單片機簡單程序試試發(fā)

ID:276209 · 發(fā)表于 2018-1-15 15:24

#include <avr/io.h>
#include <util/delay.h>

//口定義
#define PORT_DHT PORTC
//口方向定義
#define DDR_DHT DDRC
//讀取口定義
#define PIN_DHT PINC
//數(shù)據(jù)位定義
#define BIT_DHT PC4

#define RS PA0 //數(shù)據(jù)/命令控制端 0命令，1 數(shù)據(jù)

#define RW PA1 //讀/寫選擇控制端 0寫，1讀

#define E PA2 //使能端下降沿讀，高電平寫

#define L_DHT PORT_DHT&=~(1<<BIT_DHT) //數(shù)據(jù)線強制拉低

#define H_DHT PORT_DHT|=(1<<BIT_DHT) //數(shù)據(jù)線強制拉高

#define O_DHT DDR_DHT|=(1<<BIT_DHT) //Mega16控制總線,PD4為輸出

#define P_DHT DDR_DHT&=~(1<<BIT_DHT)         //釋放總線,PD4為輸入

#define I_DHT PIN_DHT&(1<<BIT_DHT) //數(shù)據(jù)線的狀態(tài)

void LCDPort_Init(void); //液晶端口初始化
void LCD_Init(void); //LCD 初始化
void Write_Com(unsigned char LCD_Com); //LCD 寫指令
void Write_Data_Byte(unsigned char LCD_Data); //LCD 寫字節(jié)數(shù)據(jù)
void Write_Place_xy(unsigned char x,unsigned char y); //指定當前寫字符的位置
void Write_Data_String(unsigned char x,unsigned char y,unsigned char *data);//在指定的（x，y）位置上寫入字符串數(shù)據(jù)
void Write_Data_Char(unsigned char x,unsigned char y,unsigned char data);//在指定的（x，y）位置上寫入字符數(shù)據(jù)
void Check_Busy(void); //讀寫檢測函數(shù)，每次對液晶操讀作前都要進行寫檢測
void Delayus(unsigned int lus); //us延時函數(shù)
void Delayms(unsigned int lms); //ms延時函數(shù)
/*******************************************************/
unsigned  Reset()
{
O_DHT;
H_DHT;
_delay_us(2);
L_DHT;
_delay_us(19);
P_DHT;
_delay_us(20);
if(I_DHT)
return 0;
else
return 1;
}
int main(void)
{
_delay_ms(1000);
unsigned char tdata[5];
unsigned long u16Flag; // 超時計數(shù)
unsigned char iiii;
unsigned long u32I; // 接收數(shù)據(jù)臨時變量
unsigned long ReceiveValue = 0; // 接收數(shù)據(jù)包變量
unsigned long ReceiveValue1 = 0; // 接收校驗和變量
unsigned int ReceiveHighByte; // 分解數(shù)據(jù)包濕度
unsigned int ReceiveLowByte; // 分解數(shù)據(jù)包溫度
LCDPort_Init();
LCD_Init();
Write_Data_String(0,0,"ddddddd");
while(1)
if(Reset())
{ P_DHT;
while((!(I_DHT)) && ((u16Flag++)<50000));
ReceiveValue = 0;
ReceiveValue1 = 0;
u16Flag = 0;
while((I_DHT) && ((u16Flag++)<50000));
for(u32I=0x80000000; u32I>0; u32I>>=1)
{
u16Flag = 0;
while((!(I_DHT))&& ((u16Flag++)<3000));
u16Flag = 0;
_delay_us(28);
if(I_DHT)
{
ReceiveValue |= u32I;
}
while((I_DHT)&&((u16Flag++)<300));
}
for(u32I=0x80;u32I>0;u32I>>=1)
{
u16Flag = 0;
while((!(I_DHT))&&((u16Flag++)<3000));
u16Flag = 0;
_delay_us(28);
if(I_DHT)
{
ReceiveValue1 |= u32I;
}
while((I_DHT)&&((u16Flag++)<300));
}
while(!(I_DHT));
O_DHT;
H_DHT;
ReceiveLowByte =(unsigned int )( ReceiveValue&0x0000FFFF);
ReceiveHighByte = ReceiveValue>>16;
/****************************display******************************/
tdata[0]=*((unsigned char*)(&ReceiveHighByte) + 1)/10;
      tdata[1]=*((unsigned char*)(&ReceiveHighByte) + 1)%10;
      tdata[2]=*((unsigned char*)(&ReceiveLowByte) + 1)/10;
tdata[3]=*((unsigned char*)(&ReceiveLowByte) + 1)%10;
Write_Com(0xc0);
         Write_Data_Byte( tdata[0]+0x30 );//顯示濕度十位
Write_Com(0xc1);
Write_Data_Byte( tdata[1]+0x30 );//顯示濕度個位
Write_Com(0xc2);
// Write_Data_Byte("%");
Write_Com(0xc4);
Write_Data_Byte( tdata[2]+0x30 );//顯示溫度十位
Write_Com(0xc5);
Write_Data_Byte( tdata[3]+0x30 );//顯示溫度個位
Write_Com(0xc6);
      Write_Data_Byte(0xdf);//顯示"。"
      Write_Com(0xc7);
      Write_Data_Byte('C');

}
else
{

}

}

void LCDPort_Init()
{
  //LCD 數(shù)據(jù)端口設置
  PORTD = 0X00; //
  DDRD = 0XFF; //配置端口PD全部為輸出口,LCD 數(shù)據(jù)端口
  //LCD 控制端口設置
  PORTA &= ~((1 << RS) | (1 << RW) | (1 << E)); //
  DDRA |= (1 << RS) | (1 << RW) | (1 << E);
}

//LCD 初始化
void LCD_Init()
{
Write_Com(0X01); //清屏
Delayms(5);
Write_Com(0X38); //顯示模式設置 16x2顯示，5x7點陣，8 位數(shù)據(jù)接口
Delayms(5);
//Write_Com(0X0f); //顯示開關控制，開顯示，光標顯示，光標閃爍
Write_Com(0X0c); //顯示開關控制，開顯示，光標不顯示，光標不閃爍
Delayms(5);
Write_Com(0X06); //光標設置，讀或寫一個字符后，地址指針加一，光標加一，整屏不移動
Delayms(5);
}

//LCD 寫指令
void Write_Com(unsigned char LCD_Com)
{
Check_Busy();
PORTA &= ~(1 << RS); //RS=0，寫命令
PORTA &= ~(1 << RW); //RW=0，寫指令
PORTA |= (1 << E); //E=1，寫操作
Delayms(1);
PORTD = LCD_Com; //指令送數(shù)據(jù)端口
PORTA &= ~(1 << E); //E=0，停止寫操作
Delayms(1);
}

//LCD 寫字節(jié)數(shù)據(jù)
void Write_Data_Byte(unsigned char LCD_Data)
{
  Check_Busy();
  PORTA |= (1 << RS); //RS=1，寫數(shù)據(jù)
  PORTA &= ~(1 << RW); //RW=0，寫指令
  PORTA |= (1 << E); //E=1，寫操作
  Delayms(1);
  PORTD = LCD_Data; // 數(shù)據(jù)送數(shù)據(jù)端口
  PORTA &= ~(1 << E); //E=0，停止寫操作
  Delayms(1);
}

//指定當前寫字符的位置
void Write_Place_xy(unsigned char x,unsigned char y)
{
  unsigned char address;
  if(y == 0) //行位置
{
address = 0x80 + x; //列位置,
}
  else
{
address = 0x80 + 0x40 + x; //
   }
  Write_Com(address); //寫地址
}

//在指定的（x，y）位置上寫入字符串數(shù)據(jù)
void Write_Data_String(unsigned char x,unsigned char y,unsigned char *data)
{
  Write_Place_xy(x,y); //寫地址
  while(*data)
  {
Write_Data_Byte(*data); //寫字符串
data++; //指針地址加1
}
}

//在指定的（x，y）位置上寫入字符數(shù)據(jù) x列位置,y行位置
void Write_Data_Char(unsigned char x,unsigned char y,unsigned char data)
{
  Write_Place_xy(x,y); //
  Write_Data_Byte(data); //
}

//讀寫檢測函數(shù)，每次對液晶操作前都要進行讀寫檢測
void Check_Busy()
{
  DDRD = 0X00; //PB口置為輸入口，準備讀取數(shù)據(jù)
  PORTA &= ~(1 << RS); //RS=0，讀命令
  PORTA |= (1 << RW); //RW=1，讀指令
  PORTA |= (1 << E); //E=1，使能
  while(0X80 & PIND); //監(jiān)測忙信號，直到忙信號為0，才能進行讀寫操作
  PORTA &= ~(1 << E); //E=0
  DDRD = 0XFF; //PB口置為輸出口，準備向端口發(fā)送數(shù)據(jù)
}

//us級別的延時函數(shù)
void Delayus(unsigned int lus)
{
while(lus--)
  {
_delay_loop_2(4); //_delay_loop_2(1)是延時4 個時鐘周期，參數(shù)為4 則延時16
//個時鐘周期，本實驗用16M晶體，則16 個時鐘周期為16/16=1us
  }
}

//ms級別的延時函數(shù)
void Delayms(unsigned int lms)
{
  while(lms--)
  {
Delayus(1000); //延時1ms
}
}

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單片機簡單程序試試發(fā)