#define NFDATA_READ *(volatile unsigned char*)0x70200010

字节读写

#define NFDATA_READ *(volatile unsigned int*)0x70200010

字读写

 

读ID代码：

int nand_read_id(void){       int id;    NAND_CHIP_ENABLE();    set_val(NFCMMD, 0x90);    set_val(NFADDR, 0x00);    NAND_READY();    printf("id0 = %02x", NFDATA_READ);    printf(" id1 = %02x\n", NFDATA_READ);    NAND_CHIP_DISABLE();}

擦块代码：

void nand_block_erase(u32 addr){    int i;    NAND_CHIP_ENABLE();    set_val(NFCMMD, CMD_NAND_BLOCK_ERASE_STAGE1); //命令0x60    //发送地址    send_row_addr(addr);       set_val(NFCMMD, CMD_NAND_BLOCK_ERASE_STAGE2); //命令0xD0    //等待数据擦除    NAND_READY();    set_val(NFCMMD, CMD_NAND_READ_STATUS); //命令0x70    if (NFDATA_READ & 0x1)        printf("Nand Block Erase Faile.\n");    NAND_CHIP_DISABLE();}