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https://github.com/OpenRTX/OpenRTX
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205c483a8e
This test uses the APRS Demodulator to decode raw int16 samples sampled at 9600 Hz. It reads the data in chunks of APRS_BUF_SIZE and compares the result to known values. The packets are 10 APRS message packets. Signed-off-by: Ryan Tolboom <Ryan.Tolboom@njit.edu>
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/*
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* SPDX-FileCopyrightText: Copyright 2020-2026 OpenRTX Contributors
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "core/dsp.h"
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#include "protocols/APRS/constants.h"
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#include "protocols/APRS/Demodulator.hpp"
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#include "protocols/APRS/packet.h"
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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constexpr const char *TEST_FILE = "../tests/unit/assets/aprs.raw";
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constexpr const char *TEST_PACKETS[] = {
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"N2BP-7>APRS::N2BP-7 :Testing 1", "N2BP-7>APRS::N2BP-7 :Testing 2",
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"N2BP-7>APRS::N2BP-7 :Testing 3", "N2BP-7>APRS::N2BP-7 :Testing 4",
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"N2BP-7>APRS::N2BP-7 :Testing 5", "N2BP-7>APRS::N2BP-7 :Testing 6",
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"N2BP-7>APRS::N2BP-7 :Testing 7", "N2BP-7>APRS::N2BP-7 :Testing 8",
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"N2BP-7>APRS::N2BP-7 :Testing 9", "N2BP-7>APRS::N2BP-7 :Testing 10"
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};
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/**
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* @brief Fills a buffer with the TNC2 text representation of an APRS packet
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*
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* @param pkt pointer to an aprsPacket
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* @param output pointer to char buffer to fill
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*/
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void strFromPkt(struct aprsPacket *pkt, char *output)
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{
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char ssid[4];
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output[0] = '\0';
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strcat(output, pkt->addresses[1].addr);
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if (pkt->addresses[1].ssid) {
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sprintf(ssid, "-%d", pkt->addresses[1].ssid);
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strcat(output, ssid);
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}
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strcat(output, ">");
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strcat(output, pkt->addresses[0].addr);
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for (uint8_t i = 2; i < pkt->addressesLen; i++) {
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strcat(output, ",");
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strcat(output, pkt->addresses[i].addr);
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if (pkt->addresses[i].ssid) {
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sprintf(ssid, "-%d", pkt->addresses[i].ssid);
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strcat(output, ssid);
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}
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if (pkt->addresses[i].commandHeard)
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strcat(output, "*");
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}
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strcat(output, ":");
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strcat(output, pkt->info);
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}
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int main()
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{
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// Test APRS Demodulator on sample data
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printf("Testing APRS\n");
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FILE *file = fopen(TEST_FILE, "rb");
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if (!file) {
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printf("Error opening APRS baseband file\n");
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return -1;
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}
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dataBlock_t baseband;
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baseband.data = (int16_t *)malloc(APRS_BUF_SIZE * sizeof(int16_t));
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baseband.len = APRS_BUF_SIZE;
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if (!baseband.data) {
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printf("Error allocating memory for baseband buffer\n");
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return -1;
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}
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APRS::Demodulator demodulator;
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demodulator.init();
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size_t readItems = 0;
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size_t pktNum = 0;
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bool errorFlag = false;
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while ((readItems = fread(baseband.data, 2, APRS_BUF_SIZE, file)) > 0) {
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if (demodulator.update(baseband)) {
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frameData &frame = demodulator.getFrame();
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char pktStr[256];
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struct aprsPacket *pkt = aprsPktFromFrame(&frame);
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strFromPkt(pkt, pktStr);
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printf("Frame %ld: %s\n", pktNum, pktStr);
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free(pkt);
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if (strcmp(TEST_PACKETS[pktNum], pktStr)) {
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printf("Packet %ld does not match:\n", pktNum);
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printf(" Expected \"%s\"\n", TEST_PACKETS[pktNum]);
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printf(" Decoded \"%s\"\n", pktStr);
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errorFlag = true;
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}
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pktNum++;
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}
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}
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fclose(file);
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free(baseband.data);
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if (errorFlag) {
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return -1;
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}
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if (pktNum != 10) {
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printf("%ld frames decoded, expected 10\n", pktNum);
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return -1;
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}
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return 0;
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}
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