U-Boot操作Flash (NOR, NAND & SPI)

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 

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