Raspberry PI GPIO pin execution error

[Rohit]

I was doing a basic LED on off operation on raspberry pi using GPIO pins

i reffered to the following article on EG,

http://www.engineersgarage.com/embedded/raspberry-pi/how-to-blink-led-using-raspberry-pi

compilation is successful

but whenever i execute the binary file by using the command : ./led2 

(led2 is the filename)

following error is displayed on the terminal

bcm2835_init: Unable to open /dev/mem: Permission denied

Please Help me further.

[Prabakaran P M]

Hi Rohit

This Problem is due to the permission error. Check these key points

Make sure that u placed the /home/pi folder.

You can directly download the zip file to the /home/pi folder using "wget" followed by the link to download the zip file and follow by the commands in the tutorial.

You can try "sudo./blink"

[Author]

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