case '6': tap->set_pins(1, 1, 0); break;
case '7': tap->set_pins(1, 1, 1); break;
case 'R': send_buf[send_offset++] = tap->tdo() ? '1' : '0'; break;
case '6': tap->set_pins(1, 1, 0); break;
case '7': tap->set_pins(1, 1, 1); break;
case 'R': send_buf[send_offset++] = tap->tdo() ? '1' : '0'; break;