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Keymile kmeter1 Board
1. Alternative Boot EEPROM
Upon the kmeter1 startup the I2C_1 controller is used to fetch the boot
configuration from a serial EEPROM. During the development and debugging
phase it might be helpful to apply an alternative boot configuration in
a simple way. Therefore it is an alternative boot eeprom on the PIGGY,
which can be activated by setting the "ST" jumper on the PIGGY board.
2. Memory Map
BaseAddr PortSz Size Device
----------- ------ ----- ------
0x0000_0000 64 bit 256MB DDR
0x8000_0000 8 bit 256KB GPIO/PIGGY on CS1
0xa000_0000 8 bit 256MB PAXE on CS3
0xe000_0000 2MB Int Mem Reg Space
0xf000_0000 16 bit 256MB FLASH on CS0
The current realization is made with four 16-bits memory devices.
Mounting options have been foreseen for device architectures from
4Mx16 to 512Mx16. The kmeter1 is equipped with four 32Mx16 devices
thus resulting in a total capacity of 256MBytes.
3. Compilation
Assuming you're using BASH shell:
export CROSS_COMPILE=your-cross-compile-prefix
cd u-boot
make distclean
make kmeter1_config
4. Downloading and Flashing Images
4.0 Download over serial line using Kermit:
[Drop to kermit:
send <u-boot-bin-image>
Or via tftp:
tftp 10000 u-boot.bin
=> run load
Using UEC0 device
TFTP from server; our IP address is
Filename '/tftpboot/kmeter1/u-boot.bin'.
Load address: 0x200000
Loading: ##############
Bytes transferred = 204204 (31dac hex)
4.1 Reflash U-boot Image using U-boot
=> run update
..... done
Un-Protected 5 sectors
..... done
Erased 5 sectors
Copy to Flash... done
..... done
Protected 5 sectors
Total of 204204 bytes were the same
Saving Environment to Flash...
. done
Un-Protected 1 sectors
. done
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
. done
Protected 1 sectors
. done
Protected 1 sectors
5. Notes
1) The console baudrate for kmeter1 is 115200bps.