On Thursday 07 January 2021 18:58:27 Gene Heskett wrote:
> On Thursday 07 January 2021 18:18:52 Peter C. Wallace wrote:
> > On Thu, 7 Jan 2021, Ralph Stirling wrote:
> > > Date: Thu, 7 Jan 2021 22:05:32 +0000
> > > From: Ralph Stirling <ralph.stirl...@wallawalla.edu>
> > > Reply-To: "Enhanced Machine Controller (EMC)"
> > > <emc-users@lists.sourceforge.net>
> > > To: "emc-users@lists.sourceforge.net"
> > > <emc-users@lists.sourceforge.net> Subject: [Emc-users] Rpi 3b+ to
> > > 7i90hd
> > >
> > > I have a Raspberry Pi 3b+ successfully talking to a
> > > Mesa 7c81, but am now trying to get it working with
> > > a 7i90hd. I have a very compact pcb made to go
> > > from the 2x20 header on the pi to the 2x13 header
> > > on the 7i90hd. It is wired:
> > >
> > > Signal Rpi 7i90hd
> > > SDI 19 13
> > > SDO 21 15
> > > SCK 23 11
> > > SCS 24 17
> > >
> > > +5V 2,4 26
> > > GND 6,9,20,25,30,34,39 10,12,14,16,18,20,22,24
> > >
> > > My test is:
> > > $ mesaflash --device 7i90hd --addr /dev/spidev0.0 --spi
> > > --readhmid
> > >
> > > Response is:
> > > unable to set bpw32, fallback to bpw8
> > > Unexpected cookie at 0100..0110:
> > > 00000000 00000000 00000000
> > > No 7I90HD board found
> > >
> > > Since a 7c81 works, it would seem my software setup is ok.
> > > The problem would seem to lie with either my little adapter
> > > board or with the 7i90hd. I have a bypass cap right between
> > > pins 4 and 6 on the RPi connector (22uF 0805 ceramic). Do
> > > I need to use a four layer board to have sufficient ground
> > > plane? I have copper pour on the top and bottom of the board,
> > > but it did not go between pins of the connectors.
> > >
> > > Any suggestions?
> > >
> > > Thanks,
> > > -- Ralph
> >
> > Looks right
> >
> > 2 layer should be fine as long as the ground is solid (wide)
> > between the 7I90 and the RPI (and lo longer than a couple of
> > inches
> >
> > You might try adding a pullup to SDO (7I90 15) to see if you read
> > 0xFFFFFFFF which would indicate the the 7I90 is not driving SDO
> >
> > Sure you have a SPI config in the 7I90?
>
> The rpspi driver should handle that.
>
But I missead the question, yes, he will need to install the spi version
of the firmware with mesaflash.
> > Peter Wallace
> > Mesa Electronics
> >
> > (\__/)
> > (='.'=) This is Bunny. Copy and paste bunny into your
> > (")_(") signature to help him gain world domination.
> >
> >
> >
> > _______________________________________________
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> Cheers, Gene Heskett
Cheers, Gene Heskett
--
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Genes Web page <http://geneslinuxbox.net:6309/gene>
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