通过前面对串口通信原理的了解，就可以开始看程序啦。
一、变量定义
#include<STC15F2K60S2.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
/*---------宏定义---------*/
#define cstFocs 11059200L //晶振频率
#define cstBaud1 9600 //波特率
#define cstKeyMaxNum 100 //按键抖动次数
/*---------引脚别名定义---------*/
sbit sbtKey1 = P3 ^ 2 ; //启动发送
sbit sbtKey2 = P3 ^ 3 ; //数字减少
sbit sbtKey3 = P1 ^ 7 ; //数字增加
sbit sbtLedSel = P2 ^ 3;
/*---------变量定义---------*/
uchar ucT100usTimes;
uint uiKey1Cnt; //按键1计数
uint uiKey2Cnt; //按键2计数
uint uiKey3Cnt; //按键3计数
uint uiKeyAllCnt; //按键总的抖动次数
bit btT1msFlag; //1ms的标志
bit btKey1Current;/*key1当前的状态*/
bit btKey1Past; /*key1前一个状态*/
bit btKey2Current;/*key2当前的状态*/
bit btKey2Past; /*key2前一个状态*/
bit btKey3Current;/*key3当前的状态*/
bit btKey3Past; /*key3前一个状态*/
/*收发显示数据相关*/
bit btUart1SendBusy = 0 ;
uchar ucDateTmp; //传输数据暂存
uchar ucDateDigState;
uchar arrSegSelect[] = {
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71}; //显示0-f
二、初始化函数
void Init()
{
P3M0 = 0x00;
P3M1 = 0x00;
P2M0 = 0xff;
P2M1 = 0x00;
P0M0 = 0xff;
P0M1 = 0x00;
TMOD = 0x01; //定时器0，方式1
ET0 = 1; //开启定时器中断
TH0 = ( 65535 - 1000 ) / 256;
TL0 = ( 65535 - 1000 ) % 256;
TR0 = 1; //启动定时器
Uart1_Init(); //外部中断：低优先级
ucDateTmp = 0x00;
sbtLedSel = 0;
btT1msFlag = 0;
/*初始化所有按键的当前状态、前一个状态*/
btKey1Current = 1; /*key1当前的状态*/
btKey1Past = 1; /*key1前一个状态*/
btKey2Current = 1; /*key2当前的状态*/
btKey2Past = 1; /*key2前一个状态*/
btKey3Current = 1; /*key3当前的状态*/
btKey3Past = 1; /*key3前一个状态*/
uiKey1Cnt = 0x80 + cstKeyMaxNum / 3 * 2; //加上0x80防止uiKey1Cnt为负数
uiKey2Cnt = 0x80 + cstKeyMaxNum / 3 * 2;
uiKey3Cnt = 0x80 + cstKeyMaxNum / 3 * 2;
uiKeyAllCnt = cstKeyMaxNum;
}
三、中断函数
void T0_Process() interrupt 1
{
TH0 = ( 65535 - 100 ) / 256; //定时器初始值
TL0 = ( 65535 - 100 ) % 256;
ucT100usTimes++;
if( ucT100usTimes == 10 ) //中断10次对应1ms
{
ucT100usTimes = 0;
btT1msFlag = 1;
}
ucDateDigState++;
if( ucDateDigState == 2 )
ucDateDigState = 0;
P0 = 0;
switch( ucDateDigState )
{
case 0:
P2 = 0x00; P0 = arrSegSelect[ucDateTmp / 16];
break;
case 1:
P2 = 0x01; P0 = arrSegSelect[ucDateTmp % 16]; break;
}
}
四、串口相关函数
/*---------串口1初始化函数--------*/
void Uart1_Init( void )
{
AUXR = 0X80; //辅助寄存器 此时定时器0的速度是传统的12倍，不分频
SCON |= 0X50; //允许接收
TL1 = ( 65536 - ( cstFocs / 4 / cstBaud1 ) );
TH1 = ( 65536 - ( cstFocs / 4 / cstBaud1 ) ) >> 8;
AUXR |= 0X40; //辅助寄存器 此时定时器1的速度是传统的12倍，不分频
RI = 0; //接收中断标志位
TI = 0; //发送中断标志位
TR1 = 1; //启动定时器1
ES = 1; //串口中断允许位
EA = 1; //总中断允许位
PS = 1 ; //串口1中断高优先级
}
/*---------发送数据函数--------*/
void SendData( unsigned char dat )
{
while( btUart1SendBusy ); //发送单个字符给UART1以发送到PC机
btUart1SendBusy = 1;
SBUF = dat;
}
/*---------串口1中断处理函数--------*/
void Uart1_Process() interrupt 4 using 1
{
if( RI ) //接受完数据后 RI自动置1
{
RI = 0; ucDateTmp = SBUF;
}
if( TI ) //发送完数据后 RI自动置1
{
TI = 0; btUart1SendBusy = 0;
}
}
五、主函数
void main()
{
Init();
while( 1 )
{
if( btT1msFlag )
{
btT1msFlag = 0;
if( sbtKey1 == 0 )
uiKey1Cnt--;
if( sbtKey2 == 0 )
uiKey2Cnt--;
if( sbtKey3 == 0 ) //按键是按下状态
uiKey3Cnt--;
uiKeyAllCnt--;//总的次数减1
if( uiKeyAllCnt == 0 ) //100次完了
{
if( uiKey1Cnt < 0x80 )
{
btKey1Current = 0;
if( btKey1Past == 1 ) //下降沿（按键做动作）
{
btKey1Past = 0;
SendData( ucDateTmp ) ;
}
}
if( uiKey1Cnt >= 0x80 )
{
btKey1Current = 1;
if( btKey1Past == 0 )
btKey1Past = 1; //上升沿（假设不做动作那就继续）
}
if( uiKey2Cnt < 0x80 )
{
btKey2Current = 0;
if( btKey2Past == 1 ) //下降沿（按键做动作）
{
btKey2Past = 0;
ucDateTmp--;
}
}
if( uiKey2Cnt >= 0x80 )
{
btKey2Current = 1;
if( btKey2Past == 0 )
btKey2Past = 1; //上升沿（假设不做动作那就继续）
}
if( uiKey3Cnt < 0x80 )
{
btKey3Current = 0;
if( btKey3Past == 1 ) //下降沿（按键做动作）
{
btKey3Past = 0;
ucDateTmp++;
}
}
if( uiKey3Cnt >= 0x80 )
{
btKey3Current = 1;
if( btKey3Past == 0 )
btKey3Past = 1; //上升沿（假设不做动作那就继续）
}
/*新一轮的判断*/
uiKey1Cnt = 0x80 + cstKeyMaxNum / 3 * 2;
uiKey2Cnt = 0x80 + cstKeyMaxNum / 3 * 2;
uiKey3Cnt = 0x80 + cstKeyMaxNum / 3 * 2;
uiKeyAllCnt = cstKeyMaxNum;
}
}