test: add test_rx_file
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parent
dd5712eada
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@ -61,3 +61,33 @@ target_link_libraries(
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m
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liquid
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)
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#------------------------------------
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add_executable(
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test_rx_file
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../src/layer1/correlator.c
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../src/layer1/correlator.h
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../src/layer1/freq_est.c
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../src/layer1/freq_est.h
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../src/layer1/rx.c
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../src/layer1/rx.h
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../src/layer1/whitening.c
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../src/layer1/whitening.h
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../src/layer1/modcod.c
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../src/layer1/modcod.h
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../src/layer1/preamble.c
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../src/layer1/preamble.h
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../src/utils.c
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../src/utils.h
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../src/config.h
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layer1/test_rx_file.c
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)
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target_link_libraries(
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test_rx_file
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fec
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fftw3f
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m
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liquid
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)
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156
impl/test/layer1/test_rx_file.c
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156
impl/test/layer1/test_rx_file.c
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@ -0,0 +1,156 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <liquid/liquid.h>
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#include "layer1/rx.h"
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#include "config.h"
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#define RESULT_CHECK(stmt) { \
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result_t res = stmt; \
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if(res != OK) { \
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fprintf(stderr, "Error %d in %s:%d!\n", res, __FILE__, __LINE__); \
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exit(1); \
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} \
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}
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#define CHUNKSIZE_INPUT 8000
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#define CHUNKSIZE_RF (CHUNKSIZE_INPUT/2)
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#define CHUNKSIZE_BB (CHUNKSIZE_RF/SDR_OVERSAMPLING)
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static struct {
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size_t preambles_found;
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size_t successful_decodes;
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size_t failed_decodes;
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size_t header_errors;
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} m_stats;
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static result_t sdr_rf_to_baseband(nco_crcf nco, firdecim_crcf decim,
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const float complex *rf_samples, size_t nrf,
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float complex *bb_samples, size_t *nbb)
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{
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if((*nbb * SDR_OVERSAMPLING) < nrf) {
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fprintf(stderr, "sdr_rf_to_baseband: result would not fit in output: %zd * %d < %zd\n", *nbb, SDR_OVERSAMPLING, nrf);
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return ERR_SIZE;
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}
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*nbb = nrf / SDR_OVERSAMPLING;
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for(size_t i = 0; i < *nbb; i++) {
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float complex tmp[SDR_OVERSAMPLING];
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assert(i*SDR_OVERSAMPLING < nrf);
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nco_crcf_mix_block_down(nco,
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(complex float*)(rf_samples + i * SDR_OVERSAMPLING),
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tmp,
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SDR_OVERSAMPLING);
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firdecim_crcf_execute(decim, tmp, bb_samples + i);
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}
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return OK;
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}
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void cb_rx(rx_evt_t evt, uint8_t *packet_data, size_t packet_len)
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{
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switch(evt)
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{
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case RX_EVT_CHECKSUM_ERROR:
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//fprintf(stderr, "Received a message of %zu bytes, but decoding failed.\n", packet_len);
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//fprintf(stderr, "=== FAILED PAYLOAD ===\n");
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//hexdump(packet_data, packet_len);
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//fprintf(stderr, "=======================\n");
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m_stats.failed_decodes++;
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break;
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case RX_EVT_HEADER_ERROR:
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m_stats.header_errors++;
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break;
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case RX_EVT_PACKET_RECEIVED:
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//fprintf(stderr, "A message of %zu bytes was decoded successfully.\n", packet_len);
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//fprintf(stderr, "=== DECODED PAYLOAD (%4zu bytes) ===\n", packet_len);
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//hexdump(packet_data, packet_len < 64 ? packet_len : 64);
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//fprintf(stderr, "====================================\n");
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m_stats.successful_decodes++;
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break;
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case RX_EVT_PREAMBLE_FOUND:
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//fprintf(stderr, "Found preamble!\n");
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m_stats.preambles_found++;
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break;
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}
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}
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int main(int argc, char **argv)
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{
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if(argc < 2) {
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fprintf(stderr, "Not enough arguments!\n");
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fprintf(stderr, "usage: %s <dump-file>\n\n", argv[0]);
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fprintf(stderr, "dump-file: HackRF dump in 8-bit signed interleaved I/Q format.\n");
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return 1;
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}
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layer1_rx_t rx;
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FILE *inputfile;
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int8_t rbuf[CHUNKSIZE_INPUT];
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// ** Initialize **
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firdecim_crcf decim = firdecim_crcf_create_kaiser(SDR_OVERSAMPLING, 9, 60.0f);
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nco_crcf rx_nco = nco_crcf_create(LIQUID_NCO);
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inputfile = fopen(argv[1], "rb");
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if(!inputfile) {
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fprintf(stderr, "Could not open input file!\n");
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return 1;
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}
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RESULT_CHECK(layer1_rx_init(&rx, cb_rx));
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// ** Process packets **
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size_t nread;
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while((nread = fread(rbuf, 1, sizeof(rbuf), inputfile)) != 0) {
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assert(nread % 2 == 0);
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// ** Receive signal **
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float complex rf_samples[CHUNKSIZE_RF];
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float complex bb_samples[CHUNKSIZE_BB];
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size_t n_rf_samples = CHUNKSIZE_RF;
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size_t n_bb_samples = CHUNKSIZE_BB;
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for(size_t iout = 0; iout < CHUNKSIZE_RF; iout++) {
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rf_samples[iout] = 0.0078125f * (rbuf[2*iout + 0] + I * rbuf[2*iout + 1]);
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}
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RESULT_CHECK(sdr_rf_to_baseband(rx_nco, decim, rf_samples, n_rf_samples, bb_samples, &n_bb_samples));
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RESULT_CHECK(layer1_rx_process(&rx, bb_samples, n_bb_samples));
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fprintf(stderr, "Receiver statistics:\n");
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fprintf(stderr, " Preambles found: %8zd\n", m_stats.preambles_found);
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fprintf(stderr, " Successful decodes: %8zd (%6.2f %%)\n",
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m_stats.successful_decodes, m_stats.successful_decodes * 100.0f / m_stats.preambles_found);
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fprintf(stderr, " Header errors: %8zd (%6.2f %%)\n",
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m_stats.header_errors, m_stats.header_errors * 100.0f / m_stats.preambles_found);
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fprintf(stderr, " Failed decodes: %8zd (%6.2f %%)\n",
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m_stats.failed_decodes, m_stats.failed_decodes * 100.0f / m_stats.preambles_found);
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}
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// ** Cleanup **
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layer1_rx_shutdown(&rx);
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fprintf(stderr, "Done.\n");
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}
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