ZigBee explain in simple terms lesson 2 hardware related and IO operation

1. To master zigbee Basic operating circuit
2.zigbee Wireless module on TI CC2530 What is the difference between the basic operating circuit .
One more reset chip , from CC2530 The chip directly leads to the download related 5 Heel line , by CC2530 Download program , Five wires are ： Power Supply 、 Ground wire 、P2_1 35、P2_2 34、RESET_N 20.
3. Learn to control the input and output of all ports as you encounter them
CC2530 Scope of work ：2-3.6V（ recommend 3.3V）
One has 21 General purpose IO mouth , Respectively ：P0_0 To P0_7(8 individual )、P1_0 To P1_7(8 individual )、P2_0 To P2_4（5 individual ）, These slots can be used as common or corresponding on-chip peripherals . among P1_0 P1_1 Yes 20mA Output drive capability , The rest is 4mA.

How to configure the output ：
Need make P1_0 In ordinary IO Mouth mode , Non on chip peripheral mode , be P1SEL Of the 0 Position as 0.
Manage all IO The mouth is in the ordinary IO Mode or on-chip peripherals by P0SEL、P1SEL、P2SEL decision .PxSEL register （x=0、1） Corresponding one IO, Decided it was normal IO Mouth or on-chip peripherals ,0 It means ordinary IO mouth ,1 Indicates on-chip peripherals . The default interface is 0, So sometimes as an ordinary IO Sometimes I don't write when I speak .

Give Way P1_0 In output state , Non input status . find P1DIR The first 0 position , Make it equal to 1, namely P1_0=1
Manage all IO Whether the port is in the input state or the output state is determined by P0DIR P1DIR P2DIR decision .PxDIR register （x=0、1） Each bit corresponds to a specific IO The corresponding one in the group IO, Decide whether to input or output ,0 Indicates input ,1 Indicative output . The default interface is 0.

Give Way P1_0 In the up and down mode , Non tristate state . find P1INP The first 0 position , Make it equal to 0, namely P1_0=0
Manage all IO Whether the mouth is in the up-down state or the three state state state is determined by P0INP、P1INP、P2INP decision .PxINP register （x=0、1） In the case of input please , Each bit corresponds to a specific IO The corresponding one in the group IO, Decide whether it is a pull-down mode or a three state mode ,0 It means up and down ,1 Represents three states .P2INP The register function is the same , Particular attention ： Behind them 3 Bit determines when the configuration is in up / down mode , Group is pull-up , Or pull down ,0 It means pull up ,1 Represents a drop-down . The default interface is 0.
P2INP Register bit      7     6     5     4     3     2     1     0
Px Group corresponding to IO Position of mouth P2 Group  P1 Group  P0 Group  P2_4  P2_3  P2_2  P2_1  P2_0

Give Way P0_6 In ordinary IO mouth , Off chip peripherals , be P0SEL Of the 6 Position as 0 
Give Way P0_6 In input state , Non output state , be P0DIR Of the 6 Position as 0
Give Way P0_6 In the pull-up position 、 Pull down or one of the three states ,

#include<iocc2530.h>
void main()
{
P0SEL&=0xEF;//1110 1111 Ordinary IO mouth
P0DIR|=0x10;//0001 0000 Output status
P0_4=1;//P0_4 Output high level

P0SEL&=0xBF;//1011 1111 Ordinary IO mouth
P0DIR&=0xBF;//1011 1111 Input status
P0INP&=0xBF;//1011 1111 Give Way P0_6 In the up and down mode
P2INP&=0xDF;// 1101 1111 Give Way P0 The group is in pull-up mode

while(1);// Dead cycle

 if(1==P0_6)
 {// detected P0_6 High level
 P0_4=0;
 }
 else
 {// detected P0_6 Low level
 P0_4=1;
 }
}