aboutsummaryrefslogtreecommitdiffstats
path: root/Transceiver52M
diff options
context:
space:
mode:
Diffstat (limited to 'Transceiver52M')
-rw-r--r--Transceiver52M/Makefile.am3
-rw-r--r--Transceiver52M/Transceiver.cpp42
-rw-r--r--Transceiver52M/Transceiver.h14
-rw-r--r--Transceiver52M/proto_trxd.c77
-rw-r--r--Transceiver52M/proto_trxd.h48
5 files changed, 129 insertions, 55 deletions
diff --git a/Transceiver52M/Makefile.am b/Transceiver52M/Makefile.am
index 4adf474..791c586 100644
--- a/Transceiver52M/Makefile.am
+++ b/Transceiver52M/Makefile.am
@@ -47,7 +47,8 @@ COMMON_SOURCES = \
Transceiver.cpp \
ChannelizerBase.cpp \
Channelizer.cpp \
- Synthesis.cpp
+ Synthesis.cpp \
+ proto_trxd.c
libtransceiver_common_la_SOURCES = \
$(COMMON_SOURCES) \
diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index 5c5707b..6bbf3a3 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -31,7 +31,7 @@ extern "C" {
#include "osmo_signal.h"
#include "proto_trxd.h"
-#include <osmocom/core/bits.h>
+#include <osmocom/core/utils.h>
#include <osmocom/core/socket.h>
}
@@ -125,7 +125,7 @@ Transceiver::Transceiver(int wBasePort,
rssiOffset(wRssiOffset), stackSize(wStackSize),
mSPSTx(tx_sps), mSPSRx(rx_sps), mChans(chans), mEdge(false), mOn(false), mForceClockInterface(false),
mTxFreq(0.0), mRxFreq(0.0), mTSC(0), mMaxExpectedDelayAB(0), mMaxExpectedDelayNB(0),
- mWriteBurstToDiskMask(0)
+ mWriteBurstToDiskMask(0), mVersionTRXD(0)
{
txFullScale = mRadioInterface->fullScaleInputValue();
rxFullScale = mRadioInterface->fullScaleOutputValue();
@@ -971,36 +971,20 @@ void Transceiver::logRxBurst(size_t chan, const struct trx_ul_burst_ind *bi)
void Transceiver::driveReceiveFIFO(size_t chan)
{
- int msgLen;
- int TOAint; // in 1/256 symbols
-
struct trx_ul_burst_ind bi;
- if (!pullRadioVector(chan, &bi) || bi.idle)
+ if (!pullRadioVector(chan, &bi))
return;
-
- logRxBurst(chan, &bi);
-
- TOAint = (int) (bi.toa * 256.0 + 0.5); // round to closest integer
-
- char burstString[sizeof(struct trxd_hdr_v0) + bi.nbits + 2];
- struct trxd_hdr_v0* pkt = (struct trxd_hdr_v0*)burstString;
- pkt->common.version = 0;
- pkt->common.reserved = 0;
- pkt->common.tn = bi.tn;
- osmo_store32be(bi.fn, &pkt->common.fn);
- pkt->v0.rssi = bi.rssi;
- osmo_store16be(TOAint, &pkt->v0.toa);
-
- for (unsigned i = 0; i < bi.nbits; i++)
- pkt->soft_bits[i] = (char) round(bi.rx_burst[i] * 255.0);
-
- /* +1: Historical reason. There's an uninitizalied byte in there: pkt->soft_bits[bi.nbits] */
- pkt->soft_bits[bi.nbits + 1] = '\0';
-
- msgLen = write(mDataSockets[chan], burstString, sizeof(struct trxd_hdr_v0) + bi.nbits + 2);
- if (msgLen <= 0)
- LOGCHAN(chan, DTRXCTRL, WARNING) << "mDataSockets write(" << mCtrlSockets[chan] << ") failed: " << msgLen;
+ if (!bi.idle)
+ logRxBurst(chan, &bi);
+
+ switch (mVersionTRXD) {
+ case 0:
+ trxd_send_burst_ind_v0(chan, mDataSockets[chan], &bi);
+ break;
+ default:
+ OSMO_ASSERT(false);
+ }
}
void Transceiver::driveTxFIFO()
diff --git a/Transceiver52M/Transceiver.h b/Transceiver52M/Transceiver.h
index a66c962..aa2a716 100644
--- a/Transceiver52M/Transceiver.h
+++ b/Transceiver52M/Transceiver.h
@@ -34,19 +34,6 @@ extern "C" {
#include "config_defs.h"
}
-#define MAX_RX_BURST_BUF_SIZE EDGE_BURST_NBITS
-
-struct trx_ul_burst_ind {
- float rx_burst[MAX_RX_BURST_BUF_SIZE]; /* soft bits normalized 0..1 */
- unsigned nbits; // number of symbols per slot in rxBurst, not counting guard periods
- uint32_t fn; // TDMA frame number
- uint8_t tn; // TDMA time-slot number
- double rssi; // in dBFS
- double toa; // in symbols
- double noise; // noise level in dBFS
- bool idle; // true if no valid burst is included
-};
-
class Transceiver;
/** Channel descriptor for transceiver object and channel number pair */
@@ -229,6 +216,7 @@ private:
unsigned mMaxExpectedDelayAB; ///< maximum expected time-of-arrival offset in GSM symbols for Access Bursts (RACH)
unsigned mMaxExpectedDelayNB; ///< maximum expected time-of-arrival offset in GSM symbols for Normal Bursts
unsigned mWriteBurstToDiskMask; ///< debug: bitmask to indicate which timeslots to dump to disk
+ unsigned mVersionTRXD; ///< Format version to use for TRXD protocol communication
std::vector<TransceiverState> mStates;
diff --git a/Transceiver52M/proto_trxd.c b/Transceiver52M/proto_trxd.c
new file mode 100644
index 0000000..5cf22e6
--- /dev/null
+++ b/Transceiver52M/proto_trxd.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2019 sysmocom - s.f.m.c. GmbH
+ * All Rights Reserved
+ *
+ * SPDX-License-Identifier: AGPL-3.0+
+ *
+ * Author: Pau Espin Pedrol <pespin@sysmocom.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * See the COPYING file in the main directory for details.
+ */
+
+#include "proto_trxd.h"
+
+#include <osmocom/core/bits.h>
+
+static void trxd_fill_common(struct trxd_hdr_common *common, const struct trx_ul_burst_ind *bi, uint8_t version)
+{
+ common->version = version && 0x07;
+ common->reserved = 0;
+ common->tn = bi->tn;
+ osmo_store32be(bi->fn, &common->fn);
+}
+
+static void trxd_fill_v0_specific(struct trxd_hdr_v0_specific *v0, const struct trx_ul_burst_ind *bi)
+{
+ int toa_int;
+
+ /* in 1/256 symbols, round to closest integer */
+ toa_int = (int) (bi->toa * 256.0 + 0.5);
+ v0->rssi = bi->rssi;
+ osmo_store16be(toa_int, &v0->toa);
+}
+
+static void trxd_fill_burst_normalized255(uint8_t* soft_bits, const struct trx_ul_burst_ind *bi)
+{
+ unsigned i;
+ for (i = 0; i < bi->nbits; i++)
+ soft_bits[i] = (char) round(bi->rx_burst[i] * 255.0);
+}
+
+bool trxd_send_burst_ind_v0(size_t chan, int fd, const struct trx_ul_burst_ind *bi) {
+ int rc;
+
+ /* v0 doesn't support idle frames, they are simply dropped, not sent */
+ if(bi->idle)
+ return true;
+
+ /* +2: Historically (OpenBTS times), two extra non-used bytes are sent appeneded to each burst */
+ char buf[sizeof(struct trxd_hdr_v0) + bi->nbits + 2];
+ struct trxd_hdr_v0* pkt = (struct trxd_hdr_v0*)buf;
+
+ trxd_fill_common(&pkt->common, bi, 0);
+ trxd_fill_v0_specific(&pkt->v0, bi);
+ trxd_fill_burst_normalized255(&pkt->soft_bits[0], bi);
+
+ /* +1: Historical reason. There's an uninitizalied byte in there: pkt->soft_bits[bi->nbits] */
+ pkt->soft_bits[bi->nbits + 1] = '\0';
+
+ rc = write(fd, buf, sizeof(struct trxd_hdr_v0) + bi->nbits + 2);
+ if (rc <= 0) {
+ CLOGCHAN(chan, DMAIN, LOGL_NOTICE, "mDataSockets write(%d) failed: %d\n", fd, rc);
+ return false;
+ }
+ return true;
+}
diff --git a/Transceiver52M/proto_trxd.h b/Transceiver52M/proto_trxd.h
index 9da18db..2e5ad52 100644
--- a/Transceiver52M/proto_trxd.h
+++ b/Transceiver52M/proto_trxd.h
@@ -1,28 +1,52 @@
#pragma once
#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <math.h>
+
#include <osmocom/core/endian.h>
+#include "debug.h"
+
+#define MAX_RX_BURST_BUF_SIZE 444 /* 444 = EDGE_BURST_NBITS */
+
+struct trx_ul_burst_ind {
+ float rx_burst[MAX_RX_BURST_BUF_SIZE]; /* soft bits normalized 0..1 */
+ unsigned nbits; // number of symbols per slot in rxBurst, not counting guard periods
+ uint32_t fn; // TDMA frame number
+ uint8_t tn; // TDMA time-slot number
+ double rssi; // in dBFS
+ double toa; // in symbols
+ double noise; // noise level in dBFS
+ bool idle; // true if no valid burst is included
+};
+
+bool trxd_send_burst_ind_v0(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
+
+/* The latest supported TRXD header format version */
+#define TRX_DATA_FORMAT_VER 0
+
struct trxd_hdr_common {
#if OSMO_IS_LITTLE_ENDIAN
- uint8_t tn:3,
- reserved:1,
- version:4;
+ uint8_t tn:3,
+ reserved:1,
+ version:4;
#elif OSMO_IS_BIG_ENDIAN
- uint8_t version:4,
- reserved:1,
- tn:3;
+ uint8_t version:4,
+ reserved:1,
+ tn:3;
#endif
- uint32_t fn; /* big endian */
+ uint32_t fn; /* big endian */
} __attribute__ ((packed));
struct trxd_hdr_v0_specific {
- uint8_t rssi;
- uint16_t toa; /* big endian */
+ uint8_t rssi;
+ uint16_t toa; /* big endian */
} __attribute__ ((packed));
struct trxd_hdr_v0 {
- struct trxd_hdr_common common;
- struct trxd_hdr_v0_specific v0;
- uint8_t soft_bits[0];
+ struct trxd_hdr_common common;
+ struct trxd_hdr_v0_specific v0;
+ uint8_t soft_bits[0];
} __attribute__ ((packed));
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-16 13:49:09 +0000