单片机键盘控制数码管显示各种波形增益电路图与程序

#include <reg52.h> //#include<delay.h> #define LCM1602_Data P0 //定义数据io口 sbit LCM1602_rs = P2^4; sbit LCM1602_rw = P2^5; sbit LCM1602_e = P2^6; unsigned char Frist_line[20] ; unsigned char Second_line[20]; unsigned char LCM1602_scan; void delay(unsigned int j) {while(j--) {}; } void write_command(unsigned char command) { LCM1602_Data=command; LCM1602_rw=0; LCM1602_rs=0; LCM1602_e=0; delay(400); //24M 400 12M 200 LCM1602_e=1; } void write_data(unsigned char dat) {LCM1602_Data=dat; LCM1602_rs=1; LCM1602_rw=0; LCM1602_e=0; delay(400); LCM1602_e=1; } void start_1602(void) { /* DDRC=0XFF;//使其为输出方式 DDRD.0=1; DDRD.1=1; //MEGA 的端口设置 DDRD.2=1; // //DDRB.3=1; //PORTB.3=0;*/ /////////////////////////////////////////////////////// write_command(0x01); //清显示 write_command(0x38); //设置16*2显示,5*7点阵,8位数据接口 write_command(0x0c); //0000-1DCB D=1开显示 C=1显示光标 B=1光标闪烁 write_command(0x06); //0000-01NS N=1读写后地址指针加1 S=1写一个字符正屏左移 } void write_bit(unsigned char x,unsigned char y,unsigned char ch) {unsigned char xx; if(y>1) {xx=x+ 0xc0; write_command(xx); write_data(ch); } else {xx=x+ 0x80; write_command(xx); write_data(ch); } } void progess() {//Frist_line[]="voltage:"; Frist_line[0]='v'; Frist_line[1]='o'; Frist_line[2]='l'; Frist_line[3]='t'; Frist_line[4]='a'; Frist_line[5]='g'; Frist_line[6]='e'; Frist_line[8]=':'; //Second_line[]="current:"; Second_line[0]='c'; Second_line[1]='u'; Second_line[2]='r'; Second_line[3]='r'; Second_line[4]='e'; Second_line[5]='n'; Second_line[6] ='t'; Second_line[8]=':'; } void Display_1602(void) {start_1602() ; //想要显示必须要初始化1602 for(LCM1602_scan=0;LCM1602_scan<16;LCM1602_scan++) { write_bit(LCM1602_scan,1, Frist_line[LCM1602_scan]); write_bit(LCM1602_scan,2,Second_line[LCM1602_scan]); } } void main(void) { progess(); while (1) { Display_1602(); delay(1000); }; }