bug with the hardware interrrupts and ticker

Questions » bug with the hardware interrrupts and ticker

rosco pekolt

9 years, 11 months ago.

Hi,

I have a problem on this plateform when I use a hardware interrupt and a ticker, the main just crashes. Same code on Nucleao works fine. Here a full description of the bug with the code:

http://developer.mbed.org/forum/repo-56921-nRF51822-community/topic/5393/

thanks for your help,

Question relating to:

Last updated: 27 Aug 2020

Nordic nRF51-DK

The nRF51 Development Kit is a single-board development kit for Bluetooth Smart, ANT and 2.4GHz proprietary applications using the nRF51 Series SoC. This kit supports both development for both nRF51822 …

posted by Martin Kojtal 05 Jan 2015

yep this is the same

posted by rosco pekolt 05 Jan 2015

This has my attention now. I'll try to reproduce this and report before end-of-day tomorrow. Apologies for the trouble.

posted by Rohit Grover 05 Jan 2015

1 Answer

Rohit Grover

9 years, 11 months ago.

I've reproduced the issue with the following:

code needed to reproduce the problem

#include "mbed.h"

Ticker flipper1;

InterruptIn button(BUTTON1);
DigitalOut led1(LED1);
DigitalOut led2(LED2);

void trigger()
{
    led1 = !led1;

    button.enable_irq();
    flipper1.detach();
}

void interrupt_in()
{
    flipper1.attach_us(&trigger, 200000); // the address of the function to be attached (flip) and the interval (200 msecs)
    button.disable_irq();
}

int main()
{
    button.rise(&interrupt_in);
    while(1) {
        led2 = !led2;
        wait(0.5);
    }
}

The system hangs after a button press. This reproduces every time. Thanks for bringing this to our attention.

Mbed's Nordic port uses the app_timer module from their SDK. This module provides software timers on top of the RTC. This bug exposes some weird behaviour within the app_timer module; and we're working with Nordic to resolve this.

posted by Martin Kojtal 06 Jan 2015

posted by Jules Thuillier 31 Jan 2015

Hi,

https://github.com/mbedmicro/mbed/pull/932 is an ongoing attempt to address this issue. Please try it out.

posted by Rohit Grover 27 Feb 2015

rosco pekolt

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9 years, 11 months ago.