File content as of revision 1:32f484ba74a2:

#include "mbed.h"

CAN can(p30,p29);
Ticker ticker;
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

char can_data1[2]= {0,0};
int data1=0;
CANMessage msg1;
int y;
void can1()
{
    can_data1[0]=data1>>8;
    can_data1[1]=data1&255;
    if(can.write(CANMessage(1,can_data1,2))) {
        led1 =1;
        led2=0;
        printf("can1 send\r\n");
    } else {
        led1=0;
        led2=1;
        printf("can1 no send\r\n");
    }
    if (can1.read(msg1))
    {
        if (msg1.id == 2)
        {
            y = (short)((msg1.data[0] << 8) | msg1.data[1]);
            if(y==1000){
                printf("get responese from can2\r\n");
                data1++;
                if(data1>1000)data1=1000;
            }
        }
    }
}

int main()
{
    can1.frequency(1000000);
    ticker.attach(&can1,0.001);
}