
jont 0:cf99a7b873b3 106 LcdHomeBottom();
jont 0:cf99a7b873b3 107 sprintf(lineBuffer,"%.3f %04X %3d", coolant, int_coolant, counter_reed.read());
jont 0:cf99a7b873b3 108 LcdWriteTextLine(lineBuffer);
jont 0:cf99a7b873b3 109 }
jont 0:cf99a7b873b3 110 }
jont 0:cf99a7b873b3 111
jont 0:cf99a7b873b3 112 void siphon_data(){
jont 0:cf99a7b873b3 113 __disable_irq(); // Disable Interrupts
jont 0:cf99a7b873b3 114
jont 0:cf99a7b873b3 115 int_coolant = 0;
jont 0:cf99a7b873b3 116 if(comBuffIndex > 24){
jont 0:cf99a7b873b3 117 int_coolant = comBuff[23];
jont 0:cf99a7b873b3 118 int_coolant <<= 8;
jont 0:cf99a7b873b3 119 int_coolant |= comBuff[22];
jont 0:cf99a7b873b3 120 coolant = (int_coolant-320) * 0.05555;
jont 0:cf99a7b873b3 121 }
jont 0:cf99a7b873b3 122 __enable_irq();
jont 0:cf99a7b873b3 123
jont 0:cf99a7b873b3 124 }