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2019-11-20 15:00 |
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library ieee;
" j. k" U' L* ruse IEEE.std_logic_1164.all;: Z5 j# O1 h6 W* D
use IEEE.std_logic_unsigned.all;) \# ^" O p P T
use work.lcdchar.all;% x3 _. A4 k7 u1 d# C. s# x
- w8 ~/ }# s1 B+ q/ B. r s0 sentity display12864 is --LCD12864 display2 \0 c5 ^9 y6 F0 t
generic( fclk : integer :=50000000);
! U L% d D( J8 x7 \9 E" K port(9 }* }7 S+ f- m# ~& Y
n_rst : in std_logic;
! D+ U4 x8 L# I& ~! J clk_in : in std_logic;
3 P6 h) c- T: ] en : in std_logic;
2 [& u) s( a8 f- @# U SID : out std_logic;/ `8 ^" a/ r/ A& C; x, `
SCLK : out std_logic
& _$ a! F6 w, @8 a+ w );
; [' j' C7 ?0 q4 ^4 M3 x/ R0 ]end display12864;+ I9 N: T/ t* f1 h
' v8 \4 W$ a: m2 F; s1 Y& V
architecture rtl of display12864 is
$ A6 T- L+ m# H
$ V: D$ ~( `& i! f2 dconstant div_num : integer :=fclk/500000;
' H @5 t5 c* s9 c" v8 C1 z7 x/ k6 Z/ ^* ]" p
--attention : '\' and '"' can't be displayed.6 Z; h8 h, o2 m3 p( P) H/ [
constant line1_str : string:=" test1 ";0 [( i9 f/ P& C& d/ ?' v$ o* t
constant line2_str : string:=" 2 ";
0 t: Z( u+ G: Z% Oconstant line3_str : string:=" 3 ";+ ~7 y3 G6 @% e$ O0 F2 C
constant line4_str : string:=" 4 ";
3 B9 n( x! q5 h! Q8 C* Y Q- Q
% Q# ~) a* w# f: h! ]signal clk_500KHz : std_logic;( j7 x9 M2 P( J; X, P
signal LCD_cnt : integer range 0 to 71;
$ g+ K& Y, [# z/ e9 P- ]2 V0 lsignal LCD_Data : std_logic_vector(7 downto 0);
Q4 k( M2 R( q9 t/ J" Msignal rs,LCD_cnt_en: std_logic;2 N$ ]5 `- W: S5 [' a! O& S
, T; z$ a8 J6 ~4 z" }
signal clr : std_logic;! C: ?4 b5 C2 [$ n$ h1 s" {
signal bit_cnt : integer range 0 to 25;$ E, W0 K3 j E* @/ ~
signal delay_over : std_logic;
5 r% i3 w% ?8 c6 Y+ Wconstant delay_10ms : integer := 500000/100;--delay 10 ms
/ b! P+ A7 x/ w" Uconstant delay_1ms : integer := 500000/1000;--delay 1 ms6 ~; ~1 R, q- I8 ^& o
begin
* R; p& S$ \( y7 ^) O$ o0 l/ w2 F8 C2 A; g
--frequency division
7 o3 ]. s7 k, ]4 a# |# [3 z6 v process(clk_in,n_rst) ' ^- O5 U$ U: l
variable div_cnt : integer range 0 to div_num-1 ;
4 U* X }. a2 ` begin: G3 u8 k! L! C9 ]5 \6 m/ C
if(n_rst='0')then4 h; X0 ~8 C0 E! x2 ^
div_cnt:=0;
5 O9 b# W& S9 n6 E5 }1 n; ?% R) q elsif(clk_in'event and clk_in='1') then
+ I& U5 _& m7 o if(en='1')then9 J9 x0 x- [& W" i8 ], d* |
if(div_cnt>=div_num-1) then
$ M" C% Z$ V% A7 @ div_cnt:=0;
2 s9 o6 B% ?8 K7 Z/ o; ^9 B- w! Z7 g else2 d) |+ t- A) E2 e8 J l
if (div_cnt < div_num/2) then
$ ^" D, v1 r" L/ r; u! Q G clk_500KHz<='1';
% m' F/ m4 ~1 n, s4 I else / {7 E9 W6 P& F- Q1 n
clk_500KHz<='0';' G8 k. S5 k3 ~' {8 D' d
end if;. w5 F; R4 [. i! ^0 @, Q$ g
div_cnt:=div_cnt + 1;) \/ e6 v/ U8 G5 @" _
end if;7 G, n5 `9 T% P3 b& v
end if;9 D* m+ v2 i/ ?
end if;
- r3 [: }7 f1 B6 m end process;
/ E% G8 J8 z0 n8 z& r2 e% M% G/ T& R1 j: _* p! h# p3 r' k* v s% h
process(clk_500KHz,n_rst)
1 c p0 a1 ]5 ` @: |2 N begin |& K0 {1 x0 A5 _0 n8 j
if(n_rst='0')then
: a8 S' I& Z+ N3 t LCD_cnt<=0;
0 J* U/ x( B8 Y t9 ? rs<='0';
3 }7 e! ^5 {, F1 w- v9 f2 e" e LCD_Data<=x"00";* Y$ E( X* h5 f3 I6 E* f- c4 j, [
elsif(clk_500KHz'event and clk_500KHz='1')then; ? q' a+ z4 T
if(en='1')then
7 {) }$ q8 e0 E' D) ?, I9 ?. j1 | if(LCD_cnt>=71)then
% G" Y+ ^4 F0 _$ w- F LCD_cnt<=4;% L3 g, F$ a9 ~; L+ ~
elsif(delay_over='1')then
. H. o3 \" H! x! L! U LCD_cnt<=LCD_cnt+1;
) v9 m+ K" o6 |# G else
- {; q% ^2 o% U6 N+ N* L LCD_cnt<=LCD_cnt;% s) Z1 ^9 ]9 c
end if;
- H' I0 X! W* B% n9 I7 Z" a case LCD_cnt is
) m7 F3 {' M$ Z# X/ d: Z5 M when 0 => rs<='0';LCD_Data<=x"30";1 d: Y% \ Z b
when 1 => rs<='0';LCD_Data<=x"01";4 r% U, f& u4 V4 H3 |+ S
when 2 => rs<='0';LCD_Data<=x"06";
& L4 _3 w; M! ^1 |4 K when 3 => rs<='0';LCD_Data<=x"0c";
4 M+ Q0 Y" e# o2 G, T1 r& M. G
! H" n+ f! m/ n when 4 => rs<='0';LCD_Data<=x"80"; --first line' h% \0 U, [( N8 ^
when 5 => rs<='1';LCD_Data<=str2vector(line1_str,1);, r- e# a' B4 w% i: \5 N4 Z$ o+ J" }' n
when 6 => rs<='1';LCD_Data<=str2vector(line1_str,2);
2 c$ q: v p, N. K when 7 => rs<='1';LCD_Data<=str2vector(line1_str,3);
/ ?% n" r5 J6 }, Y when 8 => rs<='1';LCD_Data<=str2vector(line1_str,4);
/ d) [1 g+ G! M3 d when 9 => rs<='1';LCD_Data<=str2vector(line1_str,5);
) r, Q; O8 t# X: P" q7 n when 10 => rs<='1';LCD_Data<=str2vector(line1_str,6);$ y2 H- i3 i% M! x/ ?, O
when 11 => rs<='1';LCD_Data<=str2vector(line1_str,7);% @6 l. ~" u3 T# E
when 12 => rs<='1';LCD_Data<=str2vector(line1_str,8);: T, V1 n, q+ m' X2 N5 Q" n# f8 h
when 13 => rs<='1';LCD_Data<=str2vector(line1_str,9);4 u# w$ K* ?6 E, Y
when 14 => rs<='1';LCD_Data<=str2vector(line1_str,10);
! M; @9 B: X O& X k; H, W when 15 => rs<='1';LCD_Data<=str2vector(line1_str,11);
7 B# l2 D' E, `. z when 16 => rs<='1';LCD_Data<=str2vector(line1_str,12);0 Y7 v E8 y( l/ \+ R
when 17 => rs<='1';LCD_Data<=str2vector(line1_str,13);8 t& p1 ], v6 m. v8 c
when 18 => rs<='1';LCD_Data<=str2vector(line1_str,14);
7 O% }) Z& O/ v( K) Y. } when 19 => rs<='1';LCD_Data<=str2vector(line1_str,15);$ B0 @" s2 t0 G0 O3 p
when 20 => rs<='1';LCD_Data<=str2vector(line1_str,16);
9 v: Y7 y* n1 g8 i! F
! G* A) \# D2 d4 J when 21 => rs<='0';LCD_Data<=(x"90"); --second line
: b4 ]7 o4 l8 L when 22 => rs<='1';LCD_Data<=str2vector(line2_str,1);
% @ v+ J+ t2 c$ r7 ` when 23 => rs<='1';LCD_Data<=str2vector(line2_str,2);
9 l X) T5 C/ n8 \0 P$ T when 24 => rs<='1';LCD_Data<=str2vector(line2_str,3);- }3 t# j4 d& Z X' o! [% X
when 25 => rs<='1';LCD_Data<=str2vector(line2_str,4);$ |( P5 e% @/ u9 L3 c0 z! ^/ z
when 26 => rs<='1';LCD_Data<=str2vector(line2_str,5);' ^1 k! e6 W. G' f, m
when 27 => rs<='1';LCD_Data<=str2vector(line2_str,6);
' _, \+ x9 v0 W( Q- E! f* S when 28 => rs<='1';LCD_Data<=str2vector(line2_str,7);2 G! c+ @8 {1 R) _1 a2 F) J& |+ F
when 29 => rs<='1';LCD_Data<=str2vector(line2_str,8);
; U* X O; s, H8 H( ]" X V when 30 => rs<='1';LCD_Data<=str2vector(line2_str,9);1 C; V" y2 }1 J( a
when 31 => rs<='1';LCD_Data<=str2vector(line2_str,10);
! }9 X! C R2 J/ G when 32 => rs<='1';LCD_Data<=str2vector(line2_str,11);
8 I0 Q% c# B) j ~: F# A4 E' q when 33 => rs<='1';LCD_Data<=str2vector(line2_str,12);- y) r/ z3 m6 j1 J0 Y- ]
when 34 => rs<='1';LCD_Data<=str2vector(line2_str,13);" E. R* |* J$ `5 } J% h
when 35 => rs<='1';LCD_Data<=str2vector(line2_str,14);" c; E4 d% ~) c5 K2 D9 `! C
when 36 => rs<='1';LCD_Data<=str2vector(line2_str,15);& j* ?/ S; U; i: p% h2 M, o. v, Q
when 37 => rs<='1';LCD_Data<=str2vector(line2_str,16);
8 ]3 c2 S2 Z- _. ~
: A1 p/ W4 S8 M; g! y9 O4 {$ g when 38 => rs<='0';LCD_Data<=(x"88"); --third line9 o. c9 B% K( T3 t6 N
when 39 => rs<='1';LCD_Data<=str2vector(line3_str,1);
" K6 h" q" V- E# r when 40 => rs<='1';LCD_Data<=str2vector(line3_str,2);' \9 x! U0 b" ?: o1 G
when 41 => rs<='1';LCD_Data<=str2vector(line3_str,3);/ j2 L7 b" k0 |
when 42 => rs<='1';LCD_Data<=str2vector(line3_str,4);6 p: r* X( [3 N, @6 V# C* O
when 43 => rs<='1';LCD_Data<=str2vector(line3_str,5);
; N& J" W* W$ l/ i- m: r6 H9 l when 44 => rs<='1';LCD_Data<=str2vector(line3_str,6);
8 B5 t7 S1 g; }0 e2 S: } when 45 => rs<='1';LCD_Data<=str2vector(line3_str,7);2 i& Y( |& j" V* d" l, ^
when 46 => rs<='1';LCD_Data<=str2vector(line3_str,8);. L# M$ I+ W- m. F; M O
when 47 => rs<='1';LCD_Data<=str2vector(line3_str,9);; W8 R$ f* p0 k% I9 B
when 48 => rs<='1';LCD_Data<=str2vector(line3_str,10);1 A v( I2 g* d: P! v" ]0 V
when 49 => rs<='1';LCD_Data<=str2vector(line3_str,11);# t# T0 p$ |* y0 c; w: }, `9 o5 U
when 50 => rs<='1';LCD_Data<=str2vector(line3_str,12);2 a" l: _, I E
when 51 => rs<='1';LCD_Data<=str2vector(line3_str,13);' Q; V9 S" T/ p N9 i6 j* K; z* O
when 52 => rs<='1';LCD_Data<=str2vector(line3_str,14);# P6 F( o! g0 A
when 53 => rs<='1';LCD_Data<=str2vector(line3_str,15);
4 i% g' L# `, T( @9 r N when 54 => rs<='1';LCD_Data<=str2vector(line3_str,16);
+ w' c" X T- C) {
: C% k. L" a, }. E when 55 => rs<='0';LCD_Data<=(x"98"); --forth line5 h, u0 G5 O7 Y* f$ K" s
when 56 => rs<='1';LCD_Data<=str2vector(line4_str,1);
: F& X; |; t, c, i5 L1 L# ` when 57 => rs<='1';LCD_Data<=str2vector(line4_str,2);
5 g. n$ m5 c8 G) U7 d8 y, G when 58 => rs<='1';LCD_Data<=str2vector(line4_str,3);
+ r/ n; ^' }$ \6 a- j- @ when 59 => rs<='1';LCD_Data<=str2vector(line4_str,4);
# q3 t* P3 {( f* C; s( k5 j when 60 => rs<='1';LCD_Data<=str2vector(line4_str,5);6 ?4 | b8 B7 m! l* F$ o% J
when 61 => rs<='1';LCD_Data<=str2vector(line4_str,6);6 v% q4 q$ v1 h# R$ Z' R
when 62 => rs<='1';LCD_Data<=str2vector(line4_str,7);
% S! }! g7 b0 d; |* n$ B when 63 => rs<='1';LCD_Data<=str2vector(line4_str,8);
! ]' w6 n6 R3 J4 S6 O when 64 => rs<='1';LCD_Data<=str2vector(line4_str,9);& P7 {) i( Y8 }& T# C
when 65 => rs<='1';LCD_Data<=str2vector(line4_str,10);- w. d( X. H+ E7 R
when 66 => rs<='1';LCD_Data<=str2vector(line4_str,11);
4 R% c+ l3 d, ?% | when 67 => rs<='1';LCD_Data<=str2vector(line4_str,12);+ S& ] b j2 `2 a7 J& [: m
when 68 => rs<='1';LCD_Data<=str2vector(line4_str,13);9 H f( n( D5 B9 n7 |
when 69 => rs<='1';LCD_Data<=str2vector(line4_str,14);
" x8 a. h! ]2 b/ O( L4 Y( l when 70 => rs<='1';LCD_Data<=str2vector(line4_str,15);5 \4 ~. U T. C' o2 {$ @3 }- a* Q
when 71 => rs<='1';LCD_Data<=str2vector(line4_str,16);
$ \# V6 e6 h4 }; J! \8 H * ^' o3 T) G$ d
when others => rs<='1';LCD_Data<=x"00"; % u% j, u! E. ?- e
end case;) Q8 a% L! M$ h/ n5 g& c
end if;
1 f3 O: Q' d: f- y end if;
6 h7 O. c9 O ^( ~( a end process;
' t& x( g& f/ @& X G0 z/ H+ W( I% Z4 n
--delay 10 ms counter 3 e( W- I! R1 Z7 H0 Y1 N
process(clk_500KHz,n_rst)
0 M( a4 T% x( @- g( p% O variable cnt : integer range 0 to delay_10ms-1 ;
, W* ~) y% R, v7 i! y( U begin
( f% P; R6 C+ O. {9 E) ]1 M if(n_rst='0')then
* L0 X* `- B6 r9 C" }- K( N cnt:=0;
3 H/ m; s! A" Q. |4 c+ I' o: q delay_over<='0';9 Y) o* V/ t9 E5 `$ d3 m. D+ L4 {
clr<='1';
1 U9 i% T. Q9 u, P; d elsif(clk_500KHz'event and clk_500KHz='1') then
! t3 t- t% S' d+ F if(LCD_cnt<=4)then
" s2 o* m( j" }% j( o% W# F if(cnt=delay_10ms-1)then, w6 n z1 ^* j7 Y. u
delay_over<='1';
& d# X0 _7 q: y clr<='1';
$ A# o. o1 M) W6 a l cnt:=0;
) ?9 R# _; g' N4 r else6 R) m, z! F' P5 d" g
delay_over<='0';
/ v0 l5 | j- x2 O% K clr<='0';! b. M& M4 s! r; e: q6 Y
if(bit_cnt=25)then
0 M/ ~, w9 q/ K+ y2 z% q$ T cnt:=cnt+1;
6 K* ^& G1 D3 [$ A5 j& R end if;
+ u5 k$ N* V3 f4 f8 w' M9 p2 g8 ]" B end if;
7 _5 L) o% o- [+ G3 {% z! G else
" u5 m1 H$ e0 ?2 o& r( O! k# Z& @ if(cnt=delay_1ms-1)then1 _8 P4 |1 t3 V9 B2 o% Z
delay_over<='1';& m- F8 N" Z$ v' f5 f
clr<='1';
$ Y9 i5 o$ o5 x/ x; I cnt:=0;; A. u: X& C7 V2 f
else
+ H0 v1 H: _; h1 A/ a+ o delay_over<='0';
& O3 m3 t" _* C clr<='0';! D0 w0 S" d& y, Z
if(bit_cnt=25)then
; J8 Z) I& H. S# f* @: w' I cnt:=cnt+1;, s' _2 c) f t
end if;
a/ ^8 A# X; P: X- Q0 @ end if;
. G+ j4 W1 y, w+ ^' a end if;
5 f; s: ?1 t" h end if;) P: ~: A- T! F. O
end process;
+ N' r( e. P& z3 K7 s' C 7 Z1 I1 R+ B# A! u* Y& p2 p, P; ?
--output SCLK
! ~9 i6 y5 i- [/ f3 P5 a process(clk_in,n_rst)
& C% U8 C: M1 r begin
7 K6 Y5 Z; d4 p if(n_rst='0')then2 T8 Y* [3 R) \
SCLK<='0';* l& ~0 r* j0 y( f: p. V
elsif(clk_in'event and clk_in='1') then
0 \# q- g' Y; V% L5 b/ @' c: O4 t if(en='1')then$ F; S/ x+ Q' M1 i4 r
if(bit_cnt>0 and bit_cnt<25)then0 l b0 S2 ?) v$ H7 G9 V
SCLK <= not clk_500KHz;6 W2 N9 O: `4 w
else
) D. d3 A+ T$ m/ u0 ] SCLK <= '0'; t) e" i* Y" g* f% G* O* |/ [: t
end if;
" m: L, I s, `4 n# k+ B end if;% M( }6 d& f. A8 p/ V; l0 D
end if;$ z* R1 M, M, k% ?
end process;! L- Z. g" x& g: m5 u8 `
* Y( K4 P* g) h1 c% r, u--output SID
4 o8 N; p2 o' a7 B. |$ M9 k process(clk_500KHz,n_rst)
) m$ a" T# P5 c8 H' e1 p" C begin, [: B" Q A; o0 i5 x
if(n_rst='0')then
% @: s; S& f. V; v SID<='0';/ ?1 D3 F8 }7 i, A& z& J* @
bit_cnt<=0;
' w+ x- {2 O6 a r3 g" ] elsif(clk_500KHz'event and clk_500KHz='1')then
/ Y9 {* G7 Z) q8 w. o8 w if(clr='1')then
" c+ g5 k' I3 s) T& J SID<='0';
9 B5 C# }# M* v) B bit_cnt<=0;0 ?% u B& k( r: k) K, ^1 h# [" J8 b
else
4 }2 p/ \7 F5 B) ?" s6 A case bit_cnt is
; ^ u0 _4 [! K F+ F- _2 S when 0 => SID<='1';bit_cnt<=bit_cnt+1;6 n8 R3 C; m9 v/ E, f7 {
when 1 => SID<='1';bit_cnt<=bit_cnt+1;
0 V- a8 B: p7 W when 2 => SID<='1';bit_cnt<=bit_cnt+1;& A" x& Q4 y$ j5 N
when 3 => SID<='1';bit_cnt<=bit_cnt+1;
- Z: G& ~! m( u. `! d when 4 => SID<='1';bit_cnt<=bit_cnt+1;
- T. ^1 J, H6 ~* S4 h- _ when 5 => SID<='0';bit_cnt<=bit_cnt+1;' g5 k Y# d9 h% [0 I9 @
when 6 => SID<=rs ;bit_cnt<=bit_cnt+1;
- c) l1 t8 s- P+ X0 d" y when 7 => SID<='0';bit_cnt<=bit_cnt+1;+ `5 G# X+ ?- o, B. R: k
when 8 => SID<=LCD_Data(7);bit_cnt<=bit_cnt+1;1 r& R; N( \' F4 {1 Z1 Y a
when 9 => SID<=LCD_Data(6);bit_cnt<=bit_cnt+1;
7 N* Y8 ~: B g! @1 c! v, e+ v when 10 => SID<=LCD_Data(5);bit_cnt<=bit_cnt+1;
9 a/ y$ w( h# I0 ?; W when 11 => SID<=LCD_Data(4);bit_cnt<=bit_cnt+1;
, U f7 ?9 E- ` when 12 => SID<='0';bit_cnt<=bit_cnt+1;, x: F v/ ]! g' T7 m
when 13 => SID<='0';bit_cnt<=bit_cnt+1;
7 C4 B+ f, W9 J* | when 14 => SID<='0';bit_cnt<=bit_cnt+1;7 V- v% @6 Q& K) Z8 [' x4 x1 H, u
when 15 => SID<='0';bit_cnt<=bit_cnt+1;
) i) f1 ^$ X& Z' j6 F+ W$ b when 16 => SID<=LCD_Data(3);bit_cnt<=bit_cnt+1;; n8 U0 [* D! p
when 17 => SID<=LCD_Data(2);bit_cnt<=bit_cnt+1;( G8 c0 h7 ^/ u: f
when 18 => SID<=LCD_Data(1);bit_cnt<=bit_cnt+1;& G) u r w- {# f; P: b
when 19 => SID<=LCD_Data(0);bit_cnt<=bit_cnt+1;
1 `4 T1 t# v7 Q) `0 r1 Y9 o$ e when 20 => SID<='0';bit_cnt<=bit_cnt+1;
5 {. i9 n6 C! f# v when 21 => SID<='0';bit_cnt<=bit_cnt+1;! a* t3 k8 t& t- H/ Z$ z( B/ V
when 22 => SID<='0';bit_cnt<=bit_cnt+1;
0 t$ i6 a5 }5 Q$ Y- s2 Y, z$ i1 ^; Z! D when 23 => SID<='0';bit_cnt<=bit_cnt+1;
3 |& Q' B7 ]" k0 _7 h; E when 24 => SID<='0';bit_cnt<=bit_cnt+1;( k8 ~2 g5 o2 U R! O6 {
when 25 => SID<='0';bit_cnt<=bit_cnt;" s* e. V) K5 d7 J
when others => SID<='0';bit_cnt<=0;
& P: q+ Q4 f- o* H4 g% Y8 ~# q8 v end case;# w: d% _( U. C3 R
end if;2 ~3 N4 S: Y: {( U/ H
end if;1 X$ r! H4 F! m Z; d( B# g3 i
end process;- H6 L! `; {- a1 s! r
+ i( j7 p2 }! ?end rtl;+ W- \" s+ x, b. A. t v6 `$ `4 d" l
& @- r" i+ l& M/ q/ x8 j3 S
--str2vector函数
& Y7 A/ X( A7 d" dlibrary ieee;
% Q8 }: E- k. j w9 y5 Euse ieee.std_logic_1164.all;1 C4 j) C) g8 a. ?2 W
package lcdchar is% k0 b( V* O5 n g2 q* Y0 t
function char2vector (char:in character)
# K6 h4 Q. H) y3 D7 p9 U return std_logic_vector;( V0 J* t5 G) \$ C
function str2vector (str:in string;i:in integer)
' g3 c( g5 {: h0 Z return std_logic_vector;
+ t! h9 P7 u5 S) Hend lcdchar;$ m& w/ T. M+ \1 Y8 w
package body lcdchar is }( ?" H" p; _
function char2vector (char:in character)
. v" N k% s9 d" q return std_logic_vector is
; k: U% w8 q# W& P" l4 j! ` z begin
1 S& q% w# T# r9 g9 L! T case char is
* R/ `7 z" I& E, w$ V when ' ' => return x"20";# j4 c9 d4 @, B7 M# I& s. ]" a( s
when '!' => return x"21";
- l9 B9 l. Q$ e3 ~" K when '"' => return x"22";7 A1 W1 i( _: _+ m- \) H- E
when '#' => return x"23";
2 X& L$ [$ P; q3 | when '$' => return x"24";$ [4 E. ?8 F( V: t
when '%' => return x"25";) i2 T9 H- j2 E7 X [+ H* r) J0 n' x
when '&' => return x"26";0 _ T: {1 [- _: W- l& Z
when ''' => return x"27";( g9 {# h, @/ Y7 `9 ~8 i) q
when '(' => return x"28";
, U# l! P- Q5 D; i, t; V9 Y when ')' => return x"29";
$ [# f& b# O; R7 U7 n when '*' => return x"2a";5 c, z4 b' y, n# a4 h
when '+' => return x"2b";
: j \( W( L# V1 v when ',' => return x"2c";: M. ]# j X$ z' F3 C! P
when '-' => return x"2d";1 b8 u7 D! m/ B+ h' E# v: o. Q
when '.' => return x"2e";
7 `$ b: f0 D( T. s" K when '/' => return x"2f";# b% `- |5 X& x( Q, w
when '0' => return x"30";
3 g) G% F1 e( A) Z when '1' => return x"31";# v G1 ?# `# c* h
when '2' => return x"32";
& V! F h( A8 s0 b4 Z, G when '3' => return x"33";; a) N. a; A+ s9 F7 s* g, I
when '4' => return x"34";
% E7 B5 l+ F5 d: z- D4 u when '5' => return x"35";0 F3 X8 Y t9 K' }) c# p6 U0 d ]
when '6' => return x"36";
1 ^( f3 |$ _( |3 |5 T when '7' => return x"37";% }; q: |8 B& b- ^ Y5 \) q
when '8' => return x"38";1 ?. _" C1 L6 s+ @$ @. T
when '9' => return x"39";, V' w! q# \! z0 @5 O! L8 Y, K L8 A
when ':' => return x"3a";
" ]9 h( R. Y8 A o V when ';' => return x"3b";
' A* A8 l5 t6 w when '<' => return x"3c";
$ c9 f7 i/ l5 \% r ?2 ` when '=' => return x"3d";2 O! C/ T7 ~- \; _6 y+ D; ], M
when '>' => return x"3e";
/ O; d9 U2 {. v9 I V; G+ T; Q when '?' => return x"3f";6 B) l9 i6 u* j6 n" L3 ^6 B' }
when '@' => return x"40";' h5 V4 F% Y. M# Q4 P
when 'A' => return x"41";
2 u. A5 N9 h2 k when 'B' => return x"42";1 _( n# [5 ~+ h( _3 I
when 'C' => return x"43";$ {" `; H; `4 n3 v' d" |
when 'D' => return x"44";" V: \9 \* ?$ k& k z+ [; G, O8 Q
when 'E' => return x"45";
' Q+ n' o1 \5 Q when 'F' => return x"46";5 ], R: @& Y) k) |* W# N' b7 T
when 'G' => return x"47";; e' F& d9 |( B
when 'H' => return x"48";- s8 l9 m! f# `6 Y+ m
when 'I' => return x"49";
' ~6 t0 B- x: k$ O+ }+ ~. e when 'J' => return x"4a";$ z- o0 o: A' S. h
when 'K' => return x"4b";
n1 m* g2 n B6 k( e; Y6 {; M when 'L' => return x"4c";
& T( H1 x" @0 i when 'M' => return x"4d";5 v9 b& \: E) {. d; b( N3 Z
when 'N' => return x"4e";
3 m) ?% o, L2 u. m; ]5 C when 'O' => return x"4f";
) [7 t# j$ X; g9 |8 O% Z when 'P' => return x"50";6 R* I' ~6 u6 Y1 a7 G4 P
when 'Q' => return x"51";0 Y5 B$ p+ R3 G7 ^2 w2 p& Y" |, N! I
when 'R' => return x"52";
: C7 m$ i- U( B* f7 m4 o( V when 'S' => return x"53";: L1 L% k+ z" v( J
when 'T' => return x"54";! F8 W" Q" ?/ X+ ?- B8 W! g
when 'U' => return x"55";) }3 K/ `- J, N2 s9 j
when 'V' => return x"56";
# e: Y( T, w9 S' b& A7 N+ S when 'W' => return x"57";
$ {/ p. h- R2 @8 `' {; y when 'X' => return x"58";; I% N `0 N! v! i# c
when 'Y' => return x"59";
+ B# }2 G/ _2 V, ?# Q1 r9 v% u when 'Z' => return x"5a";" \( b" p- L O6 ^+ l c, z' z
when '[' => return x"5b";
7 H0 j' Q; ]9 s3 _8 Y+ o" u when '\' => return x"5c";
* }0 b# {; Q2 ?9 j+ s( \- S$ \ when ']' => return x"5d";% |5 N4 F' |9 R5 N$ ]
when '^' => return x"5e";
- t/ M! J! _# y# J0 W when '_' => return x"5f";; s2 Y+ W% _ ^
when '`' => return x"60";" g, t8 Y6 s' u
when 'a' => return x"61";
. o( g' `( [6 y: ^5 _ when 'b' => return x"62";3 S% f ?7 ~" i9 E/ j0 A
when 'c' => return x"63"; F3 x/ t7 l. K
when 'd' => return x"64";
# u% b2 r2 K/ J1 X2 R) L when 'e' => return x"65";
! L' x, [$ E+ V% Y2 ~# G: m9 T: ? when 'f' => return x"66";* g" j1 u8 ^! Z' Z. h! y) `
when 'g' => return x"67";
; ]& D1 M6 u" J0 x) |- u# x when 'h' => return x"68";4 C5 v3 E: x1 h7 J8 G
when 'i' => return x"69";% _( S1 |% V4 D3 |+ E/ O9 t
when 'j' => return x"6a";
: ~3 p7 c4 s" C; `, `+ [5 o when 'k' => return x"6b";5 \8 p- C T' z9 y4 V( s/ H
when 'l' => return x"6c";
; x3 Q$ ^9 }6 o- z- } when 'm' => return x"6d";9 `# w( d ^0 R% R0 T; @
when 'n' => return x"6e";3 S8 \! y2 H2 Q* J6 F
when 'o' => return x"6f";+ d+ q) C) x# V: p1 m' w2 l1 y
when 'p' => return x"70";
# K2 j! {4 t0 v4 z when 'q' => return x"71";
2 Z3 e8 W7 X& l+ M4 o when 'r' => return x"72";! V( c$ I" t- O. T& F7 F* `" \
when 's' => return x"73";0 `7 p7 R& J" N% c, \" n7 [2 A* w+ }0 f
when 't' => return x"74";
5 W# r s2 @4 ]- C8 a when 'u' => return x"75";
1 y( Q# H# o/ r* v, L' g when 'v' => return x"76";7 |0 L6 b0 ] J+ `8 _9 M; X" F
when 'w' => return x"77";/ z3 Q" b4 ?+ L3 E) Z
when 'x' => return x"78";
5 k" m' b( ^: r; ~% |& e when 'y' => return x"79";
7 E0 K7 }9 P/ \" f8 V2 I3 Z4 K when 'z' => return x"7a";/ N" A8 B, Q; ~, {/ m
when '{' => return x"7b";# J' u- d }4 b, T
when '|' => return x"7c";: o7 P% Y/ S% B% a
when '}' => return x"7d";
3 o* Q. k- Y# ^7 O8 {/ ]- o when '~' => return x"7e";
1 ~# H: q. [4 Q# w% f when others =>null;3 O. X+ E2 V: L1 b5 }
end case;
# O# q6 M/ e$ m% k; p" ~ end function char2vector;' D6 J2 }) L/ }$ V" `; q
- Y3 R1 I( y+ q1 T' j& R( l function str2vector (str:in string;i:in integer)
$ X5 Q" m7 Y5 k+ u2 X return std_logic_vector is
- q7 ~7 w' z) r. o. t begin0 M% ]$ q4 s- k- k9 k( X! I8 }$ Z5 d
return char2vector(str(i));
* a( O/ j' Z. P( J end function str2vector;0 n6 f$ K" j. ]9 X
end package body;
9 I) u. d& W l U: z1 F/ @
, Z' o# T. S; }2 K( k# ]: H! J; M: Q--代码已验证过，相当好用 |
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发表于 2019-4-28 10:58
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