How to test the RS232 is working or not?

[McMurry]

I have a microcontroller PIC16F877
connected to MAX232
and to serial port.

Is there any short codes I can use to check if the RS232 circuit is working?
I just started learning PIC programming.

 

[jit_singh_tara]

check out the data on oscilloscope digital ....

 

[IanP]

try this code as it is, or you may modify it to suit your application:

http://www.piclist.com/techref/microchip/16f876-hint-tk.htm

rgds,
ianp

 

[yviswanathbe]

Try using docklight software.

u can download it form the below linkl

https://www.docklight.de/download_en.htm

 

[garg29]

Try interfacing with Hyperterminal.

 

[H_D_R]

I have a microcontroller PIC16F877
connected to MAX232
and to serial port.

Is there any short codes I can use to check if the RS232 circuit is working?
I just started learning PIC programming.

simply remove the MCU from the circuit.
then using hyperterminal check the communication.
you will be able to know whether your IC is working or not.
i ma gussing you must be know how to use hyperterminal for serial communication..:|

 

[davidgrm]

simply remove the MCU from the circuit.
then using hyperterminal check the communication.
you will be able to know whether your IC is working or not.

This would only work if your bridge the 2 pins where the MCU transmit and Receive were.
A simple test is leave the MCU in. Disconnect from the PC. Bridge the Max 232 TX out an RX in pins. If you make the TX pin of the MCU a 1 you should see a 1 on the RX pin, and if you make TX a 0 the RX should also go to 0. If this works it is most likely a MCU setup or coding error.

 

[McMurry]

Thank you for all the advices.
Finally I had managed to make the RS232 serial conn. working!

 

[H_D_R]

Thank you for all the advices.
Finally I had managed to make the RS232 serial conn. working!

congrets...

cheers...

 

[muralicrl]

Hi,

See the attachment, and install the Docklight software in your PC and you can check the serial port connection.

If you need more information, contact me.