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Pic16f628 hyperterminal connection

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Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

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turker1

Sun Mar 16 2008, 11:10AM

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Hi. I want to send some characters to pc.
I set baud rate 9600 in the pic.Then connect tx pin to serials rx. but in hyperterminal doesnt appear anything.
Then i set baud 2400 in my pic program. and opened hyperterminal . got some character but wrong chrachter .i sent 1 but get gç

i also used max232 but nothing changed.
please help. what is wrong?

electronic lover

jiraju

Mon Mar 17 2008, 01:22AM

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I recommend u to first check ur PC's serial port by shorting pin2 & 3 and send some characters via Hyper terminal. make sure u enabled the echo type character locally in settings->ASCII setup.
One more thing ground ur rx232 port's 5th pin with ur PC's 5th pin.

turker1

Mon Mar 17 2008, 07:05AM

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i tried. shorted 2&3. pins. then set baud rate 9600 and flow control hardware but when i send something nothing arrived.

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jiraju

Mon Mar 17 2008, 07:37AM

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ok means u checkd ur PC serial port...and since nothing is arrived in hyper terminal it means that there is some problem in ur PCs serial port...
did u select the correct COM port in PC???? to check that go to device manager-> Ports where u check the which port is assigned for serial port. And in hyper terminal select that port only and sort pin 2&3 of PC serial port and check again.

turker1

Mon Mar 17 2008, 07:38AM

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ok. which baud rate must i use? and flow control must be hardware or none?

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Ajay

Mon Mar 17 2008, 10:57AM

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keep flow control none.

well if its working then you must see whatever you are typing.

try 115200 baud.

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turker1

Tue Mar 18 2008, 05:12AM

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i tried if i press a key then comes the same one (without pressing enter)
so com port works.
now what is the problem?

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sashijoseph

Tue Mar 18 2008, 08:35AM

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i also used max232 but nothing changed.

You mean you even connected the PIC and PC without MAX232?
If so then your PIC's serial port may be busted.Try using a different PIC and also show us your code.
And remember never hook up the mcu's and PC's serial ports without a level converter.

Let there be music........

turker1

Tue Mar 18 2008, 08:43AM

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but i only used pic's tx pin. so i can connect directly.if i use rx so i must use max232.
i connected pic's tx to serial 's rx and gnd to (-)
my program:

#include <16F628.h>
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_b1, rcv=PIN_b2)
void main(){
for (;;){
putc('1');

}

}

electronic lover