[SOLVED] problem in receiving data through rs232

[shanthi rani]

Hi...
can anybody help me...
am facing problm in receiving data over hyperterminal.
when am sending ascii letter A, its showing some special symbols...
how to rectify this...

 

[jayanth.devarayanadurga]

baudrate is not matching.

 

[shanthi rani]

i hav set baud rate for pc as well in TH1 i.e 9600

 

[jayanth.devarayanadurga]

Post code.

 

[shanthi rani]

jst a v simple code to transmit ASCII 1
#include<reg52.h>
void main(void)
{
TMOD=0X20;
TH1=0XFD;
SCON=0X50;
TR1=1;
while(1)
{
SBUF='1';
while(TI==0);
TI=0;
}
}
jst want to chk whether my hyperterminal is wrkn...

 

[jayanth.devarayanadurga]

https://saeedsolutions.blogspot.in/2012/05/interfacing-with-uart-of-8051.html

**broken link removed**

Data might be inverted. Use RealTerm at the PC side.

 

[shanthi rani]

Use RealTerm at the PC side....
means?
how to use
i didnt understand..

 

[jayanth.devarayanadurga]

Download RealTerm from sourceforge.net and install and use it. Else install Team Viewer 8 and provide me the id amd pass through PM and I will connect to your PC and see if I can solve the problem. Have you compiled the code for proper Clock frequency in Compiler?

---

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
#include<reg52.h>
 
void main(void)
{
        P3 = 0x03;
    TMOD = 0X20;
    TH1 = 0XFD;
    SCON = 0X50;
    TR1 = 1;
    ES = 1;
    EA = 1;
    
    while(1)
    {
        SBUF = 'A';
        while(TI == 0);
        TI = 0;
    }
}

---

 

[shanthi rani]

i will try n see whethr its wrkn..
if it doesnt thn will go for TW...

 

[jayanth.devarayanadurga]

Previous post updated.

 

[shanthi rani]

hi sir,
pls can u explain wht is thi ES=1;
EA=1;
P3=0x03;
n why hav u used them...........

 

[jayanth.devarayanadurga]

ES = Enable Serial Interrupts
EA = Enable All Interrupts (Global Interrupts)
P3 UART pins set as Input pins.

 

[shanthi rani]

ES = Enable Serial Interrupts
EA = Enable All Interrupts (Global Interrupts)
P3 UART pins set as Input pins.

k thnks sir

 

[jayanth.devarayanadurga]

Got the right output? If yes close the thread.

 

[shanthi rani]

Got right output. If yes close the thread.

k....
k will chk n close the project...