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oai
openairinterface5G
Commits
8934fed8
Commit
8934fed8
authored
Jul 08, 2016
by
Sandeep Kumar
Browse files
fixed issue with offset and sign extension
parent
5f0e15a4
Changes
3
Expand all
Hide whitespace changes
Inline
Side-by-side
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
;
u
int16_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
(
u
int16_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
=
(
u
int16_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
(
u
int16_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
=
(
u
int16_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
=
(
u
int16_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
;
u
int16_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
=
(
u
int16_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.
Click to expand it.
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(
u
int16_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))
...
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