cantoo.ino

#include <string.h>
#include <Adafruit_ZeroCAN.h>

Adafruit_ZeroCAN can{};

void setup() {
    Serial.begin(9600); // open the serial port at 9600 bps:

    digitalWrite(PIN_CAN_STANDBY, false); // turn off STANDBY
    can.begin(1000000, true, false);
    pinMode(A0, INPUT_PULLUP);
    pinMode(A1, INPUT_PULLUP);
    pinMode(A2, INPUT_PULLUP);
    pinMode(13, OUTPUT);
}

Adafruit_ZeroCAN::Message m{0xaa, false, false, 8, {}};

void loop() {

    for(int j=0; ; j++) {
digitalWrite(13, j & 1);
        for(int i = 0; i<64; i++) {
            memset(&m.data, 0, sizeof(m.data));
            m.data[i/8] = 1<<(i % 8);

            auto state = can.busState();
            if(state != Adafruit_ZeroCAN::ERROR_ACTIVE) {
                Serial.print("bus state ");    
                Serial.println((int)state);
            }

            if(state == Adafruit_ZeroCAN::BUS_OFF) {
                can.restart();
            }

            can.send(m);
            delay(1);
        }
    }
}