rs232 interfacing with 89c52

[visva]

In Hyper Terminal, there is no response when i send data from micro controller(89c52) through rs232. The following diagram is one of the circuit ( i checked UART communication and everything is ok). but i don't know what i doing wrong. please any one tell me what is the reason. i am using proteus,virtual serial port.

 

[kripacharya]

maybe you need an rs232 driver/ receiver chip to convert voltage levels ? like the max232.

 

[visva]

thanks for your reply . yes i was tried it before. i tried like in following diagram. is that is correct. or any other problems there.

 

[kripacharya]

thanks for your reply . yes i was tried it before. i tried like in following diagram. is that is correct. or any other problems there.View attachment 85484

yes i already saw your circuit setup.

try putting in an rs232 interface chip between uC and the rs232 port, like i said. clearly your software knows there is a mismatch and is giving you an error/ warning.

 

[visva]

i can get some output from max232. but i can't check in hyper terminal, is that working or not?
(note : i am using window7 64bit, there was no hyper terminal. so i copied that file from windows xp and then i am working on it). tell me now what is the problem (i used max232 also)

 

[kripacharya]

sorry, i can't help you any further. Try thinking for yourself now.

 

[visva]

its ok. thanks for your all reply....

 

[tpetar]

Take Hyper Terminal from Win XP and copy files in some folder, or you can use some other better program for this job.


Did you properly connect Gnd (common) ?


Try this programs.