coe file syntax

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COE File Syntax
: G$ P- x& C0 z4 u# c* @The following syntax displays the general form for a COE file:
Keyword =Value ; Optional Comment
& ]7 D2 J5 V; I6 G5 ZKeyword =Value ; Optional Comment
; x, K! l3 o+ o! y& H<Radix_Keyword> =Value ; Optional Comment
5 Q3 `( ]  w8 j1 [* S& {# C
<Data_Keyword> =Data_Value1, Data_Value2, Data_Value3;
The 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.
COE File Keywords for Radix Values
Keyword        Description
3 p2 x/ Y; h5 q6 E) T/ xRADIX        Used for non-memory cores to indicate the radix being used to specify the coefficients of the filter.
MEMORY_INITIALIZATION_RADIX        Used for memory initialization values to specify the radix used.
The following table describes COE file keywords for data values. Keywords are not case sensitive.
5 k- N5 T1 T" S9 g, PCOE File Keywords for Data Values
7 K3 f4 x* n) x8 wKeyword        Description
" E9 n7 |+ c/ k0 Q% R8 O: zCOEFDATA        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.
" L; O  b4 D# W, a& G, gBRANCH_LENGTH_VECTOR        Used in Interleaver COE files.
MEMDATA        Obsolete keyword.
Note :  Any text after a semicolon is treated as a comment and is ignored.
One of the following keywords must be the last keyword specified in the COE file:
COEFDATA
8 B1 }) u) t% I  ]9 \# v MEMORY_INITIALIZATION_VECTOR
( _4 F1 e& M; |) V MEMDATA (an obsolete keyword, supported for backward compatibility)
5 B8 d9 e: \- v1 \- pAny other keywords that follow are ignored.
You 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 $XILINX/coregen/data directory.
Below is a selection of the COE files from this area.
******************************************************************
*************  Example of Virtex Bit Correlator.COE  *************
4 t6 I" e  j0 r* D: e$ p3 Q: N******************************************************************
+ w; J/ l5 ]  l  i0 g; Sample .COE coefficient file for v2.0 and later
; versions of the Bit Correlator core.
;
; In this core, a COE file is used to specify the value
+ K  s% D! v  B% r+ h1 |3 Z4 [9 e; of the bit mask when the Pattern Mask option is selected.
;
; Specifications:
;
; - 19 taps, hexadecimal coefficients
; - Serial input data
;
- Q+ }4 c) M7 A1 g" v- E; Please refer to the datasheet for this core for more
; details on using the Mask option.
radix = 16;
pattern = 3 0 3 1 0 1 1 3 0 2 2 2 3 0 1 1 3 0 3;
1 R& b+ A+ W+ @% Z9 T******************************************************************
4 K' v0 c7 e' |*********  Example of Dual Port Block Memory .COE file  **********
******************************************************************
; Sample memory initialization file for Dual Port Block Memory,
' e) z) p9 P3 r* h; v3.0 or later.
: n( p) d  A  A0 ^;
; This .COE file specifies the contents for a block memory
! P, f$ D7 E) W6 o; of depth=16, and width=4.  In this case, values are specified
# u, l1 M/ a/ R) {, O$ c1 [" a; in hexadecimal format.
+ A+ ~$ t5 ?& omemory_initialization_radix=2;
memory_initialization_vector=
1111,
1111,
1111,
1111,
1111,
8 Q1 @5 Y. v; ]5 C. h, \0000,
% g9 e( Y2 \: b5 Q3 c. l' a( X0101,
; Y7 j* L9 D/ e& ]" p: n1 r3 `0011,
# ~7 O8 X" G( E8 i3 ^0000,
1111,
- i8 A6 Z) B1 R* G1111,
1111,
1111,
2 O# o" n4 r- m1111,
1111,
/ k5 G( r- Q( L9 S& z8 T) v1111;
2 J( G1 [% ]. V******************************************************************
********  Example of Single Port Block Memory .COE file  *********
" J2 d4 s" Z8 ~$ h9 f, e+ o6 @5 C******************************************************************
$ W' t* o- p! K/ H, d3 o! L; Sample memory initialization file for Single Port Block Memory,
. K" j8 M' W# g. N( q; N; v3.0 or later.
: e& d) P: F% R+ e5 }8 X; c' {;
" F' w0 t1 [0 ?! b; This .COE file specifies initialization values for a block
( R; o/ b+ H; i/ s( _0 z; memory of depth=16, and width=8. In this case, values are
; specified in hexadecimal format.
memory_initialization_radix=16;
- B# W2 V0 y7 g& v- rmemory_initialization_vector=
% [. a& h+ r' @$ R0 q6 O0 @; vff,
ab,
f0,
11,
11,
5 w4 \9 w9 U1 C1 e4 Z- }00,
01,
: I: J$ j; w. o2 E: i6 ~: J; F7 paa,
% I5 A2 T8 Y, Q9 q3 E3 g! n* \bb,
cc,
dd,
ef,
ee,
ff,
. `- Z; l: `+ _: \) X00,
7 |; U% _2 l9 g  b3 \& wff;
# M6 v$ e0 M2 t3 \******************************************************************
$ b  C2 r3 d. M* G************  Example of Distributed Memory .COE file  ***********
  U* Z6 ?1 K8 x' s******************************************************************
' T9 t3 |& R6 W3 [4 V( ]; Sample memory initialization file for Distributed Memory v2.0 and
; later.
;
# j2 e% G% a3 y" d' i2 Y. ]; This .COE file is NOT compatible with v1.0 of Distributed Memory Core.
;
0 r# h% L% \2 B; The example specifies initialization values for a memory of depth= 32,
; and width=16. In this case, values are specified in hexadecimal
; format.
4 ^  Q% `9 B. pmemory_initialization_radix = 16;
memory_initialization_vector = 23f4 0721 11ff ABe1 0001 1 0A 0
, d6 ^4 z$ Z* g1 K 23f4 0721 11ff ABe1 0001 1 0A 0
23f4 721 11ff ABe1 0001 1 A 0
23f4 721 11ff ABe1 0001 1 A 0;
******************************************************************
******  Example of Distributed Arithmetic FIR Filter .COE file ***
******************************************************************
$ j) y' T+ t: e+ P* ?6 s; Example of a Distributed Arithmetic (DA) FIR Filter .COE file
- q* w' ]7 A- I" `% `3 T, X; with hex coefficients, 8 symmetrical taps, and 12-bit
' P+ ]1 m% C: o2 v$ s/ K" c" J8 k; coefficients.
;
. E0 F) C! N: c; Compatible with all versions of the Distributed Arithmetic
; FIR Filter which supports Virtex and Spartan
: i1 G4 ~1 {1 u' v, J+ R% ORadix = 16;
CoefData= 346, EDA, 0D6, F91, F91, 0D6, EDA, 346;

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