SR_BPSK_QPSK
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 0);
rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 1);