#define CONT PT_YIELD(&rf_pt);
#define RESET PT_RESTART(&rf_pt);
#define EXPECT(x) if (!(x)) { RESET; }

PT_THREAD(rf_receive())
{
    bool databit;
    PT_BEGIN(&rf_pt);

    // wait for first 10
    PT_WAIT_UNTIL(&rf_pt, (cur_bit == 0) && IS_VERY_LONG(cont_count));
    putc('B');

    LED_TOGGLE;

    PT_YIELD(&rf_pt);

    for (i = 0; i < 4; ++i) {
        // wait for 01
        EXPECT((cur_bit == 1) && IS_SHORT(cont_count));
        CONT;
        // wait for 10
        EXPECT((cur_bit == 0) && IS_SHORT(cont_count));
        CONT;
    }

    putc('P');

    // after preamble, 01
    EXPECT((cur_bit == 1) && IS_SHORT(cont_count));

    CONT;

    // first long now

    CONT;

    for (i = 0; i < BITS_TO_RECEIVE; ++i) {
        if (IS_SHORT(cont_count)) {
            DEBUG(putc('S'));
            CONT;
            if (IS_SHORT(cont_count) || (i == (BITS_TO_RECEIVE-1))) {
                databit = !cur_bit;
                if (databit)
                    putc('1');
                else
                    putc('0');
                CONT;
            } else {
                RESET;
            }
        } else if (IS_LONG(cont_count) || ((IS_VERY_LONG(cont_count)) && (i == (BITS_TO_RECEIVE-1)))) {
            DEBUG(putc('L'));
            databit = cur_bit;
            if (databit)
                putc('1');
            else
                putc('0');
            CONT;
        } else {
            RESET;
        }
    }

    putc('E');
    puts("\r\n");

    PT_END(&rf_pt);
}