1. 怎樣編寫單片機的串口通信的程序
GCC只是一個編譯器，和別的編譯器一樣。 串口通訊程序一般都是這樣一個流程（AVR單片機正常工作的情況下）： 1 配置時鍾，包括使能時鍾，配置串口波特率。 2 其他配置，包括校驗設置，使能串口等。 3 收發數據。主要過程為查詢串口標志位，然後根據串口標志位去判斷是否完成了收發數據。 按照這三個步驟去寫程序，應該很快就能完成一個通訊程序。
2. 51單片機 串口程序
void
main()
{
scon
=
0x50;
tmod
=
0x20;
//設置定時器1為工作方式2
th1
=
0xf4;
tl1
=
0xf4;
tr1
=
1;
ea
=
1;
es
=
1;
while(1)
{
if(flag)
{
flag
=
0;
//不關閉串口中斷，要讓它繼續接收
num1++;
//超過255，自動就是0
sbuf
=
num1;
while(!ti);
ti
=
0;
sbuf
=
a;
while(!ti);
ti
=
0;
}
}
}
void
ser()
interrupt
4
{
if
(ri)
{
ri
=
0;
a
=
sbuf;
flag
=
1;
}
}
3. 怎樣編寫單片機的串口通信的程序，一般的步驟是怎麼樣
編寫串口通訊程序步驟為：
1、設置波特率
2、設置串口工作方式
3、收發數據。
比如：
main()
{
unsignedchardat;
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
TR1=1;
SCON=0x50;
while(1)
{
while(RI==0);
RI=0;
dat=SBUF;
SBUF=~dat;
while(TI==0)
TI=0;
}
}
4. 單片機串口通信程序
串口部分沒有對，你好好看看串列口控制器SCON裡面RI和TI的用法。TI=1不是啟動發送，而是表示發送完畢。一般來說，發送一個數據，可以這樣寫：
voidSend_Char(charp)
{
SBUF=p;
while(!TI);
TI=0;
}
發送一串數據，假設是p[]，那麼程序代碼可以這樣寫：
voidSend_Str(char*p)
{
chari=0;
while(p[i]!=' ')
{
SBUF=p[i];
while(!TI);
TI=0;
i++;
}
}
5. STC單片機串口程序
//注意,如您使用的MCU沒有那個功能,就不要操作相應的寄存器
//注意,如您使用的MCU沒有那那麼大的擴展SRAM,就不要操作超過范圍的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(); //點亮發光二極體表示單片機開始工作
// send_UART_two(0x55); //串口2發送數據表示單片機串口正常工作
// send_UART_two(0xaa); //串口2發送數據表示單片機串口正常工作
/*
for(array_point=0; array_point<512; array_point++)
{
send_UART_two(Test_array_one[array_point]);
}
*/
send_UART_one(0x34); //串口1發送數據表示單片機串口正常工作
send_UART_one(0xa7); //串口1發送數據表示單片機串口正常工作
for(array_point=0; array_point<512; array_point++)
{
send_UART_one(Test_array_one[array_point]);
}
// send_PWM(); //6kHz PWM, 50% ty
while(1);
}
void serial_port_one_initial()
{
SCON = 0x50; //0101,0000 8位可變波特率，無奇偶校驗位
// TMOD = 0x21; //0011,0001 設置頂時器1為8位自動重裝計數器
// TH1 = RELOAD_COUNT; //設置定時器1自動重裝數
// TL1 = RELOAD_COUNT;
// TR1 = 1; //開定時器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; //允許串口中斷
EA = 1; //開總中斷
}
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位可變波特率，無奇偶校驗位,允許接收
BRT = RELOAD_COUNT;
// BRTR = 1, S1BRS = 1, EXTRAM = 0 ENABLE EXTRAM
AUXR = 0x11; // T0x12,T1x12,UART_M0x6,BRTR,S2SMOD,BRTx12,EXTRAM,S1BRS
// ES = 1; //允許串口1中斷
// ES2 = 1
IE2 = 0x01; //允許串口2中斷,ES2=1
EA = 1; //開總中斷
}
void send_UART_one(unsigned char i)
{
ES = 0; //關串口中斷
TI = 0; //清零串口發送完成中斷請求標志
SBUF = i;
while(TI ==0); //等待發送完成
TI = 0; //清零串口發送完成中斷請求標志
ES = 1; //允許串口中斷
}
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; //關串口1中斷
IE2 = 0x00; //關串口2中斷,es2=0
// TI = 0; //清零串口1發送完成中斷請求標志
S2CON = S2CON & 0xFD; //B'11111101,清零串口2發送完成中斷請求標志
// SBUF = i;
S2BUF = i;
// while(TI ==0); //等待發送完成
do
{
temp = S2CON;
temp = temp & 0x02;
}while(temp==0);
// TI = 0; //清零串口發送完成中斷請求標志
S2CON = S2CON & 0xFD; //B'11111101,清零串口2發送完成中斷請求標志
// ES = 1; //允許串口1中斷
// ES2 = 1
IE2 = 0x01; //允許串口2中斷,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) //是自定義下載命令
{
delay(); //延時1秒就足夠了
delay(); //延時1秒就足夠了
soft_reset_to_ISP_Monitor(); //軟復位到系統ISP監控區
}
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) //是自定義下載命令
{
delay(); //延時1秒就足夠了
delay(); //延時1秒就足夠了
soft_reset_to_ISP_Monitor(); //軟復位到系統ISP監控區
}
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 軟復位到系統ISP監控區
}
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; //頂亮MCU開始工作指示燈
delay();
MCU_Start_Led = 1; //熄滅MCU開始工作指示燈
delay();
MCU_Start_Led = 0; //頂亮MCU開始工作指示燈
}
}
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 mole 0 in 8BIT PWM, P3.7
CR = 1; //啟動 PCA/PWM 定時器
}
6. 51單片機串口收發程序
11，單片串口的收發程序鎮甘城子應該也是比較不錯的證件，能夠真誠地使用所有認為這個屬相應該比較廣一點兒也不所以我認為這跟屏幕放大。
7. 求51單片機串口接收程序
void Init_Com(void)//功能:串口初始化,波特率，方式1
{
TMOD=0x20;//定時器工作方式2
TH1=0xfa;//晶振11.0592，波特率4800
TL1=0xfa;
SCON=0x50;//串列口工作在方式1，允許接收，波特率由定時器控制
PCON=0x00;//串列口加倍位為0
ES=1;
TR1=1;
ES = 1; //開串口中斷
EA = 1; //開總中斷
}
void Com_Int(void) interrupt 4 //串口接收中斷函數
{
EA = 0;
if(RI == 1) //當硬體接收到一個數據時，RI會置位
{
DATA= SBUF; //保存接收到的數據
RI = 0; //接收到一位數據後就讓RI為零，關閉中斷
}
EA = 1;
}
8. 編寫單片機串口收發數據的完整程序（C語言編寫）
我用的新唐晶元，8051內核，跟51差不多，望採納
void UART_Initial (void)
{
P02_Quasi_Mode; //Setting UART pin as Quasi mode for transmit
P16_Quasi_Mode; //Setting UART pin as Quasi mode for transmit
SCON_1 = 0x50; //UART1 Mode1,REN_1=1,TI_1=1
T3CON = 0x08; //T3PS2=0,T3PS1=0,T3PS0=0(Prescale=1), UART1 in MODE 1
clr_BRCK;
RH3 = HIBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */
RL3 = LOBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */
set_TR3; //Trigger Timer3
}
以上是初始化的
void Send_Data_To_UART1(UINT8 c)
{
TI_1 = 0;
SBUF_1 = c;
while(TI_1==0);
}
這個是發送
void UART_isr (void) interrupt 4 //串列中斷服務程序
{
if (RI_1==1)
{ /* if reception occur */
clr_RI_1; /* clear reception flag for next reception */
Receive_Date[c] = SBUF_1;
if (Receive_Date[0] == First_Date)
{
c++;
}
else if(Receive_Date_Size > 0 && Receive_Date_Size < 4)
{
c++;
}
else if(Receive_Date[c] == Last_Date && Receive_Date_Size ==4)
{
c = 0;
Flag_Receive_One = 1;
}
else
{
c = 0;
}
}
}
接收
9. 簡單51單片機串口程序
試試下列程序，這時用中斷發送的。
#include<reg51.h>
#define uchar unsigned char
uchar txt[] = "hello";
uchar i = 0;
void main(void)
{
PCON = 0X00;
SCON = 0X50;
TMOD = 0X20;
TH1 = 0XFD;
TL1 = 0XFD;
TR1 = 1;
EA = 1;
ES = 1;
TI = 1;
while(1) {
if(i == 6) {
i = 0;
TI = 1;
}
}
}
void uart() interrupt 4
{
if(RI == 1) RI = 0;
if(TI == 1) {SBUF = txt[i++]; TI = 0;}
}
本程序，可以用串口助手接收。收到的是：hellohellohellohellohello....
10. 單片機串口程序
用中斷方式就行了，程序寫到串口中斷程序中去