使用的是ATMEGA16芯片
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 <iom16.h>
#include <intrinsics.h>
#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<k;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<k;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!='\0')
{
writedata(*p++);
}
}