I couldn't build the project, is there exist version problem?
=>(1)I can't build project directly
(2)I port main function to my SDK project, it could be built, but signal seems always being pull high
As the readme says, the project is made for SDK 5.1.0, so if you try to compile it with a previous version, you'll most likely have to do some changes, in particular with regard to PIN names.
Due to a couple of PANs (see inline comments in the updated code), you'll also be limited to 4 MHz if you have a first revision chip.
