static void nand_send_addr(unsigned int addr)
{
nand_addr(addr & 0xff); /* a0~a7 */
nand_addr((addr >> 8) & 0x7); /* 程序的角度: a8~a10 */
nand_addr((addr >> 11) & 0xff); /* 程序的角度: a11~a18 */
nand_addr((addr >> 19) & 0xff); /* 程序的角度: a19~a26 */
nand_addr((addr >> 27) & 0xff); /* 程序的角度: a27 ~ */
}
void NF_PageRead(unsigned long addr,unsigned char* buff)
{
int i;
/* 选中芯片 */
select_ship();
/* 清除RnB */
clean_RnB();
/* 发出命令0x00 */
nand_cmd(0x00);
/* 发出列地址 */
nand_addr(0x00);
nand_addr(0x00);
/* 发出行地址 */
nand_addr(addr&0xff);
nand_addr((addr >>8 ) & (0xff));
nand_addr((addr >>16 ) & (0xff));
/* 发出命令0x30 */
nand_cmd(0x30);
/* 等待就绪 */
wait_RnB();
/* 读数据 */
for(i = 0; i<1024*2; i++)
{
*buff++ = NFDATA;
}
/* 取消片选 */
delselect_ship();
}
int nand_erase_block(unsigned long addr)
{
int page = addr / 2048;
nand_select();
nand_cmd(0x60);
nand_addr(page & 0xff);
nand_addr((page >> 8) & 0xff);
nand_addr((page >> 16) & 0xff);
nand_cmd(0xd0);
wait_ready();
nand_deselect();
}
