Example: GPIO

This test code shows how to configure gpio and how to use gpio interrupt.

GPIO functions:

• GPIO18: output
• GPIO19: output
• GPIO4: input, pulled up, interrupt from rising edge and falling edge
• GPIO5: input, pulled up, interrupt from rising edge.

Test:

• Connect GPIO18 with GPIO4
• Connect GPIO19 with GPIO5
• Generate pulses on GPIO18/19, that triggers interrupt on GPIO4/5