Skip to content

GitLab

Commit 8934fed8 authored by Sandeep Kumar's avatar Sandeep Kumar
Browse files

fixed issue with offset and sign extension

parent 5f0e15a4
Expand all Hide whitespace changes
Inline Side-by-side
Showing with 45 additions and 60 deletions
openair1/PHY/LTE_TRANSPORT/if4_tools.c
View file @ 8934fed8
......@@ -29,11 +29,11 @@
/*! \file PHY/LTE_TRANSPORT/if4_tools.c
* \brief
* \author Fredrik Skretteberg, Tobias Schuster, Mauricio Gunther, S. Sandeep Kumar, Raymond Knopp
* \author S. Sandeep Kumar, Raymond Knopp
* \date 2016
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \email: ee13b1025@iith.ac.in, knopp@eurecom.fr
* \note
* \warning
*/
......@@ -44,7 +44,6 @@
#include "targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h"
// --- Careful to handle buffer memory --- RAW/UDP modes --- PRACH variables and data
void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type, int k) {
LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
int32_t **txdataF = eNB->common_vars.txdataF[0];
......@@ -56,35 +55,33 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
int slotoffsetF=0, blockoffsetF=0;
void *tx_buffer=NULL;
int16_t *data_block=NULL;
uint16_t *data_block=NULL, *i=NULL;
if (packet_type == IF4_PDLFFT) {
db_fulllength = 12*fp->N_RB_DL;
db_halflength = (db_fulllength)>>1;
slotoffsetF = (subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(uint16_t));
IF4_header_t *dl_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_dl_header(dl_header, frame, subframe);
for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {
// Do compression of the two parts and generate data blocks
for (element_id=0; element_id<db_halflength; element_id++) {
data_block[element_id] = lin2alaw[ (txdataF[0][blockoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id] |= lin2alaw[ (txdataF[0][blockoffsetF+element_id]>>16) + 32768 ]<<8;
data_block[element_id+db_halflength] = lin2alaw[ (txdataF[0][slotoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id+db_halflength] |= lin2alaw[ (txdataF[0][slotoffsetF+element_id]>>16) + 32768 ]<<8;
i = (uint16_t*) &txdataF[0][blockoffsetF+element_id];
data_block[element_id] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
i = (uint16_t*) &txdataF[0][slotoffsetF+element_id];
data_block[element_id+db_halflength] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
}
// Update information in generated packet
dl_header->frame_status &= ~(0x000f<<26);
dl_header->frame_status |= (symbol_id&0x000f)<<26;
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -101,29 +98,27 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
db_fulllength = 12*fp->N_RB_UL;
db_halflength = (db_fulllength)>>1;
slotoffsetF = (subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(uint16_t));
IF4_header_t *ul_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_ul_header(ul_header, frame, subframe);
for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {
// Do compression of the two parts and generate data blocks - rxdataF
for (element_id=0; element_id<db_halflength; element_id++) {
data_block[element_id] = lin2alaw[ (rxdataF[0][blockoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id] |= lin2alaw[ (rxdataF[0][blockoffsetF+element_id]>>16) + 32768 ]<<8;
data_block[element_id+db_halflength] = lin2alaw[ (rxdataF[0][slotoffsetF+element_id] & 0xffff) + 32768 ];
data_block[element_id+db_halflength] |= lin2alaw[ (rxdataF[0][slotoffsetF+element_id]>>16) + 32768 ]<<8;
i = (uint16_t*) &rxdataF[0][blockoffsetF+element_id];
data_block[element_id] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
i = (uint16_t*) &rxdataF[0][slotoffsetF+element_id];
data_block[element_id+db_halflength] = ((uint16_t) lin2alaw[*i]) | (lin2alaw[*(i+1)]<<8);
}
// Update information in generated packet
ul_header->frame_status &= ~(0x000f<<26);
ul_header->frame_status |= (symbol_id&0x000f)<<26;
// Write the packet(s) to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -142,7 +137,7 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
tx_buffer = malloc(MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + db_fulllength*sizeof(int16_t));
IF4_header_t *prach_header = (IF4_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
data_block = (uint16_t*)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t);
gen_IF4_prach_header(prach_header, frame, subframe);
......@@ -155,7 +150,6 @@ void send_IF4(PHY_VARS_eNB *eNB, int frame, int subframe, uint16_t packet_type,
// prachoffsetF += 2;
//}
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
symbol_id,
&tx_buffer,
......@@ -192,9 +186,8 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
void *rx_buffer=NULL;
IF4_header_t *packet_header=NULL;
int16_t *data_block=NULL;
uint16_t *data_block=NULL, *i=NULL;
// Read packet(s) from the fronthaul
if (eNB->ifdevice.trx_read_func(&eNB->ifdevice,
(int64_t*) packet_type,
&rx_buffer,
......@@ -204,43 +197,41 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
}
packet_header = (IF4_header_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES);
data_block = (int16_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES+sizeof_IF4_header_t);
data_block = (uint16_t*) (rx_buffer+MAC_HEADER_SIZE_BYTES+sizeof_IF4_header_t);
*frame = ((packet_header->frame_status)>>6)&0xffff;
*subframe = ((packet_header->frame_status)>>22)&0x000f;
if (*packet_type == IF4_PDLFFT) {
// Find and return symbol_number
*symbol_number = ((packet_header->frame_status)>>26)&0x000f;
// Calculate from received packet
slotoffsetF = (*symbol_number)*(fp->ofdm_symbol_size) + (*subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
// Do decompression of the two parts and generate txdataF
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
for (element_id=0; element_id<db_halflength; element_id++) {
txdataF[0][blockoffsetF+element_id] = alaw2lin[ (data_block[element_id] & 0xff) ];
txdataF[0][blockoffsetF+element_id] |= alaw2lin[ (data_block[element_id]>>8) ]<<16;
i = (uint16_t*) &txdataF[0][blockoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id]>>8) ];
txdataF[0][slotoffsetF+element_id] = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
txdataF[0][slotoffsetF+element_id] |= alaw2lin[ (data_block[element_id+db_halflength]>>8) ]<<16;
i = (uint16_t*) &txdataF[0][slotoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id+db_halflength]>>8) ];
}
} else if (*packet_type == IF4_PULFFT) {
// Find and return symbol_number
*symbol_number = ((packet_header->frame_status)>>26)&0x000f;
// Calculate from received packet
slotoffsetF = (*symbol_number)*(fp->ofdm_symbol_size) + (*subframe)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength;
blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength - 1;
// Do decompression of the two parts and generate rxdataF
for (element_id=0; element_id<db_halflength; element_id++) {
rxdataF[0][blockoffsetF+element_id] = alaw2lin[ (data_block[element_id] & 0xff) ];
rxdataF[0][blockoffsetF+element_id] |= alaw2lin[ (data_block[element_id]>>8) ]<<16;
i = (uint16_t*) &rxdataF[0][blockoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id]>>8) ];
rxdataF[0][slotoffsetF+element_id] = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
rxdataF[0][slotoffsetF+element_id] |= alaw2lin[ (data_block[element_id+db_halflength]>>8) ]<<16;
i = (uint16_t*) &rxdataF[0][slotoffsetF+element_id];
*i = alaw2lin[ (data_block[element_id+db_halflength] & 0xff) ];
*(i+1) = alaw2lin[ (data_block[element_id+db_halflength]>>8) ];
}
} else if (*packet_type == IF4_PRACH) {
......@@ -260,11 +251,9 @@ void recv_IF4(PHY_VARS_eNB *eNB, int *frame, int *subframe, uint16_t *packet_typ
void gen_IF4_dl_header(IF4_header_t *dl_packet, int frame, int subframe) {
// Set Type and Sub-Type
dl_packet->type = IF4_PACKET_TYPE;
dl_packet->sub_type = IF4_PDLFFT;
// Reset frame status
dl_packet->rsvd = 0;
// Set frame status
......@@ -276,11 +265,9 @@ void gen_IF4_dl_header(IF4_header_t *dl_packet, int frame, int subframe) {
void gen_IF4_ul_header(IF4_header_t *ul_packet, int frame, int subframe) {
// Set Type and Sub-Type
ul_packet->type = IF4_PACKET_TYPE;
ul_packet->sub_type = IF4_PULFFT;
// Leave reserved as it is
ul_packet->rsvd = 0;
// Set frame status
......@@ -292,11 +279,9 @@ void gen_IF4_ul_header(IF4_header_t *ul_packet, int frame, int subframe) {
void gen_IF4_prach_header(IF4_header_t *prach_packet, int frame, int subframe) {
// Set Type and Sub-Type
prach_packet->type = IF4_PACKET_TYPE;
prach_packet->sub_type = IF4_PRACH;
// Leave reserved as it is
prach_packet->rsvd = 0;
// Set LTE Prach configuration
......
openair1/PHY/TOOLS/alaw_lut.h
View file @ 8934fed8
This diff is collapsed.
targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h
View file @ 8934fed8
......@@ -59,7 +59,7 @@
#define RAW_PACKET_SIZE_BYTES(nsamps) (APP_HEADER_SIZE_BYTES + MAC_HEADER_SIZE_BYTES + PAYLOAD_SIZE_BYTES(nsamps))
// Packet sizes for IF4 interface format
#define DATA_BLOCK_SIZE_BYTES(scaled_nblocks) (sizeof(int16_t)*scaled_nblocks)
#define DATA_BLOCK_SIZE_BYTES(scaled_nblocks) (sizeof(uint16_t)*scaled_nblocks)
#define PRACH_BLOCK_SIZE_BYTES (sizeof(int16_t)*839*2) // FIX hard coded prach size (uncompressed)
#define RAW_IF4_PDLFFT_SIZE_BYTES(nblocks) (MAC_HEADER_SIZE_BYTES + sizeof_IF4_header_t + DATA_BLOCK_SIZE_BYTES(nblocks))
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment