coe file syntax

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COE File Syntax
' O+ p  G; U4 J9 b9 RThe following syntax displays the general form for a COE file:
Keyword =Value ; Optional Comment
Keyword =Value ; Optional Comment
<Radix_Keyword> =Value ; Optional Comment

<Data_Keyword> =Data_Value1, Data_Value2, Data_Value3;
/ _5 d' e2 \4 n* D0 ]( JThe following table describes COE file keywords for specifying radix values for data. Keywords are not case sensitive. For information on the specific keywords required for a core, please refer to that core’s data sheet.
. e$ ^& X3 {! H6 x7 j2 MCOE File Keywords for Radix Values
Keyword        Description
% ?0 Q$ t2 B$ Q. M  @RADIX        Used for non-memory cores to indicate the radix being used to specify the coefficients of the filter.
/ H: }: w! K) {" \5 [MEMORY_INITIALIZATION_RADIX        Used for memory initialization values to specify the radix used.
- W4 o# n. H! K$ x# ?  ?- @The following table describes COE file keywords for data values. Keywords are not case sensitive.
0 |; [$ t1 `6 G- s* r& _; o; nCOE File Keywords for Data Values
9 r0 Q; W) q& fKeyword        Description
# W+ O, N  p& Q7 e0 J' w1 u) ~COEFDATA        Used for filters to indicate that the data that follows comprises the coefficients of the filter.
MEMORY_INITIALIZATION_VECTOR        Used for block and distributed memories.
PATTERN        Used for Bit Correlator COE files.
1 _: X- K7 @7 b: |+ X: }BRANCH_LENGTH_VECTOR        Used in Interleaver COE files.
MEMDATA        Obsolete keyword.
Note :  Any text after a semicolon is treated as a comment and is ignored.
# w' i/ |  z4 Y9 t' o/ TOne of the following keywords must be the last keyword specified in the COE file:
COEFDATA
; W* b! H& ]5 N& C- N' e) k- D MEMORY_INITIALIZATION_VECTOR
1 P" B: V* Q* Z  n" f MEMDATA (an obsolete keyword, supported for backward compatibility)
3 c& b) C, h3 B% ~& E) w. HAny other keywords that follow are ignored.
! [! Z; [$ d+ T  aYou can find examples of COE files for the Distributed Arithmetic FIR Filter, Bit Correlator, Digital Down Converter, RAM-based Shift Register, and Distributed Memory in the $XILINX/coregen/data directory.
Below is a selection of the COE files from this area.
6 ?& E% b! t- U1 f5 K6 l5 W1 [: n******************************************************************
*************  Example of Virtex Bit Correlator.COE  *************
******************************************************************
; Sample .COE coefficient file for v2.0 and later
; versions of the Bit Correlator core.
;
6 a9 F0 v) Z' }6 M; In this core, a COE file is used to specify the value
; of the bit mask when the Pattern Mask option is selected.
% x- C# E1 b2 `' L0 u  r. ?& e4 |;
; Specifications:
' m5 X: z# h3 i! W( v, n8 X;
; - 19 taps, hexadecimal coefficients
) E9 C) H. \, }4 w" L; - Serial input data
8 m# X, p9 z! _6 {;
; Please refer to the datasheet for this core for more
; details on using the Mask option.
) L- J4 O1 y% i5 v6 X' Hradix = 16;
/ d* H3 G2 K( K" M1 \pattern = 3 0 3 1 0 1 1 3 0 2 2 2 3 0 1 1 3 0 3;
******************************************************************
" k( K, \" G) U7 d' x3 Q1 D*********  Example of Dual Port Block Memory .COE file  **********
******************************************************************
; Sample memory initialization file for Dual Port Block Memory,
; v3.0 or later.
;
  D9 ?6 l" r0 k; This .COE file specifies the contents for a block memory
; of depth=16, and width=4.  In this case, values are specified
; in hexadecimal format.
9 u1 S5 h+ L) E4 b5 n4 `" ememory_initialization_radix=2;
. Z1 m+ v/ O4 N5 t' Umemory_initialization_vector=
# k, _! p9 N+ S3 `+ a2 }1111,
3 D3 S1 @7 O$ h8 i4 [) S; l- t& G9 {1111,
1111,
0 e) ^- n2 I' v* w3 N& P1111,
1111,
0000,
0101,
0011,
0000,
  C' p9 f3 f: l/ ?6 A& b1111,
, L, e% d; g+ E% X. }9 A1111,
1111,
4 f" q9 A+ Q; R/ Q" V* X3 F, ?! E1111,
- O5 ~& l  b5 g8 R" i1111,
% `) L/ a+ S9 s& L1111,
1111;
******************************************************************
********  Example of Single Port Block Memory .COE file  *********
7 ^5 [. K$ l) r( U******************************************************************
; Sample memory initialization file for Single Port Block Memory,
; v3.0 or later.
;
  G, o8 w( \8 @+ _( ?  r; This .COE file specifies initialization values for a block
/ U3 R9 O& ~9 V3 }; memory of depth=16, and width=8. In this case, values are
" D8 `/ Q" P8 o) K! w+ h; specified in hexadecimal format.
' T! Q& z& X( Y, \  E% }memory_initialization_radix=16;
% u: w* Q, [: J1 s& z6 u, L4 {memory_initialization_vector=
ff,
, Y: v0 |/ r& b0 uab,
, ?* a; Z( i. Of0,
11,
11,
00,
  m+ n! y5 x* T9 K( j01,
$ t# Q8 l. H6 `# X% a/ U: H1 N+ yaa,
* T# B0 j! n3 e* ?5 Sbb,
; o! |& s/ i  V/ p% dcc,
dd,
ef,
4 g( p3 B6 B2 I5 D7 Tee,
ff,
# [8 ?) \) R* k8 S00,
0 U2 }4 L" p/ @ff;
******************************************************************
' U5 E) @4 i. ^8 n1 z8 V************  Example of Distributed Memory .COE file  ***********
******************************************************************
; Sample memory initialization file for Distributed Memory v2.0 and
; later.
: K& q  ?+ v, N; |- G% y# `9 Z4 @;
; This .COE file is NOT compatible with v1.0 of Distributed Memory Core.
;
; The example specifies initialization values for a memory of depth= 32,
; and width=16. In this case, values are specified in hexadecimal
& j$ ^. W/ q5 Z" N/ j; format.
: b! ~( t# w+ I+ l, L4 ]memory_initialization_radix = 16;
memory_initialization_vector = 23f4 0721 11ff ABe1 0001 1 0A 0
23f4 0721 11ff ABe1 0001 1 0A 0
23f4 721 11ff ABe1 0001 1 A 0
3 n, s1 v0 l, H+ [4 O! { 23f4 721 11ff ABe1 0001 1 A 0;
******************************************************************
) P3 _9 O9 i+ e8 J******  Example of Distributed Arithmetic FIR Filter .COE file ***
******************************************************************
; Example of a Distributed Arithmetic (DA) FIR Filter .COE file
9 g( B; }0 L$ M; with hex coefficients, 8 symmetrical taps, and 12-bit
6 B1 l0 X7 c6 \' ?6 S; coefficients.
;
; Compatible with all versions of the Distributed Arithmetic
; FIR Filter which supports Virtex and Spartan
3 I7 H" @# [3 M- l, Y; LRadix = 16;
CoefData= 346, EDA, 0D6, F91, F91, 0D6, EDA, 346;
5 ?- e2 Q( S; k$ k
, ?! Z  e7 U4 G5 Y$ e7 f
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