单片机串口控制16位流水灯仿真及源程序

ID:161768 · 发表于 2017-2-19 01:08

51单片机串口控制16位流水灯的仿真原理图如下：

单片机源程序：

#include "reg51.h"
#include "intrins.h"
#define FOSC 11059200L //System frequency
#define BAUD 9600 //UART baudrate
#define Level_1 10
#define Level_2 20
#define Level_3 30
#define Level_4 40
unsigned char count = 0;
unsigned char count_max = Level_1;
char Current_LED = 1;
bit busy;
bit DIR = 0;
bit Start_Stop = 0; //0开始，1停止
void UARTInit(void);
void SendData(unsigned char dat);
void SendString(char *s);
void Timer0Init(void);
void Light_Current_LED(void);
void main()
{
UARTInit();
Timer0Init();
while(1)
{
// SendString("STC89");
Light_Current_LED();
}
}
/*----------------------------
UART interrupt service routine
----------------------------*/
void Uart_Isr() interrupt 4 using 1
{
unsigned char temp,command;
if (RI)
{
RI = 0; //Clear receive interrupt flag
temp = SBUF; //P0 show UART data
command = temp & 0XF0;
switch(command)
{
case 0x10 : Start_Stop = 0;break;
case 0x20 : Start_Stop = 1;break;
case 0x30 : if(DIR) Current_LED =1;else Current_LED =16;break;
case 0x40 : temp &= 0x0f; if(temp>0) count_max = Level_1 * temp;break;
case 0x50 : if(DIR) DIR = 0; else DIR = 1; break;
}
}
if (TI)
{
TI = 0; //Clear transmit interrupt flag
busy = 0; //Clear transmit busy flag
}
}
void Timer0_Isr() interrupt 1 using 1
{
TL0 = 0x00; //设置定时初值
TH0 = 0xA6; //设置定时初值
count++;
if(count >= count_max)
{
count = 0;
if(Start_Stop == 1)
{
return ;
}
if(DIR == 0) //顺时针右移
{
Current_LED ++;
if(Current_LED>16)
{
Current_LED = 1;
}
}
else //逆时针左移
{
Current_LED --;
if(Current_LED<0)
{
Current_LED = 16;
}
}
}
}
/*----------------------------
Send a byte data to UART
Input: dat (data to be sent)
Output:None
----------------------------*/
void SendData(unsigned char dat)
{
while (busy); //Wait for the completion of the previous data is sent
ACC = dat; //Calculate the even parity bit P (PSW.0)
busy = 1;
SBUF = ACC; //Send data to UART buffer
}
/*----------------------------
Send a string to UART
Input: s (address of string)
Output:None
----------------------------*/
void SendString(char *s)
{
while (*s) //Check the end of the string
{
SendData(*s++); //Send current char and increment string ptr
}
}
void UARTInit()
{
SCON = 0x50; //8-bit variable UART
TMOD = 0x20; //Set Timer1 as 8-bit auto reload mode
TH1 = TL1 = -(FOSC/12/32/BAUD); //Set auto-reload vaule
TR1 = 1; //Timer1 start run
ES = 1; //Enable UART interrupt
EA = 1;
}
void Timer0Init(void) //25毫秒@11.0592MHz
{
// AUXR &= 0x7F; //定时器时钟12T模式
TMOD &= 0xF0; //设置定时器模式
TMOD |= 0x01; //设置定时器模式
TL0 = 0x00; //设置定时初值
TH0 = 0xA6; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0 = 1;
}
void Light_Current_LED()
{
switch(Current_LED)
{
case 1 : P1 = ~0X01;P2 = ~0X00; break;
case 2 : P1 = ~0X02;P2 = ~0X00; break;
case 3 : P1 = ~0X04;P2 = ~0X00; break;
case 4 : P1 = ~0X08;P2 = ~0X00; break;
case 5 : P1 = ~0X10;P2 = ~0X00; break;
case 6 : P1 = ~0X20;P2 = ~0X00; break;
case 7 : P1 = ~0X40;P2 = ~0X00; break;
case 8 : P1 = ~0X80;P2 = ~0X00; break;
case 9 : P1 = ~0X00;P2 = ~0X01; break;
case 10 : P1 = ~0X00;P2 = ~0X02; break;
case 11 : P1 = ~0X00;P2 = ~0X04; break;
case 12 : P1 = ~0X00;P2 = ~0X08; break;
case 13 : P1 = ~0X00;P2 = ~0X10; break;
case 14 : P1 = ~0X00;P2 = ~0X20; break;
case 15 : P1 = ~0X00;P2 = ~0X40; break;
case 16 : P1 = ~0X00;P2 = ~0X80; break;
}
}

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仿真和源码下载：

串口控制流水灯.rar (61.82 KB, 下载次数: 55)

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单片机串口控制16位流水灯 仿真及源程序

单片机串口控制16位流水灯仿真及源程序