基于 8051 的饮料售货机系统 - 使用 LCD1602 实现加减功能

#include<reg51.h> #include<stdio.h>

sbit JDQ=P2^0; sbit BEEP=P2^1; sbit lcd_en=P2^5; sbit rs=P2^7; sbit rw = P2^6;

/define******/ #define WAIT_SALE 0 //定义1602显示状态 #define NO_beverage 1 #define INPUT_MONEY 2 #define SALING 3 #define CHANGE 4 #define CANCLE 5 #define NO_DATA 0 #define CLASS 6 #define ADD 1 // 定义加1按键 #define MINUS 5 // 定义减1按键 #define water_change(y, l) ((y) & (~(0x01 << l))) //宏 控制水种类的切换 #define uint unsigned int #define uchar unsigned char

unsigned char water_total[] = {12, 12, 12, 12, 12, 12, 12, 12}; unsigned char water_class[] = {1,2,3 }; unsigned char water_price[] = {1, 2, 3, 4, 5, 6, 7, 8 };

//uchar code wait_sale[]="for sale"; //定义所显示的内容 uchar code wait_sale[]='Welcome to'; uchar code no_beverage[] = 'no beverage'; uchar code price[] = 'Money:'; uchar code number[] = 'Num:'; uchar code class[] = 'Type:'; uchar code sum[] = 'SUM:'; uchar code input[] = 'INPUT:'; uchar code change[] = 'change:'; uchar code put_water[] = 'put water...'; uchar code cancle[] = 'cancle...';

unsigned char e=0x00;

void main() { unsigned char ok = 0, water_type = -1, water_is_choose = 0, uit_sit = 0; unsigned char add=0, minus=0; char water_count = 0; unsigned int flag = 0, money = 0, need_money;

lcd_1602_init(); // LCD初始化

again: ok = 0; water_type = -1; water_count = 0; water_is_choose = -1; uit_sit = 0; flag = 0; money = 0; need_money = 0;

lcd1602_info_display(WAIT_SALE, 0, 0); // LCD显示

while(!ok) //choose the water and count
{
    flag=key();
    if(flag) 
    {
        switch(e) //不同的按键进行不同的操作
        {
            case(0x00):
                water_type++; // 类型变量+1
                water_is_choose = 1;
                if(water_type == 8) // 如果类型变量等于8
                {
                    water_type = 0; // 类型变量变为0
                }
                P3 = water_change(0xff, water_type); // 显示价格指示
                break;
            case(0x04):
                water_type--;
                water_is_choose = 1;
                if(water_type == -1 || water_type == -2) {
                    water_type = 7;
                }
                P3 = water_change(0xff, water_type);// 显示价格指示
                break;
            case(0x08):
                if(water_is_choose == 1) {
                    water_count++;
                    if(water_count > water_total[water_type]) {
                        water_count = water_total[water_type];
                    }
                }
                break;
            case(0x0c):
                if(water_is_choose == 1) {
                    water_count--;
                    if(water_count < 0) {
                        water_count = 0;
                    }
                }
                break;
            case(ADD): // 加1
                add++;
                if(add > 3) { // 超过3则归0
                    add = 0;
                }
                lcd1602_info_display(INPUT_MONEY, add, 0);
                break;
            case(MINUS): // 减1
                minus++;
                if(minus > 3) { // 超过3则归0
                    minus = 0;
                }
                lcd1602_info_display(INPUT_MONEY, minus, 0);
                break;
            case(0x0b): // 返回
                goto again;
                break;
            case(0x0f): // 确认
                if(water_is_choose == 1) {
                    ok=1;
                }
                break;
            default:
                break;
        }
    }
}

}