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Nios Development Kit
Cyclone Editions
Last Update: October 15, 2003
====================================================================
This file contains information regarding U-Boot and the Altera
Nios Development Kit, Cyclone Edition (DK-1C20). For general Nios
information see doc/README.nios.
For those interested in contributing ... see HELP WANTED section
in doc/README.nios.
Files
------
board/dk1c20/*
include/configs/DK1C20.h
Memory Organization
--------------------
-The heap is placed below the monitor (U-Boot code).
-Global data is placed below the heap.
-The stack is placed below global data (&grows down).
Misc
-----
The hello_world example works fine.
Programming U-Boot into FLASH with GERMS
-----------------------------------------
The current version of the DK-1C20 port occupies less than
60 KByte with network support disabled. So everything will fit
into a single flash sector. With network support (e.g. bootp,
tftpboot, ping, etc) the flash footprint is about 77K.
To program U-Boot into the DK-1C20 flash using GERMS do the
following:
1. From the command line, download U-Boot using the nios-run:
$ nios-run -r u-boot.srec
This takes about 45 seconds (GERMS is not very speedy here).
After u-boot is downloaded it will be executed. You should
see the following:
U-Boot 1.0.0-pre (Oct 4 2003 - 07:39:24)
CPU: Nios-32 Rev. 3.08 (0x3018)
Reg file size: 256 LO_LIMIT/HI_LIMIT: 2/14
Board: Altera Nios 1C20 Development Kit
In: serial
Out: serial
Err: serial
==>
2. Quit nios-run and start your terminal application (e.g. start
Hyperterminal or minicom).
3. From the U-Boot command prompt, erase a sector of flash at 0x40000:
==> erase 40000 4ffff
4. Download the u-boot code to RAM. When using Hyperterminal, do the
following:
--From the u-boot command prompt start a binary download to SRAM:
==> loadb 800000
--Download u-boot.bin using kermit.
5. Copy the binary image from SRAM to flash:
==> cp.b 800000 40000 10000
U-Boot will now automatically start when the board is powered on or
reset using the Standard-32 configuration. To start U-Boot with the
Safe-32 configuration, enter the following GERMS command:
+ g 40000
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