Arduino M0 Proでmbedのコードを動かす ref: http://qiita.com/toyowata/items/2b2e71928b86fd829771

main.cpp

#include "mbed.h"

DigitalOut myled(PA17);
Serial pc(PB22, PB23);

int main() {
    pc.printf("hello, mbed world.\n");
    while(1) {
        myled = 1;
        wait(0.2);
        myled = 0;
        wait(0.2);
    }
}