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SetupOverviewIn a typical development environment, the LPC2468 OEM Board boots from internal flash into RedBoot. eCos applications are configured for RAM startup and then downloaded and run on the board via the debugger arm-eabi-gdb. Preparing the board therefore usually involves programming a suitable RedBoot image into flash memory. The following RedBoot configurations are supported:
For serial communications, all versions run with 8 bits, no parity, and 1 stop bit at 38400 baud. This baud rate can be changed via the RedBoot baud command. Initial InstallationFlash InstallationThis process assumes that a Microsoft Windows machine with the Embedded Systems Academy Flash Magic utility is available. The first step is to set up the board as described in the Embedded Artists documentation. Install the FTDI USB driver from http://www.ftdichip.com/Drivers/VCP.htm and configure it as described in the Embedded Artists documentation. Install Flash Magic from http://www.flashmagictool.com. Install the ISP jumpers (P2.10 and RESET) and press the reset button. The board is now running a special NXP boot loader. Start Flash Magic and set the Communications section to select the FTDI USB device, 38400 baud, device LPC2468, Interface “None (ISP)” and 12MHz Oscillator Frequency. Test communication with the board by using the “ISP->Read Device Signature” menu entry. If communication is not successful, check that the USB cable is connected, the ISP jumpers are installed and the correct COM port is being used. Check “Erase blocks used by Hex File” under “Erase”. In the “Hex File” section, select the redboot_ROM.hex file. Under “Options”, all boxes should be clear except “Verify after programming”. Now press the “Start” button. The utility should show the progress of the upload. When the process completes, the utility should be closed. Verify the programming has been successful by starting a terminal emulation application such as HyperTerminal or minicom on the host PC and set the serial communication parameters to 38400 baud, 8 data bits, no parity, 1 stop bit (8N1) and no flow control (handshaking). Remove the ISP jumpers. Reset the board and RedBoot should start. The output should be similar to the following:
It is now necessary to initialize the flash file system and the flash configuration. This can be done with the following commands:
Replace the IP addresses in the above with those for your own network. The above also accepts the default for the MAC address, if more than one LPC2468 is to be used on the same network then different MAC addresses should be used; Embedded Artists boards are supplied with a sticker showing an assigned MAC address, and this should be used by preference. It is it ever necessary to reinstall RedBoot, the above directions can be repeated. Alternatively, a new RedBoot may be installed from RedBoot itself. It is not possible to do this directly, since RedBoot is executing from the flash that needs to be erased and reprogrammed. Instead it is necessary to run a RAM version of RedBoot, use that to download the new ROM RedBoot to RAM, and then program that to flash. The following shows an example session to do this. It assumes that redboot_RAM.srec and redboot_ROM.bin are available via TFTP on the server set up in fconfig.
Rebuilding RedBootShould it prove necessary to rebuild the RedBoot binary, this is done most conveniently at the command line. Assuming your PATH and ECOS_REPOSITORY environment variables have been set correctly, the steps needed to rebuild RedBoot for the LPC2468-16 are:
At the end of the build the install/bin subdirectory should contain the file redboot.hex. Substitute 32 for 16 in the above to build RedBoot for the LPC2468-32 module. |
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