; PORT: Ports + Intra-group sequence < function assignment >< internal resistance status >< drive capability >< Output level status >
; First angle bracket: function assignment, 0 for input, 1 for output, 2 for IO port, 6 for interrupt, rest indeterminate
; The second angle bracket: built-in resistor, using 0, mark the internal resistance high impedance State, if 1 is the internal resistor pull, 2 represents the internal resistance pull down. The default state is used to indicate a resistor pull-up. Other data is invalid.
; The third angle bracket: drive capability; Default rep drive capability is level 1
The fourth angle bracket: The required level of the output is valid, that is, the power supply circuit, the required level of the foot to enable, 0 is low, 1 is a high level.
The parameter meaning of the Android Gpio port in Sys_comfig
