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Reorganize Soapy stream management; flush tx buffer

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This commit is contained in:
Thomas Kolb 2022-04-03 18:11:52 +02:00
parent 152d2f02f6
commit 47fc177e87
3 changed files with 54 additions and 33 deletions
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21
impl/src/main.c
View file

@ -6,6 +6,8 @@
#include <math.h>
#include <ctype.h>
#include <SoapySDR/Logger.h>
#include <liquid/liquid.h>
#include <sys/poll.h>
@ -26,7 +28,7 @@
#define RESULT_CHECK(stmt) { \
result_t res = stmt; \
if(res != OK) { \
fprintf(stderr, "Error %d in %s:%d!", res, __FILE__, __LINE__); \
fprintf(stderr, "Error %d in %s:%d!\n", res, __FILE__, __LINE__); \
exit(1); \
} \
}
@ -171,6 +173,8 @@ int main(void)
sdr_ctx_t sdr;
SoapySDR_setLogLevel(SOAPY_SDR_DEBUG);
bool on_air = false;
debug_fd = open("/tmp/dump.cf32", O_CREAT | O_WRONLY | O_TRUNC);
@ -201,9 +205,6 @@ int main(void)
unsigned rx_retries = 0;
float complex zeros[1024];
memset(zeros, 0, sizeof(zeros));
while(m_running) {
if(on_air || !layer1_rx_is_busy(&rx)) {
int ret = poll(&pfd, 1, 0);
@ -237,17 +238,19 @@ int main(void)
dump_array_cf(whole_burst, burst_len, 1.0f, "/tmp/tx.cpx");
if(!on_air) {
RESULT_CHECK(sdr_start_tx(&sdr));
RESULT_CHECK(sdr_start_tx(&sdr, burst_len * SDR_OVERSAMPLING));
RESULT_CHECK(sdr_flush_tx_buffer(&sdr));
}
RESULT_CHECK(transmit_in_chunks(&sdr, whole_burst, burst_len));
on_air = true;
} else if(on_air) { // ret == 0
//RESULT_CHECK(sdr_start_rx(&sdr));
//on_air = false;
fprintf(stderr, "z");
sdr_transmit(&sdr, zeros, sizeof(zeros)/sizeof(zeros[0]), 100000);
RESULT_CHECK(sdr_flush_tx_buffer(&sdr));
RESULT_CHECK(sdr_start_rx(&sdr));
on_air = false;
}
}

62
impl/src/sdr/sdr.c
View file

@ -11,7 +11,7 @@
#include "sdr.h"
static void shutdown_streams(sdr_ctx_t *ctx)
static void close_streams(sdr_ctx_t *ctx)
{
if(ctx->rx_stream) {
SoapySDRDevice_deactivateStream(ctx->sdr, ctx->rx_stream, 0, 0);
@ -107,13 +107,29 @@ result_t sdr_init(sdr_ctx_t *ctx)
return ERR_SOAPY;
}
//setup streams
ctx->rx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_RX, SOAPY_SDR_CF32, NULL, 0, NULL);
if(ctx->rx_stream == NULL) {
fprintf(stderr, "sdr: setupStream fail: %s\n", SoapySDRDevice_lastError());
return ERR_SOAPY;
}
ctx->tx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_TX, SOAPY_SDR_CF32, NULL, 0, NULL);
if(ctx->tx_stream == NULL) {
fprintf(stderr, "sdr: setupStream fail: %s\n", SoapySDRDevice_lastError());
return ERR_SOAPY;
}
return OK;
}
result_t sdr_destroy(sdr_ctx_t *ctx)
{
shutdown_streams(ctx);
close_streams(ctx);
nco_crcf_destroy(ctx->rx_nco);
nco_crcf_destroy(ctx->tx_nco);
@ -131,36 +147,20 @@ result_t sdr_destroy(sdr_ctx_t *ctx)
result_t sdr_start_rx(sdr_ctx_t *ctx)
{
shutdown_streams(ctx);
//setup a stream (complex floats)
ctx->rx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_RX, SOAPY_SDR_CF32, NULL, 0, NULL);
if(ctx->rx_stream == NULL) {
fprintf(stderr, "sdr: setupStream fail: %s\n", SoapySDRDevice_lastError());
return ERR_SOAPY;
if(SoapySDRDevice_activateStream(ctx->sdr, ctx->rx_stream, 0, 0, 0) != 0) {
fprintf(stderr, "sdr: activateStream fail: %s\n", SoapySDRDevice_lastError());
}
SoapySDRDevice_activateStream(ctx->sdr, ctx->rx_stream, 0, 0, 0); //start streaming
return OK;
}
result_t sdr_start_tx(sdr_ctx_t *ctx)
result_t sdr_start_tx(sdr_ctx_t *ctx, size_t burst_size)
{
shutdown_streams(ctx);
//setup a stream (complex floats)
ctx->tx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_TX, SOAPY_SDR_CF32, NULL, 0, NULL);
if(ctx->tx_stream == NULL) {
fprintf(stderr, "sdr: setupStream fail: %s\n", SoapySDRDevice_lastError());
return ERR_SOAPY;
if(SoapySDRDevice_activateStream(ctx->sdr, ctx->tx_stream, 0, 0, burst_size) != 0) {
fprintf(stderr, "sdr: activateStream fail: %s\n", SoapySDRDevice_lastError());
}
SoapySDRDevice_activateStream(ctx->sdr, ctx->tx_stream, 0, 0, 0); //start streaming
return OK;
}
@ -205,6 +205,22 @@ result_t sdr_receive(sdr_ctx_t *ctx, float complex *samples, size_t *nsamples, l
}
result_t sdr_flush_tx_buffer(sdr_ctx_t *ctx)
{
size_t mtu = SoapySDRDevice_getStreamMTU(ctx->sdr, ctx->tx_stream);
float complex zeros[mtu];
memset(zeros, 0, sizeof(zeros));
for(int i = 0; i < 4; i++) {
fprintf(stderr, "z");
sdr_transmit(ctx, zeros, sizeof(zeros)/sizeof(zeros[0]), 100000);
}
return OK;
}
result_t sdr_rf_to_baseband(sdr_ctx_t *ctx,
const float complex *rf_samples, size_t nrf,
float complex *bb_samples, size_t nbb)

4
impl/src/sdr/sdr.h
View file

@ -26,11 +26,13 @@ result_t sdr_init(sdr_ctx_t *ctx);
result_t sdr_destroy(sdr_ctx_t *ctx);
result_t sdr_start_rx(sdr_ctx_t *ctx);
result_t sdr_start_tx(sdr_ctx_t *ctx);
result_t sdr_start_tx(sdr_ctx_t *ctx, size_t burst_size);
result_t sdr_transmit(sdr_ctx_t *ctx, const float complex *samples, size_t nsamples, long timeout_us);
result_t sdr_receive(sdr_ctx_t *ctx, float complex *samples, size_t *nsamples, long timeout_us);
result_t sdr_flush_tx_buffer(sdr_ctx_t *ctx);
/*!
* \brief Convert and resample a received signal to baseband.
*/