"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> start Table of Contents Serial NOR Flash Using eeprom command Write uClinux kernel to serial flash and boot linux Serial NOR Flash U-boot supports Serial NOR Flash - a four-wire SPI-compatible interface as used for serial EEPROM which provides a sequential read access. They offer densities up to 8Mbytes.ST Flash has been validated with uClinux/Blackfin, and drivers are avalible. You can build U-boot to boot from Serial NOR Flash, and you can also read and write the serial flash using U-Boot command eeprom. Using eeprom command Write uClinux kernel to serial flash and boot linux Firstly tftp download a file to one memory address (e.g., 0×1000000), then use eeprom write command to copy the file to the SPI flash address(For example, 0×100000). stamp> tftp 0x1000000 uImage stamp> eeprom write 0x1000000 0x100000 $(filesize) When done, use eeprom read command to copy it out to another memory address, e.g, 0×2000000. Then use cmp.b command to compare if the data at these two addresses are identical. Finally bootm the kernel that is copied from SPI flash. The commands are: stamp> eeprom read 0x2000000 0x100000 $(filesize) stamp> cmp.b 0x1000000 0x2000000 $(filesize) stamp> bootm 0x2000000 eepromcompiling_u-boot The page enabling_jffs2 shows details on how to write kernel image and JFFS2 file system image to serial NOR flash, and enable kernel to access serial NOR flash.
