我用MSP430单片机外挂K9F1208U0BNand Flash，读出ID为EC 74 A4 0C 和手册上EC 76 A5 0C不一样，另外查了几个BLOCK的坏快SPARE 6byte都不为0XFF,难道都是坏快？下面是一部分代码，有熟悉的大侠帮忙看看，谢谢！
//写命令
void NandWr_Cmd( unsigned char cmd )
{
P5DIR = 0XFF; //P5输出
ALE_Disable();
CE_Enable();
CLE_Enable();
RE_Disable();
WE_Enable();
P5OUT = cmd;
WE_Disable();
CE_Disable();
CLE_Disable();
return;
}
//写地址
void NandWr_Addr(unsigned char address )
{
P5DIR = 0XFF;
CE_Enable();
CLE_Disable();
ALE_Enable();
RE_Disable();
WE_Enable();
P5OUT = address;
WE_Disable();
CE_Disable();
ALE_Disable();
return;
}
//读一个字节
unsigned char NandRd_Data(void)
{
unsigned char databuf = 0;
P5DIR = 0;
CE_Enable(); //P5输入
RE_Enable();
databuf = P5IN;
RE_Disable();
CE_Disable();
return(databuf);
}
//写一个字节
void NandWr_Data(unsigned char data)
{
P5DIR = 0XFF;
CLE_Disable();
ALE_Disable();
CE_Enable();
WE_Enable();
P5OUT = data;
WE_Disable();
CE_Disable();
return;
}
//***************************************************************************
//* Name: NandFlashSpareRead
//* Input(s) : unsigned int NandAddr.
//* unsigned char *Buffer.
//* Returns : void
//* Description : x8 NAND flash page write
//* Because we are using a x8 NAND, the data width is 8bit (unsigned char *Buffer).
//* *Buffer should contain 512 Bytes data and 16 Bytes ECC information
//* Notes: NandAddr
//* A0 - A7 column address
//* A8 low/high half page selection
//* A9 - A16 low block address
//* A17 - A24 high block address
//* *buffer
//* |-----from startcolumn----->|---------->| one page
//* data field spare field
//***************************************************************************
void NandFlashSpareRead( unsigned long NandAddr , unsigned char *Buffer )
{
unsigned char NandStatus;
unsigned short i;
// for x8 NAND flash device, each page has 16 Bytes for spare
unsigned short StartColumn = 16 - (NandAddr & 0xf);
NandWr_Cmd( NAND_CMD_AREA_C ); //begin from "C" area
NandWr_Addr( ( unsigned char ) ( NandAddr & 0xf ) ); //column address for spare field
NandWr_Addr( ( unsigned char ) ( ( NandAddr >> 8 ) & 0xff) ); //Page & block address
NandWr_Addr( ( unsigned char ) ( ( NandAddr >> 16 ) & 0xff) ); //Page & block address
NandWr_Addr( ( unsigned char ) ( ( NandAddr >> 24 ) & 0xff) ); //Page & block address
//read NAND status register
NandWr_Cmd( NAND_CMD_RD_STATUS );
do
{
NandStatus = NandRd_Data();
}while(!(NandStatus & 0x40));
NandWr_Cmd( NAND_CMD_RD_DONE );
for ( i = 0; i < StartColumn; i++ )
Buffer = NandRd_Data();
} |
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