RTEMS on Beaglebone Black

[angelo fraietta]

On 16/02/2015 5:34 PM, Mathew Benson wrote:
> You're doing that in the CPU?  If all your doing is toggling a GPIO at a steady rate, why don't you just use the PRU and a PWM pin?  Or do you have RTEMS running in the PRU?

That is all I did in the test to see what sort of performance I could 
get just toggling a pin.  What I actually need to do is interrupt every 
640ns, and during that time, read 14 pins and store values in memory. 
Then, after 16 of these, toggle a pint.  After 10ms of this, I need to 
raise an event to read the 10ms worth of data, encode it, and send it 
via UDP.


> Sent from my iPad
>
>> On Feb 16, 2015, at 12:15 AM, angelo fraietta <newsgroups at smartcontroller.com.au> wrote:
>>
>> Greetings
>>
>> Have you got interrupts working on the GPIOs. Also, do you have any sample of reading and writing to GPIO. I need to see whether it is going to be fast enough,
>>
>> I ran a program (on linux) on beagle that used registers basically toggling an output. EG
>> http://vabi-robotics.blogspot.com.au/2013/10/register-access-to-gpios-of-beaglebone.html
>>
>> It toggled at rate of just under 1Mhz, and what was just doing a while 1 loop. I did not look even look at interrupts there and did nothing else - I didn't even do any reads of GPIO.
>>
>> I want to get interrupts happening at 1.56Mhz (preferable) and read 14 GPOI, sbut I could go to half the rate by reducing my sample rate.  The beagle runs at 1Ghz, so I think it should be able to handle it.
>>
>>
>> Thanks
>>
>>
>>
>>> On 23/01/2015 4:19 PM, Ben Gras wrote:
>>> All,
>>>
>>> A while ago I finished the basics needed to use the beaglebones and
>>> beagleboards with RTEMS. The hardware support isn't very complete yet.
>>> The code is merged with RTEMS mainline though. My fork of rtems-tools
>>> and RSB is needed for help with building.
>>>
>>> Full details on how to build it are here:
>>> http://www.shrike-systems.com/beagleboard-xm-beaglebone-black-and-everything-else-rtems-on-the-beagles.html
>>>
>>> I hope you like it :-). Let me know if you'd like any followup.
>>>
>>> Cheers,
>>> Ben
>>>
>>>
>>>
>>>
>>> On Thu, Jan 22, 2015 at 4:46 AM, angelo fraietta
>>> <newsgroups at smartcontroller.com.au> wrote:
>>>> Greetings
>>>> Does anyone know the status of the beaglebone port?
>>>>
>>>> Thanks
>>>>
>>>> ---
>>>> This email has been checked for viruses by Avast antivirus software.
>>>> http://www.avast.com
>>>>
>>>> _______________________________________________
>>>> users mailing list
>>>> users at rtems.org
>>>> http://lists.rtems.org/mailman/listinfo/users
>> -- 
>> Dr Angelo Fraietta
>> A.Eng, A.Mus.A, BA(Hons), Ph.D.
>>
>> PO Box 859
>> Hamilton NSW 2303
>>
>> Home Page
>>
>>
>> http://www.smartcontroller.com.au/
>>
>> There are those who seek knowledge for the sake of knowledge - that is CURIOSITY
>> There are those who seek knowledge to be known by others - that is VANITY
>> There are those who seek knowledge in order to serve - that is LOVE
>>     Bernard of Clairvaux (1090 - 1153)
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> http://www.avast.com
>>
>> _______________________________________________
>> users mailing list
>> users at rtems.org
>> http://lists.rtems.org/mailman/listinfo/users

---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com