rosco pekolt / Mbed 2 deprecated nRF51822

This code is tho put in evidence a BUG in the TIMER implementation on Nordic TIMER bug nRF51822. This Example was created for plateform nRF51-DK. Led 2 will stop blinking (crashed main) when user button is pressed several time. User button start an interrpt, the interrupt set a tickker timer 200ms laterthe change LED 1. Meanwhile in the main loop LED 2 is changing state. You will see taht after a chile LED2 will sotp blinking meaning that program is crashed.

Dependencies:   mbed

Fork of mbed_blinky by Mbed

main.cpp@7:a121fc972b2a, 2014-12-29 (annotated)

Committer:
roscop
Date:
Mon Dec 29 11:03:29 2014 +0000
Revision:
7:a121fc972b2a
Parent:
4:81cea7a352b0 
this code is tho put in evidence a bug in the TIMER implementation on Nordic nRF51822. Example was created for plateform nRF51-DK.; Led 2 will stop blinking (crashed main) when user button 2 is pressed several time.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
roscop 7:a121fc972b2a 1 #include "mbed.h"
roscop 7:a121fc972b2a 2
roscop 7:a121fc972b2a 3 Ticker flipper1;
roscop 7:a121fc972b2a 4 Timer t1;
roscop 7:a121fc972b2a 5
roscop 7:a121fc972b2a 6 InterruptIn button(p17);
roscop 7:a121fc972b2a 7 DigitalOut led1(p24);
roscop 7:a121fc972b2a 8 DigitalOut led2(p23);
roscop 7:a121fc972b2a 9
roscop 7:a121fc972b2a 10
roscop 7:a121fc972b2a 11
roscop 7:a121fc972b2a 12 void trigger()
roscop 7:a121fc972b2a 13 {
roscop 7:a121fc972b2a 14
roscop 7:a121fc972b2a 15 t1.reset ();
roscop 7:a121fc972b2a 16
roscop 7:a121fc972b2a 17 led1 = !led1;
roscop 7:a121fc972b2a 18
roscop 7:a121fc972b2a 19 button.enable_irq ();
roscop 7:a121fc972b2a 20 flipper1.detach(); // the address of the function to be attached (flip) and the interval (2 seconds)
roscop 7:a121fc972b2a 21
roscop 7:a121fc972b2a 22 }
roscop 7:a121fc972b2a 23
roscop 7:a121fc972b2a 24 void interrupt_in()
roscop 7:a121fc972b2a 25 {
roscop 7:a121fc972b2a 26
roscop 7:a121fc972b2a 27 flipper1.attach_us(&trigger, 200000); // the address of the function to be attached (flip) and the interval (2 seconds)
roscop 7:a121fc972b2a 28 button.disable_irq ();
roscop 7:a121fc972b2a 29 }
roscop 7:a121fc972b2a 30
roscop 7:a121fc972b2a 31 int main()
roscop 7:a121fc972b2a 32 {
roscop 7:a121fc972b2a 33 button.rise(&interrupt_in); // attach the address of th
roscop 7:a121fc972b2a 34 t1.start();
roscop 7:a121fc972b2a 35
roscop 7:a121fc972b2a 36 while(1) {
roscop 7:a121fc972b2a 37 led2 = !led2;
roscop 7:a121fc972b2a 38 wait(0.5);
roscop 7:a121fc972b2a 39 }
roscop 7:a121fc972b2a 40 }