STC单片机串口接收程序

一组数据，共有多少字节？ 20 个？

根据字节数，设定一个数组。

收到一个，存放一个。

收到 20 个后，判断：

if (recbuf[16] == 'm' &&recbuf[17] == 'b' &&recbuf[18] == 'a' &&recbuf[19] == 'r')

满足条件，就把其前面的，变换成数：

//recbuf[1] = '.'

x = (recbuf[0] - 48) + (recbuf[2] - 48) * 0.1 + (recbuf[3] - 48) * 0.01

//recbuf[4] = ' ' //recbuf[7] = '.'

n = (recbuf[5] - 48) * 10 + (recbuf[6] - 48) + (recbuf[8] - 48) * 0.1

//recbuf[9] = ' ' //recbuf[13] = '.'

p = (recbuf[10] - 48) * 100 + (recbuf[11] - 48) * 10 + (recbuf[12] - 48)

+ (recbuf[14] - 48) * 0.1 + (recbuf[15] - 48) * 0.01

//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<reg51.h>

#include<intrins.h>

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 //18.432MHz,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, 0x0a, 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, 0x0a, 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=0array_point<512array_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=0array_point<512array_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=0j<5j++)

{

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

{

_nop_()

_nop_()

_nop_()

_nop_()

_nop_()

}

}

}

void display_MCU_Start_Led(void)

{

//sbit MCU_Start_Led = P1^7

unsigned char i = 0

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

{

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, P3.7

CR = 1 //启动 PCA/PWM 定时器

}

你先看看串口线有没问题：

将串口的2、3脚两根针短接，用键盘在串口调试输入字符，如果串口调试接收区能够显示输入的字符，说明串口工作正常

等我再看看程序

我觉得这儿有问题 JBC TI,SEND

JBC在T1为0的时候，会顺序执行，然后就end了 ，这里我觉得应该改为等待发送结束的指令

JNB T1, $

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