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GPIO

Started by Werner du Toit ●August 6, 2003
Hi All,

Is there anyone that have suggestions about general purpose IO on the C6711
without a daughter card???

I need 11 inputs and 5 outputs on the DSK? What can you suggest or recommend???

Thanks
Werner


Reply by Jeff Brower ●August 6, 20032003-08-06
Werner-

> Is there anyone that have suggestions about general purpose IO on the
> C6711 without a daughter card???
>
> I need 11 inputs and 5 outputs on the DSK? What can you suggest or
> recommend???

That's not easy. On C6711 you can use the TOUT pins and some McBSP pins,
but to get 14 total you might need to dedicate a CEn address space.

Jeff Brower
system engineer
Signalogic



Reply by Mike Dunn ●August 7, 20032003-08-07
Werner,
 
Are you ready to do some hacking??
 
If you need 11 unlatched inputs and 5 latched outputs you might be in business.  It will require the soldering of three wires to three unused latched outputs [TP16,17,18].  The rest of the connections can be made by inserting wires into the DC connectors [think that 24-26 ga fits nicley].
You can then use the upper 5 bits of the "LED port" for your output.[refer to sheet of schematics]
For input you can use the 11 lower bits of the DC data bus - just read 0xA0000000 for input.
 
good luck,
mikedunn

Werner du Toit <s...@tuks.co.za> wrote:
Hi All,

Is there anyone that have suggestions about general purpose IO on the C6711 without a daughter card???

I need 11 inputs and 5 outputs on the DSK? What can you suggest or recommend???

Thanks
Werner_____________________________________
Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group.

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Reply by Jeff Brower ●August 7, 20032003-08-07
Werner-

> I'm new to this DSP arena, what do you mean by dedicating some CEn address
> space?

Treat your I/O as an EMIF device from the DSP perspective, then choose an
available CEn address space and set it up for asynchronous access, sort of
like a slow memory.

> I still need to physically connect my device(Image Capturing Devive)
> somewhere, i suppose, but to where??

Mike's answer was very good and specific for the DSK C6711, so you might
try his method.

-Jeff

> ----- Original Message -----
> From: "Jeff Brower" <>
> To: "Werner du Toit" <>
> Cc: <>
> Sent: Wednesday, August 06, 2003 6:23 PM
> Subject: Re: [c6x] GPIO >> Werner-
>>
>> > Is there anyone that have suggestions about general purpose IO on the
>> > C6711 without a daughter card???
>> >
>> > I need 11 inputs and 5 outputs on the DSK? What can you suggest or
>> > recommend???
>>
>> That's not easy. On C6711 you can use the TOUT pins and some McBSP
>> pins,
>> but to get 14 total you might need to dedicate a CEn address space.
>>
>> Jeff Brower
>> system engineer
>> Signalogic