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References: <87frpoewse.fsf@nightsong.com> <vfhgqc$3sajh$1@paganini.bofh.team> <nnd$3f211a52$6471e577@90b515f8c9cad0a3> <vfjfk9$3v0b0$4@paganini.bofh.team>
From: albert@spenarnc.xs4all.nl
Subject: Re: 1 euro Olimex RISC-V mini-PC: this needs Forth ;)
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In article <vfjfk9$3v0b0$4@paganini.bofh.team>,
Waldek Hebisch <antispam@fricas.org> wrote:
>albert@spenarnc.xs4all.nl wrote:
>> In article <vfhgqc$3sajh$1@paganini.bofh.team>,
>> Waldek Hebisch <antispam@fricas.org> wrote:
>> <SNIP>
>>>
>>>BTW: Chip datasheet talks about ports and pin numbers within
>>>ports, Milkv Duo picture uses pin numbers but there is mixup
>>>with ports.  There is command line outility to deal with pins,
>>>it uses different numbering similar to numbering on the board
>>>but not the same.  Linux uses still different ping numbering.
>>>Above I use pin number withing port + 32*port number where
>>>ports are numbered from 0.
>>
>> That is a sensible convention, I use the same.
>> In my riscv board the output are marked i.e. GD13 that
>> has assigned the Forth io number (^D-1)*0x20 +13 .
>> That gets 0x6D .
>
>64 MB Milkv Duo board has marking like GP0, GP1, etc.  As I wrote
>this does not agree with most other sources.  I think 256 MB
>version has "the same" marking, but probably slightly different
>correspondence with ports and lines withing ports.  Milkv
>Duo S has different connectors and no marking on the board.
>Each has different chip, 64 MB is CV1800B (68 pin QFP, 1 GHz Risc-V +
>700MHz Risc-V + 8051), 256 MB is SG2002 (88 pin QFP, 1GHz Arm +
>1 GHz Risc-V + 700MHz Risc-V + 8051), Duo-S had 512 MB RAM and
>uses SG2000 (205 pin BGA, 1GHz Arm + 1 GHz Risc-V + 700MHz Risc-V +
>8051).  On 64 MB duo there are some pins that apparently can be
>connected to two different ports, reference via "canonical" label
>of a pin would exclude such thing.

Well. The DongshanNezhaSTU has a 9 page schematic and the 260 pin DDR4
external finger connector has a legenda like PG4 and PD17 that refer
directly to the Soc description.
I suggest getting this documentation from the manufacturer, because
it is essential to using the board.

>
>--
>                              Waldek Hebisch
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