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This is what the sample does

1. Obtain gpio to use from commandline.

2. GPIO_AllocSpace() is called to map GPIO-registers.

3. GPIO_Get_Pin(..) gets the current pin-state (i.e. low (0V)).

4. GPIO_Init_Pin(..) configured the pin to be an output and toggles the pin-state (i.e. high(3.3V)).

5. Wait 3 seconds.

6. GPIO_Set_Pin(..) sets the pin-state to its original value (i.e. low(0V)).

7. GPIO_FreeSpace() will release ressources allocated with GPIO_AllocSpace().

Download

Embedded Visual C++ Workspace for above example:

• gpio.zip

Application to set/get GPIO-level:

• gpio_20131030.zip

Usage:
   gpio <gpio-number>                      Read GPIO-pin.
   gpio <gpio-number> <level>              Set GPIO-pin. You might need to configure a pin as 
                                           output with the below line first.
   gpio <gpio-number> <IsOutput> <level>   Configure pin as input or output. 

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