这是程序
- #include
- #include "1602.c"
- #define uchar unsigned char
- #define uint unsigned int
- #define HIGH P2OUT|=BIT1;
- #define LOW P2OUT&=~BIT1;
- char temph,templ,humdh,humdl,check,cal;
- uchar shuzu[]={0,1,2,3,4,5,6};
- void delay_1ms(uint z)
- {
- uint i,j;
- for(i=z;i>0;i--)
- for(j=80;j>0;j--);
- }
- void DelayNus(uint n)//延时1US函数
- {
-
- TACTL|= TASSEL_2+TACLR+ID_3;//定时器A，时钟为SCLK，8分频；
- TACTL |= MC_1; //增计数到CCR0
- TACCR0 = n;
- while((TACTL & BIT0)!=0x01); //等待
- TACTL &= ~MC_1; //停止计数
- TACTL &= ~BIT0; //清除中断标志
- }
- void init_clk()
- {
- int i;
- WDTCTL=WDTPW+WDTHOLD;
- BCSCTL1&=~XT2OFF;
- do
- {
- IFG1 &=~OFIFG;
- for(i=0xff;i>0;i--);
- }
- while(IFG1&OFIFG);
- BCSCTL2|= SELM_2+SELS;//SCLK，MCLK都选择为外部时钟
- }
- char receive(void) //接受函数
- {
- char temp,cnt=0; //临时变量用于存储接受数据
- while(cnt<8)
- {
- while((P2IN&BIT1)==0); //等待50us的低电平结束
- DelayNus(35);
- if(P2IN&BIT1) //长于30us定义为1
- {
- temp++;
- temp<<=1;
- while(P2IN&BIT1); //结束高电平，即下一位数据的到来
- }
- else
- {
- temp<<=1;
- }
- if(cnt!=7)
- while(!(P2IN&BIT1)); //最后一次给函数返回留下时间
- cnt++;
- }
- return temp;
- }
- void work_data(void)
- {
- P2DIR |= BIT1; //设置P2.1为输出状态
- HIGH;
- _NOP();_NOP();_NOP();
- LOW;
- DelayNus(18000); //开始信号
- HIGH;
- DelayNus(30);
- P2DIR&=~BIT1; //设置P2.1为输入状态,检测传感器响应
- DelayNus(20); //20US后 P2IN 是否为低电平，不为低电平 说明复位失败，重新开始
- while((P2IN&BIT1)!=0)//如果没有检测到响应信号 继续发送开始信号
- {
- P2DIR |= BIT1; //设置P2.1为输出状态
- HIGH;
- _NOP();_NOP();_NOP();
- LOW;
- DelayNus(18000); //开始信号
- HIGH;
- DelayNus(30);
- P2DIR&=~BIT1; //设置P2.1为输入状态,检测传感器响应
- DelayNus(20);
- }
- while((P2IN&BIT1)==0);//等待拉高，准备输出数据
- while(P2IN&BIT1); //等待低电平，输出数据
- //下面开始接受数据
- humdh=receive();
- humdl=receive();
- temph=receive();
- templ=receive();
- check=receive();
- cal=humdh+humdl+temph+templ;
- }
- void main()
- {
- char R_shi,R_ge,T_shi,T_ge,T_xs1,T_xs2,R_xs;
- WDTCTL=WDTPW+WDTHOLD;
- P2DIR=0XFF;
- P2OUT=0X00;
- init_clk();
- yejing_init();
- while(1)
- {
- work_data();
- if(check==cal)
- {
- R_shi = 0x30+humdh / 10;
- R_ge = 0x30+humdh % 10;
- R_xs = 0x30+humdl / 10;
- T_shi = 0x30+temph /10;
- T_ge = 0x30+temph % 10;
- T_xs1 = 0x30+templ / 10;
- T_xs2 = 0x30+templ % 10;
-
-
- shuzu[0] = R_shi;
- shuzu[1] = R_ge;
- shuzu[2] = R_xs;
- shuzu[3] = T_shi;
- shuzu[4] = T_ge;
- shuzu[5] = T_xs1;
- shuzu[6] = T_xs2;
-
- LCD_write_char(0,0,shuzu[0]);
- LCD_write_char(1,0,shuzu[1]);
- LCD_write_str(2,0,".");
- LCD_write_char(3,0,shuzu[2]);
-
- LCD_write_char(0,1,shuzu[3]);
- LCD_write_char(1,1,shuzu[4]);
- LCD_write_str(2,1,".");
- LCD_write_char(3,1,shuzu[5]);
- LCD_write_char(4,1,shuzu[6]);
- delay_1ms(3000);//等待下次采样
- }
- }
- }
- /***********************************************
- 1602液晶显示程序，主程序中如下写
- unsigned char dis[]={1,2,3,4,5,6};
- yejing_init( )初始化
- LCD_write_str(0,0,"welloooo");//输出字符串
- LCD_write_char(4,1,48+dis[0]);//输出数组
- IO P4 RS P25 RW P24 EN P23
- ************************************************/
- #include
- #define CPU_F ((double)8000000)
- #define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0)) //延时
- #define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
- #define RS_CLR P2OUT &= ~BIT5 //RS置低
- #define RS_SET P2OUT |= BIT5 //RS置高
- #define RW_CLR P2OUT &= ~BIT4 //RW置低
- #define RW_SET P2OUT |= BIT4 //RW置高
- #define EN_CLR P2OUT &= ~BIT3 //E置低
- #define EN_SET P2OUT |= BIT3 //E置高
- #define DataPort P4OUT //P4口为数据口
- #define uchar unsigned char
- #define uint unsigned int
- #define ulong unsigned long
- /***************************初始化IO口子程序***********************/
- void Port_init()
- {
- P4SEL = 0x00;
- P4DIR = 0xFF; //数据口输出模式
- P2SEL = 0x00;
- P2DIR|= BIT5 + BIT4 + BIT3; //控制口设置为输出模式
- }
- /**************************显示屏命令写入函数***********************/
- void LCD_write_com(unsigned char com)
- {
- RS_CLR;
- RW_CLR;
- EN_SET;
- DataPort = com; //命令写入端口
- delay_ms(5);
- EN_CLR;
- }
- /************************显示屏数据写入函数************/
- void LCD_write_data(unsigned char data)
- {
- RS_SET;
- RW_CLR;
- EN_SET;
- DataPort = data; //数据写入端口
- delay_ms(5);
- EN_CLR;
- }
- /*****************************显示屏清空显示*********************/
- void LCD_clear(void)
- {
- LCD_write_com(0x01); //清屏幕显示
- delay_ms(5);
- }
- /****************************显示屏字符串写入函数************************/
- void LCD_write_str(unsigned char x,unsigned char y,unsigned char *s)
- {
-
- if (y == 0)
- {
- LCD_write_com(0x80 + x); //第一行显示
- }
- else
- {
- LCD_write_com(0xC0 + x); //第二行显示
- }
-
- while (*s)
- {
- LCD_write_data( *s);
- s ++;
- }
- }
- //***********************************************************************
- // 显示屏单字符写入函数
- //***********************************************************************
- void LCD_write_char(unsigned char x,unsigned char y,unsigned char data)
- {
-
- if (y == 0)
- {
- LCD_write_com(0x80 + x); //第一行显示
- }
- else
- {
- LCD_write_com(0xC0 + x); //第二行显示
- }
-
- LCD_write_data( data);
- }
- /*********************系统时钟初始化*********************/
- void Clock_Init()
- {
- uchar i;
- BCSCTL1&=~XT2OFF; //打开XT2振荡器
- BCSCTL2|=SELM1+SELS; //MCLK为8MHZ，SMCLK为8MHZ
- do{
- IFG1&=~OFIFG; //清楚振荡器错误标志
- for(i=0;i<100;i++)
- _NOP();
- }
- while((IFG1&OFIFG)!=0); //如果标志位1，则继续循环等待
- IFG1&=~OFIFG;
- }
- /***************显示屏初始化函数***********************/
- void LCD_init(void)
- {
- LCD_write_com(0x38); //显示模式设置
- delay_ms(5);
- LCD_write_com(0x08); //显示关闭
- delay_ms(5);
- LCD_write_com(0x01); //显示清屏
- delay_ms(5);
- LCD_write_com(0x06); //显示光标移动设置
- delay_ms(5);
- LCD_write_com(0x0C); //显示开及光标设置
- delay_ms(5);
- }
- void yejing_init(void)
- {
- // Clock_Init(); //系统时钟设置
- Port_init(); //系统初始化，设置IO口属性
- delay_ms(100); //延时100ms
- LCD_init(); //液晶参数初始化设置
- LCD_clear(); //清屏
- }
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