Rob Toulson / Mbed 2 deprecated PE_09-07_TimeoutInterrupt

by Rob Toulson and Tim Wilmshurst from textbook "Fast and Effective Embedded Systems Design: Applying the ARM mbed"

Dependencies:   mbed

main.cpp@0:7a3136735404, 2013-05-24 (annotated)

Committer:
robt
Date:
Fri May 24 21:48:44 2013 +0000
Revision:
0:7a3136735404
by Rob Toulson and Tim Wilmshurst from textbook "Fast and Effective Embedded Systems Design: Applying the ARM mbed"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
robt 0:7a3136735404 1 /*Program Example 9.7: Demonstrates the use of Timeout and interrupts, to allow response to an event-driven task while a time-driven task continues.
robt 0:7a3136735404 2 */
robt 0:7a3136735404 3 #include "mbed.h"
robt 0:7a3136735404 4 void blink_end (void);
robt 0:7a3136735404 5 void blink (void);
robt 0:7a3136735404 6 void ISR1 (void);
robt 0:7a3136735404 7 DigitalOut led1(LED1);
robt 0:7a3136735404 8 DigitalOut led2(LED2);
robt 0:7a3136735404 9 DigitalOut led3(LED3);
robt 0:7a3136735404 10 Timeout Response; //create a Timeout, and name it Response
robt 0:7a3136735404 11 Timeout Response_duration; //create a Timeout, and name it Response_duration
robt 0:7a3136735404 12 InterruptIn button(p5); //create an interrupt input, named button
robt 0:7a3136735404 13
robt 0:7a3136735404 14 void blink() { //This function is called when Timeout is complete
robt 0:7a3136735404 15 led2=1;
robt 0:7a3136735404 16 // set the duration of the led blink, with another timeout, duration 0.1 s
robt 0:7a3136735404 17 Response_duration.attach(&blink_end, 1);
robt 0:7a3136735404 18 }
robt 0:7a3136735404 19
robt 0:7a3136735404 20 void blink_end() { //A function called at the end of Timeout Response_duration
robt 0:7a3136735404 21 led2=0;
robt 0:7a3136735404 22 }
robt 0:7a3136735404 23
robt 0:7a3136735404 24 void ISR1(){
robt 0:7a3136735404 25 led3=1; //shows button is pressed; diagnostic and not central to program
robt 0:7a3136735404 26 //attach blink1 function to Response Timeout, to occur after 2 seconds
robt 0:7a3136735404 27 Response.attach(&blink, 2.0);
robt 0:7a3136735404 28 }
robt 0:7a3136735404 29
robt 0:7a3136735404 30 int main() {
robt 0:7a3136735404 31 button.rise(&ISR1); //attach the address of ISR1 function to the rising edge
robt 0:7a3136735404 32 while(1) {
robt 0:7a3136735404 33 led3=0; //clear LED3
robt 0:7a3136735404 34 led1=!led1;
robt 0:7a3136735404 35 wait(0.2);
robt 0:7a3136735404 36 }
robt 0:7a3136735404 37 }
robt 0:7a3136735404 38