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原程序如下:
5 u: i" a2 X2 ^ ?. N6 k& slibrary ieee ;
$ I" \- H w' R9 H* b8 r& v1 guse ieee.std_logic_1164.all ; x1 W f2 ~( Z$ p
use ieee.std_logic_arith.all ;
" y0 a( `0 V( V' Z2 duse work.butter_lib.all ;! p" a' F. f% L; q
use ieee.std_logic_unsigned.all ;
: [8 K# o" o X* Huse std.textio.all;: R8 V) t% P9 G1 Y' |; _
4 z# f# z3 ~& t- i# y: U# @5 n. \entity synth_test is' h. |( U' ?% t) t4 _7 t% Z
end synth_test ;
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# |, k- d4 x s# g6 jarchitecture rtl of synth_test is
- i# u: n5 b6 t: f% `component synth_main
' j% s6 e8 A/ V' D6 a8 |port(. Z7 u8 k& H |$ V4 \3 e, X Q
data_io : in std_logic_vector(31 downto 0);& m. _+ E' ~* M! A* x; O# ]
final_op : out std_logic_vector(31 downto 0) ;" X* l, R2 I/ p! r' ?8 x) f( E
clock_main,clock,enbl,reset,init : in std_logic) h& `. W% Z9 _# P l
);
* E: S" b0 S4 N: x* A8 vend component;
, W$ s4 e2 U+ b8 B' c0 F# usignal data_io : std_logic_vector(31 downto 0);. h& g" \# {! Z) D
signal final_op : std_logic_vector(31 downto 0) ;
6 b8 N3 o4 h2 C5 P6 x$ Y, x/ o Fsignal clock_main,clock,enbl,reset,init :std_logic;
+ M; L4 e e8 E7 Y. Q h; M) g0 f3 n+ h) S7 x) |5 R1 F
begin6 G7 W& ]! p) D; w
dut:synth_main port map(data_io=>data_io,final_op=>final_op,clock_main=>clock_main,clock=>clock,enbl=>enbl,reset=>reset,init=>init);% t2 p }! s7 ^% U" V" h3 h g
+ Z5 c# C- ^' d2 Bprocess0 Y# O% ^$ X C* x+ z; o
variable i : integer := 0 ;1 _# v A$ U5 k d
begin
& |0 `% t( r$ a" Zfor i in 1 to 1000 loop & L; `6 k( M: y3 R- T z1 S
clock <= '1' ;+ ~1 e; A) B5 q& y& K
wait for 5 ns ;
$ W4 {, G# Q T9 f8 y+ ~: O- ^1 u/ Gclock <= '0' ;: T) K' Q( E2 [" y" O( A
wait for 5 ns ;
6 W+ ~/ Z9 J$ ^! e6 {- ]! fend loop ;
) N# J: j$ |; M$ k y* D; ~end process ;
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process
/ T! k. J0 r1 h8 h, Qvariable j : integer := 0 ;
) F. p8 z( M! }) fbegin
9 S1 b" F& b. |1 Q9 g# g; s+ Kfor j in 1 to 1000 loop
4 B( c3 K7 k' N' Vclock_main <= '1' ;& }# b8 w8 o7 y- q
wait for 200 ns ;$ G' O5 t# P/ u0 s3 d) a$ Y
clock_main <= '0' ;
/ W9 _ }6 O8 \wait for 200 ns ;
. m6 r6 v6 g/ G: O% c7 C$ bend loop ;
" N# M% b" ^6 ?% f1 w# _8 F3 Send process ;; P: R/ D' j1 @$ }% g/ ~. v" b
# a% L" K3 a, p$ d
process6 C _* T5 Y8 F7 k
file vector_file : text open read_mode is "C:\modeltech_6.5g\examples\rom_ram.in" ;* X& b. {8 E5 y1 P
--file vector_file : text IS IN "C:\modeltech_6.5g\examples\rom_ram.dat" ;
: G+ t l7 D9 \* j- C0 Y/ G4 U6 ovariable l , l2 : line ;' h6 w$ C+ I/ M- [9 l. U' V
variable q : integer := 31 ;' m0 z# S4 ~1 \+ f1 G6 O
variable count : integer ;. Q6 s( Z) U \& s7 n
--variable t_a , t_b : std_logic_vector (31 downto 0) ; 8 B2 X; A* D2 j) Y/ V
variable t_a , t_b : std_logic_vector (31 downto 0) ;
: }' B+ {2 t* tvariable space : character ;; ]: l1 s: ?" q/ j! @4 @
begin
. S, b- [3 s1 _% H7 d. q( j- [* U; G" a0 X9 s5 \1 ]" O
while not endfile(vector_file) loop4 j( i7 ^- W) l [
--for count in 1 to 16 loop8 f0 e9 Y8 ?1 i
q := 31 ;9 f: |0 h* V M* r+ l- A) M& _
readline(vector_file , l2) ;6 J2 y. C. B8 ?* z% W, z8 x
* R& s; _1 c! l" tfor p in 0 to 31 loop -- data from RAM
( j# q$ w( g7 U' u9 o# yread(l2 , t_b(q)) ;
9 a: u& u4 H% W) Jq := q - 1 ;! `# c3 x/ l R* h! k( `
end loop ;6 _2 _: x5 {; u( V" q4 A, s
q := 31 ;0 \' Q1 h6 }2 X2 u% c
data_io <= t_b(31 downto 0) ;7 y3 U6 y3 i+ k8 N1 [7 u+ R! E
1 _3 ^+ W' a/ d0 i& fwait for 400 ns ;
4 f. M: ^1 K) X3 r! _end loop ;6 n! S1 _9 |- s; A/ E
wait for 8 ms ;% \$ f- L6 X' B7 j2 N4 m5 _: Q
--wait for 650 ns ;$ W7 R& M6 k$ M) C3 E
end process;: R+ _! d( u2 B2 d* Y2 l0 V
+ [. o3 I0 q$ P3 y. k- R
-- process to reset
2 O" Z* ^/ L" [2 q* Fprocess
" T9 _& q' n D1 N9 y% Wbegin
$ r* \/ ^/ E$ p: v/ Zreset <= '1' ;7 f/ n# [' M3 m4 ?7 a; _9 k
enbl <= '1' ;1 ^, t: T. B! p3 Y A' H! N% A
wait for 10 ns ;
; J' a& V( l5 g5 r; G7 A1 W' xreset <= '0' ;/ B' g# l9 W. M' G* L
wait ;
1 f9 e! } F6 x* A/ n( ]8 |end process ;
+ F; j" g3 ]: q% K! m* C3 [8 K) q
, }0 N- r% ?% p4 ?2 y1 B, Sprocess
7 k/ {' ?& R2 kbegin% _1 P) X ?4 g9 A) z
init <= '1' ;
7 b7 `7 I* s, }! j X& {0 x4 rwait for 15 ns ;
( c' m! T `7 X1 H: m( ~( q9 `init <= '0' ;0 s0 D! v$ U8 T8 K+ P8 k5 i
wait ;3 q6 ?% y9 B* r+ z8 S& Q% C4 W
end process ;5 _9 X! r$ `) y: l, s& @# b
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end rtl ;
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用modelsim仿真提示如下错误:No feasible entries for subprogram "read".
) U2 |0 O: p& p* C如果我屏蔽read一行,则程序编程可以通过,我刚学这个,还望高手指点。 |
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