Using BeagleBone GPIOs above 1Mz

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Hello,

I need to read and write to 6 GPIOs on the BeagleBone at a rate greater than 1MHz. I understand that the Kernel is able to access the GPIOs at any rate up to 100MHz. The following two links have been somewhat helpful, but I they do not seem to work on the BeagleBone.
http://x4350.blogspot.com/2011/01/digital-io-on-beagleboard-using-gpio.html
http://41j.com/blog/2011/09/beagleboard-gpio-input-driverless/

I would really appreciate any help.

Thanks

John

2

At least on the Beagle Board, the multiplexing of the GPIO units limits speed to about one update every 240 ns.
It also seems that the CPU is held in a wait state until the GPIO pin updates.

Jon