https://github.com/pilotak/nomutexcan

Mbed library for reading CAN bus in ISR
https://github.com/pilotak/nomutexcan

can can-bus mbed mbed-os-library mutex

Last synced: 3 months ago
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Mbed library for reading CAN bus in ISR

• Host: GitHub
• URL: https://github.com/pilotak/nomutexcan
• Owner: pilotak
• License: mit
• Created: 2019-09-27T11:01:02.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-09-27T11:21:13.000Z (over 6 years ago)
• Last Synced: 2025-07-10T04:33:00.626Z (11 months ago)
• Topics: can, can-bus, mbed, mbed-os-library, mutex
• Language: C++
• Homepage:
• Size: 1.95 KB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# NoMutexCAN

Standard mbed CAN library doesn't allow you to read messages in ISR. And when you try to use EventQueue (`can.attach(eQueue.event(canListen), CAN::RxIrq);`) it will give you `ISR overflow error` so the only chance is to override mutex, that's what this library do.

```cpp

#include "mbed.h"

#include "NoMutexCAN.h"

CircularBuffer queue;

NoMutexCAN can(PB_8, PB_9);

void canListen() {  // ISR

    CANMessage msg;

    if (can.read(msg)) {

        queue.push(msg);

    }

}

int main(void) {

    can.frequency(250000);

    can.mode(CAN::Normal);

    can.attach(&canListen, CAN::RxIrq);

    while (1) {

        while (!queue.empty()) {

            CANMessage msg;

            queue.pop(msg);

            printf("ID: %X\n", msg.id);

        }

    }

}

```