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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 07-24-2014, 05:46 PM   #1
PayalG
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Registered: Jul 2014
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Read/Write Gpio using direct access registers


I am writing a device driver for Wireless LAN access point, and have following Gpio mapping in the datasheet:-

Address Name Description
0x18040000 GPIO_OE General Purpose I/O Output Enable
0x18040004 GPIO_IN General Purpose I/O Input Value
0x18040008 GPIO_OUT General Purpose I/O Output Value

I am trying read and write Gpio using this mapping, but I am not able to find how to communicate with Gpio's using registers' addresses.
Help Appreciated.
 
Old 07-24-2014, 06:40 PM   #2
buttugly
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You might try [URL="https://openwrt.org/"] There is a good chance your ap or router is already supported and you can see how it was done.

Kevin
 
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