Hello Dear ,
I used the first link to use overo GPIOs on the E100 to communicate with the
SPARTN3AN FPGA.
I'm doing the following:
1- I chose an empty GPIO input to the FPGA (for example overo_gpio22).
2- I modified the FPGA image so that debug_led1 = over_gpio220
3- I'll set and clear overo GPIO using the bash shell as I read in the first
link that u recommended.
The problem:
Although the following gpios are free on the FPGA. There are other gpios
valid on the overo. Srictly speaking
The free GPIOs on the overo
$ root@usrp-e1xx:/sys/class/gpio# ls
exportgpio16 gpio168 gpiochip128 gpiochip192 gpiochip64 unexport
gpio15gpio164 gpiochip0 gpiochip160 gpiochip32 gpiochip96
The free gpios at the FPGA found at u1e.v
input overo_gpio0, input overo_gpio14, input overo_gpio21, input overo_gpio22,
// Misc GPIO
input overo_gpio23, input overo_gpio64, input overo_gpio127, // Misc GPIO
input overo_gpio176, input overo_gpio163, input overo_gpio170, // Misc GPIO
Is that normal of I did something wrong at the kernel at the overo?
Regards,
S. Yassin
HW Engineer
DLECS
________________________________
From: Philip Balister <phi...@balister.org>
To: Sameh Yassin <sameh_yassi...@yahoo.com>
Cc: "discuss-gnuradio@gnu.org" <discuss-gnuradio@gnu.org>
Sent: Saturday, April 28, 2012 2:18 PM
Subject: Re: [Discuss-gnuradio] E100 - Interface between OMAP3 and FPGA
On 04/28/2012 08:07 AM, Sameh Yassin wrote:
> Dear all,
>
> I need to send data from the OMAP3 to the Spartan3an FPGA. As I understand
> ,from the wiki and presentations, there are two ways to communicate namely;
> using setting_reg and GPIO. The second way seems easier so I'll try it
> first.
>
> I intend to set or clear the free GPIOS on the Spartan FPGA such as
> over_gpio_22. I added the following code to the example tx_waveforms.cpp.
>
> static struct gpio gpio_test = { 22, GPIOF_OUT_INIT_LOW,
>"OVERO_GPIO_22" };
> gpio_set_value(22,1);
> //set gpio22 which is connected to pin IO_L30N_0
>
>
> I tried to compile then I got the error that can't find GPIO.h.
>
> My question: did I use the correct high level function or I used a "lower
> level" that is used to implement the function?
This is the easiest way to toggle gpio's from userspace.
http://wiki.gumstix.org/index.php?title=GPIO#Accessing_GPIO.27s_from_userland
Also:
http://elinux.org/GPIO
The kernel on the e100 already supports the sysfs entries for gpio's.
(UHD uses it)
Philip
>
>
>
> Regards,
> S. Yassin
>
>
>
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> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
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