duo/main.cpp: Add EXTINT module.
duo/main.cpp: Add EXTINT module.

ganshun666/micropython,ganshun666/micropython,ganshun666/micropython,ganshun666/micropython,redbear/micropython,redbear/micropython,redbear/micropython,redbear/micropython,ganshun666/micropython,redbear/micropython