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519 lines
16 KiB
C
519 lines
16 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <libbladeRF.h>
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#include <sys/time.h>
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#include <string.h>
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#include <unistd.h>
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#include <pthread.h>
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#include "srslte/srslte.h"
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#include "rf_blade_imp.h"
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#include "srslte/rf/rf.h"
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#define CONVERT_BUFFER_SIZE 240*1024
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typedef struct {
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struct bladerf *dev;
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uint32_t rx_rate;
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uint32_t tx_rate;
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int16_t rx_buffer[CONVERT_BUFFER_SIZE];
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int16_t tx_buffer[CONVERT_BUFFER_SIZE];
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bool rx_stream_enabled;
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bool tx_stream_enabled;
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} rf_blade_handler_t;
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srslte_rf_error_handler_t blade_error_handler = NULL;
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void rf_blade_suppress_stdout(void *h) {
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bladerf_log_set_verbosity(BLADERF_LOG_LEVEL_SILENT);
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}
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void rf_blade_register_error_handler(void *notused, srslte_rf_error_handler_t new_handler)
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{
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new_handler = blade_error_handler;
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}
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bool rf_blade_rx_wait_lo_locked(void *h)
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{
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usleep(1000);
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return true;
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}
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const unsigned int num_buffers = 256;
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const unsigned int ms_buffer_size_rx = 1024;
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const unsigned int buffer_size_tx = 1024;
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const unsigned int num_transfers = 32;
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const unsigned int timeout_ms = 4000;
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char* rf_blade_devname(void* h)
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{
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return DEVNAME;
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}
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int rf_blade_start_tx_stream(void *h)
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{
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int status;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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status = bladerf_sync_config(handler->dev,
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BLADERF_MODULE_TX,
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BLADERF_FORMAT_SC16_Q11_META,
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num_buffers,
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buffer_size_tx,
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num_transfers,
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timeout_ms);
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if (status != 0) {
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fprintf(stderr, "Failed to configure TX sync interface: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_enable_module(handler->dev, BLADERF_MODULE_TX, true);
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if (status != 0) {
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fprintf(stderr, "Failed to enable TX module: %s\n", bladerf_strerror(status));
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return status;
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}
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handler->tx_stream_enabled = true;
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return 0;
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}
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int rf_blade_start_rx_stream(void *h)
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{
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int status;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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/* Configure the device's RX module for use with the sync interface.
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* SC16 Q11 samples *with* metadata are used. */
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uint32_t buffer_size_rx = ms_buffer_size_rx*(handler->rx_rate/1000/1024);
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status = bladerf_sync_config(handler->dev,
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BLADERF_MODULE_RX,
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BLADERF_FORMAT_SC16_Q11_META,
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num_buffers,
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buffer_size_rx,
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num_transfers,
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timeout_ms);
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if (status != 0) {
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fprintf(stderr, "Failed to configure RX sync interface: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_sync_config(handler->dev,
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BLADERF_MODULE_TX,
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BLADERF_FORMAT_SC16_Q11_META,
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num_buffers,
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buffer_size_tx,
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num_transfers,
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timeout_ms);
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if (status != 0) {
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fprintf(stderr, "Failed to configure TX sync interface: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_enable_module(handler->dev, BLADERF_MODULE_RX, true);
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if (status != 0) {
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fprintf(stderr, "Failed to enable RX module: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_enable_module(handler->dev, BLADERF_MODULE_TX, true);
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if (status != 0) {
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fprintf(stderr, "Failed to enable TX module: %s\n", bladerf_strerror(status));
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return status;
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}
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handler->rx_stream_enabled = true;
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return 0;
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}
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int rf_blade_stop_rx_stream(void *h)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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int status = bladerf_enable_module(handler->dev, BLADERF_MODULE_RX, false);
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if (status != 0) {
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fprintf(stderr, "Failed to enable RX module: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_enable_module(handler->dev, BLADERF_MODULE_TX, false);
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if (status != 0) {
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fprintf(stderr, "Failed to enable TX module: %s\n", bladerf_strerror(status));
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return status;
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}
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handler->rx_stream_enabled = false;
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handler->tx_stream_enabled = false;
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return 0;
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}
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void rf_blade_flush_buffer(void *h)
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{
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}
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bool rf_blade_has_rssi(void *h)
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{
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return false;
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}
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float rf_blade_get_rssi(void *h)
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{
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return 0;
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}
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int rf_blade_open(char *args, void **h)
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{
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*h = NULL;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) malloc(sizeof(rf_blade_handler_t));
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if (!handler) {
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perror("malloc");
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return -1;
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}
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*h = handler;
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printf("Opening bladeRF...\n");
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int status = bladerf_open(&handler->dev, args);
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if (status) {
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fprintf(stderr, "Unable to open device: %s\n", bladerf_strerror(status));
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return status;
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}
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//bladerf_log_set_verbosity(BLADERF_LOG_LEVEL_VERBOSE);
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/* Configure the gains of the RX LNA and RX VGA1*/
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status = bladerf_set_lna_gain(handler->dev, BLADERF_LNA_GAIN_MAX);
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if (status != 0) {
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fprintf(stderr, "Failed to set RX LNA gain: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_set_rxvga1(handler->dev, 27);
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if (status != 0) {
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fprintf(stderr, "Failed to set RX VGA1 gain: %s\n", bladerf_strerror(status));
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return status;
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}
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status = bladerf_set_txvga1(handler->dev, BLADERF_TXVGA1_GAIN_MAX);
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if (status != 0) {
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fprintf(stderr, "Failed to set TX VGA1 gain: %s\n", bladerf_strerror(status));
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return status;
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}
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handler->rx_stream_enabled = false;
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handler->tx_stream_enabled = false;
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return 0;
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}
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int rf_blade_close(void *h)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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bladerf_close(handler->dev);
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return 0;
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}
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void rf_blade_set_master_clock_rate(void *h, double rate)
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{
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}
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bool rf_blade_is_master_clock_dynamic(void *h)
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{
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return true;
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}
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double rf_blade_set_rx_srate(void *h, double freq)
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{
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uint32_t bw;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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int status = bladerf_set_sample_rate(handler->dev, BLADERF_MODULE_RX, (uint32_t) freq, &handler->rx_rate);
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if (status != 0) {
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fprintf(stderr, "Failed to set samplerate = %u: %s\n", (uint32_t) freq, bladerf_strerror(status));
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return -1;
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}
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if (handler->rx_rate < 2000000) {
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status = bladerf_set_bandwidth(handler->dev, BLADERF_MODULE_RX, handler->rx_rate, &bw);
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if (status != 0) {
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fprintf(stderr, "Failed to set bandwidth = %u: %s\n", handler->rx_rate, bladerf_strerror(status));
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return -1;
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}
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} else {
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status = bladerf_set_bandwidth(handler->dev, BLADERF_MODULE_RX, handler->rx_rate*0.8, &bw);
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if (status != 0) {
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fprintf(stderr, "Failed to set bandwidth = %u: %s\n", handler->rx_rate, bladerf_strerror(status));
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return -1;
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}
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}
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printf("Set RX sampling rate %.2f Mhz, filter BW: %.2f Mhz\n", (float) handler->rx_rate/1e6, (float) bw/1e6);
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return (double) handler->rx_rate;
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}
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double rf_blade_set_tx_srate(void *h, double freq)
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{
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uint32_t bw;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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int status = bladerf_set_sample_rate(handler->dev, BLADERF_MODULE_TX, (uint32_t) freq, &handler->tx_rate);
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if (status != 0) {
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fprintf(stderr, "Failed to set samplerate = %u: %s\n", (uint32_t) freq, bladerf_strerror(status));
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return -1;
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}
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status = bladerf_set_bandwidth(handler->dev, BLADERF_MODULE_TX, handler->tx_rate, &bw);
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if (status != 0) {
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fprintf(stderr, "Failed to set bandwidth = %u: %s\n", handler->tx_rate, bladerf_strerror(status));
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return -1;
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}
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return (double) handler->tx_rate;
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}
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double rf_blade_set_rx_gain(void *h, double gain)
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{
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int status;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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status = bladerf_set_rxvga2(handler->dev, (int) gain);
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if (status != 0) {
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fprintf(stderr, "Failed to set RX VGA2 gain: %s\n", bladerf_strerror(status));
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return -1;
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}
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return rf_blade_get_rx_gain(h);
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}
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double rf_blade_set_tx_gain(void *h, double gain)
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{
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int status;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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status = bladerf_set_txvga2(handler->dev, (int) gain);
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if (status != 0) {
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fprintf(stderr, "Failed to set TX VGA2 gain: %s\n", bladerf_strerror(status));
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return -1;
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}
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return rf_blade_get_tx_gain(h);
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}
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double rf_blade_get_rx_gain(void *h)
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{
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int status;
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int gain;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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status = bladerf_get_rxvga2(handler->dev, &gain);
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if (status != 0) {
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fprintf(stderr, "Failed to get RX VGA2 gain: %s\n",
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bladerf_strerror(status));
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return -1;
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}
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return gain; // Add rxvga1 and LNA
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}
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double rf_blade_get_tx_gain(void *h)
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{
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int status;
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int gain;
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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status = bladerf_get_txvga2(handler->dev, &gain);
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if (status != 0) {
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fprintf(stderr, "Failed to get TX VGA2 gain: %s\n",
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bladerf_strerror(status));
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return -1;
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}
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return gain; // Add txvga1
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}
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double rf_blade_set_rx_freq(void *h, double freq)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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uint32_t f_int = (uint32_t) round(freq);
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int status = bladerf_set_frequency(handler->dev, BLADERF_MODULE_RX, f_int);
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if (status != 0) {
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fprintf(stderr, "Failed to set samplerate = %u: %s\n",
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(uint32_t) freq, bladerf_strerror(status));
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return -1;
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}
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f_int=0;
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bladerf_get_frequency(handler->dev, BLADERF_MODULE_RX, &f_int);
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printf("set RX frequency to %u\n", f_int);
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return freq;
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}
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double rf_blade_set_tx_freq(void *h, double freq)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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uint32_t f_int = (uint32_t) round(freq);
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int status = bladerf_set_frequency(handler->dev, BLADERF_MODULE_TX, f_int);
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if (status != 0) {
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fprintf(stderr, "Failed to set samplerate = %u: %s\n",
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(uint32_t) freq, bladerf_strerror(status));
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return -1;
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}
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f_int=0;
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bladerf_get_frequency(handler->dev, BLADERF_MODULE_TX, &f_int);
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printf("set TX frequency to %u\n", f_int);
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return freq;
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}
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void rf_blade_set_tx_cal(void *h, srslte_rf_cal_t *cal) {
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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bladerf_set_correction(handler->dev, BLADERF_MODULE_TX, BLADERF_CORR_FPGA_PHASE, cal->dc_gain);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_TX, BLADERF_CORR_FPGA_GAIN, cal->dc_phase);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_TX, BLADERF_CORR_LMS_DCOFF_I, cal->iq_i);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_TX, BLADERF_CORR_LMS_DCOFF_Q, cal->iq_q);
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}
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void rf_blade_set_rx_cal(void *h, srslte_rf_cal_t *cal) {
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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bladerf_set_correction(handler->dev, BLADERF_MODULE_RX, BLADERF_CORR_FPGA_PHASE, cal->dc_gain);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_RX, BLADERF_CORR_FPGA_GAIN, cal->dc_phase);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_RX, BLADERF_CORR_LMS_DCOFF_I, cal->iq_i);
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bladerf_set_correction(handler->dev, BLADERF_MODULE_RX, BLADERF_CORR_LMS_DCOFF_Q, cal->iq_q);
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}
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static void timestamp_to_secs(uint32_t rate, uint64_t timestamp, time_t *secs, double *frac_secs) {
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double totalsecs = (double) timestamp/rate;
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time_t secs_i = (time_t) totalsecs;
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if (secs) {
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*secs = secs_i;
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}
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if (frac_secs) {
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*frac_secs = totalsecs-secs_i;
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}
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}
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static void secs_to_timestamps(uint32_t rate, time_t secs, double frac_secs, uint64_t *timestamp) {
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double totalsecs = (double) secs + frac_secs;
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if (timestamp) {
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*timestamp = rate * totalsecs;
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}
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}
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void rf_blade_get_time(void *h, time_t *secs, double *frac_secs)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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struct bladerf_metadata meta;
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int status = bladerf_get_timestamp(handler->dev, BLADERF_MODULE_RX, &meta.timestamp);
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if (status != 0) {
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fprintf(stderr, "Failed to get current RX timestamp: %s\n",
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bladerf_strerror(status));
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}
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timestamp_to_secs(handler->rx_rate, meta.timestamp, secs, frac_secs);
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}
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int rf_blade_recv_with_time(void *h,
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void *data,
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uint32_t nsamples,
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bool blocking,
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time_t *secs,
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double *frac_secs)
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{
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rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
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struct bladerf_metadata meta;
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int status;
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memset(&meta, 0, sizeof(meta));
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meta.flags = BLADERF_META_FLAG_RX_NOW;
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if (2*nsamples > CONVERT_BUFFER_SIZE) {
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fprintf(stderr, "RX failed: nsamples exceeds buffer size (%d>%d)\n", nsamples, CONVERT_BUFFER_SIZE);
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return -1;
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}
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status = bladerf_sync_rx(handler->dev, handler->rx_buffer, nsamples, &meta, 2000);
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if (status) {
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fprintf(stderr, "RX failed: %s\n\n", bladerf_strerror(status));
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return -1;
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} else if (meta.status & BLADERF_META_STATUS_OVERRUN) {
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if (blade_error_handler) {
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srslte_rf_error_t error;
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error.opt = meta.actual_count;
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error.type = SRSLTE_RF_ERROR_OVERFLOW;
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blade_error_handler(error);
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} else {
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fprintf(stderr, "Overrun detected in scheduled RX. "
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"%u valid samples were read.\n\n", meta.actual_count);
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}
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}
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timestamp_to_secs(handler->rx_rate, meta.timestamp, secs, frac_secs);
|
|
srslte_vec_convert_if(handler->rx_buffer, data, 2048, 2*nsamples);
|
|
|
|
return nsamples;
|
|
}
|
|
|
|
int rf_blade_send_timed(void *h,
|
|
void *data,
|
|
int nsamples,
|
|
time_t secs,
|
|
double frac_secs,
|
|
bool has_time_spec,
|
|
bool blocking,
|
|
bool is_start_of_burst,
|
|
bool is_end_of_burst)
|
|
{
|
|
rf_blade_handler_t *handler = (rf_blade_handler_t*) h;
|
|
struct bladerf_metadata meta;
|
|
int status;
|
|
|
|
if (!handler->tx_stream_enabled) {
|
|
rf_blade_start_tx_stream(h);
|
|
}
|
|
|
|
if (2*nsamples > CONVERT_BUFFER_SIZE) {
|
|
fprintf(stderr, "TX failed: nsamples exceeds buffer size (%d>%d)\n", nsamples, CONVERT_BUFFER_SIZE);
|
|
return -1;
|
|
}
|
|
|
|
srslte_vec_convert_fi(data, handler->tx_buffer, 2048, 2*nsamples);
|
|
|
|
memset(&meta, 0, sizeof(meta));
|
|
if (is_start_of_burst) {
|
|
if (has_time_spec) {
|
|
secs_to_timestamps(handler->tx_rate, secs, frac_secs, &meta.timestamp);
|
|
} else {
|
|
meta.flags |= BLADERF_META_FLAG_TX_NOW;
|
|
}
|
|
meta.flags |= BLADERF_META_FLAG_TX_BURST_START;
|
|
}
|
|
if (is_end_of_burst) {
|
|
meta.flags |= BLADERF_META_FLAG_TX_BURST_END;
|
|
}
|
|
srslte_rf_error_t error;
|
|
bzero(&error, sizeof(srslte_rf_error_t));
|
|
|
|
status = bladerf_sync_tx(handler->dev, handler->tx_buffer, nsamples, &meta, 2000);
|
|
if (status == BLADERF_ERR_TIME_PAST) {
|
|
if (blade_error_handler) {
|
|
error.type = SRSLTE_RF_ERROR_LATE;
|
|
blade_error_handler(error);
|
|
} else {
|
|
fprintf(stderr, "TX failed: %s\n", bladerf_strerror(status));
|
|
}
|
|
} else if (status) {
|
|
fprintf(stderr, "TX failed: %s\n", bladerf_strerror(status));
|
|
return status;
|
|
} else if (meta.status == BLADERF_META_STATUS_UNDERRUN) {
|
|
if (blade_error_handler) {
|
|
error.type = SRSLTE_RF_ERROR_UNDERFLOW;
|
|
blade_error_handler(error);
|
|
} else {
|
|
fprintf(stderr, "TX warning: underflow detected.\n");
|
|
}
|
|
}
|
|
|
|
return nsamples;
|
|
}
|
|
|