RTEMS on Beaglebone Black

[Angelo Fraietta]

I just tried writing to the pins using the methods in the interrupt example

What is very strange is that pin P9-15 toggles whether I write to GPIO1_16
or GPIO2_0, which may be why the read is not correct on it

So in short,
I found that GPIO1_0 to GPIO1_3 did not read or write
I found that GPIO1_30 and GPIO1_31 did not read or write
I found that GPIO0_4 and GPIO0_5 did not read or write

P9-15 writes whether writing to GPIO1_16 or GPIO2_0

Any suggestions form here would be great

Thanks


On Wed, Jul 29, 2015 at 2:46 PM, Angelo Fraietta <
newsgroups at smartcontroller.com.au> wrote:

>
> I found the GPIO3 issue
> from https://github.com/majestik666/Beagle_GPIO/blob/master/Beagle_GPIO.cc
> I found the correct define would be
>
> #define GPIO3_ADDR 0x481AE000
>
> I just have to find out why the other pins failed
>
>
> On Wed, Jul 29, 2015 at 1:30 PM, Angelo Fraietta <
> newsgroups at smartcontroller.com.au> wrote:
>
>> I have done some more tests to check whether all inputs actually work.
>> I set all as inputs like this in the init
>>   *(unsigned long *)(GPIO0_ADDR+OE_ADDR) = 0xFFFFFFFF;
>>   *(unsigned long *)(GPIO1_ADDR+OE_ADDR) = 0xFFFFFFFF;
>>   *(unsigned long *)(GPIO2_ADDR+OE_ADDR) = 0xFFFFFFFF;
>>   *(unsigned long *)(GPIO3_ADDR+OE_ADDR) = 0xFFFFFFFF;
>>
>> And read them in a task while switching the pins between 1 and zero
>>
>>       data_0 = *(unsigned long *)(GPIO0_ADDR+GPIO_DATAIN);
>>       data_1 = *(unsigned long *)(GPIO1_ADDR+GPIO_DATAIN);
>>       data_2 = *(unsigned long *)(GPIO2_ADDR+GPIO_DATAIN);
>>       data_3 = *(unsigned long *)(GPIO3_ADDR+GPIO_DATAIN);
>>
>>
>> I found that GPIO1_0 to GPIO1_3 did not work
>> I found that GPIO1_30 and GPIO1_31 did not work
>> I found that GPIO0_4 and GPIO0_5 did not work
>>
>> I found GPIO1_16 is actually GPIO2_0 - which is very strange as all the
>> other GPIO2 are on P8
>> I found none of GPIO3 read a value
>>
>> Anyone have have any suggestions? Maybe an incorrect address for GPIO3?
>> #define GPIO0_ADDR 0x44E07000
>> #define GPIO1_ADDR 0x4804C000
>> #define GPIO2_ADDR 0x481AC000
>> #define GPIO3_ADDR 0x481AF000
>>
>> Thanks
>>
>> On Wed, Jul 29, 2015 at 11:49 AM, Chris Johns <chrisj at rtems.org> wrote:
>>
>>> On 29/07/2015 2:01 am, Joel Sherrill wrote:
>>> >
>>> >
>>> > On 7/28/2015 8:39 AM, Mr. Andrei Chichak wrote:
>>> >> Hey Angelo,
>>> >>
>>> >> If you have about an hour, listen to the embedded.fm podcast #110
>>> >> (www.embedded.fm <http://www.embedded.fm> or iTunes). They talk with
>>> >> Jason Kridner of Beagleboard.org <http://Beagleboard.org>, also from
>>> >> TI. He wants people to send him queries about the Beagle Boards, like
>>> >> your pinout questions.
>>> >>
>>> >> RTEMS even comes up in the conversation.
>>> >>
>>> >
>>> > I saw a tweet on this last week. I need to listen to Jason also.
>>> > He is a nice guy and the embedded.fm podcast is a great resource.
>>> >
>>>
>>> Great podcast.
>>>
>>> Chris
>>>
>>
>>
>
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