Thanks Luigi ! That helped me so much. It's a great clue!
On Thursday, June 13, 2013 at 1:12:36 PM UTC+4:30, Luigi Rinaldi wrote:
>
> I had the same problem, I resolved it exporting at least one pin for each
> GPIO. After that I can access GPIO0, GPIO2 and GPIO3 with mmap.
> It's not about pinmux
Great answer!
It came a little late for the project that I was working lol.
But even so, it was a good explanation and will still help many people.
Thanks,
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Hello everyone,
I am a little bit late in this topic, but I would like to share what I have
found.
The problem is basically the clock. Once we boot our BBB, clocking systems
for GPIO 1, 2 and 3 are disabled (GPIO0 will be always enabled).
We can enable them by:
- Exporting any pin on each port
Luigi very good, I also had this problem, and your solution worked for me
also.
But I still do not understand why it is necessary to export at least one
pin on each port to be able to access the GPIO with mmap.
Someone can explain me?
Em terça-feira, 11 de junho de 2013 23h41min10s UTC-3, Jacek
