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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1782 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2009-05-14 23:37:34 +00:00
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38
configs/eagle100/README.txt
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@ -37,6 +37,44 @@ Toolchain
detailed PLUS some special instructions that you will need to follow if you are
building a Cortex-M3 toolchain for Cygwin under Windows.
Ethernet-Bootloader
^^^^^^^^^^^^^^^^^^^
Here are some notes about using the Luminary Ethernet boot-loader built
into the Eagle-100 board.
- The board has no fixed IP address but uses DHCP to get an address.
I use a D-link router; I can use a web browser to surf to the D-link
web page to get the address assigned by
- Then you can use this IP address in your browser to surf to the Eagle-100
board. It presents several interesting pages -- the most important is
the page called "Firmware Update". That page includes instructions on
how to download code to the Eagle-100.
- You will need the "LM Flash Programmer application". You can get that
program from the Luminary web site. There is a link on the LM3S6918 page.
- Is there any documentation for using the bootloader? Yes and No: There
is an application note covering the bootloader on the Luminary site, but
it is not very informative.
- Are there any special things I have to do in my code, other than setting
the origin to 0x0000:2000 (APP_START_ADDRESS)? No. The bootload assumes
that you have a vector table at that address . The bootloader does the
following each time it boots (after you have downloaded the first valid
application):
o The bootloader sets the vector table register to the APP_START_ADDRESS,
o It sets the stack pointer to the address at APP_START_ADDRESS, and then
o Jumps to the address at APP_START_ADDRESS+4.
- You can force the bootloader to skip starting the application and stay
in the update mode. You will need to do this in order to download a new
application. You force the update mode by holding the user button on the
Eagle-100 board while resetting the board. The user button is GPIOA, pin 6
(call FORCED_UPDATE_PIN in the bootloader code).
Eagle100-specific Configuration Options
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^