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FLASH擦除程序:9 C3 |: K! ? z) s5 j3 L$ c: R
Uint16 ChipErase(void). w0 t4 L$ V( y, Y+ a* j0 f
{
u6 c7 V# [6 s# CUint16 Data;: z" T ]. {7 C
Uint32 TimeOut,i;) h- A5 V- g" ]5 M5 s1 k
/***********以下过程需要严格遵守**************************/
$ l5 _8 O3 ^% _) A, Y5 q: ?9 {*(FlashStart + 0x5555) = 0xAAAA; //需要对FLASH的0x5555单元写0xAAAA
8 G: C/ C$ H, _) J8 S4 H*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x55556 l4 x% H9 n1 g3 i, L+ {$ F' ~- x7 j
*(FlashStart + 0x5555) = 0x8080; //随后对FLASH的0x5555单元写0x8080;
, ~# L) A" b6 k& {0 E2 j+ o$ f$ g*(FlashStart + 0x5555) = 0xAAAA; //乊后对FLASH的0x5555单元写0xAAAA* i; _$ p% @ V5 a
*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555 " G/ H u) u1 f1 X- o
*(FlashStart + 0x5555) = 0x1010; //需要对FLASH的0x5555单元写0x1010
3 F) Z p, M0 _, l: si = 0;9 P" S' n7 y) e d
TimeOut = 0;
/ O! v7 h# O- ] v( Z# v4 pwhile(i<5)
9 g. j% P4 U' C& Z9 l% e2 u{* ~: f- t9 _ f3 q( y4 m
Data = *(FlashStart + 0x3FFFF);- t f5 \* b3 q/ Y; O- z
if (Data == 0xFFFF)
7 r2 d/ k ]( ci++;1 ^' S4 B7 l# s) F, [
else i=0;& K5 M4 G5 v0 O( N8 N8 Z
if ( ++TimeOut>0x1000000)
) T9 ~1 s5 z. e: g. Areturn (TimeOutErr);. m" E. p. {( y& f7 U1 Y# w% b
}: @) y2 E) e* e: I* f$ Q% e
for (i=0;i<0x40000;i++)
$ w' r% R' P( I& B{" D$ S5 S; {/ m% \
Data = *(FlashStart + i);6 g& t6 y5 m% @ I9 X5 W3 S5 q5 o# Z
if (Data !=0xFFFF)% ?) [8 t/ D1 U# J5 P6 T
return (EraseErr);! z i4 b0 J# M" q, S
}$ T. x; p+ P2 {0 @
return (EraseOK)- j9 j5 ~2 ]* K0 I2 Z
为什么i<5,FlashStart + 0x3FFFF,++TimeOut>0x1000000 |
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