CC2530温湿度

 主函数

#include 
#include 
#include "init.h"//UART0
#include 
#define uint unsigned int
#define uchar unsigned char
#define SIZE 40
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])

#define String "Temp  Alarm！\r\n"
#define String1 "Humi  Alarm！\r\n"

//*************************************************************************************************
#define DATA_PIN P0_7
//温湿度定义
uchar ucharFLAG,uchartemp;
uchar shidu,wendu;
uchar ucharT_data_H,ucharT_data_L,ucharRH_data_H,ucharRH_data_L,ucharcheckdata;
uchar ucharT_data_H_temp,ucharT_data_L_temp,ucharRH_data_H_temp,ucharRH_data_L_temp,ucharcheckdata_temp;
uchar ucharcomdata;


//延时函数
void Delay_us() //1 us延时
{
    asm("nop");
    asm("nop");
    asm("nop");
    asm("nop");
    asm("nop");    
    asm("nop");
    asm("nop");
    asm("nop");    
    asm("nop"); 
}

void Delay_10us() //10 us延时
{
  #if 0  
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();
  Delay_us();  
  #else
    int i = 10;
    while(i--);  
#endif  
}

void Delay_ms(uint Time)//n ms延时
{
    unsigned char i;
    while(Time--)
    {
        for(i=0;i<100;i++)
            Delay_10us();
    }
}

//温湿度传感
void COM(void)    // 温湿写入
{     
    char i;      
    for(i=0;i<8;i++)
    {
        ucharFLAG=2;
        while((!DATA_PIN)&&ucharFLAG++);//         0
        Delay_10us();
        Delay_10us();
        Delay_10us();
        uchartemp=0;
        
        if(DATA_PIN)uchartemp=1;//1
        ucharFLAG=2;
        
        while((DATA_PIN)&&ucharFLAG++);
        if(ucharFLAG==1)break;
        
        ucharcomdata<<=1;
        ucharcomdata|=uchartemp;
    }    
}

void DHT11(void)   //温湿传感启动
{
    DATA_PIN=0;//低平 
    Delay_ms(20);  //>18MS AD转换 
    DATA_PIN=1;//高平 后20-40ms的输入输出切换 
    P0DIR &= ~0x80; //重新配置IO口方向 输入P0_7 
    Delay_10us();
    Delay_10us(); 
    Delay_10us();
    Delay_10us();
    if(!DATA_PIN)//如果if中进不去问题一：程序一直进不来，原因可能在延时函数中没有精确      1
    {
        ucharFLAG=2;
        while((!DATA_PIN)&&ucharFLAG++);//        通1 
        ucharFLAG=2;
        while((DATA_PIN)&&ucharFLAG++);//              通1
        COM();//1
        ucharRH_data_H_temp=ucharcomdata;
        COM();//2
        ucharRH_data_L_temp=ucharcomdata;
        COM();//3
        ucharT_data_H_temp=ucharcomdata;
        COM();//4
        ucharT_data_L_temp=ucharcomdata;
        COM();//5
        ucharcheckdata_temp=ucharcomdata;
        DATA_PIN=1;
        uchartemp=(ucharT_data_H_temp+ucharT_data_L_temp+ucharRH_data_H_temp+ucharRH_data_L_temp);//检验
        if(uchartemp==ucharcheckdata_temp)
        {
            ucharRH_data_H=ucharRH_data_H_temp;
            ucharRH_data_L=ucharRH_data_L_temp;
            ucharT_data_H=ucharT_data_H_temp;
            ucharT_data_L=ucharT_data_L_temp;
            ucharcheckdata=ucharcheckdata_temp;
        }
         wendu=ucharT_data_H;
         shidu=ucharRH_data_H;
     }
     else //没用成功读取，返回0
     {
         wendu=21;
         shidu=15;
     }
    P0DIR |= 0x80; //IO口需要重新配置 
}
//1

char strTemp[SIZE];//数组40 5*8 
char str[1] = "%";
void DelayMS(uint msec)//1毫米延时
{ 
 uint i,j; 
 
 for (i=0; i28)
    {
      UartSendString(String,sizeof(String));
    }
    DelayMS(1000);
    memset(strTemp, 0, ARRAY_SIZE(strTemp));
    sprintf(strTemp,"DHT11-Humidity: %02d%c\r\n",(uint)shidu,str[0]);
    UartSendString(strTemp, sizeof(strTemp));
    DelayMS(500);
    if((uint)shidu>24)
    {
      UartSendString(String1,sizeof(String1));
    }
    DelayMS(2000);
  }
}

 init.h

//#include "init.h"
#define uint unsigned int 
#define uchar unsigned char


// 串口初始化函数     
void InitUart()
{
    CLKCONCMD &= ~0x40;      // 设置系统时钟源为 32MHZ晶振
    while(CLKCONSTA & 0x40); // 等待晶振稳定 
    CLKCONCMD &= ~0x47;      // 设置系统主时钟频率为 32MHZ
    
    PERCFG = 0x00;           //位置1 P0口 
    P0SEL = 0x0c;            //P0_2,P0_3,P0_4,P0_5用作串口,第二功能 
    P2DIR &= ~0xC0;          //P0 优先作为UART0 ，优先级
    
    U0CSR |= 0x80;           //UART 方式 
    U0GCR |= 11;             //U0GCR与U0BAUD配合     
    U0BAUD |= 216;           // 波特率设为115200 
    UTX0IF = 0;              //UART0 TX 中断标志初始置位0 
    
}

void UartSendString(char *Data, int len)//串口发送函数
{
    uint i;
    
    for(i=0;i