LINUX AT91 GPIO DRIVER

I should have titled the subject, “The most basic Linux questions in the world” to get the most eyes. Rain dance time, IH. Glad I am not the only one trying to figure this out. Linux does not allow to access the ports directly “segmentation fault”. I would kindly appreciate any help in the issue.

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Drive a GPIO on a SAM9xEK via Linux – Welcome to AT91SAM Community Discussions

Linux does not allow to access the ports directly “segmentation fault”. If I had to write an application, how would I control this port? Then i looked for the linuxkernel in my buildroot directorie and read these files: I have always used micros in bare metal fashion and have always had direct control to drive GPIO ports however I wanted.

One pin will be left arrow, other will be right: Configure gpio pin as output: I eventually will need to drive some GPIOs high or low depending on a condition very slow binary status stuff. Linuux should have titled the subject, “The most basic Linux questions in the world” to linud the most eyes.

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Let’s say we want to use GPIO5 as output. Is there a low level command in Linux that can access already known ports that will allow me to drive this port or a way to accomplish this without adding a new device with it’s own Linux driver? I would be interested in seeing some application implementation examples as well. The gpip with Linux shell is the following: Sign in Sign in Remember me Forgot username or password?

On top of this, GPIO keys functionality can be used for user space programs. Pls, can anyone provide directions what to do? I would kindly appreciate any help in the issue. Thanks for the PI link. How do i find or where is this table definig the banks?

Glad I am not the only one trying ta91 figure this out. So it needs to be done with linux drivers. No registered users and 2 guests. Create free account Forgot password?

Last edited by jcarrillo on7: It is a kernel code. Hello Caglar, thanks for the swift reply.

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Welcome to AT91SAM Community Discussions

Chronological Newest First Hi this should be trivial – but still too much for me. That is exactly what I was looking for.

The Device Tree is for configuring the board, and are used by the device drivers in the kernel. Rain dance time, IH. Arduino Robotics Lonnie Honeycutt. linkx

Linux sam9263: How to read a button?

I guess a question can’t get any more basic than this one. What includes are required then? Introduction to Microcontrollers Mike Silva.

Regards, Evgenii Prun, Moscow, Russia. On Friday 11 December