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Merge pull request #18 from nqrduck/5-make-tx-path-selectable

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Make TX path selectable.
Works with LimeSDR USB, though the calibration is significantly different for the different channels. So if used with the same calibration parameters there are a lot of sidebands.
This commit is contained in:
Julia P 2024-02-12 10:37:09 +01:00 committed by GitHub
commit 4a5adc4838
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GPG key ID: B5690EEEBB952194
2 changed files with 172 additions and 81 deletions
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240
src/limedriver.cpp
View file

@ -14,6 +14,9 @@ h5c++ -shlib limedriver.cpp -std=c++11 -lLimeSuite -o limedriver
*/
#include "limedriver.h"
#include <H5PredType.h>
#include <lime/LimeSuite.h>
#include <vector>
using namespace std;
@ -91,6 +94,26 @@ inline bool file_exists(const std::string &name) {
return (stat(name.c_str(), &buffer) == 0);
}
std::vector<string> getDeviceList() {
// Get the list of available devices
int n = LMS_GetDeviceList(NULL);
lms_info_str_t list[n];
LMS_GetDeviceList(list);
if (n < 0) {
std::cout << "Error: " << n << std::endl;
}
std::vector<string> deviceList(n);
for (int i = 0; i < n; i++) {
deviceList[i] = list[i];
}
return deviceList;
}
// Custom function to read back the gain of the RX/TX channels. The API function
// GetGaindB has to be avoided, as it also modifies the gain, which is useless
// and dangerous..
@ -170,6 +193,7 @@ int GetGainRXTX(int *RXgain, int *TXgain) {
std::vector<Config2HDFattr_t> getHDFAttributes(LimeConfig_t &LimeCfg) {
std::vector<Config2HDFattr_t> HDFattr = {
{"sra", "SampleRate [Hz]", H5::PredType::IEEE_F32LE, &LimeCfg.srate, 1},
{"chn", "Channel", H5::PredType::NATIVE_INT, &LimeCfg.channel, 1},
{"lof", "LO Frequency [Hz]", H5::PredType::IEEE_F32LE, &LimeCfg.frq, 1},
{"rlp", "RX LowPass BW [Hz]", H5::PredType::IEEE_F32LE, &LimeCfg.RX_LPF,
1},
@ -375,6 +399,7 @@ LimeConfig_t initializeLimeConfig(int Npulses) {
// modification!
LimeCfg.srate = 30.72e6; // sample rate of the IF DAC/ADC
LimeCfg.channel = 0; // channel to use,
LimeCfg.frq = 50e6; // LO carrier frequency
LimeCfg.RX_gain = 20; // total gain of the receiver
LimeCfg.TX_gain = 30; // total gain of the transmitter
@ -514,6 +539,41 @@ int parseArguments(int argc, char **argv, LimeConfig_t &LimeCfg,
*/
// Checking for dump flag
bool dumpFlag = false;
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--dump") == 0) {
dumpFlag = true;
}
}
// If dump flag is set, dump the config and exit
if (dumpFlag) {
dumpConfig(HDFattrVector);
std::exit(0);
}
// Checking for devices flag
bool devicesFlag = false;
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--devices") == 0) {
devicesFlag = true;
}
}
// If devices flag is set, list the devices and exit
if (devicesFlag) {
std::vector<string> devices = getDeviceList();
for (auto &device : devices) {
std::cout << device << std::endl;
}
std::exit(0);
}
size_t no_of_attr = HDFattrVector.size();
// iterate through arguments to parse eventual user input
@ -531,7 +591,13 @@ int parseArguments(int argc, char **argv, LimeConfig_t &LimeCfg,
if (argv[ii_arg][0] == '-') {
if ((strlen(argv[ii_arg] + 1) != 3) && (attr2read == 0)) {
// If it is not a valid argument and we are not in the middle of
// reading an attribute, print an error message - unless the argument is
// --help, in which case we just print the permitted arguments below
if (!strcmp(argv[ii_arg], "--help") == 0) {
cout << "Invalid argument " << ii_arg << ": " << argv[ii_arg] << endl;
}
parse_prob = true;
continue;
}
@ -644,9 +710,24 @@ int parseArguments(int argc, char **argv, LimeConfig_t &LimeCfg,
parse_prob = true;
}
if (parse_prob) {
// check if --help was passed
bool helpFlag = false;
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--help") == 0) {
helpFlag = true;
}
}
if (!helpFlag) {
cout << "Exiting due to problem with provided arguments! Valid arguments "
"are (exept -///, which cannot be set by the user):"
"are (except -///, which cannot be set by the user):"
<< endl;
}
// TODO: More help, and a more elegant way to print the help
string datatype;
for (int ii_attr = 0; ii_attr < no_of_attr; ii_attr++) {
@ -739,18 +820,14 @@ int run_experiment(LimeConfig_t LimeCfg,
}
// Find devices
int n;
lms_info_str_t list[8]; // should be large enough to hold all detected devices
if ((n = LMS_GetDeviceList(list)) <
0) // NULL can be passed to only get number of devices
error();
std::vector<string> list = getDeviceList();
cout << "Devices found: " << n << endl; // print number of devices
if (n < 1)
cout << "Devices found: " << list.size() << endl; // print number of devices
if (list.size() < 1)
return -1;
// open the first device
if (LMS_Open(&device, list[0], NULL))
if (LMS_Open(&device, list[0].c_str(), NULL))
error();
/*
@ -768,20 +845,22 @@ int run_experiment(LimeConfig_t LimeCfg,
*/
// Get number of channels
if ((n = LMS_GetNumChannels(device, LMS_CH_RX)) < 0)
int num_rx_channels, num_tx_channels;
if ((num_rx_channels = LMS_GetNumChannels(device, LMS_CH_RX)) < 0)
error();
cout << "Number of RX channels: " << n << endl;
if ((n = LMS_GetNumChannels(device, LMS_CH_TX)) < 0)
cout << "Number of RX channels: " << num_rx_channels << endl;
if ((num_tx_channels = LMS_GetNumChannels(device, LMS_CH_TX)) < 0)
error();
cout << "Number of TX channels: " << n << endl;
cout << "Number of TX channels: " << num_tx_channels << endl;
// check if the settings are already there
float_type frq_read;
if (LMS_GetLOFrequency(device, LMS_CH_RX, 0, &frq_read) != 0)
if (LMS_GetLOFrequency(device, LMS_CH_RX, LimeCfg.channel, &frq_read) != 0)
error();
float_type srate_read, rf_rate;
if (LMS_GetSampleRate(device, LMS_CH_RX, 0, &srate_read, &rf_rate) != 0)
if (LMS_GetSampleRate(device, LMS_CH_RX, LimeCfg.channel, &srate_read,
&rf_rate) != 0)
error();
bool frqdev = fabs(frq_read - LimeCfg.frq) > 1.0;
@ -847,7 +926,7 @@ int run_experiment(LimeConfig_t LimeCfg,
// First mute the TX output, as the init commands create a lot of garbage
if (LMS_WriteParam(device, LMS7_PD_TLOBUF_TRF, 1) != 0)
error();
if (LMS_SetGaindB(device, LMS_CH_TX, 0, 0) != 0) {
if (LMS_SetGaindB(device, LMS_CH_TX, LimeCfg.channel, 0) != 0) {
cout << "Initializing device first!" << endl;
@ -856,33 +935,44 @@ int run_experiment(LimeConfig_t LimeCfg,
if (LMS_Init(device) != 0)
error();
// retry
if (LMS_SetGaindB(device, LMS_CH_TX, 0, 0) != 0)
if (LMS_SetGaindB(device, LMS_CH_TX, LimeCfg.channel, 0) != 0)
error();
}
if (LMS_SetNormalizedGain(device, LMS_CH_TX, 0, 0.0) != 0)
if (LMS_SetNormalizedGain(device, LMS_CH_TX, LimeCfg.channel, 0.0) != 0)
error();
// Set RX center frequency
if (LMS_SetLOFrequency(device, LMS_CH_RX, 0, LimeCfg.frq) != 0)
if (LMS_SetLOFrequency(device, LMS_CH_RX, LimeCfg.channel, LimeCfg.frq) !=
0)
error();
// Set TX center frequency
if (LMS_SetLOFrequency(device, LMS_CH_TX, 0, LimeCfg.frq) != 0)
if (LMS_SetLOFrequency(device, LMS_CH_TX, LimeCfg.channel, LimeCfg.frq) !=
0)
error();
// Read back the updated frequency for later storage
if (LMS_GetLOFrequency(device, LMS_CH_RX, 0, &frq_read) != 0)
if (LMS_GetLOFrequency(device, LMS_CH_RX, LimeCfg.channel, &frq_read) != 0)
error();
// Enable RX channel
// Channels are numbered starting at 0
if (LMS_EnableChannel(device, LMS_CH_RX, 0, true) != 0)
if (LMS_EnableChannel(device, LMS_CH_RX, LimeCfg.channel, true) != 0)
error();
// Enable TX channels
if (LMS_EnableChannel(device, LMS_CH_TX, 0, true) != 0)
if (LMS_EnableChannel(device, LMS_CH_TX, LimeCfg.channel, true) != 0)
error();
// fwd the TX1 LO to TX2
if (LMS_WriteParam(device, LMS7_EN_NEXTTX_TRF, true) != 0)
error();
if (LMS_WriteParam(device, LMS7_EN_NEXTRX_RFE, true) != 0)
error();
// apply DC offset in TxTSP
if (LMS_WriteParam(device, LMS7_MAC, LimeCfg.channel + 1) != 0)
error();
// if (LMS_WriteParam(device, LMS7_MAC, LimeCfg.channel) != 0) error();
uint16_t DC_I, DC_Q, DC_EN;
DC_EN = 0;
if (LMS_WriteParam(device, LMS7_DCCORRI_TXTSP, LimeCfg.TX_IcorrDC) != 0)
@ -907,8 +997,11 @@ int run_experiment(LimeConfig_t LimeCfg,
// added by me as the IQ calibration did not happen on the chip from python
// or c++
if (LMS_WriteParam(device, LMS7_MAC, 1) != 0)
if (LMS_WriteParam(device, LMS7_MAC, LimeCfg.channel + 1) != 0)
error();
// if (LMS_WriteParam(device, LMS7_MAC, LimeCfg.channel) != 0)
// error();
/*
// read back DC offset in TxTSP
if (LMS_ReadParam(device, LMS7_DCCORRI_TXTSP, &DC_I) != 0) error();
@ -923,62 +1016,76 @@ DC_Q << endl;
lms_name_t antenna_list[10]; // large enough list for antenna names.
// Alternatively, NULL can be passed to LMS_GetAntennaList() to obtain
// number of antennae
if ((n = LMS_GetAntennaList(device, LMS_CH_RX, 0, antenna_list)) < 0)
int num_antennas;
if ((num_antennas = LMS_GetAntennaList(device, LMS_CH_RX, LimeCfg.channel,
antenna_list)) < 0)
error();
cout << "Available RX LNAs:\n"; // print available antennae names
for (int i = 0; i < n; i++)
for (int i = 0; i < num_antennas; i++)
cout << i << ": " << antenna_list[i] << endl;
// get and print antenna index and name
if ((n = LMS_GetAntenna(device, LMS_CH_RX, 0)) < 0)
int antenna_index;
if ((antenna_index = LMS_GetAntenna(device, LMS_CH_RX, LimeCfg.channel)) <
0)
error();
cout << "Automatically selected RX LNA: " << n << ": " << antenna_list[n]
<< endl;
cout << "Automatically selected RX LNA: " << antenna_index << ": "
<< antenna_list[antenna_index] << endl;
// manually select antenna
if (LMS_SetAntenna(device, LMS_CH_RX, 0, LMS_PATH_LNAL) != 0)
if (LMS_SetAntenna(device, LMS_CH_RX, LimeCfg.channel, LMS_PATH_LNAL) != 0)
error();
// get and print antenna index and name
if ((n = LMS_GetAntenna(device, LMS_CH_RX, 0)) < 0)
if ((antenna_index = LMS_GetAntenna(device, LMS_CH_RX, LimeCfg.channel)) <
0)
error();
cout << "Manually selected RX LNA: " << n << ": " << antenna_list[n]
<< endl;
cout << "Manually selected RX LNA: " << antenna_index << ": "
<< antenna_list[antenna_index] << endl;
// select antenna port
// Alternatively, NULL can be passed to LMS_GetAntennaList() to obtain
// number of antennae
if ((n = LMS_GetAntennaList(device, LMS_CH_TX, 0, antenna_list)) < 0)
if ((num_antennas = LMS_GetAntennaList(device, LMS_CH_TX, LimeCfg.channel,
antenna_list)) < 0)
error();
cout << "Available TX pathways:\n"; // print available antennae names
for (int i = 0; i < n; i++)
for (int i = 0; i < num_antennas; i++)
cout << i << ": " << antenna_list[i] << endl;
// get and print print antenna index and name
if ((n = LMS_GetAntenna(device, LMS_CH_TX, 0)) < 0)
if ((antenna_index = LMS_GetAntenna(device, LMS_CH_TX, LimeCfg.channel)) <
0)
error();
cout << "Automatically selected TX pathway: " << n << ": "
<< antenna_list[n] << endl;
cout << "Automatically selected TX pathway: " << antenna_index << ": "
<< antenna_list[antenna_index] << endl;
// manually select antenna
int mychoice = LMS_PATH_TX1;
int tx_path = LMS_PATH_TX1;
if (LimeCfg.frq > 1500e6)
mychoice = LMS_PATH_TX2;
if (LMS_SetAntenna(device, LMS_CH_TX, 0, mychoice) != 0)
tx_path = LMS_PATH_TX2;
if (LMS_SetAntenna(device, LMS_CH_TX, LimeCfg.channel, tx_path) != 0)
error();
// get and print print antenna index and name
if ((n = LMS_GetAntenna(device, LMS_CH_TX, 0)) < 0)
if ((antenna_index = LMS_GetAntenna(device, LMS_CH_TX, LimeCfg.channel)) <
0)
error();
cout << "Manually selected TX pathway: " << n << ": " << antenna_list[n]
<< endl;
cout << "Manually selected TX pathway: " << antenna_index << ": "
<< antenna_list[antenna_index] << endl;
// Set sample rate, w/o oversampling, so that we can remove the invsinc
// filter
if (LMS_SetSampleRate(device, LimeCfg.srate, 1) != 0)
error();
// Invsinc, which removes that non-causal wiggle in timedomain
// if (LMS_WriteParam(device, LMS7_MAC, chn) != 0) error();
if (LMS_WriteParam(device, LMS7_MAC, LimeCfg.channel + 1) != 0)
error();
if (LMS_WriteParam(device, LMS7_ISINC_BYP_TXTSP, 1) != 0)
error();
// CMIX: Disable, as it is not used
@ -997,9 +1104,9 @@ DC_Q << endl;
error();
// Set RX and TX to the gain values
if (LMS_SetGaindB(device, LMS_CH_TX, 0, LimeCfg.TX_gain) != 0)
if (LMS_SetGaindB(device, LMS_CH_TX, LimeCfg.channel, LimeCfg.TX_gain) != 0)
error();
if (LMS_SetGaindB(device, LMS_CH_RX, 0, LimeCfg.RX_gain) != 0)
if (LMS_SetGaindB(device, LMS_CH_RX, LimeCfg.channel, LimeCfg.RX_gain) != 0)
error();
cout << "After gain setting: " << endl;
@ -1047,16 +1154,16 @@ DC_Q << endl;
cout << "TX LPF bandwitdh range: " << range.min / 1e6 << " - "
<< range.max / 1e6 << " MHz\n\n";
if (LMS_SetLPFBW(device, LMS_CH_RX, 0, LimeCfg.RX_LPF) != 0)
if (LMS_SetLPFBW(device, LMS_CH_RX, LimeCfg.channel, LimeCfg.RX_LPF) != 0)
error();
if (LMS_SetLPFBW(device, LMS_CH_TX, 0, LimeCfg.TX_LPF) != 0)
if (LMS_SetLPFBW(device, LMS_CH_TX, LimeCfg.channel, LimeCfg.TX_LPF) != 0)
error();
float_type LPFBW; // lowpass bandwidth
if (LMS_GetLPFBW(device, LMS_CH_RX, 0, &LPFBW) != 0)
if (LMS_GetLPFBW(device, LMS_CH_RX, LimeCfg.channel, &LPFBW) != 0)
error();
cout << "RX LPFBW: " << LPFBW / 1e6 << " MHz" << endl;
if (LMS_GetLPFBW(device, LMS_CH_TX, 0, &LPFBW) != 0)
if (LMS_GetLPFBW(device, LMS_CH_TX, LimeCfg.channel, &LPFBW) != 0)
error();
cout << "TX LPFBW: " << LPFBW / 1e6 << " MHz" << endl;
@ -1110,7 +1217,7 @@ DC_Q << endl;
// All streams setups should be done before starting streams. New streams
// cannot be set-up if at least stream is running.
for (int ii = 0; ii < chCount; ++ii) {
rx_streams[ii].channel = ii; // channel number
rx_streams[ii].channel = LimeCfg.channel; // channel number
rx_streams[ii].fifoSize =
buffersize * N_buffers_per_fifo; // fifo size in samples
rx_streams[ii].throughputVsLatency =
@ -1121,7 +1228,7 @@ DC_Q << endl;
if (LMS_SetupStream(device, &rx_streams[ii]) != 0)
error();
tx_streams[ii].channel = ii; // channel number
tx_streams[ii].channel = LimeCfg.channel; // channel number
tx_streams[ii].fifoSize =
buffersize * N_buffers_per_fifo; // fifo size in samples
tx_streams[ii].throughputVsLatency =
@ -1689,7 +1796,6 @@ DC_Q << endl;
ii_TXrep++;
// in case the entire experiment fits within the TX FIFO
if (ii_TXrep == LimeCfg.repetitions) {
TXFIFO_slots = 0;
break;
}
}
@ -1704,7 +1810,6 @@ DC_Q << endl;
ii_TXrep++;
// in case the entire experiment fits within the TX FIFO
if (ii_TXrep == LimeCfg.repetitions) {
TXFIFO_slots = 0;
break;
}
}
@ -1715,14 +1820,14 @@ DC_Q << endl;
}
}
/*
// Check for the TX buffer and keep it filled
LMS_GetStreamStatus(tx_streams, &status); // Obtain TX stream stats
if (status.fifoFilledCount != 0) cout << TXFIFO_slots <<" TXFIFO slots free
before start: " << status.fifoFilledCount << " samples of " << status.fifoSize
<< " with HW stamp " << status.timestamp <<" at RX timestamp" <<
rx_metadata.timestamp << endl;
*/
if (status.fifoFilledCount != 0)
cout << TXFIFO_slots
<< " TXFIFO slots free before start: " << status.fifoFilledCount
<< " samples of " << status.fifoSize << " with HW stamp "
<< status.timestamp << " at RX timestamp" << rx_metadata.timestamp
<< endl;
// Main acquisition loop
while (ii_acq < LimeCfg.repetitions * LimeCfg.averages * num_phavar) {
@ -2230,21 +2335,6 @@ int main(int argc, char **argv) {
std::vector<Config2HDFattr_t> HDFattrVector = getHDFAttributes(LimeCfg);
size_t no_of_attr = HDFattrVector.size();
bool dumpFlag = false;
// Checking for dump flag
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "--dump") == 0) {
dumpFlag = true;
}
}
// If dump flag is set, dump the config and exit
if (dumpFlag) {
dumpConfig(HDFattrVector);
std::exit(0);
}
// Parse command line arguments
if (parseArguments(argc, argv, LimeCfg, HDFattrVector) != 0) {
return 1;

3
src/limedriver.h
View file

@ -24,11 +24,12 @@
#include <direct.h> // _mkdir
#endif
#define VERSION "0.1.0"
#define VERSION "0.2.0"
struct LimeConfig_t {
float srate;
int channel;
float frq;
float frq_set;
float RX_LPF;