main.cpp

00001 #include "mbed.h"
00002 #define size 14
00003 Serial pc(USBTX,USBRX);
00004 Serial sensor(PA_9,PA_10);
00005 int commend[3] = {0xA5,0x52,0xF7 };
00006 char buf[size];
00007 int Lux,Temp,Preesure,Hum,Height;
00008 void judgement_data(char buf[]){
00009     int i=0;
00010     if(buf[i++]== 0x5A){
00011         //pc.printf("first_step\n");
00012         if(buf[i++]== 0x5A){
00013             //pc.printf("second_step\n");
00014            //i++;//go to data type
00015             if(buf[i] == 0x15){
00016                 pc.printf("Lux type\n");
00017                 i++;//04
00018                 Lux = ((buf[i+1]<<24) | (buf[i+2]<<16) | (buf[i+3]<<8) | buf[i+4])/100;
00019                 //Lux = (0x00<<24) | (0x00<<16) | (0xFE<<8) | 0x40;//test
00020                 pc.printf("Lux = %d\n", Lux);
00021             }else if(buf[i] == 0x45){
00022                 pc.printf("temp type\n");
00023                 i++;//0A
00024                 Temp = ((buf[i+1]<<8)|(buf[i+2]))/100;
00025                 Preesure = ((buf[i+3]<<24)|(buf[i+4]<<16)|(buf[i+5]<<8)|(buf[i+6]))/100;
00026                 Hum = ((buf[i+7]<<8)|(buf[i+8]))/100;
00027                 Height = ((buf[i+9]<<8)|(buf[i+10]));
00028                 pc.printf("Temp = %d\n", Temp);
00029                 pc.printf("Preesure = %d\n", Preesure);
00030                 pc.printf("Hum = %d\n", Hum);
00031                 pc.printf("Height = %d\n", Height);
00032             }
00033         }
00034     }
00035 }
00036 
00037 int main(){
00038     pc.baud(9600);
00039     //pc.printf("testing use serial port\n");
00040     while(1){
00041         for(int i=0;i<3;i++){
00042             pc.putc(commend[i]);
00043             sensor.putc(commend[i]);
00044         }
00045          
00046         for(int i=0;i<size;i++){
00047             buf[i] = sensor.getc();  
00048             pc.putc(buf[i]);
00049         }
00050         pc.printf("\n");//enter
00051         judgement_data(buf);
00052         wait(3);
00053     }
00054 }