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