test: add test_rx_file

This commit is contained in:
Thomas Kolb 2024-03-30 21:56:00 +01:00
parent dd5712eada
commit d9707ac4a9
2 changed files with 186 additions and 0 deletions

View file

@ -61,3 +61,33 @@ target_link_libraries(
m m
liquid liquid
) )
#------------------------------------
add_executable(
test_rx_file
../src/layer1/correlator.c
../src/layer1/correlator.h
../src/layer1/freq_est.c
../src/layer1/freq_est.h
../src/layer1/rx.c
../src/layer1/rx.h
../src/layer1/whitening.c
../src/layer1/whitening.h
../src/layer1/modcod.c
../src/layer1/modcod.h
../src/layer1/preamble.c
../src/layer1/preamble.h
../src/utils.c
../src/utils.h
../src/config.h
layer1/test_rx_file.c
)
target_link_libraries(
test_rx_file
fec
fftw3f
m
liquid
)

View file

@ -0,0 +1,156 @@
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <liquid/liquid.h>
#include "layer1/rx.h"
#include "config.h"
#define RESULT_CHECK(stmt) { \
result_t res = stmt; \
if(res != OK) { \
fprintf(stderr, "Error %d in %s:%d!\n", res, __FILE__, __LINE__); \
exit(1); \
} \
}
#define CHUNKSIZE_INPUT 8000
#define CHUNKSIZE_RF (CHUNKSIZE_INPUT/2)
#define CHUNKSIZE_BB (CHUNKSIZE_RF/SDR_OVERSAMPLING)
static struct {
size_t preambles_found;
size_t successful_decodes;
size_t failed_decodes;
size_t header_errors;
} m_stats;
static result_t sdr_rf_to_baseband(nco_crcf nco, firdecim_crcf decim,
const float complex *rf_samples, size_t nrf,
float complex *bb_samples, size_t *nbb)
{
if((*nbb * SDR_OVERSAMPLING) < nrf) {
fprintf(stderr, "sdr_rf_to_baseband: result would not fit in output: %zd * %d < %zd\n", *nbb, SDR_OVERSAMPLING, nrf);
return ERR_SIZE;
}
*nbb = nrf / SDR_OVERSAMPLING;
for(size_t i = 0; i < *nbb; i++) {
float complex tmp[SDR_OVERSAMPLING];
assert(i*SDR_OVERSAMPLING < nrf);
nco_crcf_mix_block_down(nco,
(complex float*)(rf_samples + i * SDR_OVERSAMPLING),
tmp,
SDR_OVERSAMPLING);
firdecim_crcf_execute(decim, tmp, bb_samples + i);
}
return OK;
}
void cb_rx(rx_evt_t evt, uint8_t *packet_data, size_t packet_len)
{
switch(evt)
{
case RX_EVT_CHECKSUM_ERROR:
//fprintf(stderr, "Received a message of %zu bytes, but decoding failed.\n", packet_len);
//fprintf(stderr, "=== FAILED PAYLOAD ===\n");
//hexdump(packet_data, packet_len);
//fprintf(stderr, "=======================\n");
m_stats.failed_decodes++;
break;
case RX_EVT_HEADER_ERROR:
m_stats.header_errors++;
break;
case RX_EVT_PACKET_RECEIVED:
//fprintf(stderr, "A message of %zu bytes was decoded successfully.\n", packet_len);
//fprintf(stderr, "=== DECODED PAYLOAD (%4zu bytes) ===\n", packet_len);
//hexdump(packet_data, packet_len < 64 ? packet_len : 64);
//fprintf(stderr, "====================================\n");
m_stats.successful_decodes++;
break;
case RX_EVT_PREAMBLE_FOUND:
//fprintf(stderr, "Found preamble!\n");
m_stats.preambles_found++;
break;
}
}
int main(int argc, char **argv)
{
if(argc < 2) {
fprintf(stderr, "Not enough arguments!\n");
fprintf(stderr, "usage: %s <dump-file>\n\n", argv[0]);
fprintf(stderr, "dump-file: HackRF dump in 8-bit signed interleaved I/Q format.\n");
return 1;
}
layer1_rx_t rx;
FILE *inputfile;
int8_t rbuf[CHUNKSIZE_INPUT];
// ** Initialize **
firdecim_crcf decim = firdecim_crcf_create_kaiser(SDR_OVERSAMPLING, 9, 60.0f);
nco_crcf rx_nco = nco_crcf_create(LIQUID_NCO);
inputfile = fopen(argv[1], "rb");
if(!inputfile) {
fprintf(stderr, "Could not open input file!\n");
return 1;
}
RESULT_CHECK(layer1_rx_init(&rx, cb_rx));
// ** Process packets **
size_t nread;
while((nread = fread(rbuf, 1, sizeof(rbuf), inputfile)) != 0) {
assert(nread % 2 == 0);
// ** Receive signal **
float complex rf_samples[CHUNKSIZE_RF];
float complex bb_samples[CHUNKSIZE_BB];
size_t n_rf_samples = CHUNKSIZE_RF;
size_t n_bb_samples = CHUNKSIZE_BB;
for(size_t iout = 0; iout < CHUNKSIZE_RF; iout++) {
rf_samples[iout] = 0.0078125f * (rbuf[2*iout + 0] + I * rbuf[2*iout + 1]);
}
RESULT_CHECK(sdr_rf_to_baseband(rx_nco, decim, rf_samples, n_rf_samples, bb_samples, &n_bb_samples));
RESULT_CHECK(layer1_rx_process(&rx, bb_samples, n_bb_samples));
fprintf(stderr, "Receiver statistics:\n");
fprintf(stderr, " Preambles found: %8zd\n", m_stats.preambles_found);
fprintf(stderr, " Successful decodes: %8zd (%6.2f %%)\n",
m_stats.successful_decodes, m_stats.successful_decodes * 100.0f / m_stats.preambles_found);
fprintf(stderr, " Header errors: %8zd (%6.2f %%)\n",
m_stats.header_errors, m_stats.header_errors * 100.0f / m_stats.preambles_found);
fprintf(stderr, " Failed decodes: %8zd (%6.2f %%)\n",
m_stats.failed_decodes, m_stats.failed_decodes * 100.0f / m_stats.preambles_found);
}
// ** Cleanup **
layer1_rx_shutdown(&rx);
fprintf(stderr, "Done.\n");
}