MSP_MODE_FM_RADIO
msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
case MSP_MODE_FM_RADIO: p = "FM Radio"; break;
case MSP_MODE_FM_RADIO:
state->mode = MSP_MODE_FM_RADIO;
msp3400c_set_mode(client, MSP_MODE_FM_RADIO);