U-Boot操作Flash (NOR, NAND & SPI)

来源：互联网发布：新农合软件编辑：程序博客网时间：2024/04/29 14:15

U-Boot中操作三种flash的命令集：
Action NOR NAND SPI
Copy Flash to RAM cp.[bwl] nand read eeprom read

Write to Flash from RAM cp.[bwl] nand write eeprom write

Dump Flash md.[bwl] nand dump eeprom read

Ease Flash erase nand erase n/a

Write Protection protect on nand lock

protect off nand unlock n/a

Additional Info flinfo nand info

imls nand bad n/a

U-Boot中查看命令帮助：
MB680> help cp
MB680> help nand
MB680> help eeprom

nor烧写命令：
MB680> nfs $load_addr /export/u-boot.bin
MB680> protect off 1:0-4
MB680> erase 1:0-4
MB680> cp.b $load_addr A0000000 $filesize
MB680> protect on 1:0-4
nor烧写内置命令：
MB680> nfs $load_addr /export/u-boot.bin
MB680> run unprot
MB680> run update

nand烧写命令：
MB680> nfs $load_addr /export/u-boot.bin
MB680> nand erase 0 40000
MB680> nand write $load_addr 0 40000
U-Boot启动内核的时候使用的命令是nand read.i c0008000 80000 500000;bootm c0008000

在nand中0x80000处开始的5M的数据拷到sdram0xc0008000处，从这个地址开始执行。

spi烧写命令：
MB680> nfs $load_addr /export/u-boot.bin
MB680> eeprom write $load_addr 0 $filesize

0 0