I don´t understand your question. Can you, please, make yourself clearer?
Do you know unit_test?
Thanks for responding. The i.MX53 for example has GPIO (General Purpose I/O). Does the Ubuntu developement environment provided by FreeScale have drivers, or an API, for the GPIO? In general, you need functions to determine the direction of the I/O (input, output, tri-state), set the I/O, clear the I/O and get the current state of the I/O. Again, does FreeScale provide software to support the GPIO... as well as other peripherlas like CSPI, PWM ... etc.
In order to access GPIO you can follow the kernel GPIO sysfs method that I posted here:
For other peripherals I suggest to take a look at the Linux Reference manual that comes with the BSP documents.
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