Jeff,
Your advice was exactly what I needed. Thanks again for the help that
you've provided to me and others!
Damon
Damon-
>
>> I am working on a project for school using the TMS320C6713 DSK. We need
>> to control two DC motors and both motors need to go forward, stop, or
>> reverse. We plan to use a pair of H-bridges so this will require four
>> DC signals from the DSK. Our team has gone through the tech refs and
>> talked to TAs and our professor, but we are still not sure how to get
>> these DC control signals from the DSK. Two solutions we have thought of
>> are as follows:
>>
>> 1) Perhaps we could tap into the 4 LEDs and use them as the base for a
>> MOSFET.
>> 2) Maybe we could run wires from the slots for peripheral devices.
>>
>> Maybe I'm wrong but these solutions seem like rigs to me and I would
be
>> really surprised if there isn't a better way to get some DC signals,
>> like maybe a peripheral card that plugs into the DSK or maybe even a
>> feature of the DSK itself that I am overlooking.
>>
>> Any advice is greatly appreciated. Thank you for your time.
>
>Suggest to look for GPIO signals on the daughtercard (expansion) connections.
The McBSP signals can also be defined
>as GPIO (see C6000 series McBSP reference guide).
>
>This is not a "rig" by any stretch. Using the expansion headers is acceptable
and expected -- just because you're not
>plugging a slick off-the-shelf daughtercard on there doesn't mean that
conceptually you're not doing the same thing.
>To make it look better, get some mating connectors from Samsung and either use
a piece of small proto board and/or
>some ribbon cable.
>
>Jacking the LEDs is not a good idea as you may need those to show DSP code
state/status. They can be very useful
>during debug.
>
>Also, suggest to be careful of GPIO signal level. The header signals are
buffered and should have decent drive, maybe
>8 to 12 mA, at 3.3V. You could probably drive 5V inputs, but under no
circumstances should you do that the opposite
>way and drive the DSP signals with 5V.
>
>-Jeff
Re: What is the best way to control two DC motors with the TMS320C6713 DSK?
Started by ●April 13, 2007
Reply by ●April 13, 20072007-04-13
Damon-
> Your advice was exactly what I needed. Thanks again for the help that you've provided to me and others!
Sure, glad to be of help.
Btw, I said 'Samsung' for DSK board expansion header mating connectors, I meant Samtec. Also Samtec has a fast sample
service.
-Jeff
> Damon-
>>
>>> I am working on a project for school using the TMS320C6713 DSK. We need
>>> to control two DC motors and both motors need to go forward, stop, or
>>> reverse. We plan to use a pair of H-bridges so this will require four
>>> DC signals from the DSK. Our team has gone through the tech refs and
>>> talked to TAs and our professor, but we are still not sure how to get
>>> these DC control signals from the DSK. Two solutions we have thought of
>>> are as follows:
>>>
>>> 1) Perhaps we could tap into the 4 LEDs and use them as the base for a
>>> MOSFET.
>>> 2) Maybe we could run wires from the slots for peripheral devices.
>>>
>>> Maybe I'm wrong but these solutions seem like rigs to me and I would be
>>> really surprised if there isn't a better way to get some DC signals,
>>> like maybe a peripheral card that plugs into the DSK or maybe even a
>>> feature of the DSK itself that I am overlooking.
>>>
>>> Any advice is greatly appreciated. Thank you for your time.
>>
>>Suggest to look for GPIO signals on the daughtercard (expansion) connections. The McBSP signals can also be defined
>>as GPIO (see C6000 series McBSP reference guide).
>>
>>This is not a "rig" by any stretch. Using the expansion headers is acceptable and expected -- just because you're
>> not
>>plugging a slick off-the-shelf daughtercard on there doesn't mean that conceptually you're not doing the same thing.
>>To make it look better, get some mating connectors from Samsung and either use a piece of small proto board and/or
>>some ribbon cable.
>>
>>Jacking the LEDs is not a good idea as you may need those to show DSP code state/status. They can be very useful
>>during debug.
>>
>>Also, suggest to be careful of GPIO signal level. The header signals are buffered and should have decent drive,
>> maybe
>>8 to 12 mA, at 3.3V. You could probably drive 5V inputs, but under no circumstances should you do that the opposite
>>way and drive the DSP signals with 5V.
>>
>>-Jeff
>>
>
> Your advice was exactly what I needed. Thanks again for the help that you've provided to me and others!
Sure, glad to be of help.
Btw, I said 'Samsung' for DSK board expansion header mating connectors, I meant Samtec. Also Samtec has a fast sample
service.
-Jeff
> Damon-
>>
>>> I am working on a project for school using the TMS320C6713 DSK. We need
>>> to control two DC motors and both motors need to go forward, stop, or
>>> reverse. We plan to use a pair of H-bridges so this will require four
>>> DC signals from the DSK. Our team has gone through the tech refs and
>>> talked to TAs and our professor, but we are still not sure how to get
>>> these DC control signals from the DSK. Two solutions we have thought of
>>> are as follows:
>>>
>>> 1) Perhaps we could tap into the 4 LEDs and use them as the base for a
>>> MOSFET.
>>> 2) Maybe we could run wires from the slots for peripheral devices.
>>>
>>> Maybe I'm wrong but these solutions seem like rigs to me and I would be
>>> really surprised if there isn't a better way to get some DC signals,
>>> like maybe a peripheral card that plugs into the DSK or maybe even a
>>> feature of the DSK itself that I am overlooking.
>>>
>>> Any advice is greatly appreciated. Thank you for your time.
>>
>>Suggest to look for GPIO signals on the daughtercard (expansion) connections. The McBSP signals can also be defined
>>as GPIO (see C6000 series McBSP reference guide).
>>
>>This is not a "rig" by any stretch. Using the expansion headers is acceptable and expected -- just because you're
>> not
>>plugging a slick off-the-shelf daughtercard on there doesn't mean that conceptually you're not doing the same thing.
>>To make it look better, get some mating connectors from Samsung and either use a piece of small proto board and/or
>>some ribbon cable.
>>
>>Jacking the LEDs is not a good idea as you may need those to show DSP code state/status. They can be very useful
>>during debug.
>>
>>Also, suggest to be careful of GPIO signal level. The header signals are buffered and should have decent drive,
>> maybe
>>8 to 12 mA, at 3.3V. You could probably drive 5V inputs, but under no circumstances should you do that the opposite
>>way and drive the DSP signals with 5V.
>>
>>-Jeff
>>
>
