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#include <msp430.h>2 ]5 o7 t( s' a! i" v
char readdata=0;. R; G+ H1 ^& y. T# S
char busy_data=0;7 f2 C. O3 Z# \5 T" V9 l
void write_byte(char data_byte);7 c6 c- ~2 S4 \. h
void send_command(char address1,char address2, char address3,char data);// command and address and data
$ R% U6 e6 c; \/ c; G" wchar recive_data(char read_address1, char read_address2,char read_address3);, Y) a" [4 S- d$ C
void delay();' A& Y' ?; B& A1 C9 {" O5 P
void erase(char command,char erase_address1,char erase_address2,char erase_address3);9 u! B; G4 O( C3 c0 G2 I3 W
void read_busy(void);
- F5 J% ?0 c# Q6 }1 w6 Hint main( void )( Z6 o( X3 b4 t
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// Stop watchdog timer to prevent time out reset% b2 C8 t4 L5 ^
# X8 k, I$ ` W! Q0 t
WDTCTL = WDTPW + WDTHOLD; 0 K% h) i J( b( M, D+ `1 r( e! V
P2DIR|=BIT5+BIT4+BIT0; //flsah sck hold cs out& `3 h0 d5 Z. ^ J1 M% ~
P4DIR|=BIT2+BIT3; //flash wp si output
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/ w" {; Y; B9 J$ J" D0 }% V P4REN|=BIT1; // so pull up x& Q; Z) o; a$ ]- n
P4OUT|=BIT1; //flash so pullup selected p4.1
0 [0 g7 u, ^+ t/ V+ d P4OUT|=BIT2; //wp=15 X! \# V d! I
9 @* s7 J4 l6 }8 d
P6DIR=BIT4;; D$ A* P7 o/ W0 C
P6OUT=BIT4; //led
, D# L0 o8 f3 F P2OUT|=BIT0 ; //CS=1; * K) c5 X! a% F( z. ?* Y
P2OUT|=BIT5; //sck=1;% l, i$ N! G+ ?/ k+ ]# b( }0 U! s
//P2OUT|=BIT4; // hold =12 G* {+ E. ~+ ]0 u3 G4 }6 B, n4 `+ y0 T
_NOP();0 a4 r/ A. J' \0 Q# l8 w
_NOP();
4 _( n* }! ^4 B; G3 i; K P6OUT^=BIT4;1 ^7 h* A+ M7 j. l+ K6 V: G
erase(0x20,0x00,0x00,0x00); * U2 @* \, s! x' i% h7 u1 x9 G
read_busy();
e& j/ L* m% p6 O/ G send_command(0x00,0x01,0x01,0x00); //xie,mingling 0 X: |4 Q% e& Q' e& F
read_busy(); [5 ^7 i8 d Y3 M u3 G* Z$ U
readdata=recive_data(0x00,0x01,0x01); 6 Y) x. u0 O- V( q
while(1), X0 M. L1 U2 S1 f6 U* s( {7 Y
{
1 X+ |7 Q" E! ]# R# Z // send_command(0x00,0x00,0x00,0x0f); //xie,mingling
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// if(readdata==0x00)' x) Y9 Y3 n6 l0 H6 G
P6OUT^=BIT4;; z4 L& h6 Y* \+ Q7 E
delay();+ F( ]/ P5 l* Q2 n8 S- D g
// readdata=recive_data(0x00,0x01,0x01);
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void write_byte(char data_byte)
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char num=0; $ W' y9 M) k* t8 L9 q
for(num=0;num<=7;num++)
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if(data_byte&0x80)
: ^2 j/ w F9 \& [5 e8 A, m P4OUT|=BIT3 ; //si=1;
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P4OUT&=~BIT3; //si=0; ) D- C, @6 K: Y- d7 M' A# u! _8 i& {
P2OUT&=~BIT5; //sck=0;2 B' x: M, |2 g5 R6 L/ K$ \
_NOP();
8 Z& d! F" l$ ~ _NOP();8 @7 g0 Q/ f* Z; f G( t) [8 u4 F
_NOP();
/ {8 V9 L, K* H* u _NOP();4 Y0 h% b2 H6 Q8 [4 U
data_byte=data_byte<<1; //数据从高位传输
% f. h2 J" t+ `6 A/ ] P2OUT|=BIT5; //sck=1; , H. [3 r! a; l% R' P0 [5 T9 \" K
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void send_command(char address1, char address2 ,char address3 ,char data)+ Z ^7 r a' i) _: q2 t8 u
{
) `8 U3 A, Y, T; w/ F: ]) O P2OUT|=BIT0 ; //CS=1;
, V9 K/ s% {* U/ O* i" ?* u0 z& [ P2OUT|=BIT5; //sck=1;
. `% c8 L. w# G; T5 U, l5 y _NOP();- e& e1 b2 G7 h( ~( J: W
P2OUT&=~BIT0 ; //CS=0;4 u" S/ H' o9 R z* ]0 z) l; {7 J
write_byte(0x06); // write command& H, p( L! q- f. p5 W
write_byte(address1);* b7 g5 m* R, f8 k+ {8 I8 s2 |, I
write_byte(address2);
. B2 J4 T+ s9 L: Z write_byte(address3);
7 j1 K- u9 Z- P! v3 a write_byte(data); {' p9 N5 z; E6 G6 l; ?
P2OUT|=BIT0 ; //CS=1;$ U7 x3 F& b6 y! E0 |2 h& J; o8 {
_NOP();: s: Z9 y- l+ z9 u8 a3 y
_NOP();. V: p# a1 }0 d& T6 |) E
_NOP();$ f0 J0 Q1 l' p, e
}
# }" w- A1 o) N: C
/ R6 N8 }, v' h, L8 I2 schar recive_data(char read_address1,char read_address2, char read_address3)
: x' ]& n4 y% q8 q{
+ B' F8 N$ B7 D W/ K0 l( l char read_data=0;
, ?/ @* B5 A( ?; Y7 b char num=0;
1 L ^2 ]+ R2 C5 S
2 y! Z, K& C0 _$ y9 s- }. d P2OUT|=BIT0 ; //CS=1; 6 ?. @, j* |" @4 m9 M5 n
P2OUT|=BIT5; //sck=1;
) ^( N- I9 e6 |. f/ l: k _NOP();! E( ?* Y* G8 C) M
P2OUT&=~BIT0 ; //CS=0; + t$ u3 V" V8 B3 K
write_byte(0x03);8 H- [5 i# a9 l) h% j
write_byte(read_address1); - X) ?: m! S, Q2 j
write_byte(read_address2); : `8 V1 J) N: B) V
write_byte(read_address3); % `* J* S8 O/ X8 Y3 I5 y* E7 ]7 Q
% w/ A1 I% q! L y for(num=0;num<8;num++)
0 y. u' S5 s0 s: b) |( y) X# J6 K0 m {
% K W: I+ P, l5 I P2OUT|=BIT5; //sck=1; 9 L4 }/ N1 d$ [ Z' }( e2 }
read_data<<=1;2 J7 D& G; F0 J5 g$ S$ ]
_NOP();9 A" C$ X9 f B4 ^ K$ ~4 c
_NOP();
! u' V$ ^) q' ]& X _NOP();
W* K3 Q5 ?9 r; y0 N _NOP();
7 y/ r7 h, }/ k" p+ ^ P2OUT&=~BIT5; //sck=0;
6 \4 D: v& w [& M if(P4IN&0x02); c* c) w7 @' K! ?; \
read_data|=0x01;% K3 c0 C% T+ H) |* ^- D
else. E' x" D5 K1 `5 Y6 x
read_data&=0xfe;
; }8 R J- V [+ n _NOP();- [0 w0 V0 J2 Z ~7 L B
_NOP();9 e6 X' m, H0 m( n
} 3 }. \5 r { k0 e% G) E
P2OUT|=BIT0 ; //CS=1;
7 Q9 c% w+ C1 G W _NOP();; E4 W+ g, n0 W: R+ [
_NOP();
! q! h7 }* V; J) v8 x5 g _NOP();
6 j0 w4 i7 ^* x+ ]) T) b) e return read_data;
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void erase(char command,char erase_address1,char erase_address2,char erase_address3)
. B8 X( T$ w" B3 }0 Z' q4 {{5 S s0 R4 c$ U7 ?+ W& e
P2OUT|=BIT0 ; //CS=1;
$ B8 B4 K( G N0 h; x" U0 O1 j5 D P2OUT|=BIT5; //sck=1;# p" ?% S6 R+ M9 k2 P
_NOP();
( |" S# o' Q, O( Y$ X8 }3 M P2OUT&=~BIT0 ; //CS=0;
' \0 O3 ]: {) F# h0 D2 R o- X write_byte(0x06);
4 Z5 J' Z: X2 O& }& s write_byte(command); $ a4 W4 P5 E$ v0 |7 s' ~$ w
write_byte(erase_address1);6 N3 B9 v0 a- ^" k2 T. S
write_byte(erase_address2);5 h% x3 _6 |8 Q% n$ j
write_byte(erase_address3);
8 Z$ b& k. D$ [. H P2OUT|=BIT0 ; //CS=1;
( m0 A' L A0 {+ v# M6 c _NOP();5 G4 W2 D$ K6 p7 T
_NOP();
* q$ E/ O" b6 A' g _NOP();
" u' d' m, R K( c4 h. {6 O- C}
. o7 Y7 J. B4 svoid delay()
+ B" c% O* j1 a' C1 X3 \{5 D- o1 z* z8 _/ i1 M" x
unsigned int i=0;9 J% [6 R: A. A) |2 a* K
unsigned int j=0;
/ R$ J9 e1 [3 {8 @# J7 j! Y- m for(i=0;i<=500;i++)( V# T0 S! g8 o# A9 s
for(j=0;j<=250;j++)
* q6 M/ [! L' U3 J) Y ;
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void read_busy()
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char read_data=0;
- {1 T; o2 a. q+ N char num=0;* e) C. Y s) {# O6 ] g
P2OUT|=BIT0 ; //CS=1;
: R0 n1 [# @, W( H/ O2 U P2OUT|=BIT5; //sck=1;; `' S7 m; `4 X: c3 X1 c
_NOP();! W3 g6 J' j4 |' b2 _. {, M1 F
P2OUT&=~BIT0 ; //CS=0;: p; l# w% a0 Z
write_byte(0x05); // read the SR1 8 F6 N U/ n( b0 r' N
do{
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( C" G5 p# I, {' r; |" }* s; X6 ^ for(num=0;num<8;num++)
5 {( u8 f+ ]- S5 o, [6 A: \0 q {# e u2 s. J* ~% p) O7 U% t
P2OUT|=BIT5; //sck=1; 9 s& G) f: d0 F; g
_NOP(); ! G) F1 l) @0 l' G- r
_NOP();+ s y2 ~' s- P
_NOP();
9 W) e) l* w5 p: x9 T _NOP(); - h+ b6 {9 G0 W) U$ k
P2OUT&=~BIT5; //sck=0;
! f8 |2 B& d# J, K# @ if(P4IN&0x02)
" e' }* X- E7 v read_data|=0x01;- E) w' T8 P" s/ z- y, b1 G
else3 e% Y* t3 R, }& _ K
read_data&=0xfe; % F9 Q; [, o" T- r
read_data<<=1;. W& j: ^$ { u! N
} ! R. ~) o, ]/ b! _1 v+ O- m
_NOP();
" u1 h X3 I" K2 Y# ]: v _NOP();
3 u9 Q {4 u1 E& n _NOP();
' C7 g. X" N, ^9 L7 E+ P busy_data=read_data; : ?+ |; w4 Z$ W1 Z0 ~3 Y
}- I0 |. {! _! o! k- O" X/ y4 z, @" ]
while((busy_data&0x03)!=0x02);
& e6 U. r0 h) M8 \8 @ P2OUT|=BIT0 ; //CS=1;/ ~9 N$ K1 k& Y# M8 `
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' V4 `3 R3 i6 u' ~' |}
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, t- F$ ?8 L6 t9 D! m: g用的单片机是msp430f5438A,模拟spi实现对flash程序的读写,现在读出的数据始终是FF,即应该没有写进数据,那位大神开源指点一二!8 {0 W7 r* R/ b7 n
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