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FLASH擦除程序:! |, G+ i' ^( W1 O
Uint16 ChipErase(void)8 g, s- S$ h+ \0 c( u0 F, _9 p) P
{
3 `0 v1 s7 d# @& Y. E- cUint16 Data;
$ X' a x2 o) i9 I' f6 a& aUint32 TimeOut,i;4 U" W F0 v, s+ z, O4 x
/***********以下过程需要严格遵守**************************/+ E2 _2 e& R6 o# Q5 L$ E7 E6 `
*(FlashStart + 0x5555) = 0xAAAA; //需要对FLASH的0x5555单元写0xAAAA
4 J; a! p/ _7 y! }' E1 h; v& E2 {' e*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x55552 p2 s0 }4 y4 h' Y! T
*(FlashStart + 0x5555) = 0x8080; //随后对FLASH的0x5555单元写0x8080;
/ j* L% S5 x# I$ b, [& I5 s# t*(FlashStart + 0x5555) = 0xAAAA; //乊后对FLASH的0x5555单元写0xAAAA
- g! w- n% y4 @, W*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555 ~* y0 ]( I9 w. k8 G7 M: s
*(FlashStart + 0x5555) = 0x1010; //需要对FLASH的0x5555单元写0x10104 X% z* k( Z2 p" |2 M
i = 0;
2 _2 A. w4 ~% O* RTimeOut = 0;3 ~$ Q% ]+ n! P! ]- w# w
while(i<5)
3 _+ d1 Z- s! g{3 _/ k6 [# R! W$ B
Data = *(FlashStart + 0x3FFFF);
|% \2 E5 ^( B1 @% Eif (Data == 0xFFFF)
9 r6 m6 F0 c6 o: s; J; yi++;
9 ^! J# ]) E1 z% M1 U) nelse i=0;7 ^& c- u. f* ?5 |
if ( ++TimeOut>0x1000000)
( Y( N P6 S% w% M5 Kreturn (TimeOutErr);3 }' f) W3 x9 G7 |, K3 N
}
+ Y* ]! b. ?& A5 i% Lfor (i=0;i<0x40000;i++)1 W) d/ ]7 }% R7 R7 E/ G
{
* p7 X" P) v" Z! fData = *(FlashStart + i);
2 C0 m7 _# |, x; ^' F" v9 kif (Data !=0xFFFF)) G- Z: @( l: W9 V/ T
return (EraseErr);
p4 s n: H6 n- {7 @3 U# ^" b}
$ u: } t6 k$ areturn (EraseOK)
, k& c: v# q5 s9 F4 J为什么i<5,FlashStart + 0x3FFFF,++TimeOut>0x1000000 |
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