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FLASH擦除程序:
$ v; A4 g5 d2 S. n% [Uint16 ChipErase(void)
; H' h# v- j: q! O4 Q: `4 o{
( ?* l& Z) U: {* m DUint16 Data;: S; C5 l: g. D- i" `" G3 ~8 A
Uint32 TimeOut,i;
& E! p" S1 w6 V/***********以下过程需要严格遵守**************************/
& U$ x2 k% g: d: C/ h" k/ e* R( D% Z6 w*(FlashStart + 0x5555) = 0xAAAA; //需要对FLASH的0x5555单元写0xAAAA
( G9 v+ o3 l( W6 A8 j$ n! _' f*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555
& F; p8 ~( F% k- E% c( J' _*(FlashStart + 0x5555) = 0x8080; //随后对FLASH的0x5555单元写0x8080;$ @7 M# J9 o7 ]) a- T# J- W' `
*(FlashStart + 0x5555) = 0xAAAA; //乊后对FLASH的0x5555单元写0xAAAA6 x' ^1 w o" A( A# F! F
*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555
$ _% c" k( |3 F+ k3 @! ?6 Q. n*(FlashStart + 0x5555) = 0x1010; //需要对FLASH的0x5555单元写0x1010
9 o1 \* D/ R9 C/ i) wi = 0;# `8 l' n# S$ J( i* Q
TimeOut = 0;
" ~7 t5 H5 ~% p9 A4 [( ~& `% W0 Twhile(i<5)5 R: ]! N5 ~" U9 t& t2 H/ y, j/ [: s
{( y- N2 r( m, b. o, E
Data = *(FlashStart + 0x3FFFF);, h# t9 o9 c6 @. q3 S
if (Data == 0xFFFF)
4 \* ?6 U& Y Y, M. D7 i9 Pi++;7 Y/ v) t' Z! n1 s, {/ U" c
else i=0;
4 ~$ \* F5 ?. E; aif ( ++TimeOut>0x1000000)
- c. a) c8 j, _7 H' S5 lreturn (TimeOutErr);0 F& f H: Y' s' x
}' j8 \8 T4 P3 k: Y
for (i=0;i<0x40000;i++) } @: _- w1 Q s" A6 I! m; V
{
# S" T" M2 b( R+ O% OData = *(FlashStart + i);% M: g. j; r. |4 d0 K+ ]8 [& ?
if (Data !=0xFFFF)
+ N$ ` e- Z3 s# M) I6 F; V+ xreturn (EraseErr);9 c; E6 v& o& t6 H" M* l4 u* p
}0 O% f- H. i) c4 X7 Z# Z- E* T* v
return (EraseOK)5 ^+ N" ^" K' [4 U, q3 [6 @" U
为什么i<5,FlashStart + 0x3FFFF,++TimeOut>0x1000000 |
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