Jovica D. / Mbed 2 deprecated FeuerwehrStoppuhr0805

stoppuhr s

Fork of FeuerwehrStoppuhr by Jovica D.

main.cpp@0:48f4880c730b, 2013-04-19 (annotated)

Committer:
fox46
Date:
Fri Apr 19 18:36:29 2013 +0000
Revision:
0:48f4880c730b
Child:
1:3ed42298abc3
Timer mit Interrupt Tasteneingabe

Who changed what in which revision?

UserRevisionLine numberNew contents of line
fox46 0:48f4880c730b 1 #include "mbed.h"
fox46 0:48f4880c730b 2 #include "PinDetect.h"
fox46 0:48f4880c730b 3 #include "TextLCD.h"
fox46 0:48f4880c730b 4 // must import Cookbook PinDetct library into project
fox46 0:48f4880c730b 5 // URL: http://mbed.org/users/AjK/libraries/PinDetect/lkyxpw
fox46 0:48f4880c730b 6
fox46 0:48f4880c730b 7 DigitalOut myled(LED1);
fox46 0:48f4880c730b 8 DigitalOut myled2(LED2);
fox46 0:48f4880c730b 9 DigitalOut myled3(LED3);
fox46 0:48f4880c730b 10 DigitalOut myled4(LED4);
fox46 0:48f4880c730b 11 Timer t;
fox46 0:48f4880c730b 12 TextLCD lcd(p36, p34, p9, p10, p15, p16); // rs, e, d0-d3
fox46 0:48f4880c730b 13
fox46 0:48f4880c730b 14 PinDetect pb1(p18);
fox46 0:48f4880c730b 15 PinDetect pb2(p19);
fox46 0:48f4880c730b 16 // SPST Pushbutton debounced count demo using interrupts and callback
fox46 0:48f4880c730b 17 // no external PullUp resistor needed
fox46 0:48f4880c730b 18 // Pushbutton from P8 to GND.
fox46 0:48f4880c730b 19 // Second Pushbutton from P7 to GND.
fox46 0:48f4880c730b 20 // A pb hit generates an interrupt and activates the callback function
fox46 0:48f4880c730b 21 // after the switch is debounced
fox46 0:48f4880c730b 22
fox46 0:48f4880c730b 23 // Global count variable
fox46 0:48f4880c730b 24 int volatile count=0;
fox46 0:48f4880c730b 25 int volatile resetcnt=0;
fox46 0:48f4880c730b 26
fox46 0:48f4880c730b 27 // Callback routine is interrupt activated by a debounced pb1 hit
fox46 0:48f4880c730b 28 void pb1_hit_callback (void) {
fox46 0:48f4880c730b 29 count++;
fox46 0:48f4880c730b 30 myled4 = count & 0x01;
fox46 0:48f4880c730b 31 myled3 = (count & 0x02)>>1;
fox46 0:48f4880c730b 32 myled2 = (count & 0x04)>>2;
fox46 0:48f4880c730b 33 t.start();
fox46 0:48f4880c730b 34 if (resetcnt==1) {
fox46 0:48f4880c730b 35 t.reset();
fox46 0:48f4880c730b 36 resetcnt=0;
fox46 0:48f4880c730b 37 }
fox46 0:48f4880c730b 38 }
fox46 0:48f4880c730b 39 // Callback routine is interrupt activated by a debounced pb2 hit
fox46 0:48f4880c730b 40 void pb2_hit_callback (void) {
fox46 0:48f4880c730b 41 count--;
fox46 0:48f4880c730b 42 myled4 = count & 0x01;
fox46 0:48f4880c730b 43 myled3 = (count & 0x02)>>1;
fox46 0:48f4880c730b 44 myled2 = (count & 0x04)>>2;
fox46 0:48f4880c730b 45 t.stop();
fox46 0:48f4880c730b 46 resetcnt=resetcnt++;
fox46 0:48f4880c730b 47 }
fox46 0:48f4880c730b 48 int main() {
fox46 0:48f4880c730b 49
fox46 0:48f4880c730b 50 // Use internal pullups for pushbutton
fox46 0:48f4880c730b 51 //pb1.mode(PullUp);
fox46 0:48f4880c730b 52 //pb2.mode(PullUp);
fox46 0:48f4880c730b 53 // Delay for initial pullup to take effect
fox46 0:48f4880c730b 54 //wait(.01);
fox46 0:48f4880c730b 55 // Setup Interrupt callback functions for a pb hit
fox46 0:48f4880c730b 56 pb1.attach_deasserted(&pb1_hit_callback);
fox46 0:48f4880c730b 57 pb2.attach_deasserted(&pb2_hit_callback);
fox46 0:48f4880c730b 58 // Start sampling pb inputs using interrupts
fox46 0:48f4880c730b 59 pb1.setSampleFrequency();
fox46 0:48f4880c730b 60 pb2.setSampleFrequency();
fox46 0:48f4880c730b 61 //Blink myled in main routine forever while responding to pb changes
fox46 0:48f4880c730b 62 // via interrupts that activate the callback counter function
fox46 0:48f4880c730b 63 while (1) {
fox46 0:48f4880c730b 64 myled = !myled;
fox46 0:48f4880c730b 65
fox46 0:48f4880c730b 66 lcd.printf("Timer\n");
fox46 0:48f4880c730b 67 lcd.printf(" %4.2f sec\n", t.read());
fox46 0:48f4880c730b 68
fox46 0:48f4880c730b 69
fox46 0:48f4880c730b 70 wait(.01);
fox46 0:48f4880c730b 71 lcd.cls();
fox46 0:48f4880c730b 72 resetcnt=1;
fox46 0:48f4880c730b 73
fox46 0:48f4880c730b 74 }
fox46 0:48f4880c730b 75
fox46 0:48f4880c730b 76 }