Transceivert52M: Add option for baseband frequency offset
Allow command line setting of the DSP frequency in UHD. All channels will be tuned with the same offset. Dual-channel tuning with the B210, which uses a single LO, will override the command line offset value and set the DSP frequency automatically. Signed-off-by: Thomas Tsou <tom@tsou.cc>
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3ebc772dc2
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8e17df7374
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@ -257,7 +257,7 @@ private:
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*/
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class uhd_device : public RadioDevice {
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public:
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uhd_device(size_t sps, size_t chans, bool diversity);
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uhd_device(size_t sps, size_t chans, bool diversity, double offset);
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~uhd_device();
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int open(const std::string &args, bool extref);
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@ -324,6 +324,7 @@ private:
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double tx_gain_min, tx_gain_max;
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double rx_gain_min, rx_gain_max;
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double offset;
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std::vector<double> tx_gains, rx_gains;
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std::vector<double> tx_freqs, rx_freqs;
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@ -390,7 +391,7 @@ void uhd_msg_handler(uhd::msg::type_t type, const std::string &msg)
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}
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}
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uhd_device::uhd_device(size_t sps, size_t chans, bool diversity)
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uhd_device::uhd_device(size_t sps, size_t chans, bool diversity, double offset)
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: tx_gain_min(0.0), tx_gain_max(0.0),
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rx_gain_min(0.0), rx_gain_max(0.0),
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tx_spp(0), rx_spp(0),
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@ -399,6 +400,7 @@ uhd_device::uhd_device(size_t sps, size_t chans, bool diversity)
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{
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this->sps = sps;
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this->chans = chans;
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this->offset = offset;
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this->diversity = diversity;
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}
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@ -980,11 +982,12 @@ uhd::tune_request_t uhd_device::select_freq(double freq, size_t chan, bool tx)
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std::vector<double> freqs;
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uhd::tune_request_t treq(freq);
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if (chans == 1)
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return treq;
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else if ((dev_type == UMTRX) && (chans == 2))
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return treq;
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else if ((dev_type != B210) || (chans > 2) || (chan > 1)) {
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if ((chans == 1) || ((chans == 2) && dev_type == UMTRX)) {
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if (offset == 0.0)
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return treq;
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return uhd::tune_request_t(freq, offset);
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} else if ((dev_type != B210) || (chans > 2) || (chan > 1)) {
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LOG(ALERT) << chans << " channels unsupported";
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return treq;
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}
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@ -1029,6 +1032,9 @@ bool uhd_device::set_freq(double freq, size_t chan, bool tx)
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}
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LOG(INFO) << "\n" << tres.to_pp_string() << std::endl;
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if ((chans == 1) || ((chans == 2) && dev_type == UMTRX))
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return true;
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/* Manual RF policy means we intentionally tuned with a baseband
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* offset for dual-channel purposes. Now retune the other channel
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* with the opposite corresponding frequency offset
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@ -1324,7 +1330,8 @@ std::string smpl_buf::str_code(ssize_t code)
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}
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}
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RadioDevice *RadioDevice::make(size_t sps, size_t chans, bool diversity)
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RadioDevice *RadioDevice::make(size_t sps, size_t chans,
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bool diversity, double offset)
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{
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return new uhd_device(sps, chans, diversity);
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return new uhd_device(sps, chans, diversity, offset);
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}
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@ -68,6 +68,7 @@ struct trx_config {
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bool extref;
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bool filler;
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bool diversity;
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double offset;
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};
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ConfigurationTable gConfig;
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@ -178,6 +179,7 @@ bool trx_setup_config(struct trx_config *config)
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ost << " External Reference...... " << refstr << std::endl;
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ost << " C0 Filler Table......... " << fillstr << std::endl;
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ost << " Diversity............... " << divstr << std::endl;
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ost << " Tuning offset........... " << config->offset << std::endl;
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std::cout << ost << std::endl;
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return true;
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@ -283,7 +285,8 @@ static void print_help()
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" -x Enable external 10 MHz reference\n"
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" -s Samples-per-symbol (1 or 4)\n"
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" -c Number of ARFCN channels (default=1)\n"
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" -f Enable C0 filler table\n",
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" -f Enable C0 filler table\n"
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" -o Set baseband frequency offset (default=auto)\n",
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"EMERG, ALERT, CRT, ERR, WARNING, NOTICE, INFO, DEBUG");
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}
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@ -297,8 +300,9 @@ static void handle_options(int argc, char **argv, struct trx_config *config)
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config->extref = false;
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config->filler = false;
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config->diversity = false;
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config->offset = 0.0;
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while ((option = getopt(argc, argv, "ha:l:i:p:c:dxfs:")) != -1) {
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while ((option = getopt(argc, argv, "ha:l:i:p:c:dxfo:s:")) != -1) {
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switch (option) {
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case 'h':
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print_help();
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@ -328,6 +332,9 @@ static void handle_options(int argc, char **argv, struct trx_config *config)
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case 'f':
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config->filler = true;
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break;
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case 'o':
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config->offset = atof(optarg);
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break;
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case 's':
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config->sps = atoi(optarg);
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if ((config->sps != 1) && (config->sps != 4)) {
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@ -366,7 +373,8 @@ int main(int argc, char *argv[])
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srandom(time(NULL));
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/* Create the low level device object */
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usrp = RadioDevice::make(config.sps, config.chans, config.diversity);
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usrp = RadioDevice::make(config.sps, config.chans,
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config.diversity, config.offset);
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type = usrp->open(config.dev_args, config.extref);
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if (type < 0) {
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LOG(ALERT) << "Failed to create radio device" << std::endl;
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@ -38,7 +38,7 @@ class RadioDevice {
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enum RadioInterfaceType { NORMAL, RESAMP_64M, RESAMP_100M, DIVERSITY };
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static RadioDevice *make(size_t sps, size_t chans = 1,
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bool diversity = false);
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bool diversity = false, double offset = 0.0);
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/** Initialize the USRP */
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virtual int open(const std::string &args = "", bool extref = false)=0;
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