1602 AVR单片机版 报警指示功能

功能说明:正常状态下，8个LED不停闪烁，1602显示normal indication指示

报警状态下, 8个LED全发亮不闪烁，1602显示alarm报警，只有按复位按钮才能解除报警.

alarm状态时，由于PB口的低3位和，1602时能，读写，数据指令寄存器选择位复用，所以有点暗.

#include

#include

#define uchar unsigned char

#define uint unsigned int

#define RS1 PORTB_Bit0=1 //数据指令寄存器选择

#define RS0 PORTB_Bit0=0

#define RW1 PORTB_Bit1=1 //读写选择

#define RW0 PORTB_Bit1=0

#define EN1 PORTB_Bit2=1 //读写时能

#define EN0 PORTB_Bit2=0

#define DATAPORT PORTA //1602数据口

#define busy 0x80 //繁忙标志

#include "ku.h" //调用函数库

//-------------------------------------------

uchar alarm[]={"alarm "}; //报警字符串

uchar normal[]={"normal"}; //正常字符串

uchar indication[]={"indication"};

//-------------------------函数声明--------------

void delay_1ms(); //延时1毫秒

void delay_nms(uint n); //延时n毫秒

void wait(); //繁忙等待函数

void writedata(uchar w); //写数据

void writecmd(uchar cmd); //写指令

void init(); //1602初始化

void display(uchar x,uchar y,uchar *P); //显示字符串函数

void delay(uint k) //常用延迟函数

{

uint i,j;

for(i=0;i

for(j=0;j<1140;j++);

}

void main()

{

DDRB=0xff; //设置PB口为输出

PORTB=0xff;

DDRD=0x00; //中断源设置为输入

PORTD=0xff;

MCUCR=0x02; //中断为下降沿

GICR=0xc0; //中断为int0,int1

SREG=0x80; //中断总开关

init();

while(1)

{

PORTB=0xff;

delay(300);

PORTB=0x00;

delay(300);

display(5,0,normal);

display(3,1,indication);

}

}

#pragma vector = 0x04

__interrupt void qq() //中断产生报警

{

writecmd(0x01); //清屏

while(1)

{

display(6,0,alarm);

PORTB=0x00;

}

}

//-----------------------库函数------------------------

void wait()

{

uchar val;

DATAPORT=0xff;

RS0;

RW1;

__no_operation();

EN1;

__no_operation(); //注:一个__no_operation();延时130ns;

__no_operation();

DDRA=0x00;

val=PINA;

while(val&busy)val=PINA;

EN0;

DDRA=0xff;

}

void writecmd(uchar w)

{

wait();

RS0;

RW0;

__no_operation();

DATAPORT=w;

__no_operation();

EN1;

__no_operation();

__no_operation();

EN0;

}

void writedata(uchar data)

{

wait();

RS1;

RW0;

__no_operation();

DATAPORT=data;

__no_operation();

EN1;

__no_operation();

__no_operation();

EN0;

}

void delay_nms(uint k)

{

uint i,j;

for(i=0;i

for(j=0;j<1140;j++);

}

void init()

{

delay_nms(15);

writecmd(0x38);

delay_nms(5);

writecmd(0x38);

delay_nms(5);

writecmd(0x38);

writecmd(0x80);

writecmd(0x01);

writecmd(0x06);

writecmd(0x0c);

}

void display(uchar x,uchar y,uchar *p)

{

uchar add=0x80; //1602数据指针初值

y=y&0x01;

x=x&0x0f;

if(y)add=add+0x40; //显示第二行加数据指针加0x40

writecmd(add+x);

while(*p!=)

{

writedata(*p++);

}

}