main.c

单片机c语言程序设计100例--基于PIC+PROTEUS

//-----------------------------------------------------------------
//  名称: K1~K5控制两位数码管的开关、加减与清0操作
//-----------------------------------------------------------------
//  说明: 按下K1时, 数码管显示
//        按下K2时, 数码管黑屏
//        按下K3时, 显示值递增
//        按下K4时, 显示值递减
//        按下K5时, 数码管显示00   
// 
//-----------------------------------------------------------------
#include <pic.h> 
#define INT8U  unsigned char
#define _XTAL_FREQ 1000000UL
//按键定义
#define K1_DOWN() RB0 == 0
#define K2_DOWN() RB1 == 0
#define K3_DOWN() RB2 == 0
#define K4_DOWN() RB3 == 0
#define K5_DOWN() RB4 == 0
INT8U count = 0;                    //显示初值为0(00)
//数字0~9的共阴数码管段码表
const INT8U SEG_CODE[] = 
{ 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F };
//-----------------------------------------------------------------
// 数码管显示
//-----------------------------------------------------------------
void display()
{




}

//-----------------------------------------------------------------
// 主程序
//-----------------------------------------------------------------
void main()
{
   INT8U Recent_Key = 0xFF;       //最近按键   
   INT8U show_on = 1;             //是否显示
   TRISC = 0x00; TRISD = 0x00;    //PC,PD端口设为输出
   PORTC = 0xFF; PORTD = 0xFF;    //初始时全部设为0xFF   
   TRISB = 0xFF;                  //PB端口按键输入
   RBPU  = 0;                     //PB端口内部弱上拉     
   while (1)
   {






   }
}