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Adding extra control for the AD936x custom source external mixer

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This commit is contained in:
Javier Arribas
2022-08-30 15:28:18 +02:00
parent f20a696f8a
commit 0c5d38145f
6 changed files with 138 additions and 71 deletions
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108
src/algorithms/signal_source/libs/ad936x_iio_custom.cc
View File

@@ -410,7 +410,9 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
double rf_gain_rx1_,
bool enable_ch0,
bool enable_ch1,
long long freq_2ch)
long long freq_2ch,
double lo_attenuation_db_,
bool high_side_lo_)
{
if (check_device() == false) return false;
@@ -510,17 +512,32 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
if (enable_ch1 == true and enable_ch0 == true and freq_ != freq_2ch)
{
std::cout << "Two channels enabled with different frequencies, enabling the external RF transverter board:\n";
long long int delta_freq_hz = freq_2ch - freq_;
if (delta_freq_hz < 0)
long long int lo_freq_hz = 0;
if (high_side_lo_ == false)
{
std::cout << "Configuration problem: 2nd channel frequency is " << freq_2ch << " [Hz], must be higher than main channel (" << freq_ << " [Hz])\n";
return false;
std::cout << "Using LOW SIDE Local Oscillator (F_RF > F_LO)\n";
lo_freq_hz = freq_2ch - freq_;
if (lo_freq_hz < 0)
{
std::cout << "Configuration problem: 2nd channel frequency is " << freq_2ch << " [Hz], must be higher than main channel (" << freq_ << " [Hz])\n";
return false;
}
}
else
{
std::cout << "Using HIGH SIDE Local Oscillator (F_RF < F_LO), consider baseband spectrum inversion.\n";
lo_freq_hz = freq_2ch + freq_;
if (lo_freq_hz < 0)
{
std::cout << "Configuration problem: 2nd channel frequency is " << freq_2ch << " [Hz], must be higher than main channel (" << freq_ << " [Hz])\n";
return false;
}
}
std::cout << "Configuring DDS Local Oscillator generation. LO Freq. is " << delta_freq_hz << " [Hz]\n";
std::cout << "Configuring DDS Local Oscillator generation. LO Freq. is " << lo_freq_hz << " [Hz]\n";
PlutoTxEnable(true);
config_ad9361_dds(delta_freq_hz,
0,
config_ad9361_dds(lo_freq_hz,
lo_attenuation_db_,
0,
0.9,
0,
@@ -532,6 +549,30 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
PlutoTxEnable(false); //power down the TX LO to reduce interferences
}
int set_filter_ret = ad9361_set_bb_rate_custom_filter_auto(phy, sample_rate_sps);
if (set_filter_ret != 0)
{
std::cout << "Warning: Unable to set AD936x RX filter parameters!\n";
}
//testing: set manual RX filter chain
// unsigned long RX_analog_bb_lpf_stop_hz = 1000000;
// unsigned long TX_analog_bb_lpf_stop_hz = 1000000;
//
// unsigned long FIR_lpf_passband_hz = 1000000;
// unsigned long FIR_lpf_stopband_hz = 1200000;
// int set_filter_ret = ad9361_set_bb_rate_custom_filter_manual(phy,
// sample_rate_sps,
// FIR_lpf_passband_hz,
// FIR_lpf_stopband_hz,
// RX_analog_bb_lpf_stop_hz,
// TX_analog_bb_lpf_stop_hz);
// if (set_filter_ret != 0)
// {
// std::cout << "Warning: Unable to set AD936x RX filter parameters!\n";
// }
if (enable_ch0 == true)
{
n_channels++;
@@ -555,12 +596,12 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
no_errors = false;
}
ret = iio_channel_attr_write_longlong(phy_ch, "rf_bandwidth", bandwidth_);
if (ret < 0)
{
std::cerr << "Warning: rf_bandwidth write returned: " << ret << "\n";
no_errors = false;
}
// ret = iio_channel_attr_write_longlong(phy_ch, "rf_bandwidth", bandwidth_);
// if (ret < 0)
// {
// std::cerr << "Warning: rf_bandwidth write returned: " << ret << "\n";
// no_errors = false;
// }
long long set_rf_bw;
ret = iio_channel_attr_read_longlong(phy_ch, "rf_bandwidth", &set_rf_bw);
@@ -605,12 +646,24 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
no_errors = false;
}
ret = iio_channel_attr_write_longlong(phy_ch, "rf_bandwidth", bandwidth_);
// ret = iio_channel_attr_write_longlong(phy_ch, "rf_bandwidth", bandwidth_);
// if (ret < 0)
// {
// std::cerr << "Warning: rf_bandwidth write returned: " << ret << "\n";
// no_errors = false;
// }
long long set_rf_bw;
ret = iio_channel_attr_read_longlong(phy_ch, "rf_bandwidth", &set_rf_bw);
if (ret < 0)
{
std::cerr << "Warning: rf_bandwidth write returned: " << ret << "\n";
std::cerr << "Warning: rf_bandwidth read returned: " << ret << "\n";
no_errors = false;
}
else
{
std::cerr << "Info: rf_bandwidth read returned: " << set_rf_bw << " Hz \n";
}
if (setRXGain(1, gain_mode_rx1_, rf_gain_rx1_) == false)
{
@@ -619,29 +672,6 @@ bool ad936x_iio_custom::init_config_ad9361_rx(long long bandwidth_,
}
}
int set_filter_ret = ad9361_set_bb_rate_custom_filter_auto(phy, sample_rate_sps);
if (set_filter_ret != 0)
{
std::cout << "Warning: Unable to set AD936x RX filter parameters!\n";
}
//testing: set manual RX filter chain
// unsigned long RX_analog_bb_lpf_stop_hz = 1000000;
// unsigned long TX_analog_bb_lpf_stop_hz = 1000000;
//
// unsigned long FIR_lpf_passband_hz = 1000000;
// unsigned long FIR_lpf_stopband_hz = 1200000;
// int set_filter_ret = ad9361_set_bb_rate_custom_filter_manual(phy,
// sample_rate_sps,
// FIR_lpf_passband_hz,
// FIR_lpf_stopband_hz,
// RX_analog_bb_lpf_stop_hz,
// TX_analog_bb_lpf_stop_hz);
// if (set_filter_ret != 0)
// {
// std::cout << "Warning: Unable to set AD936x RX filter parameters!\n";
// }
std::cout << "AD936x Front-end configuration summary: \n";
std::cout << "RF frequency tunned in AD936x: " << freq_ << " [Hz]\n";
std::cout << "Baseband sampling frequency: " << sample_rate_sps << " [SPS]\n";

4
src/algorithms/signal_source/libs/ad936x_iio_custom.h
View File

@@ -53,7 +53,9 @@ public:
double rf_gain_rx1_,
bool enable_ch0,
bool enable_ch1,
long long freq_2ch);
long long freq_2ch,
double lo_attenuation_db_,
bool high_side_lo_);
bool calibrate(int ch, double bw_hz);