STC单片机串口程序

//注意,如您使用的MCU没有那个功能,就不要 *** 作相应的寄存器

//注意,如您使用的MCU没有那那么大的扩展SRAM,就不要 *** 作超过范围的SRAM

#include<reg51h>

#include<intrinsh>

sfr S2CON = 0x9A;

//S2SM0,S2SM1,S2SM2,S2REN,S2TB8,SRB8,S2TI,S2RI

sfr IE2 = 0xAF;

//X,X,X,X,X,X,ESPI,ES2

sfr S2BUF = 0x9B;

sfr AUXR = 0x8e;

sfr BRT = 0x9c;

sfr IAP_CONTR = 0xC7;

sfr CCON = 0xD8;

sfr CMOD = 0xD9;

sfr CL = 0xE9;

sfr CH = 0xF9;

sfr CCAP0L = 0xEA;

sfr CCAP0H = 0xFA;

sfr CCAPM0 = 0xDA;

sfr CCAPM1 = 0xDB;

sbit CR = 0xDE;

sbit MCU_Start_Led = P1^7;

sbit S2_Interrupt_Receive_Led = P1^4;

//unsigned char self_command_array[4] = {0x22,0x33,0x44,0x55};

#define Self_Define_ISP_Download_Command 0x22

#define RELOAD_COUNT 0xfb //18432MHz,12T,SMOD=0,9600bps

void serial_port_one_initial();

void send_UART_one(unsigned char);

void UART_one_Interrupt_Receive(void);

void serial_port_two_initial();

void send_UART_two(unsigned char);

void UART_two_Interrupt_Receive(void);

void soft_reset_to_ISP_Monitor(void);

void delay(void);

void display_MCU_Start_Led(void);

void send_PWM(void);

void main(void)

{

unsigned int array_point = 0;

unsigned char xdata Test_array_one[512] =

{

0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,

0x08, 0x09, 0, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,

0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,

0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,

0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,

0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,

0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,

0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,

0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,

0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,

0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,

0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,

0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,

0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,

0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,

0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,

0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,

0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,

0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,

0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,

0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,

0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,

0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,

0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,

0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,

0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,

0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,

0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,

0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,

0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,

0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,

0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,

0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,

0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0,

0xef, 0xee, 0xed, 0xec, 0xeb, 0xea, 0xe9, 0xe8,

0xe7, 0xe6, 0xe5, 0xe4, 0xe3, 0xe2, 0xe1, 0xe0,

0xdf, 0xde, 0xdd, 0xdc, 0xdb, 0xda, 0xd9, 0xd8,

0xd7, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xd0,

0xcf, 0xce, 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc8,

0xc7, 0xc6, 0xc5, 0xc4, 0xc3, 0xc2, 0xc1, 0xc0,

0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,

0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0,

0xaf, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa8,

0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0,

0x9f, 0x9e, 0x9d, 0x9c, 0x9b, 0x9a, 0x99, 0x98,

0x97, 0x96, 0x95, 0x94, 0x93, 0x92, 0x91, 0x90,

0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88,

0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,

0x7f, 0x7e, 0x7d, 0x7c, 0x7b, 0x7a, 0x79, 0x78,

0x77, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x70,

0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68,

0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0x61, 0x60,

0x5f, 0x5e, 0x5d, 0x5c, 0x5b, 0x5a, 0x59, 0x58,

0x57, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x50,

0x4f, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x48,

0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0x41, 0x40,

0x3f, 0x3e, 0x3d, 0x3c, 0x3b, 0x3a, 0x39, 0x38,

0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x30,

0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28,

0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20,

0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,

0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,

0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0, 0x09, 0x08,

0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00

};

unsigned char i = 0;

serial_port_one_initial(); //串口1初始化

// serial_port_two_initial(); //串口2初始化

display_MCU_Start_Led(); //点亮发光二极管表示单片机开始工作

// send_UART_two(0x55); //串口2发送数据表示单片机串口正常工作

// send_UART_two(0xaa); //串口2发送数据表示单片机串口正常工作

/

for(array_point=0; array_point<512; array_point++)

{

send_UART_two(Test_array_one[array_point]);

}

/

send_UART_one(0x34); //串口1发送数据表示单片机串口正常工作

send_UART_one(0xa7); //串口1发送数据表示单片机串口正常工作

for(array_point=0; array_point<512; array_point++)

{

send_UART_one(Test_array_one[array_point]);

}

// send_PWM(); //6kHz PWM, 50% duty

while(1);

}

void serial_port_one_initial()

{

SCON = 0x50; //0101,0000 8位可变波特率，无奇偶校验位

// TMOD = 0x21; //0011,0001 设置顶时器1为8位自动重装计数器

// TH1 = RELOAD_COUNT; //设置定时器1自动重装数

// TL1 = RELOAD_COUNT;

// TR1 = 1; //开定时器1

BRT = RELOAD_COUNT;

// BRTR = 1, S1BRS = 1, EXTRAM = 1 ENABLE EXTRAM

AUXR = 0x11; // T0x12,T1x12,UART_M0x6,BRTR,S2SMOD,BRTx12,EXTRAM,S1BRS

ES = 1; //允许串口中断

EA = 1; //开总中断

}

void serial_port_two_initial()

{

//sfr SCON = 0x98;

//SM0,SM1,SM2,REN,TB8,RB8,TI,RI

//sfr S2CON = 0x9A;

//S2SM0,S2SM1,S2SM2,S2REN,S2TB8,S2RB8,S2TI,S2RI

//sfr S2BUF = 0x9B;

//sfr IE2 = 0xAF;

//X,X,X,X,X,X,ESPI,ES2

S2CON = 0x50; //0101,0000 8位可变波特率，无奇偶校验位,允许接收

BRT = RELOAD_COUNT;

// BRTR = 1, S1BRS = 1, EXTRAM = 0 ENABLE EXTRAM

AUXR = 0x11; // T0x12,T1x12,UART_M0x6,BRTR,S2SMOD,BRTx12,EXTRAM,S1BRS

// ES = 1; //允许串口1中断

// ES2 = 1

IE2 = 0x01; //允许串口2中断,ES2=1

EA = 1; //开总中断

}

void send_UART_one(unsigned char i)

{

ES = 0; //关串口中断

TI = 0; //清零串口发送完成中断请求标志

SBUF = i;

while(TI ==0); //等待发送完成

TI = 0; //清零串口发送完成中断请求标志

ES = 1; //允许串口中断

}

void send_UART_two(unsigned char i)

{

//sfr SCON = 0x98;

//SM0,SM1,SM2,REN,TB8,RB8,TI,RI

//sfr S2CON = 0x9A;

//S2SM0,S2SM1,S2SM2,S2REN,S2TB8,S2RB8,S2TI,S2RI

//sfr S2BUF = 0x9B;

//sfr IE2 = 0xAF;

//X,X,X,X,X,X,ESPI,ES2

unsigned char temp = 0;

// ES = 0; //关串口1中断

IE2 = 0x00; //关串口2中断,es2=0

// TI = 0; //清零串口1发送完成中断请求标志

S2CON = S2CON & 0xFD; //B'11111101,清零串口2发送完成中断请求标志

// SBUF = i;

S2BUF = i;

// while(TI ==0); //等待发送完成

do

{

temp = S2CON;

temp = temp & 0x02;

}while(temp==0);

// TI = 0; //清零串口发送完成中断请求标志

S2CON = S2CON & 0xFD; //B'11111101,清零串口2发送完成中断请求标志

// ES = 1; //允许串口1中断

// ES2 = 1

IE2 = 0x01; //允许串口2中断,ES2=1

}

void UART_one_Interrupt_Receive(void) interrupt 4

{

unsigned char k = 0;

if(RI==1)

{

RI = 0;

k = SBUF;

if(k==Self_Define_ISP_Download_Command) //是自定义下载命令

{

delay(); //延时1秒就足够了

delay(); //延时1秒就足够了

soft_reset_to_ISP_Monitor(); //软复位到系统ISP监控区

}

send_UART_one(k+1);

}

else

{

TI = 0;

}

}

void UART_two_Interrupt_Receive(void) interrupt 8

{

//sfr SCON = 0x98;

//SM0,SM1,SM2,REN,TB8,RB8,TI,RI

//sfr S2CON = 0x9A;

//S2SM0,S2SM1,S2SM2,S2REN,S2TB8,S2RB8,S2TI,S2RI

//sfr S2BUF = 0x9B;

//sfr IE2 = 0xAF;

//X,X,X,X,X,X,ESPI,ES2

unsigned char k = 0;

k = S2CON ;

k = k & 0x01;

//if(S2RI==1)

if(k==1)

{

//RI = 0;

S2CON = S2CON & 0xFE; //1111,1110

S2_Interrupt_Receive_Led = 0;

k = S2BUF;

if(k==Self_Define_ISP_Download_Command) //是自定义下载命令

{

delay(); //延时1秒就足够了

delay(); //延时1秒就足够了

soft_reset_to_ISP_Monitor(); //软复位到系统ISP监控区

}

send_UART_two(k+1);

}

else

{

//TI = 0;

S2CON = S2CON & 0xFD; //1111,1101

}

}

void soft_reset_to_ISP_Monitor(void)

{

IAP_CONTR = 0x60; //0110,0000 软复位到系统ISP监控区

}

void delay(void)

{

unsigned int j = 0;

unsigned int g = 0;

for(j=0;j<5;j++)

{

for(g=0;g<60000;g++)

{

_nop_();

_nop_();

_nop_();

_nop_();

_nop_();

}

}

}

void display_MCU_Start_Led(void)

{

//sbit MCU_Start_Led = P1^7;

unsigned char i = 0;

for(i=0;i<1;i++)

{

MCU_Start_Led = 0; //顶亮MCU开始工作指示灯

delay();

MCU_Start_Led = 1; //熄灭MCU开始工作指示灯

delay();

MCU_Start_Led = 0; //顶亮MCU开始工作指示灯

}

}

void send_PWM(void)

{

CMOD = 0x00; // CIDL - - - - CPS1 CPS0 ECF Setup PCA Timer

// CPS1 CPS0 = 00, Fosc/12 is PCA/PWM clock

// 18432000/12/256 = 6000

CL = 0x00;

CH = 0x00;

CCAP0L = 0x80; //Set the initial value same as CCAP0H

CCAP0H = 0x80; //50% Duty Cycle

CCAPM0 = 0x42; //0100,0010 Setup PCA module 0 in 8BIT PWM, P37

CR = 1; //启动 PCA/PWM 定时器

}

CCON = 0; //初始化PCA控制寄存器，PCA定时器停止，清除CF标志，清除模块中断标志

CL = 0; //复位PCA计数寄存器

CH = 0;

CMOD = 0x02; //设置PCA时钟源为sysclock/2，禁止PCA定时器溢出中断

value = T100KHz; //计算PCA输出100K方波应设定的值

CCAP0L = value; //将值得低8位赋给CCAP0L

CCAP0H = value >> 8; //高8位赋给CCAP0H

value += T100KHz; //累加，为下一次赋值做好准备。//这个地方绝对不能注释掉，产生方波就靠它了。

CCAPM0 = 0x4d; //PCA模块1为16位定时器模式,同时反转CEX0(P13)口

CR = 1; //PCA定时器开始工作

EA=1; //开中断

========================================================

void pca_isr()interrupt 7 using 1

{

CCF0=0;

CCAP0L=value;

CCAP0H=value>>8;

//value +=T100KHZ; //累加，这个地方也绝对不能注释掉。要产生方波，就得每次在原值的基础上加上同样的值。

}

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