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FLASH擦除程序:# u: R. }. F4 R& Z# c
Uint16 ChipErase(void)8 a$ n& T; i. Y3 \3 ?6 a0 h; s* v/ O
{
( d2 |9 N; \9 m: G, k2 vUint16 Data;0 m( H0 [1 [# y" W+ D; f8 j, o( u
Uint32 TimeOut,i;
2 ?- r+ S! }/ |" ?, S+ L1 n X+ z/***********以下过程需要严格遵守**************************/- R8 R' G4 H- L
*(FlashStart + 0x5555) = 0xAAAA; //需要对FLASH的0x5555单元写0xAAAA
( J8 P: d8 X" a6 o' Z& C*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555) Z( o. T* C; ^# p( V: m- g
*(FlashStart + 0x5555) = 0x8080; //随后对FLASH的0x5555单元写0x8080;2 O* t% O9 T5 J- W/ q
*(FlashStart + 0x5555) = 0xAAAA; //乊后对FLASH的0x5555单元写0xAAAA8 r- S; \) I4 e0 \
*(FlashStart + 0x2AAA) = 0x5555; //需要对FLASH的0x2AAA单元写0x5555
7 N7 H$ ?8 S) H% W6 @*(FlashStart + 0x5555) = 0x1010; //需要对FLASH的0x5555单元写0x10103 E# b* }, V/ y" J% C/ S1 z
i = 0;2 R1 s' {, k! K% G. p% h* w+ y
TimeOut = 0;
2 t& t/ m4 h6 r* E$ s$ @while(i<5)
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Data = *(FlashStart + 0x3FFFF);$ N% U% ]- G; o: A- j
if (Data == 0xFFFF)8 ^% s; S. F+ f0 Q% E, \3 j
i++; k8 p- l5 l$ i( [4 q& g
else i=0;
0 R7 o0 i5 N: j. R8 Kif ( ++TimeOut>0x1000000)
5 W& [! q7 c. v; Hreturn (TimeOutErr);
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for (i=0;i<0x40000;i++)
) ~/ j6 @ J1 M1 H* m. `. b+ L! q{
@$ v6 } E/ C3 X5 y/ P8 b* nData = *(FlashStart + i);
5 Z3 _" P2 V) i. u9 ?if (Data !=0xFFFF)5 F; j6 Y3 U/ K6 x/ b( K3 {# c% Q( R
return (EraseErr);
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return (EraseOK)
9 t! @$ F! E7 ^# p e4 B) N9 h为什么i<5,FlashStart + 0x3FFFF,++TimeOut>0x1000000 |
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