硬件上是接的8位的NAND FLASH NAND128
下面是一段读ID的程序
/******************************************************************************
* Function Name : FSMC_NAND_ReadID
* Description : Reads NAND memory's ID.
* Input : - NAND_ID: pointer to a NAND_IDTypeDef structure which will hold
* the Manufacturer and Device ID.
* Output : None
* Return : None
*******************************************************************************/
void FSMC_NAND_ReadID(NAND_IDTypeDef* NAND_ID)
{
u32 data = 0;
/* Send Command to the command area */
*(vu8 *)(Bank_NAND_ADDR | CMD_AREA) = 0x90; //写读ID命令
*(vu8 *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
/* Sequence to read ID from NAND flash */
data = *(vu32 *)(Bank_NAND_ADDR | DATA_AREA); //读ID
NAND_ID->Maker_ID = data & 0xFF;
NAND_ID->Device_ID = (data & 0xFF00)>>8;
NAND_ID->Third_ID = (data & 0xFF0000)>>16;
NAND_ID->Fourth_ID = (data & 0xFF000000)>>24;
}
/* Sequence to read ID from NAND flash */
data = *(vu32 *)(Bank_NAND_ADDR | DATA_AREA);
//这句就看不懂了，为什么 能一次读32位 |
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楼主
发表于 2009-5-12 14:22
