• ARM7TDMI with 512KB Flash and 96KB RAM
• External Flash: 128MB NAND, 4MB NOR
• External data memory: 32MB SDRAM
• 256Kbit I2C E2PROM
• 32.768kH RTC

Embedded Artists provides patches for u-boot 1.1.6. This is a very old U-boot but we have to use it as our board is not supported on the main u-boot development line. The version of U-boot that we are using, 1.1.6, does not seem to be compilable under Codesourcery g++. A non-EABI tool is needed, like bare metal, therefore crosstool-ng is needed.

# build a u-boot.hex
cd u-boot
make distclean
make LPC2478OEM_Board_32bit_config
make
arm-linux-objcopy -I binary -O ihex u-boot.bin u-boot.hex

# u-boot.bin is a raw binary image
# u-boot is an image in ELF binary format, never used for booting
# u-boot.srec is in Motorola S-Record format
# convert binary to hex
arm-unknown-elf-objcopy -I binary -O ihex u-boot.bin u-boot.hex

jumper pin P2.10

powercycle the board and wait for USB serial device to be seen

run sudo lsusb until you see the device: “Future Technology Devices International…”, then figure out which tty port it is: should be /dev/ttyUSB0, but could be /dev/tty/USBx. Make sure your user has rw access to it

compile the utility:

gcc -o lpcisp lpc21isp_148x.c

Run the utility

./lpcisp u-boot.hex /dev/ttyUSB0 115200 14746

The download should begin immediately and take a minute or so.

Remove jumper on pin P2.10.

We can connect to the serial port terminal with minicom, using these settings: 115200 8N1 no flow control.

 tar -xzvf /home/juan/projects/ARM/arm7dev/uClinux-dist-20070130.tar.gz 
 cd uClinux-dist/
 rm -r linux-2.*
 tar -xzvf /home/juan/projects/ARM/arm7dev/linux-2.6.21.tar.gz 
 mv linux-2.6.21/ linux-2.6.x
 patch -p1 < /home/juan/projects/ARM/arm7dev/lpc2478_ea_patches/ea-uClinux-081020.diff 
 patch -p1 < /home/juan/projects/ARM/arm7dev/lpc2478_ea_patches/ea-v3_1_incr1.diff 
 export ARCH=arm
 export CPU=arm7tdmi 
 PATH=$HOME/install/usr/local/bin:${PATH}
 make menuconfig
 make CROSS_COMPILE=arm-elf-

 compile problem, adding '#include <limits.h>' after strings.h in scripts/mod/sumversion.c fixes the issue. 

 make CROSS_COMPILE=arm-elf- clean
 make CROSS_COMPILE=arm-elf- 

 make ARCH=arm CROSS_COMPILE=arm-uclinuxeabi- menuconfig
 make ARCH=arm CROSS_COMPILE=arm-uclinuxeabi- all
 
 disable I2C in linux config
 
 make ARCH=arm CROSS_COMPILE=arm-uclinuxeabi- CC=/home/juan/CodeSourcery/Sourcery_G++_Lite/bin/arm-uclinuxeabi-gcc LD=/home/juan/CodeSourcery/Sourcery_G++_Lite/bin/arm-uclinuxeabi-ld AR=/home/juan/CodeSourcery/Sourcery_G++_Lite/bin/arm-uclinuxeabi-ar NM=/home/juan/CodeSourcery/Sourcery_G++_Lite/bin/arm-uclinuxeabi-nm OBJCOPY=/home/juan/CodeSourcery/Sourcery_G++_Lite/bin/arm-uclinuxeabi-objcopy all
 
 why isn't CROSS_COMPILE variable recognized within linux/Makefile?
 

our development kit:
http://www.standardics.nxp.com/products/lpc2000/lpc24xx/
http://www.embeddedartists.com/products/uclinux/oem_lpc2478.php

documentation from the Embedded Artists support page:

• Embedded Artists Homepage
• LPC2478_OEM_Board_Users_Guide-Version_1.0_Rev_D.pdf
• Getting started with uClinux