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59 lines
2.3 KiB
Text
59 lines
2.3 KiB
Text
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First, some build notes on the Silicon Turnkey eXpress XTc.
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This board has both 87x/88x procesor options at various
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frequencies. The configuration file has some macros for setting
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the clock speed, not all have been tested. They all have
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a 10MHz input clock. Please do not check in a configuration
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file that selects a high speed not available on all processors.
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We chose the 66MHz core and bus speed, which should be OK on
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all boards. If you have a processor, lucky you! :-)
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Just build a new configuration with that speed, check
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the macro configuration to ensure it's correct. If the
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macro is updated, please check that in, but keep default
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processor speed.
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The board is likely to have more than 1Mbyte of NOR boot flash.
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It was also configured with a high boot vector (Dan's fault)
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so the standard 8xx mapping doesn't work well. We had to move
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the addresses around a little bit so one copy would work. The
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flash got fragmented, and we are working on a better solution.
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There is an "xtc.cfg" floating around for the BDI2000, use
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that for programming a new version of U-Boot. You can probably
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find it on the Silicon Turnkey eXpress (www.silicontkx.com),
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Embedded Alley Solutions (embeddedalley.com), or Denx (denx.de)
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servers.
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The board will also have various SDRAM sizes, but the code
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should automatically determine the amount of memory.
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There are a couple of different board versions, visually
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they use different BGA or surface mount memory parts. However,
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they are logically the same board.
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Now, some operational notes.
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The board has the option of sporting two FEC Ethernet ports.
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The second port isn't configured to be automatically available
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because it would cause U-Boot to generate a board data structure
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(the bd_t) with multiple MAC addresses and be incompatible with
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standard 8xx kernel builds. You can use/test the second FEC
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in U-Boot by assigning an 'eth1addr' and selecting the second
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FEC as the port to use.
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Since this is just a development board and not a product, STx
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does not assign unique MAC addresses. We just pilfer the
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"default" ones used by Wolfgang on some other boards. Please
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ensure you assign unique MAC addresses when using these boards.
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The serial port baud rate is 38400, because that's the way
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I like it :-)
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Thanks to Pantelis for lots of the work on this board port.
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Have Fun!
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-- Dan
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15 August 2005
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