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rx331.c
/*
 *  Hamlib Tentec backend - RX331 description
 *  Copyright (c) 2010 by Berndt Josef Wulf
 *
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2 of
 *   the License, or (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <string.h>

#include "hamlib/rig.h"
#include "bandplan.h"
#include "serial.h"
#include "misc.h"
#include "num_stdio.h"
#include "token.h"

#include "rx331.h"

static const struct confparams rx331_cfg_params[] = {
      { TOK_RIGID, "receiver_id", "receiver ID", "receiver ID",
            "0", RIG_CONF_NUMERIC, { .n = { 0, 99, 1 } }
      },
      { RIG_CONF_END, NULL, }
};

#define RX331_MODES (RIG_MODE_FM|RIG_MODE_CW|RIG_MODE_SSB|RIG_MODE_DSB|\
                  RIG_MODE_AM|RIG_MODE_AMS)

#define RX331_FUNCS (RIG_FUNC_NB)

#define RX331_LEVELS (RIG_LEVEL_STRENGTH| \
                  RIG_LEVEL_RF|RIG_LEVEL_IF| \
                  RIG_LEVEL_NOTCHF|RIG_LEVEL_SQL| \
                  RIG_LEVEL_CWPITCH|RIG_LEVEL_AGC| \
                  RIG_LEVEL_ATT|RIG_LEVEL_PREAMP)

#define RX331_ANTS (RIG_ANT_1) 

#define RX331_PARMS (RIG_PARM_NONE)

#define RX331_VFO (RIG_VFO_A)

#define RX331_VFO_OPS (RIG_OP_TO_VFO|RIG_OP_FROM_VFO)

/* TODO: levels.. */
#define RX331_MEM_CAP { \
      .freq = 1,      \
      .mode = 1,      \
      .width = 1,     \
}


static int rx331_init(RIG *rig);
static int rx331_cleanup(RIG *rig);
static int rx331_set_conf(RIG *rig, token_t token, const char *val);
static int rx331_get_conf(RIG *rig, token_t token, char *val);
static int rx331_open(RIG *rig);
static int rx331_close(RIG *rig);
static int rx331_set_freq(RIG *rig, vfo_t vfo, freq_t freq);
static int rx331_get_freq(RIG *rig, vfo_t vfo, freq_t *freq);
static int rx331_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width);
static int rx331_get_mode(RIG *rig, vfo_t vfo, rmode_t *mode, pbwidth_t *width);
static int rx331_set_level(RIG *rig, vfo_t vfo, setting_t level, value_t val);
static int rx331_get_level(RIG *rig, vfo_t vfo, setting_t level, value_t *val);
static int rx331_vfo_op(RIG *rig, vfo_t vfo, vfo_op_t op);
static const char* rx331_get_info(RIG *rig);

/*
 * RX331 receiver capabilities.
 *
 * Protocol is documented at 
 *          http://radio.tentec.com/downloads/receivers/RX331
 *
 * TODO: from/to memory
 */
const struct rig_caps rx331_caps = {
.rig_model =  RIG_MODEL_RX331,
.model_name = "RX-331",
.mfg_name =  "Ten-Tec",
.version =  "0.1",
.copyright =  "LGPL",
.status =  RIG_STATUS_BETA,
.rig_type =  RIG_TYPE_RECEIVER,
.ptt_type =  RIG_PTT_NONE,
.dcd_type =  RIG_DCD_NONE,
.port_type =  RIG_PORT_SERIAL,
.serial_rate_min =  75,
.serial_rate_max =  38400,
.serial_data_bits =  8,
.serial_stop_bits =  1,
.serial_parity =  RIG_PARITY_NONE,
.serial_handshake =  RIG_HANDSHAKE_NONE,
.write_delay =  0,
.post_write_delay =  0,
.timeout =  400,
.retry =  3,

.has_get_func =  RX331_FUNCS,
.has_set_func =  RX331_FUNCS,
.has_get_level =  RX331_LEVELS,
.has_set_level =  RIG_LEVEL_SET(RX331_LEVELS),
.has_get_parm =  RX331_PARMS,
.has_set_parm =  RX331_PARMS,
.level_gran =  {},            /* FIXME: granularity */
.parm_gran =  {},
.ctcss_list =  NULL,
.dcs_list =  NULL,
.preamp =   { 10, RIG_DBLST_END },
.attenuator =   { 15, RIG_DBLST_END },
.max_rit =  Hz(0),
.max_xit =  Hz(0),
.max_ifshift =  kHz(2),
.targetable_vfo =  RIG_TARGETABLE_NONE,
.transceive =  RIG_TRN_OFF,
.vfo_ops =  RX331_VFO_OPS,
.bank_qty =   0,
.chan_desc_sz =  0,

.chan_list = {
      { 1, 100, RIG_MTYPE_MEM, RX331_MEM_CAP },
      RIG_CHAN_END,
},

.rx_range_list1 =  {
      {kHz(0),MHz(30),RX331_MODES,-1,-1,RX331_VFO,RX331_ANTS},
      RIG_FRNG_END,
},

.tx_range_list1 =  {
      RIG_FRNG_END,
},

.rx_range_list2 =  {
      {kHz(0),MHz(30),RX331_MODES,-1,-1,RX331_VFO,RX331_ANTS},
      RIG_FRNG_END,
},
.tx_range_list2 =  {
      RIG_FRNG_END,
},

.tuning_steps =  {
      {RX331_MODES,1},
      RIG_TS_END,
},

/* mode/filter list, remember: order matters! */
.filters =  {
      {RX331_MODES, kHz(3.2)},
      {RX331_MODES, Hz(100)},
      {RX331_MODES, kHz(16)},
      {RX331_MODES, 0},
      RIG_FLT_END,
},

.priv =  (void*)NULL,

.cfgparams = rx331_cfg_params,

.rig_init =   rx331_init,
.rig_cleanup= rx331_cleanup,
.rig_open =   rx331_open,
.rig_close =  rx331_close,
.set_conf =   rx331_set_conf,
.get_conf =   rx331_get_conf,
.set_freq =   rx331_set_freq,
.get_freq =   rx331_get_freq,
.set_mode =   rx331_set_mode,
.get_mode =   rx331_get_mode,
.set_level =  rx331_set_level,
.get_level =  rx331_get_level,
.vfo_op =     rx331_vfo_op,
.get_info =   rx331_get_info,

};

/*
 * Function definitions below
 */

#define BUFSZ 128

#define EOM "\015"      /* CR */

#define RX331_AM  '1'
#define RX331_FM  '2'
#define RX331_CW  '3'
#define RX331_CW1 '4'
#define RX331_ISB '5'
#define RX331_LSB '6'
#define RX331_USB '7'
#define RX331_SAM '8'

#define RX331_PREAMP_OFF      0x1
#define RX331_PREAMP_ON       0x2
#define RX331_ATT_OFF         0x1
#define RX331_ATT_ON          0x3

#define RX331_AGC_FAST        0x1
#define RX331_AGC_MEDIUM      0x2
#define RX331_AGC_SLOW        0x3
#define RX331_AGC_PROG        0x4

#define REPORT_FREQ           "TF"EOM
#define REPORT_MODEFILTER     "TDI"EOM
#define REPORT_FIRM           "V"EOM
#define REPORT_STRENGTH       "X"EOM
#define REPORT_AGC            "TM"EOM
#define REPORT_ATT            "TK"EOM
#define REPORT_PREAMP         "TK"EOM
#define REPORT_RF       "TA"EOM
#define REPORT_IF       "TP"EOM
#define REPORT_SQL            "TQ"EOM
#define REPORT_CWPITCH        "TB"EOM
#define REPORT_NOTCHF         "TN"EOM

/*
 * rx331_transaction
 * read exactly data_len bytes
 * We assume that rig!=NULL, rig->state!= NULL, data!=NULL, data_len!=NULL
 * Otherwise, you'll get a nice seg fault. You've been warned!
 */
static int rx331_transaction(RIG *rig, const char *cmd, int cmd_len, char *data, int *data_len)
{
      int rig_id;
      int retval;
      char str[BUFSZ];
      struct rig_state *rs;
      struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;

      rs = &rig->state;

      serial_flush(&rs->rigport);

      num_snprintf(str, BUFSZ, "$%i%s", priv->receiver_id, cmd);
      retval = write_block(&rs->rigport, str, strlen(str));

      if (retval != RIG_OK)
            return retval;

      /* no data expected, TODO: flush input? */
      if (!data || !data_len)
            return RIG_OK;

      retval = read_string(&rs->rigport, data, BUFSZ, EOM, 1);

      if (retval < 0)
            return retval;

      sscanf(data + 1,"%i%s", &rig_id, data);

      if(rig_id != priv->receiver_id)
            return -RIG_EPROTO;

      *data_len = retval;

      return RIG_OK;
}

/*
 * rx331_init:
 * Basically, it just sets up *priv
 */
int rx331_init(RIG *rig)
{
      struct rx331_priv_data *priv;

      priv = (struct rx331_priv_data*)malloc(sizeof(struct rx331_priv_data));

      if (!priv) {
            /* whoops! memory shortage! */
            return -RIG_ENOMEM;
      }

      memset(priv, 0, sizeof(struct rx331_priv_data));

      /*
       * set arbitrary initial status
       */
      rig->state.priv = (rig_ptr_t)priv;

      return RIG_OK;
}

/*
 * Tentec generic rx331_cleanup routine
 * the serial port is closed by the frontend
 */
int rx331_cleanup(RIG *rig)
{
  if (rig->state.priv)
    free(rig->state.priv);

  rig->state.priv = NULL;

  return RIG_OK;
}

int rx331_set_conf(RIG *rig, token_t token, const char *val)
{
  struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;

  switch(token) {
    case TOK_RIGID:
      priv->receiver_id = atoi(val);
      break;
    default:
      return -RIG_EINVAL;
  }
  return RIG_OK;
}

int rx331_get_conf(RIG *rig, token_t token, char *val)
{
      struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;

      switch(token) {
            case TOK_RIGID:
                  sprintf(val, "%d", priv->receiver_id);
                  break;
            default:
                  return -RIG_EINVAL;
      }
      return RIG_OK;
}

int rx331_open(RIG *rig)
{
  rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);

  if (!rig)
    return -RIG_EINVAL;

  return RIG_OK;
}

/*
 * rig_close
 */
int rx331_close(RIG *rig)
{
  rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);

  if (!rig)
    return -RIG_EINVAL;

  return RIG_OK;
}

int rx331_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
{
      struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;

      struct rig_state *rs = &rig->state;
      int freq_len, retval;
      char freqbuf[16];

      freq_len = num_sprintf(freqbuf, "$%iF%.6f" EOM,
            priv->receiver_id, freq/1e6);
      
      retval = write_block(&rs->rigport, freqbuf, freq_len);

      return retval;
}

/*
 * rx331_get_freq
 * Assumes rig!=NULL, freq!=NULL
 */
int rx331_get_freq(RIG *rig, vfo_t vfo, freq_t *freq)
{
      char buf[BUFSZ];
      int buf_len;
      int retval;
      double f;

      retval = rx331_transaction(rig, REPORT_FREQ, strlen(REPORT_FREQ),
                              buf, &buf_len);

      if (retval < 0)
            return retval;

      if (buf_len < 2 || buf[0] != 'F' || num_sscanf(buf+1, "%lf", &f) != 1)
            return -RIG_EPROTO;
    
      *freq = f*1e6;

      return RIG_OK;
}

/*
 * rx331_set_mode
 * Assumes rig!=NULL
 */
int rx331_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
{
      struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;
      struct rig_state *rs = &rig->state;
      char dmode;
      int mdbuf_len, retval;
      char mdbuf[32];

      switch (mode) {
            case RIG_MODE_USB:      dmode = RX331_USB; break;
            case RIG_MODE_LSB:      dmode = RX331_LSB; break;
            case RIG_MODE_CW:       dmode = RX331_CW; break;
            case RIG_MODE_FM:       dmode = RX331_FM; break;
            case RIG_MODE_AM:       dmode = RX331_AM; break;
            case RIG_MODE_AMS:      dmode = RX331_SAM; break;
            case RIG_MODE_DSB:      dmode = RX331_ISB; break;
            default:
                  rig_debug(RIG_DEBUG_ERR,
                              "%s: unsupported mode %d\n",
                                          __func__, mode);
                  return -RIG_EINVAL;
      }

      if (width == RIG_PASSBAND_NORMAL)
                  width = rig_passband_normal(rig, mode);

      /*
      * Set DETECTION MODE and IF FILTER
      */
      mdbuf_len = num_sprintf(mdbuf,  "$%iD%cI%.02f" EOM, priv->receiver_id,
                                    dmode, (float)width/1e3);

      retval = write_block(&rs->rigport, mdbuf, mdbuf_len);

      return retval;
}

/*
 * rx331_get_mode
 * Assumes rig!=NULL, mode!=NULL
 */
int rx331_get_mode(RIG *rig, vfo_t vfo, rmode_t *mode, pbwidth_t *width)
{
    char buf[BUFSZ];
    int buf_len;
    int retval;
    double f;

    retval = rx331_transaction(rig, REPORT_MODEFILTER,
            strlen(REPORT_MODEFILTER), buf, &buf_len);
    if (retval < 0)
        return retval;

    if (buf_len < 4 || buf[0] != 'D' || buf[2] != 'I')
        return -RIG_EPROTO;
    
      switch (buf[1]) {
        case RX331_USB: *mode = RIG_MODE_USB; break;
        case RX331_LSB: *mode = RIG_MODE_LSB; break;
        case RX331_CW1:
        case RX331_CW:  *mode = RIG_MODE_CW; break;
        case RX331_FM:  *mode = RIG_MODE_FM; break;
        case RX331_AM:  *mode = RIG_MODE_AM; break;
        case RX331_SAM: *mode = RIG_MODE_AMS; break;
        case RX331_ISB: *mode = RIG_MODE_DSB; break;
            default:
                  rig_debug(RIG_DEBUG_ERR,
                        "%s: unknown mode '%c'\n", __func__, buf[1]);
                  return -RIG_EPROTO;
      }

      if (num_sscanf(buf+3, "%lf", &f) != 1)
            return -RIG_EPROTO;
    
      *width = f*1e3;

      return RIG_OK;
}


/*
 * rx331_set_level
 * Assumes rig!=NULL
 * cannot support PREAMP and ATT both at same time (make sense though)
 */
int rx331_set_level(RIG *rig, vfo_t vfo, setting_t level, value_t val)
{
      struct rx331_priv_data *priv = (struct rx331_priv_data*)rig->state.priv;
      struct rig_state *rs = &rig->state;
      int cmd_len, retval=RIG_OK;
      char cmdbuf[32];

      switch (level) {
      case RIG_LEVEL_ATT:
            cmd_len = sprintf(cmdbuf, "$%iK%i" EOM,
                        priv->receiver_id,
                        val.i ? RX331_ATT_ON : RX331_ATT_OFF);
        break;

      case RIG_LEVEL_PREAMP:
            cmd_len = sprintf(cmdbuf, "$%iK%i" EOM,
                        priv->receiver_id,
                        val.i ? RX331_PREAMP_ON : RX331_PREAMP_OFF);
        break;

      case RIG_LEVEL_AGC:
            switch(val.i) {
                  case RIG_AGC_FAST: val.i = RX331_AGC_FAST; break;
                  case RIG_AGC_MEDIUM:  val.i = RX331_AGC_MEDIUM; break;
                  case RIG_AGC_SLOW:  val.i = RX331_AGC_SLOW; break;
                  case RIG_AGC_USER:  val.i = RX331_AGC_PROG; break;
                  default:
                        rig_debug(RIG_DEBUG_ERR,
                              "%s: Unsupported set_level %d\n",
                              __func__, val.i);
                        return -RIG_EINVAL;
            }

            cmd_len = sprintf(cmdbuf, "$%iM%i" EOM,
                              priv->receiver_id,val.i);
            break;

      case RIG_LEVEL_RF:
            cmd_len = sprintf(cmdbuf, "$%iA%d" EOM, priv->receiver_id,
                              120-(int)(val.f*120));
        break;
            
    case RIG_LEVEL_SQL:
            cmd_len = sprintf(cmdbuf, "$%iQ%d" EOM, priv->receiver_id,
                        120-(int)(val.f*120));
        break;

    case RIG_LEVEL_NOTCHF:
            cmd_len = num_sprintf(cmdbuf, "$%iN%f" EOM, priv->receiver_id,
                        ((float)val.i)/1e3);
        break;

    case RIG_LEVEL_IF:
            cmd_len = num_sprintf(cmdbuf, "$%iP%f" EOM, priv->receiver_id,
                        ((float)val.i)/1e3);
        break;

    case RIG_LEVEL_CWPITCH:
        /* only in CW mode */
            cmd_len = num_sprintf(cmdbuf, "$%iB%f" EOM, priv->receiver_id,
                        ((float)val.i)/1e3);
        break;

      default:
            rig_debug(RIG_DEBUG_ERR,"%s: Unsupported set_level %d\n",
                __func__, level);
            return -RIG_EINVAL;
      }

    retval = write_block(&rs->rigport, cmdbuf, cmd_len);
    return retval;
}


/*
 * rx331_get_level
 * Assumes rig!=NULL, val!=NULL
 */
int rx331_get_level(RIG *rig, vfo_t vfo, setting_t level, value_t *val)
{
      int retval, lvl_len;
      char lvlbuf[BUFSZ];

      switch (level) {
      case RIG_LEVEL_STRENGTH:
            retval = rx331_transaction (rig, REPORT_STRENGTH,
                strlen(REPORT_STRENGTH), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 2 || lvlbuf[0] != 'X') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            // Range is 0-120 covering the 120dB range of the receiver
            
            if(num_sscanf(lvlbuf+1,"%d",&val->i) != 1)
                  return -RIG_EPROTO;

            val->i = val->i - 120;
            break;

      case RIG_LEVEL_AGC:
            retval = rx331_transaction (rig, REPORT_AGC,
                strlen(REPORT_AGC), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'M') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            switch(atoi(lvlbuf+1)) {
                  case RX331_AGC_FAST:  val->i = RIG_AGC_FAST; break;
                  case RX331_AGC_MEDIUM: val->i = RIG_AGC_MEDIUM; break;
                  case RX331_AGC_SLOW: val->i = RIG_AGC_SLOW; break;
                  case RX331_AGC_PROG: val->i = RIG_AGC_USER; break;
                  default:
                        rig_debug(RIG_DEBUG_ERR,
                              "%s:Unsupported get_level %d\n",
                              __func__, level);
                        return -RIG_EINVAL;
            }
            break;
      case RIG_LEVEL_ATT:
            retval = rx331_transaction (rig, REPORT_ATT,
                strlen(REPORT_ATT), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'K') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%i",&val->i) != 1)
                  return -RIG_EPROTO;

            val->i = (val->i == RX331_ATT_ON);
            break;
      case RIG_LEVEL_PREAMP:
            retval = rx331_transaction (rig, REPORT_PREAMP,
                strlen(REPORT_PREAMP), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'K') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%i",&val->i) != 1)
                  return -RIG_EPROTO;

            val->i = (val->i == RX331_PREAMP_ON);
            break;
      case RIG_LEVEL_RF:
            retval = rx331_transaction (rig, REPORT_RF,
                strlen(REPORT_RF), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'A') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%d",&val->i) != 1)
                  return -RIG_EPROTO;

            val->f = 1.0 - (float)(val->i / 120.0);

            break;
      case RIG_LEVEL_IF:
            retval = rx331_transaction (rig, REPORT_IF,
                strlen(REPORT_IF), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'P') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%f",&val->f) != 1)
                  return -RIG_EPROTO;

            val->i = (int)(val->f * 1000.0);

            break;
      case RIG_LEVEL_SQL:
            retval = rx331_transaction (rig, REPORT_SQL,
                strlen(REPORT_SQL), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'Q') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%d", &val->i) != 1)
                  return -RIG_EPROTO;

            val->f = 1.0 - (val->i/ 120.0);

            break;
      case RIG_LEVEL_CWPITCH:
            retval = rx331_transaction (rig, REPORT_CWPITCH,
                strlen(REPORT_CWPITCH), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'B') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%f", &val->f) != 1)
                  return -RIG_EPROTO;

            val->i = (val->f *  1000.0);

            break;
      case RIG_LEVEL_NOTCHF:
            retval = rx331_transaction (rig, REPORT_NOTCHF,
                strlen(REPORT_NOTCHF), lvlbuf, &lvl_len);

            if (retval != RIG_OK)
                  return retval;

            if (lvl_len < 0 || lvlbuf[0] != 'N') {
                  rig_debug(RIG_DEBUG_ERR,"%s: wrong answer"
                              "len=%d\n", __func__, lvl_len);
                  return -RIG_EPROTO;
            }

            if(num_sscanf(lvlbuf+1,"%f", &val->f) != 1)
                  return -RIG_EPROTO;

            val->i = (val->f *  1000.0);

            break;
      default:
            rig_debug(RIG_DEBUG_ERR,"%s: Unsupported get_level %d\n",
                __func__, level);
            return -RIG_EINVAL;
      }

      return RIG_OK;
}

/*
 * rx331_vfo_op
 * Assumes rig!=NULL
 */
int rx331_vfo_op(RIG *rig, vfo_t vfo, vfo_op_t op)
{
    return -RIG_ENIMPL;
}

/*
 * rx331_get_info
 * Assumes rig!=NULL
 */
const char *rx331_get_info(RIG *rig)
{
      static char buf[BUFSZ]; /* FIXME: reentrancy */
      int firmware_len, retval;

      retval = rx331_transaction (rig, REPORT_FIRM, strlen(REPORT_FIRM),
                              buf, &firmware_len);

      if ( (retval != RIG_OK) || (firmware_len > 10) )  {
            rig_debug(RIG_DEBUG_ERR,"%s: ack NG, len=%d\n",
                  __func__, firmware_len);
            return NULL;
      }

      return buf;
}


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