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/*
* Copyright (c) 2019 Analog Devices Inc.
*
* This file is part of libm2k
* (see http://www.github.com/analogdevicesinc/libm2k).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// This example assumes the following connections:
// W1 -> 1+
// W2 -> 2+
// GND -> 1-
// GND -> 2-
//
// This example shows the analog DAC streaming feature of the m2k
//
// Running example: ./stream_test_dac uri=usb:1.9.5 kernel=64 oversampling_ratio=10 no_samples=15384 amplitude_out=2.0 timeout=3
//
// Help:
// -kernel : integer number of desired kernel buffers
// -oversampling_ratio : integer number to determine sample_rate for ADC (sample_rate = 100MHz/oversampling-ratio
// -no_samples : integer number to determine the buffer size for ADC
// -frequency_out : The frequency of sawtooth signal generated on the DAC channels (in Hz)
// -amplitude_out: The frequency of sawtooth signal generated on the DAC channels (in Volts)
// -timeout: How long should this test run. Leave empty to run forever.
//
// The application will generate a sawtooth wave on W1 and W2.
// (The amplitude and frequency should be provided as arguments to this application).
// If a timeout value is provided, the program will exit
// The DAC streaming should be analyzed using an external Oscilloscope.
#include <iostream>
#include <libm2k/m2k.hpp>
#include <libm2k/contextbuilder.hpp>
#include <libm2k/analog/m2kanalogin.hpp>
#include <libm2k/analog/m2kanalogout.hpp>
#include <bitset>
#include <queue>
#include <thread>
#include <mutex>
#include <iomanip>
#include <condition_variable>
#include <math.h>
#include <fstream>
using namespace std;
using namespace libm2k;
using namespace libm2k::analog;
using namespace libm2k::context;
#define MAX_SAMPLE_RATE_OUT 75000000
static int KERNEL_BUFFERS_COUNT;
static string URI;
static int OVERSAMPLING_RATIO;
static int OUT_NB_SAMPLES;
static double AMPLITUDE_SIGNAL_OUT;
static double TIMEOUT = 0;
static double OFFSET_SIGNAL_OUT;
static double SAMPLE_RATE_OUT;
static bool DONT_STOP_STREAMING = true;
std::vector<double> generate_sawtooth_wave(int nb_samples, double signal_amplitude, double signal_offset)
{
std::vector<double> best_buffer_out;
for (int i = 0; i < nb_samples; i++) {
best_buffer_out.push_back((signal_amplitude * ((double)i / nb_samples)) + signal_offset );
}
return best_buffer_out;
}
void push_thread(M2kAnalogOut *aout, vector<vector<double>> bufferOut) {
int buffer_counter = 0;
while (DONT_STOP_STREAMING) {
aout->push(bufferOut);
buffer_counter++;
std::cout << "buffer cnt: " << buffer_counter << " buffer size: " << bufferOut[0].size() << std::endl;
}
}
std::vector<std::string> split(std::string s, std::string delimiter) {
size_t pos_start = 0, pos_end, delim_len = delimiter.length();
std::string token;
std::vector<std::string> res;
while ((pos_end = s.find(delimiter, pos_start)) != string::npos) {
token = s.substr(pos_start, pos_end - pos_start);
pos_start = pos_end + delim_len;
res.push_back(token);
}
res.push_back(s.substr(pos_start));
return res;
}
int main(int argc, char **argv)
{
if (argc != 7) {
std::cout << "Missing parameters: 'stream_test_dac.exe "
"uri=<usb:x.y.z or ip:192.168.2.1> "
"kernel=<1..64> "
"oversampling_ratio=<1..75E6> "
"no_samples=<int> "
"amplitude_out=<1.0..5.0> "
"timeout=<seconds> ' \n\n"
"Help:\n"
"-uri : The URI of ADALM2000.\n"
"-kernel : integer number of desired kernel buffers\n"
"-oversampling_ratio : integer number to determine sample_rate for DAC (sample_rate = 75MHz/oversampling-ratio\n"
"-nb_samples_out : The buffer size for the output signal\n"
"-amplitude_out: The frequency of sawtooth signal generated on the DAC channels (in Volts)\n"
"-timeout: How long should this test run. Leave empty to run forever."
<< std::endl;
return 1;
}
URI = split(argv[1], "=")[1];
KERNEL_BUFFERS_COUNT = stoi(split(argv[2], "=")[1]);
OVERSAMPLING_RATIO = stoi(split(argv[3], "=")[1]);
OUT_NB_SAMPLES = stoi(split(argv[4], "=")[1]);
AMPLITUDE_SIGNAL_OUT = stod(split(argv[5], "=")[1]);
auto tmp = split(argv[6], "=");
if (tmp[1] != "") {
TIMEOUT = stod(tmp[1]);
} else {
TIMEOUT = 0;
}
OFFSET_SIGNAL_OUT = -(AMPLITUDE_SIGNAL_OUT/2);
SAMPLE_RATE_OUT = MAX_SAMPLE_RATE_OUT / OVERSAMPLING_RATIO;
printf("DAC stream speed test parameters\n"
"Signal amplitude: %f Volts\n"
"Signal buffer size: %d samples\n"
"Kernel Buffers: %d\n"
"Generating %f seconds worth of data\n"
"Streaming @ %f\n",
AMPLITUDE_SIGNAL_OUT, OUT_NB_SAMPLES, KERNEL_BUFFERS_COUNT, TIMEOUT, SAMPLE_RATE_OUT);
M2k *ctx = m2kOpen(URI.c_str());
if (!ctx) {
std::cout << "Connection Error: No ADALM2000 device available/connected to your PC." << std::endl;
return 1;
}
M2kAnalogOut *aout = ctx->getAnalogOut();
// Prevent bad initial config
aout->reset();
ctx->calibrateDAC();
aout->setSampleRate(0, MAX_SAMPLE_RATE_OUT);
aout->setSampleRate(1, MAX_SAMPLE_RATE_OUT);
// set number of kernel buffers for the analog output interface
aout->setKernelBuffersCount(0, KERNEL_BUFFERS_COUNT);
aout->setKernelBuffersCount(1, KERNEL_BUFFERS_COUNT);
aout->setOversamplingRatio(0, OVERSAMPLING_RATIO);
aout->setOversamplingRatio(1, OVERSAMPLING_RATIO);
auto buf_ch = generate_sawtooth_wave(OUT_NB_SAMPLES, AMPLITUDE_SIGNAL_OUT, OFFSET_SIGNAL_OUT);
vector<vector<double>> bufferOut {buf_ch, buf_ch};
/* Enable the DAC channels before every push(after every stop) in order to setup powerdown */
aout->enableChannel(0, true);
aout->enableChannel(1, true);
aout->setCyclic(false);
// Startup push threads
std::thread producer = std::thread([](M2kAnalogOut *aout, vector<vector<double>> buf){
push_thread(aout, buf);
}, aout, bufferOut);
if (TIMEOUT != 0) {
std::this_thread::sleep_for(std::chrono::duration<double>(TIMEOUT));
DONT_STOP_STREAMING = false;
}
producer.join();
aout->stop();
aout->setOversamplingRatio(0, 1);
aout->setOversamplingRatio(1, 1);
contextClose(ctx);
return 0;
}
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