CC2530 common registers for port initialization

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Be careful ：PxSEL in ,x Represents a port . Here we use P1 Port as an example .

P1SEL—— port 1 Function register

P1DIR—— port 1 Direction register

P0INP—— port 0 Input configuration register

P1INP—— port 1 Input configuration register

P2INP—— port 2 Input configuration register

P1（Port 1）—— port 1

Storage P1_0 To P1_7 Status information .

 Case study ：
int temp=0;
P1_0=~P1_0;    // take P1_0 State inversion ;