SMART Embedded Computing MVME2502, Installation And User Manual

Page: 127 / 150

Boot System
MVME2502 Installation and Use (6806800R96L) 127
6.6 Updating U-Boot
To update the U-Boot, place the image in the RAM (address 0x1000000 in this example)
before copying it to the SPI flash.
The following procedure will replace the image in SPI bank 0:
1. Disable SPI write-protect in CPLD register
PLD Write Protect and I
2
C Debug Register
on page 107
.
2. Ensure FLASH_WP_N in SMT configuration switch (S2) is in the OFF position.
3. Select SPI flash # 0:
sf probe 0
4. Erase 0x90000 bytes starting at SPI address 0:
sf erase 0 0x90000
5. Write 0x90000 bytes from RAM address 0x1000000 starting at SPI address 0:
sf write 0x1000000 0 0x90000
To replace the image in SPI bank 1, replace step 3 with "Select SPI flash # 1:"
sf probe 1