serial programming on proteus - max232 problem

[wolverine123]

max232 problem

hey guys i was trying to simulate serial programming on proteus and tried to send a character, i added a virtual terminal at the beginning before passing through max232 and i could see the character fine... but after passing through the max232 i never got the same character again... like if sent 'A' i would get '_' after passing through max232.... can anyone please help :S

 

[nandhu015]

Re: max232 problem

No one can answer your question without your circuit

Check your circuit twice. Only possible problem is with the circuit

Nandhu

 

[davidgrm]

max232 problem

Remember that the Max effectively inverts your signal. You need to send it through another Max

 

[wolverine123]

Re: max232 problem

The following pic shows the text being transmitted fine



but the following after passing through max232 shows something else




But if it's getting inverted then i wont see the desired output when i attach a serial cable and test the output in hyperterminal????

 

[Kurenai_ryu]

max232 problem

the vterm in ISIS has to be inverted to connect a mx232 in simulation... have you selected to invert RXD and TXD in the vterm properties??? maybe that's the problem...

 

[tonyela]

Re: max232 problem

I know this very old thread, but I want to put the answer there just incase anyone look for it.
Right click on the virtual terminal, edit properties, change from normal to inverts.