Thatcher Chamberlin / Mbed 2 deprecated InterruptCapture

For use in my acoustic touchscreen project, found here: http://hackaday.io/project/1990-Low-Cost-Touchscreen-Anywhere

Dependencies:   mbed

main.cpp@4:99bd88e2b2e7, 2014-10-31 (annotated)

Committer:
ThatcherC
Date:
Fri Oct 31 19:13:12 2014 +0000
Revision:
4:99bd88e2b2e7
Parent:
3:5d221e8f4012 
Added more comments;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ThatcherC 0:d678323f9a72 1 #include "mbed.h"
ThatcherC 0:d678323f9a72 2
ThatcherC 2:2ccbee38f4a8 3 Serial pc(dp16,dp15);
ThatcherC 0:d678323f9a72 4 DigitalOut myled(dp1);
ThatcherC 0:d678323f9a72 5 DigitalOut led2(dp4);
ThatcherC 0:d678323f9a72 6 InterruptIn int1(dp14);
ThatcherC 0:d678323f9a72 7 InterruptIn int2(dp13);
ThatcherC 0:d678323f9a72 8 Timer t;
ThatcherC 0:d678323f9a72 9 Timeout reset;
ThatcherC 0:d678323f9a72 10 bool first = true;
ThatcherC 0:d678323f9a72 11 bool timeAvailable = false;
ThatcherC 0:d678323f9a72 12
ThatcherC 0:d678323f9a72 13 void reset1();
ThatcherC 0:d678323f9a72 14 void reset2();
ThatcherC 0:d678323f9a72 15
ThatcherC 0:d678323f9a72 16 float timeArray[3]; //important. this stores the delays between vibration detections
ThatcherC 0:d678323f9a72 17 //right now only indices 0 and 1 are used
ThatcherC 3:5d221e8f4012 18
ThatcherC 3:5d221e8f4012 19
ThatcherC 3:5d221e8f4012 20 //Code from: http://mbed.org/users/ThatcherC/code/WatchDogTest/
ThatcherC 3:5d221e8f4012 21 class Watchdog {
ThatcherC 3:5d221e8f4012 22 public:
ThatcherC 3:5d221e8f4012 23 // Load timeout value in watchdog timer and enable
ThatcherC 3:5d221e8f4012 24 void kick(float s) {
ThatcherC 3:5d221e8f4012 25 LPC_SYSCON->SYSAHBCLKCTRL = LPC_SYSCON->SYSAHBCLKCTRL|(1<<15);
ThatcherC 3:5d221e8f4012 26 LPC_SYSCON->WDTCLKSEL = 0x1; // Set CLK src to Main Clock
ThatcherC 3:5d221e8f4012 27 LPC_SYSCON->WDTCLKUEN = 0x01; /* Update clock */
ThatcherC 3:5d221e8f4012 28 LPC_SYSCON->WDTCLKUEN = 0x00; /* Toggle update register once */
ThatcherC 3:5d221e8f4012 29 LPC_SYSCON->WDTCLKUEN = 0x01;
ThatcherC 3:5d221e8f4012 30 LPC_SYSCON->WDTCLKDIV = 0x10;
ThatcherC 3:5d221e8f4012 31 uint32_t clk = SystemCoreClock/16; // WD has a fixed /4 prescaler, PCLK default is /4
ThatcherC 3:5d221e8f4012 32 LPC_WDT->TC = s * (float)clk;
ThatcherC 3:5d221e8f4012 33 LPC_WDT->MOD = 0x3; // Enabled and Reset
ThatcherC 3:5d221e8f4012 34 kick();
ThatcherC 3:5d221e8f4012 35 }
ThatcherC 3:5d221e8f4012 36 // "kick" or "feed" the dog - reset the watchdog timer
ThatcherC 3:5d221e8f4012 37 // by writing this required bit pattern
ThatcherC 3:5d221e8f4012 38 void kick() {
ThatcherC 3:5d221e8f4012 39 LPC_WDT->FEED = 0xAA;
ThatcherC 3:5d221e8f4012 40 LPC_WDT->FEED = 0x55;
ThatcherC 3:5d221e8f4012 41 }
ThatcherC 3:5d221e8f4012 42 };
ThatcherC 3:5d221e8f4012 43
ThatcherC 4:99bd88e2b2e7 44 Watchdog w; //used to reset the microcontroller when/if it halts
ThatcherC 3:5d221e8f4012 45
ThatcherC 0:d678323f9a72 46 void flip1(){
ThatcherC 0:d678323f9a72 47 if(first){
ThatcherC 0:d678323f9a72 48 t.start();
ThatcherC 0:d678323f9a72 49 int1.fall(NULL);
ThatcherC 0:d678323f9a72 50 first = false;
ThatcherC 0:d678323f9a72 51 reset.attach(&reset1,0.01);
ThatcherC 0:d678323f9a72 52 }else{
ThatcherC 0:d678323f9a72 53 t.stop();
ThatcherC 0:d678323f9a72 54 timeArray[0]=t.read();
ThatcherC 0:d678323f9a72 55 reset.detach();
ThatcherC 0:d678323f9a72 56 timeAvailable=true;
ThatcherC 0:d678323f9a72 57 first = true;
ThatcherC 0:d678323f9a72 58 }
ThatcherC 0:d678323f9a72 59 myled = 1;
ThatcherC 0:d678323f9a72 60 }
ThatcherC 0:d678323f9a72 61
ThatcherC 0:d678323f9a72 62 void flip2(){
ThatcherC 0:d678323f9a72 63 if(first){
ThatcherC 0:d678323f9a72 64 t.start();
ThatcherC 0:d678323f9a72 65 int2.fall(NULL);
ThatcherC 0:d678323f9a72 66 first = false;
ThatcherC 0:d678323f9a72 67 reset.attach(&reset2,0.01);
ThatcherC 0:d678323f9a72 68 }else{
ThatcherC 0:d678323f9a72 69 t.stop();
ThatcherC 0:d678323f9a72 70 timeArray[1]=t.read();
ThatcherC 0:d678323f9a72 71 reset.detach();
ThatcherC 0:d678323f9a72 72 timeAvailable=true;
ThatcherC 0:d678323f9a72 73 first = true;
ThatcherC 0:d678323f9a72 74 }
ThatcherC 0:d678323f9a72 75 led2 = 1;
ThatcherC 0:d678323f9a72 76 }
ThatcherC 0:d678323f9a72 77
ThatcherC 4:99bd88e2b2e7 78 void reset1(){ //used to reset interrupt 1 if too much time passes
ThatcherC 0:d678323f9a72 79 t.stop();
ThatcherC 0:d678323f9a72 80 t.reset();
ThatcherC 0:d678323f9a72 81 first = true;
ThatcherC 0:d678323f9a72 82 int1.fall(&flip1);
ThatcherC 0:d678323f9a72 83 }
ThatcherC 0:d678323f9a72 84
ThatcherC 4:99bd88e2b2e7 85 void reset2(){ //used to reset interrupt 1 if too much time passes
ThatcherC 0:d678323f9a72 86 t.stop();
ThatcherC 0:d678323f9a72 87 t.reset();
ThatcherC 0:d678323f9a72 88 first = true;
ThatcherC 0:d678323f9a72 89 int2.fall(&flip2);
ThatcherC 0:d678323f9a72 90 }
ThatcherC 0:d678323f9a72 91
ThatcherC 0:d678323f9a72 92 int main() {
ThatcherC 2:2ccbee38f4a8 93 pc.baud(115200);
ThatcherC 2:2ccbee38f4a8 94 pc.printf("Ready\n");
ThatcherC 3:5d221e8f4012 95 w.kick(.1);
ThatcherC 0:d678323f9a72 96 int1.fall(&flip1);
ThatcherC 0:d678323f9a72 97 int2.fall(&flip2);
ThatcherC 0:d678323f9a72 98 timeArray[0] = 0;
ThatcherC 0:d678323f9a72 99 timeArray[1] = 0;
ThatcherC 0:d678323f9a72 100 timeArray[2] = 0; //for now this isn't used (only two sensors)
ThatcherC 0:d678323f9a72 101 while(1){
ThatcherC 0:d678323f9a72 102 if(timeAvailable){
ThatcherC 2:2ccbee38f4a8 103 int tA0 = int(timeArray[0]*1000000);
ThatcherC 2:2ccbee38f4a8 104 int tA1 = int(timeArray[1]*1000000);
ThatcherC 3:5d221e8f4012 105 pc.printf("%i\t",tA0-tA1);
ThatcherC 0:d678323f9a72 106 t.reset();
ThatcherC 0:d678323f9a72 107 timeArray[0] = 0;
ThatcherC 0:d678323f9a72 108 timeArray[1] = 0;
ThatcherC 0:d678323f9a72 109 timeArray[2] = 0; //for now this isn't used (only two sensors)
ThatcherC 0:d678323f9a72 110 timeAvailable=false;
ThatcherC 0:d678323f9a72 111 wait(.1);
ThatcherC 0:d678323f9a72 112 int1.fall(&flip1);
ThatcherC 0:d678323f9a72 113 int2.fall(&flip2);
ThatcherC 0:d678323f9a72 114 }
ThatcherC 3:5d221e8f4012 115 w.kick();
ThatcherC 0:d678323f9a72 116 }
ThatcherC 0:d678323f9a72 117 }