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--- ea_lpc2478 [2011/09/10 08:35] – created admin
+++ ea_lpc2478 [2011/09/27 21:26] (current) – [Building uClinux] admin
@@ Line 1: / Line 1: @@
-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.
+====== Embedded Artists LPC2478 evaluation board ======
+===== Board specs =====
+  * ARM7TDMI with 512KB Flash and 96KB RAM
+  * External Flash: 128MB NAND, 4MB NOR
+  * External data memory: 32MB SDRAM
+  * 256Kbit I2C E2PROM
+  * 32.768kH RTC
+===== Building U-boot =====
+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
+  # 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
+===== U-boot flashing =====
+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.
+===== Building uClinux =====
+   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?
+====== Some links ======
+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