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2019-11-20 15:00 |
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F$ W; g" B- a* H1 S7 m- |6 ~9 C/ elibrary ieee;- i& e6 ~8 w/ t$ n1 F6 N T9 D* X
use IEEE.std_logic_1164.all;
- b3 Z/ s$ K* A. d, ?' R& |! ^0 A0 euse IEEE.std_logic_unsigned.all;
- F, s$ z; {9 |use work.lcdchar.all;
2 v# ?3 y5 g+ E+ r; C4 Q8 f9 ^$ h8 I( f0 N" A/ q
entity display12864 is --LCD12864 display
' e$ \8 C: C+ |generic( fclk : integer :=50000000);
* U- M! ]/ m5 F4 q3 H7 k, L port(
+ k g8 Z0 v4 r/ X/ k( s7 q n_rst : in std_logic;8 U% d; L- W0 ^: U7 p7 O$ i( G2 }, C; s3 X
clk_in : in std_logic; I; X( }, \: [+ k
en : in std_logic;
- ]/ d, K9 j# Z8 T7 {& |; i! j SID : out std_logic; i( E% s' R& H1 J# u7 h
SCLK : out std_logic
( }8 v3 [& U! }/ d- D7 x );
; H* ^ _9 i4 t, mend display12864;
0 m/ @4 F3 A- l. R( J
4 X+ r9 Z \/ ~ g2 I2 karchitecture rtl of display12864 is
B. P5 j# t" T% c# C+ @1 `$ I. Q9 ~4 M$ C9 V0 N& m
constant div_num : integer :=fclk/500000;
) V: r/ B8 n4 q l' o3 v2 H* S
2 z4 x0 q" j/ k. J/ S- @ [--attention : '\' and '"' can't be displayed.* b6 L. i: k% B
constant line1_str : string:=" test1 ";
% y) t* y8 `. m- q4 K: Kconstant line2_str : string:=" 2 ";
7 ~8 g+ x+ V9 Aconstant line3_str : string:=" 3 ";
# K9 {. Z$ l$ C9 N2 y4 f9 v) @- H; Rconstant line4_str : string:=" 4 ";
6 F7 O: Z$ h1 S+ j3 U: X
. p5 K: X) H Esignal clk_500KHz : std_logic;4 }4 J$ i, P9 u0 O
signal LCD_cnt : integer range 0 to 71;: L' s0 P8 @. g9 k+ c
signal LCD_Data : std_logic_vector(7 downto 0);
' x4 v+ S, V& o2 `+ A3 j4 zsignal rs,LCD_cnt_en: std_logic;; B2 E* c, y8 W6 l
3 V9 z6 Z7 ]% j3 r7 e& ]signal clr : std_logic;
5 O, l" I3 A5 e5 E6 D! u% esignal bit_cnt : integer range 0 to 25;
! [2 c: w0 b! f' ]signal delay_over : std_logic;
7 J2 q* j8 m# ?2 R& h+ S ^constant delay_10ms : integer := 500000/100;--delay 10 ms
x. A) y/ T$ g, \( Cconstant delay_1ms : integer := 500000/1000;--delay 1 ms
8 `0 [0 L" j# u. _7 R% T- {begin
& A- ?9 x8 @7 q2 ^+ M0 U" L5 e
& r3 p! ^7 X+ r! w--frequency division* z$ C! K! H& r; O! ]: x& x
process(clk_in,n_rst) . Z2 h5 Y# h& x. D2 f+ r0 ~
variable div_cnt : integer range 0 to div_num-1 ;
& X. x3 N& I. }! B' ]: U( ~ begin. z- n; _! B+ B) W- f6 H+ h# a
if(n_rst='0')then
7 B$ [8 b8 u2 [" @: V div_cnt:=0;
) P. ]4 _5 e% }/ X elsif(clk_in'event and clk_in='1') then- W! L' w! V: V% F8 }
if(en='1')then
2 ^6 ?* ]9 Y; @+ q- N% z" o$ h if(div_cnt>=div_num-1) then
/ f) }- H6 J( O) N div_cnt:=0;4 X( m# R& d9 H' Y0 Q
else
* l7 I# i! b' b/ O if (div_cnt < div_num/2) then / u+ p8 y7 E% {. t
clk_500KHz<='1';- l: b' a Y4 \# d8 m4 G
else
. N( G+ F+ ?, B! n( y8 b( _ clk_500KHz<='0';
4 ]" x9 c- ?! r+ m2 v4 h end if;
5 J2 x C F2 j# r% v" Z1 L2 |$ g( Y div_cnt:=div_cnt + 1;
4 ]2 q' k9 c: [& j# B end if;) E, N* l/ W- {/ ]6 X" J
end if;3 w! S. n3 K' G5 J, o. m
end if;
& e* u/ Z1 S" T% ~ end process;
: v% L) ^/ q9 L
1 T! |7 b: O. [$ H# V l process(clk_500KHz,n_rst)
; G. [' B4 r/ b9 a7 B begin
2 |. n" x2 J1 R% s, e# M) R8 A0 L if(n_rst='0')then. U& i: g& I2 w" [( |4 N9 h
LCD_cnt<=0;' ]$ w, l5 c" O$ ^1 g
rs<='0';: L! x+ E! I2 _, c. {: [
LCD_Data<=x"00";
) v1 ` F4 g+ w, i5 |2 q2 ]1 C elsif(clk_500KHz'event and clk_500KHz='1')then7 X0 W% X: ?( h" J1 L* ~1 p* @
if(en='1')then
3 p6 M1 P! A- D7 T# ^ if(LCD_cnt>=71)then
8 @% U5 a# M9 Q0 n3 R5 B1 {; U8 K LCD_cnt<=4;+ u0 p- w7 E6 [* h7 z. W, t/ T& r: \: _6 U
elsif(delay_over='1')then
& S1 `% {5 g- d# a LCD_cnt<=LCD_cnt+1;
n+ k1 C+ J0 u+ L- e else
2 d$ I7 X9 u% Q+ k LCD_cnt<=LCD_cnt;) q8 k* p4 Q# x
end if;
) H' G1 w8 l4 p. ~2 ?; [/ h case LCD_cnt is
+ ~' |# e: ~% n( G when 0 => rs<='0';LCD_Data<=x"30";
7 k% y7 A& u& y! l( u. \ when 1 => rs<='0';LCD_Data<=x"01";: h$ a$ s1 h7 e' [8 X: Y3 O
when 2 => rs<='0';LCD_Data<=x"06";
5 O0 Q" b+ i( d$ e5 E7 [2 {- d" u when 3 => rs<='0';LCD_Data<=x"0c";
7 Q' g6 a' o. g0 }' v ) c' m! }- M( p5 b% G* r( t8 J
when 4 => rs<='0';LCD_Data<=x"80"; --first line3 m) e/ k7 E5 A; H3 \5 R. g9 m
when 5 => rs<='1';LCD_Data<=str2vector(line1_str,1);! R2 `, i$ f% E) n" I! d! p
when 6 => rs<='1';LCD_Data<=str2vector(line1_str,2);5 L5 o" e6 [ `. z" k: _
when 7 => rs<='1';LCD_Data<=str2vector(line1_str,3);
1 Z. U8 `: T# C9 o1 l% A when 8 => rs<='1';LCD_Data<=str2vector(line1_str,4);2 d( [$ F7 v4 a1 p& ]/ `
when 9 => rs<='1';LCD_Data<=str2vector(line1_str,5);& l% N/ t4 g1 o1 Y' j2 ?
when 10 => rs<='1';LCD_Data<=str2vector(line1_str,6);5 o" k: I/ T* N1 B M$ h
when 11 => rs<='1';LCD_Data<=str2vector(line1_str,7);
* c# G$ O% a0 d2 y* T8 Y when 12 => rs<='1';LCD_Data<=str2vector(line1_str,8);+ f/ w C' P: ?1 [2 ~4 Y" X
when 13 => rs<='1';LCD_Data<=str2vector(line1_str,9);
# Y1 S7 ^" S7 N when 14 => rs<='1';LCD_Data<=str2vector(line1_str,10);/ Q x- k- ]! E2 P( Q
when 15 => rs<='1';LCD_Data<=str2vector(line1_str,11);
2 l" {: P( e# Y+ e& q5 P/ F, D when 16 => rs<='1';LCD_Data<=str2vector(line1_str,12);& o9 Z$ Q+ I) N* X
when 17 => rs<='1';LCD_Data<=str2vector(line1_str,13);+ h4 Y9 n; t, r2 a0 J" _
when 18 => rs<='1';LCD_Data<=str2vector(line1_str,14);0 Y1 v1 S" i6 }
when 19 => rs<='1';LCD_Data<=str2vector(line1_str,15);
4 D* y( J. |3 W9 X: R, { when 20 => rs<='1';LCD_Data<=str2vector(line1_str,16);& c9 ?: z3 a1 D
" O5 s) Z5 ^/ ` [% q# e
when 21 => rs<='0';LCD_Data<=(x"90"); --second line" k9 E; ~" | c% d
when 22 => rs<='1';LCD_Data<=str2vector(line2_str,1);
( v. f @6 K7 s3 ?& a. Z when 23 => rs<='1';LCD_Data<=str2vector(line2_str,2);0 y1 r& S3 _; U! p7 s0 ]
when 24 => rs<='1';LCD_Data<=str2vector(line2_str,3);+ `* E9 I1 N$ S" H, u K( {2 Y( f
when 25 => rs<='1';LCD_Data<=str2vector(line2_str,4);- z1 Z6 d, Y9 b) @% C: S, u$ U
when 26 => rs<='1';LCD_Data<=str2vector(line2_str,5);
+ q2 p- C' W% T6 `) J2 d when 27 => rs<='1';LCD_Data<=str2vector(line2_str,6);
4 Z( g' a( _+ U7 } `5 v1 m" q when 28 => rs<='1';LCD_Data<=str2vector(line2_str,7);
* X/ J; ?/ Z) I3 b when 29 => rs<='1';LCD_Data<=str2vector(line2_str,8);
* c: U+ s( m @& |9 f when 30 => rs<='1';LCD_Data<=str2vector(line2_str,9);3 |( n! \& t% \; i
when 31 => rs<='1';LCD_Data<=str2vector(line2_str,10);
, A- H' M. ]3 z: {6 F: P0 \ when 32 => rs<='1';LCD_Data<=str2vector(line2_str,11);# `. o. F1 ~6 N- s8 r
when 33 => rs<='1';LCD_Data<=str2vector(line2_str,12);2 a5 M; g5 z+ R; o
when 34 => rs<='1';LCD_Data<=str2vector(line2_str,13);2 a" y% U' Y2 c8 r3 G; p6 F0 d/ v* E
when 35 => rs<='1';LCD_Data<=str2vector(line2_str,14);
+ D0 p% c4 w; b# u when 36 => rs<='1';LCD_Data<=str2vector(line2_str,15); k. W& O1 _, F9 q: j7 V
when 37 => rs<='1';LCD_Data<=str2vector(line2_str,16);0 K7 P* v* h$ v- W
$ G- n5 C0 V: D) [, d when 38 => rs<='0';LCD_Data<=(x"88"); --third line
& ^6 z! k, q. E4 X when 39 => rs<='1';LCD_Data<=str2vector(line3_str,1);+ M3 Q$ T. O) S/ g/ w W3 U
when 40 => rs<='1';LCD_Data<=str2vector(line3_str,2);! M4 ~+ A3 T2 _3 K8 Y6 z
when 41 => rs<='1';LCD_Data<=str2vector(line3_str,3);
; J4 q1 R- Y+ b" ~0 g7 W' B when 42 => rs<='1';LCD_Data<=str2vector(line3_str,4);' @, q" A2 n6 \0 [3 x/ I
when 43 => rs<='1';LCD_Data<=str2vector(line3_str,5);2 w) \0 h4 q- M+ O+ k/ S& t
when 44 => rs<='1';LCD_Data<=str2vector(line3_str,6);3 _5 N, N& m3 h- r8 U8 S, Y
when 45 => rs<='1';LCD_Data<=str2vector(line3_str,7);; ]) @$ v9 z# c, x* U9 F
when 46 => rs<='1';LCD_Data<=str2vector(line3_str,8);
1 B7 U* W( x+ ? when 47 => rs<='1';LCD_Data<=str2vector(line3_str,9);, d+ }7 k; o" J8 b" e2 Z
when 48 => rs<='1';LCD_Data<=str2vector(line3_str,10);/ n4 T( u4 J0 f* B/ Z- g! K; K! P) W
when 49 => rs<='1';LCD_Data<=str2vector(line3_str,11);- V1 G$ T7 i4 L/ ]5 _
when 50 => rs<='1';LCD_Data<=str2vector(line3_str,12);% K1 h4 _% X, l- A. G l
when 51 => rs<='1';LCD_Data<=str2vector(line3_str,13);
0 y* n$ O0 {% n, f: { ^ when 52 => rs<='1';LCD_Data<=str2vector(line3_str,14);' u* Y% C" X2 ^! |
when 53 => rs<='1';LCD_Data<=str2vector(line3_str,15);" X9 G- y/ g8 Z- J s
when 54 => rs<='1';LCD_Data<=str2vector(line3_str,16);
/ o5 m* Z" t/ l. S* \ . a6 d) S, n( q! W! o
when 55 => rs<='0';LCD_Data<=(x"98"); --forth line i1 C# D% t+ n+ k. B
when 56 => rs<='1';LCD_Data<=str2vector(line4_str,1);7 m$ ~; a5 [. c B8 i
when 57 => rs<='1';LCD_Data<=str2vector(line4_str,2);
: Q; l, w% s$ l. }, o. c* Z when 58 => rs<='1';LCD_Data<=str2vector(line4_str,3);% K6 o: F6 u; V- [
when 59 => rs<='1';LCD_Data<=str2vector(line4_str,4);
b) X/ F7 Q7 u6 G: B# W+ Y when 60 => rs<='1';LCD_Data<=str2vector(line4_str,5);
) g4 n2 c H+ l- r' M% g when 61 => rs<='1';LCD_Data<=str2vector(line4_str,6);, I* |4 r4 k9 x8 p, r
when 62 => rs<='1';LCD_Data<=str2vector(line4_str,7);
, N0 y3 ^+ I( Y6 X5 d when 63 => rs<='1';LCD_Data<=str2vector(line4_str,8);* S: H" q( ?( n6 Z/ p7 V
when 64 => rs<='1';LCD_Data<=str2vector(line4_str,9);/ Z9 H9 S: B1 i w u) z3 ~" B5 R
when 65 => rs<='1';LCD_Data<=str2vector(line4_str,10);
9 y- z" Q$ Q4 q* P when 66 => rs<='1';LCD_Data<=str2vector(line4_str,11);
1 o; P4 t9 v" U" [1 y: i$ E1 E when 67 => rs<='1';LCD_Data<=str2vector(line4_str,12);5 W9 r# b# ?3 _* i4 ]) `1 n
when 68 => rs<='1';LCD_Data<=str2vector(line4_str,13);
" ~5 W$ R! K3 K2 m5 i6 p0 I when 69 => rs<='1';LCD_Data<=str2vector(line4_str,14);/ d' j( f4 p J! r/ e
when 70 => rs<='1';LCD_Data<=str2vector(line4_str,15);4 O2 T9 C! f1 X/ m
when 71 => rs<='1';LCD_Data<=str2vector(line4_str,16);7 O( S$ a4 k! |' t* {) Z
5 n. x4 p! Q. u5 e& J5 ^) ^+ X
when others => rs<='1';LCD_Data<=x"00";
) G0 [- P- M5 c4 w end case;
; x0 j' X" u( h end if;) H2 A+ d- K, L
end if;
4 G5 Q3 F/ m$ ~. c: t4 { end process;
. E" F8 D9 f+ o6 H3 n1 Z, U& b' z% t' \$ [
--delay 10 ms counter * N8 m) z! G/ A# t
process(clk_500KHz,n_rst) " u: l3 ^+ E k4 ^
variable cnt : integer range 0 to delay_10ms-1 ;
I( r/ z' A) E5 O( Z begin
$ Q+ A! D4 ?' k+ x* i9 }4 d1 c if(n_rst='0')then, \2 }: s, c5 O( [ P" y
cnt:=0;
8 f$ y4 ?! d6 m: ]8 V9 i) M delay_over<='0';2 R/ s B; J$ i) Q; p+ [
clr<='1';1 K) s! H B5 b: A5 Q+ T" D
elsif(clk_500KHz'event and clk_500KHz='1') then0 y) K0 a" D; L' o/ V" }8 y, w
if(LCD_cnt<=4)then5 K0 C1 D4 [0 W# Q- o- y5 R
if(cnt=delay_10ms-1)then! i2 Q5 F7 _# B3 q# b9 S
delay_over<='1';
+ x; r- L5 f9 N' N% @. b$ y5 T) o clr<='1';$ B. @; g7 f3 {! A9 ]. g# v0 [8 L* ~
cnt:=0;
' I& U0 z# _. ?( P; z! k- Q else
( j! G$ E7 o) ?& ]7 `; J) v delay_over<='0';, ^! H( f' V% a, l0 I( z3 Q
clr<='0';
! ?$ t* y( k; m if(bit_cnt=25)then
% X: |4 M( T b2 a& u0 [- B9 t/ e5 e cnt:=cnt+1;% {2 z2 W0 v6 k# t, j- Z! H/ d+ ^4 @
end if;
5 d9 u# e& z+ X- G end if;* h! c9 ~+ Y7 j; M. s
else' ?! P G0 ?. p( @; i
if(cnt=delay_1ms-1)then) b0 ` R2 D/ y- g
delay_over<='1';' b+ s; n* o* K, E
clr<='1';+ ^- ]' H- l2 i0 c @% F y: J
cnt:=0;
1 W' {6 `9 s, L4 A else
: r, _) v/ i0 E' C& U delay_over<='0';# R" n H0 `( m! O
clr<='0';
$ t# k* F) u" W- O if(bit_cnt=25)then8 O$ Z5 j0 D0 w
cnt:=cnt+1;+ Q p5 g o' U) X9 A( O C
end if;; v- t8 Z# t5 n" ?7 H7 v6 E
end if;
9 @) x& i$ \4 `$ P end if;
* ?, I9 Y" [% m end if;
4 q9 `6 P8 C. g# c end process;% d- l; l* ?1 u) J1 F
( e; e" x$ x ^) L3 Z
--output SCLK% C( R$ o0 U9 S. w
process(clk_in,n_rst)
) ?' }4 a9 c, ? e begin0 d2 L1 v( g9 C, H: M' t, P
if(n_rst='0')then
! ?! c9 M- h! r9 G( g. X" b SCLK<='0';
, R# @8 F7 i, P( L- e( w elsif(clk_in'event and clk_in='1') then
& L8 G) k* s) S9 S9 c+ M: b if(en='1')then8 N0 V. a9 U* ]8 Y5 l
if(bit_cnt>0 and bit_cnt<25)then9 s: T9 X% n1 y D. v1 T j
SCLK <= not clk_500KHz;" \. ?* p9 o3 L+ d. w8 k; b) J
else
# |% T% K) P, |( {2 J SCLK <= '0';
7 M: X! e/ l7 i4 z: r# W2 w6 r end if;0 C+ [+ n8 L. A; l$ Y" [+ n3 ^
end if;
) {3 F) B. V: Y end if;
3 I- b0 t; h: b4 H9 ^1 X end process;
F9 n g9 k$ D9 ]8 G
; W- H! g/ P) O$ p4 {; U6 T8 U--output SID1 h7 L1 U9 ]; k2 D
process(clk_500KHz,n_rst)6 p/ d6 ~3 l1 g0 ]" S; t
begin# ]5 Z6 o" o) s+ U( A) L
if(n_rst='0')then7 T/ J! X9 D) V4 x
SID<='0';
, w. X \6 I, D( \ bit_cnt<=0;
5 `& O0 r. U( L0 N) v9 _$ u. [ elsif(clk_500KHz'event and clk_500KHz='1')then3 g' X9 M* I8 ^2 n6 R! V
if(clr='1')then1 D2 e4 V* I) h( |! K5 k) B) a
SID<='0';
& F, K8 S2 E$ c- k3 N0 g bit_cnt<=0;
& T: m% q5 a' Q( u& h else
/ Q+ g* f" a7 I3 I, t) H' t case bit_cnt is. ^4 F+ r2 N2 K' T* s8 g+ m4 ?7 Q$ @% D
when 0 => SID<='1';bit_cnt<=bit_cnt+1;
- }6 t2 _# m$ Q; r9 H: C8 u. B. U when 1 => SID<='1';bit_cnt<=bit_cnt+1;7 D0 Z% R0 g. H5 n" x" l" c6 c
when 2 => SID<='1';bit_cnt<=bit_cnt+1;
, c3 u0 x" P" f when 3 => SID<='1';bit_cnt<=bit_cnt+1;
( C7 H0 [" p! S9 Y" l* w& G- n" \ when 4 => SID<='1';bit_cnt<=bit_cnt+1;
2 z) ]" |+ F% r) z) Y/ B5 k9 L when 5 => SID<='0';bit_cnt<=bit_cnt+1;
" z9 E% @5 Q ]) w9 k2 ^' T when 6 => SID<=rs ;bit_cnt<=bit_cnt+1;
+ F; s2 I# z2 G G6 j$ E1 t* ]( a when 7 => SID<='0';bit_cnt<=bit_cnt+1;9 ~& L. C9 E: R* m9 c
when 8 => SID<=LCD_Data(7);bit_cnt<=bit_cnt+1;5 F. {7 B! _5 `+ p! N' `1 q/ G
when 9 => SID<=LCD_Data(6);bit_cnt<=bit_cnt+1;
) I) l( ^+ k9 i, b/ \0 a0 A when 10 => SID<=LCD_Data(5);bit_cnt<=bit_cnt+1;
2 c# r6 z# P& ^' y& W4 V; M when 11 => SID<=LCD_Data(4);bit_cnt<=bit_cnt+1;. v) Z2 p2 `$ G; B
when 12 => SID<='0';bit_cnt<=bit_cnt+1;) ]( {* y( k' w8 C, ^3 Y
when 13 => SID<='0';bit_cnt<=bit_cnt+1;, a! C# Y; }) t0 E: h! a
when 14 => SID<='0';bit_cnt<=bit_cnt+1;
, ]! g! o: G. p7 H' w# Z* C when 15 => SID<='0';bit_cnt<=bit_cnt+1;8 o8 ]& ?$ l, ~
when 16 => SID<=LCD_Data(3);bit_cnt<=bit_cnt+1;
$ }7 G, h% c9 x2 W! t9 m when 17 => SID<=LCD_Data(2);bit_cnt<=bit_cnt+1;! g/ V. l. U9 O6 S A* V
when 18 => SID<=LCD_Data(1);bit_cnt<=bit_cnt+1;
( D7 u5 c$ D4 v" h+ X0 y9 B v' z: P when 19 => SID<=LCD_Data(0);bit_cnt<=bit_cnt+1;
: C8 s' ~( \8 G4 f1 l: f when 20 => SID<='0';bit_cnt<=bit_cnt+1;
e7 g3 n* ~" \ when 21 => SID<='0';bit_cnt<=bit_cnt+1;
7 I& l, T6 K% ^1 O, i- a when 22 => SID<='0';bit_cnt<=bit_cnt+1;
; Y. Y% K: ~7 l0 ]- _& v when 23 => SID<='0';bit_cnt<=bit_cnt+1;# @4 _7 h7 n3 c
when 24 => SID<='0';bit_cnt<=bit_cnt+1;! u v9 _# Y# k6 `
when 25 => SID<='0';bit_cnt<=bit_cnt;
- Q* W: q+ u6 C8 ?! K8 k: `# x. W when others => SID<='0';bit_cnt<=0; h: `3 P5 J) Z- P: Z
end case;: E1 f1 _0 b4 F" c
end if;
! Z% @4 `$ q. `5 x9 w5 a$ F# s0 Z end if;0 F8 Z4 H. Y( ~3 ~1 V
end process;3 m* z( A$ q- v
3 Q9 h1 S |/ T+ {end rtl;! M% T) u4 k/ j! V4 E
9 A5 {7 @$ t$ h/ @# M+ {
--str2vector函数' a, G. R6 U* X( F1 \0 V) Z
library ieee;
# S6 c# D6 \% y& [7 [* C5 Euse ieee.std_logic_1164.all;
. C2 t, n2 _4 N+ ~( {: E. R) Q% R1 Mpackage lcdchar is
/ F* u; S3 p+ C. S; B8 C6 T7 z4 t" s function char2vector (char:in character). s" m: Q' a4 L( {
return std_logic_vector;
% c$ L# {7 m2 c* u( {+ A function str2vector (str:in string;i:in integer)
. J: B5 w- j8 s, R& \ return std_logic_vector;" C9 X" C9 o/ r& R: }1 P
end lcdchar;
: V! V/ A5 A$ Q0 Z# npackage body lcdchar is
+ L7 n1 \ i9 N( A3 r function char2vector (char:in character)7 E% H; \7 ^8 ?* N+ b, q
return std_logic_vector is
+ ]/ Y) p& j5 \( b+ {, T begin+ \- F, ]% P1 u4 V: P
case char is, s2 p2 [. m$ i1 `8 A
when ' ' => return x"20";- A f2 w6 ]4 ~" Y' a; x& Y& Y: x
when '!' => return x"21";; `4 y- e9 d0 K# N J
when '"' => return x"22";
! A, I( Z. Z% H" r when '#' => return x"23";* u ]2 u) C. m p8 p( [
when '$' => return x"24";/ V4 M) t+ Q5 t& M, h4 i' U6 c
when '%' => return x"25";
t/ ~3 `$ Y# M) m when '&' => return x"26";9 R9 S; x$ m# s: q: _6 q
when ''' => return x"27";, `1 q* b5 J$ ?
when '(' => return x"28";
& |) N) h* j( ? when ')' => return x"29";% q* l# Q; Q3 O& G {! \- s" I# g
when '*' => return x"2a"; v( V' ?2 K& K2 W; v
when '+' => return x"2b";9 j0 z$ d- C$ P7 \
when ',' => return x"2c";
5 p+ X* |- @/ K) I: H when '-' => return x"2d";! `$ N1 u% T) ]( m$ |" N
when '.' => return x"2e";' w3 m3 N" t6 H# o' v
when '/' => return x"2f";( T) [4 |# [5 J6 d( R+ E$ N6 Y
when '0' => return x"30";
0 z/ E) Y' ?# G, V6 x# |0 f* b when '1' => return x"31";
6 ]; N* N2 n6 l! o8 g( Q when '2' => return x"32";# T) h) b+ N' H+ h
when '3' => return x"33";
3 V! s+ X4 G7 B/ x when '4' => return x"34";
0 K0 D# `1 X* k% p# G3 V: M when '5' => return x"35";4 e7 I6 u# i* f/ n( Q% ?( {9 M
when '6' => return x"36";3 D3 d$ I' P/ c# O4 H+ ~( j
when '7' => return x"37";
' e. p1 q' ^6 E/ d when '8' => return x"38";& f4 Z* p; l5 c, s
when '9' => return x"39";# k, ]* }4 b2 \$ n
when ':' => return x"3a";; a3 o% d2 D5 t* V
when ';' => return x"3b";: [3 e, j0 z2 M% w8 z0 s. @+ n
when '<' => return x"3c";
1 n2 J; {9 O1 W2 ?1 O when '=' => return x"3d";! t2 ~8 g# X, m/ F. F2 b
when '>' => return x"3e";- _: L- Q# U/ v* U. C
when '?' => return x"3f";( q2 e4 d+ @( s. B
when '@' => return x"40";- O+ C- ?& g Q/ b N
when 'A' => return x"41";) }9 z! f0 P5 \4 a' g' N1 z1 x
when 'B' => return x"42";; _) }% H. o) B
when 'C' => return x"43";8 [1 J- w, K1 A2 N1 G
when 'D' => return x"44";
9 J: J5 @8 R- U6 W when 'E' => return x"45";! d9 D5 O/ p) r" V8 e
when 'F' => return x"46";3 A0 I0 G3 H2 r( A+ @
when 'G' => return x"47";% n7 m% J4 ^! Z6 |$ M5 Y
when 'H' => return x"48";
+ U# x8 H" o+ d; d: [ when 'I' => return x"49";, D$ S. d" H. n& O/ o
when 'J' => return x"4a";
3 d6 W+ b. x) N! I: U2 ^ when 'K' => return x"4b";# ^" B: {( r7 N2 U/ `: r
when 'L' => return x"4c";
: ]9 _* K6 o! W7 l when 'M' => return x"4d";. M4 O, Z( t, L! B: Y. i% j, a8 C
when 'N' => return x"4e";
$ ^& F! P2 n2 f when 'O' => return x"4f";) h$ @' b0 ^' S# p, I) C9 u
when 'P' => return x"50";
9 J8 D- f# O/ c/ X. D! Z$ f when 'Q' => return x"51";+ ?' ^: L! m6 P/ J9 e
when 'R' => return x"52";1 s/ H5 ^/ _$ v: \
when 'S' => return x"53";" P' ^7 V* m( C
when 'T' => return x"54";
" z; }7 C3 r. O0 W' A0 h when 'U' => return x"55";2 I: R W6 V# n, @ w- i4 ^
when 'V' => return x"56";3 u8 r% [1 e9 g
when 'W' => return x"57";+ i5 T" ]6 q1 \& i8 B6 R
when 'X' => return x"58";
" D+ c% x& t, Y1 B Y% u8 Y when 'Y' => return x"59";9 B# k) d4 ?! t/ k2 K8 c
when 'Z' => return x"5a";
" s6 @/ ]' F7 @ when '[' => return x"5b";
! \# k1 A1 U: h5 m3 n when '\' => return x"5c";6 [% N5 D8 f, D5 ~0 E+ ~& d
when ']' => return x"5d";
! {( [9 b; D- W0 T& q+ q when '^' => return x"5e";# E) `1 Y% I( u. z9 ^
when '_' => return x"5f";
+ p& \$ b/ V$ D& a8 H8 ~5 k) k when '`' => return x"60"; h$ C9 q7 p2 ~+ ~ J. v# D+ ]9 Q
when 'a' => return x"61";' @, c( r0 a/ C, S! s! ?) B" l
when 'b' => return x"62";
% o& Q; E$ N8 W- @0 T4 b when 'c' => return x"63";& R9 r, p9 o, _! @$ \* d" [ b
when 'd' => return x"64";$ A2 n( W$ Y0 a) m3 w" W. `
when 'e' => return x"65";
5 F9 k8 F; k' }3 q# V& b# c, a( j; K when 'f' => return x"66";
; m6 l: d3 O7 C9 t# o' { when 'g' => return x"67";. q( E) g. a( v- x2 ~
when 'h' => return x"68";4 y" O5 M! |3 h( G
when 'i' => return x"69";
( I; H, W- d S } when 'j' => return x"6a";7 B2 ^, x8 u+ z3 ~
when 'k' => return x"6b";5 d& s- M/ q2 }! ]
when 'l' => return x"6c";
- e( v1 W& E" e9 X. Z# L& L when 'm' => return x"6d";
: h7 [6 S3 y" @+ } F9 A, V0 l when 'n' => return x"6e";% H# h! f3 g7 C) x/ t: Y6 l3 |! ?
when 'o' => return x"6f";
" Z) }- @9 y( L# T when 'p' => return x"70";5 T( g- I6 [6 m' t
when 'q' => return x"71";
6 y1 A& U4 T N" A9 B when 'r' => return x"72";
# w# @% l0 e) R2 H; s when 's' => return x"73";# g/ O7 g3 k0 N
when 't' => return x"74";0 N& C- d! B# E! ]$ I
when 'u' => return x"75";) a' [9 Y" \( y. e8 L& [
when 'v' => return x"76";
! _% {: R7 l' Y" W, }, Q when 'w' => return x"77";
: H5 C8 o5 S2 C/ D {7 P) u when 'x' => return x"78";8 C% A- m$ w0 f2 w' X( D' z
when 'y' => return x"79";, C6 S6 Y; d% B* V: m
when 'z' => return x"7a";
! S) |1 T- }5 f1 B when '{' => return x"7b";+ ~/ k: x3 }- D. t
when '|' => return x"7c";3 p$ t: G* N- R3 \ }2 l1 F
when '}' => return x"7d";$ @$ V. _$ `' S, p
when '~' => return x"7e";
% ]" n# A& b1 C when others =>null;) a5 w" L: w G. u) d! O
end case;
5 W# \' a- W- [# a. }/ a; e end function char2vector;
+ A$ t6 s' m: f0 t c/ U
/ |6 y6 C$ h, |* \3 e% q function str2vector (str:in string;i:in integer)
4 G3 P. o( ~4 [9 P7 u5 Q return std_logic_vector is
+ |; Q0 d( l+ E2 O begin
- S7 c- V: T2 b( _5 t; t. d4 c4 E return char2vector(str(i));8 ~" |- g. p V& x- _# i
end function str2vector;
8 I# J& l( n( y& gend package body;& ^+ g3 l5 Q8 ^4 b/ Y( A
2 l. T2 T' _) l
--代码已验证过，相当好用 |
! `/ Z6 g5 ^6 a$ V4 c2 Y) K |
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发表于 2019-4-28 10:58
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