Inverted Serial Communication

[khansaab21]

Hello guys. Up till now i have been using the built in serial port and default serial protocol available in microcontrollers (like PIC). Since default state of the Tx (transmit) pin is HI, i need to use the inverted mode i.e. i need the default state of the Tx pin to be low. How could i implement it with the serial pins available in the controller.

Can only one PNP transistor could serve the purpose or is there anyother direct method??

 

[anandpv2009]

You can do this with your software, no need of any hardware parts..

In CCS

#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, FORCE_SW, BITS=8, STOP=1, PARITY=N,INVERT,stream=COM_A)

You should use software UART if inverted...

As shown above

FORCE_SW ( force_software )