File content as of revision 0:9edfcca7cd25:

#include "mbed.h"
#include "diags.h"
#include "CAN.h"

Ticker ticker;

// CAN_RS pin at Philips PCA82C250 can bus controller.
// activate transceiver by pulling this pin to GND.
// (Rise and fall slope controlled by resistor R_s)
// (+5V result in tranceiver standby mode)
// For further information see datasheet page 4
DigitalOut can_Pca82c250SlopePin(p28);

// We use can on mbed pins 29(CAN_TXD) and 30(CAN_RXD).
CAN can(p30, p29);

int    can_cnt=0;

/******************************************/
/*                                        */
/*    Can Bus Tests                       */
/*                                        */
/*                                        */
/*                                        */
/*                                        */
/******************************************/
void send() {
    static char counter = 0;
    if (can.write(CANMessage(0x200, &counter, 1))) {
        printf("CanTx--> id: 0x200  dlc: 1  data: %x\n\r", counter);
        counter++;
    } else {
        printf("CanTx--> id: 0x200  dlc: 1  data: %x ERROR\n\r", counter);
        can.reset();
    }
    if(can_cnt==0){
        led_on(3);
        can_cnt=1;
    } else {
        led_off(3);
        can_cnt=0;
    }
    // toggle led1 after every transmission
}
void test_can(int loop)
{
    // 500kbit/s
    can.frequency(500000);
    // activate external can transceiver
    can_Pca82c250SlopePin = 0;
    can_cnt=loop;
    // every 500ms
    ticker.attach(&send, 0.5);
    
    printf("CAN message ticker started\n\r");
}