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− | DHT-Walnut is a shortened name for the Digital Home Technologies PCB 01070201 Rev. 1.1. The DHT-Walnut board is based on the AMCC-Walnut (still available, and still expensive :P). It is a more improved board described at www.amcc.com. A "walnut" searching will inform about schematic and software. Also keep attention @ DENX: they have developed a lot for the AMCC-Walnut board, and you could find a linux patch for your problem, prettier documentation, developer suit, and much more: in case, you are suggested to have a look to their web pages.
| + | this information is in updating |
| + | please contact |
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− | The board consists of:
| + | speeder@alice.it |
− | * [[PPC405 GP|PowerPC 405GP]] running at 266mhz
| + | daredevil-coder@hotmail.com |
− | * PC133 SDRAM slot, currently, only supports single sidded [[DIMMs]]
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− | * On-chip 405GP ethernet, board doesn't have an ethernet MAC address
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− | * DCE serial port, speeds up to 230k, only tested to 115200
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− | * two pci slots, keyed for 5V only cards
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− | * Promise Technologies [[PDC20265]] IDE
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− | * 512k of boot flash AMD 29LV040B [[[Media:amd29lv040b.pdf]] datasheet]
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− | * 12v dc powered
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− | * PPC40XX [[JTAG]] on J10
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− | * 6.00" x 7.5" board size
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− | The system's most common configuration seems to be:
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− | * System PCB
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− | * 32M PC133 SDRAM DIMM
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− | ** Unknown PCI IEEE-1394 card supported by OHCI driver
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− | ** [[PPCBoot]] v.1.1.2 in flash
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− | [[Image:com1191.jpg]]
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− | Some info in the pdf [http://supernova.stanford.edu/dingdong/ HERE]
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− | Experimental hack to set a hardware breakpoint inside OCD Commander [[[Media:hardbreak.tgz]] hardbreak.tgz]
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− | * OCD Commander macro file to dump the CPU configuration (all but PCI) [[[Media:dump_config.mac]] dump_config.mac]
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− | * OCD Commander macro file to configure the system for recovery [[[Media:recovery_config.mac]] recovery_config.mac]
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− | * CPU configuration of the system after a warm reset [[[Media:warm_reset.config]] warm_reset.config]
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− | * CPU configuration of the system once ppcboot v1.1.2 is up and running [[[Media:ppcboot.config]] ppcboot.config]
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− | * CPU configuration of the system once ppcboot v1.1.6 is up and running [[[Media:ppcboot_116.config]] ppcboot_116.config]
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− | * Example OCD logfile of the using the recovery macro to load ppcboot [[[Media:ocd_recovery_log.txt]] ocd_recovery_log.txt]
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− | * Example console log from ppcboot v.1.1.6 running from ram after recovery macro [[[Media:ocd_recovery_console_log.txt]] ocd_recovery_console_log.txt]
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− | == Bootloaders ==
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− | * ppcboot
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− | Here is the latest ppcboot 1.1.6 patch, as is, it will build for flashing at 0xfff80000 as a replacement for the pcboot-1.1.2 that comes with the board.
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− | [[[Media:patch-ppcboot-1.1.6-km2]] patch-ppcboot-1.1.6-km2]
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− | Original sources for ppcboot: [ftp://ftp.denx.de/pub/ppcboot/ppcboot-1.1.6.tar.bz2]
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− | Here is a binary for those without a toolchain.
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− | [[[Media:ppcboot1.1.6.1.bin]] ppcboot1.1.6.1.bin] crc = 083fb0a3
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− | To use this (at your own risk) see the detailed update procedure description: [wiki:DHT-WalnutInstallingTheUpdatedBootloader Installing the Updated Bootloader]
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− | * U-Boot
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− | U-Boot is a significantly updated replacement for ppcboot. See: [wiki:DHT-Walnut-U-Boot U-Boot for the DHT-Walnut].
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− | Just in case you make a brick, there is hope: [wiki:DHT-WalnutJtagBootloaderInstallation JTAG Bootloader Installation]
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− | == Linux Kernels ==
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− | * Version 2.4
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− | (Mostly) working kernel binary and config from jbevren with matrox fbcon and usb input support.
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− | Current issues:
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− | ** USB keyboard input doesnt seem to work, but events reach /dev/input/event0
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− | ** [[Media:uImage]]
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− | ** [[Media:config]]
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− | * Version 2.6
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− | See: [wiki:DHT-Walnut2.6LinuxKernel 2.6 Linux kernel for the DHT-Walnut].
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− | == How-To's ==
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− | * How To [wiki:DHT-WalnutInstallingTheUpdatedBootloader replace the bootloader with ppcboot 1.1.6]
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− | * How To [wiki:DHT-Walnut-U-Boot replace the bootloader with U-boot 1.1.4]
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− | * How To [wiki:DHT-WalnutJtagBootloaderInstallation recover from "Brickage"]
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− | * How To [wiki:DHT-WalnutAddJ10 add the JTAG connector at J10]
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− | * How To [wiki:DHT-WalnutBootViaTftp boot via tftp]
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− | * How To [wiki:DHT-WalnutBootingFromHdd boot from Hard Disk]
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− | * How To [wiki:DHT-WalnutUsefullProjects do something useful with your board]
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− | * How To [wiki:DHT-WalnutGPIO control the Green Media LED and J5]
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− | * More to come...
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− | if you want, you could add your contact here
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− | feel free to contact me
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− | msn: daredevil-coder@hotmail.com
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− | email: speeder@alice.it
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