This demo (gpioDemo directory) shows how to use the GPIO and its interrupt function. LED(s) on the development board blink for about 5 seconds and then the application goes into interrupt mode. Toggle system_gpio_0[0] to let the GPIO go into the interrupt routine.

For more detail of the driver, refer to GPIO Driver.

Newlib

By default, newlib-nano is used for this demo.

See also: User Debug Configuration - To learn more about User Debug Configuration.

Execution Sequence:

The following shows the expected execution sequence:

***Starting GPIO Demo*** 
Configure GPIOs to blink .. 
***Starting GPIO Interrupt Demo*** 
Press and release onboard button sw4 .. 
Entering gpio interrupt routine .. 
Count:1 .. Done 
Entering gpio interrupt routine .. 
Count:2 .. Done 