| FREERTOS COLDFIRE MCF523x PORT with lwIP
|The FreeRTOS port is designed for the MCF523x processor where the hardware
|dependent part consists of the CPU and the peripherals used in this port.
|This includes a programmable timer (PIT) for the preemptive scheduler
|and a UART for the demo application. The Coldfire specific part includes
|the number and type of processor registers, the stack frame layout and
|the usage of a software interrupt (trap) for the yield call.
|The development environment used is based on the GNU C Compiler for
|a m68k-elf target as well as the insight debugger with some patches for
|the BDM interface. GDB startup and linker scripts are supplied with
|the demo for the M5235BCC evaluation kit from Freescale.
|  ... BDM tools: http://sourceforge.net/projects/bdm/
|A makefile is supplied with the demo application and a binary can be
|produced by calling 'make all'. A special target 'debug' is provided
|which executes the insight debugger. At the insight debugger prompt
|one should select the appropriate target interface (either BDM/Direct
|or BDM/TCP) and should download the application to the development
|board. It is important that the GDB script setup-and-load is executed
|prior to downloading to initialize the SDRAM. After downloading one
|should call the GDB function 'execute' and the PC is set to the start
|of the executable. Execution can be started by typing 'continue' at
|the Insight console interface.
|After this startup phase the insight debugger should work as usual, i.e.
|no grayed out buttons, ...
|Most of the problems have their origin in the startup scripts. The
|following list should serve as a checklist where each point must be
|satisfied for the port to work.
| - The FreeRTOS port only works correctly in the supervisor mode. There-
| fore the Coldfire CPU must run in the supervisor mode.
| - portVECTOR_TABLE does not point to the currently active vector table.
| Please also note that the vector table must be in RAM such that the
| FreeRTOS port can install a traphandler for the portYIELD() call.
|$Id: README.txt,v 1.1 2006/08/29 02:24:03 wolti Exp $
|MCF5235 + lwIP port - Copyright (c) 2006 Christian Walter.