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Re: [Discuss-gnuradio] E100 - Interface between OMAP3 and FPGA

From: Philip Balister
Subject: Re: [Discuss-gnuradio] E100 - Interface between OMAP3 and FPGA
Date: Sat, 28 Apr 2012 08:18:09 -0400
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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.




The kernel on the e100 already supports the sysfs entries for gpio's.
(UHD uses it)


> Regards,
> S. Yassin
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> Discuss-gnuradio mailing list
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