This demo is targeted towards the Olimex LPC-L2294 board, with 1 MB external RAM and 2 MB external Flash EEPROM.

The demo programs are pre-configured for building with the Codesourcery G++ Lite (Target OS EABI) toolchain. Alternatively, you can use the GCC ARM Embedded toolchain.

To program the bootloader into the internal flash on the LPC2294 microcontroller, the Olimex ARM-USB-TINY-H JTAG interface was used in combination with OpenOCD 0.4.0. However, this is not required if you have another means of programming the internal flash.

Please note that the board that was used for the demo had a modified external crystal oscillator of 20 MHz, instead of the standard 14.74 MHz crystal to allow for better matching CAN baudrate. If you use the 14.74 MHz crystal, please update configurable BOOT_CPU_XTAL_SPEED_KHZ in file “config.h”.

Before the bootloader can be used, it needs to be built and programmed into the LPC2294's internal flash memory. The steps in this section only need to be done once.

Batch files are added to aid in building the software program. First clean the bootloader program by double-clicking the file “\Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\cmd\clean.bat”. Next, build the bootloader program by double-clicking the file “\Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\cmd\build.bat”. The output should look like:

+++ Assembling [cstart.o]

+++ Compiling [hooks.o]

+++ Compiling [main.o]

+++ Compiling [boot.o]

...

+++ Linking [openblt_olimex_lpc_l2294_20mhz.elf]

...

+++ Build complete [openblt_olimex_lpc_l2294_20mhz.hex]

The bootloader program is now ready to be programmed into the internal flash memory of the LPC2294. Using your favorite programmer, flash the bootloader using one of the following files, depending on what file type your programmer supports:

• \Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\bin\openblt_olimex_lpc_l2294_20mhz.elf

• \Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\bin\openblt_olimex_lpc_l2294_20mhz.hex

Batch files are added to aid in building the demo program. First clean the demo program by double-clicking the file “\Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Prog\cmd\clean.bat”. Next, build the demo program by double-clicking the file “\Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Prog\cmd\build.bat”. The output should look like:

+++ Assembling [cstart.o]

+++ Compiling [main.o]

...

+++ Linking [demoprog_olimex_lpc_l2294_20mhz.elf]

...

+++ Build complete [demoprog_olimex_lpc_l2294_20mhz.sx]

The output file is

• \Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Prog\bin\demoprog_olimex_lpc_l2294_20mhz.sx

To download the demo program \Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Prog\bin\demoprog_olimex_lpc_l2294_20mhz.sx using the bootloader, follow the instructions in the following links, depending on the communication interface you intend to use:

• Firmware updates using the UART communication interface

• Firmware updates using the CAN communication interface

The Olimex LPC-L2294 board has an additional 2MB of external Intel C3 flash. This demo includes support for programming this external flash EEPROM with the bootloader. This also demonstrates the hook function functionality through which additional memory devices can be supported in the bootloader. To enable programming of the external flash EEPROM, open “\Target\Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\blt_conf.h” and change the value of BOOT_NVM_HOOKS_ENABLE:

#define BOOT_NVM_HOOKS_ENABLE           (1)

After this, follow the steps outlined above, to rebuild and reprogram the bootloader and user program.