View Full Version : USART Communication between two PIC Mucrocontrollers

04-29-2008, 09:18 PM
I am developing some sort of multi controller device. It has two PIC microcontrollers (PIC18F4550 and PIC18F4680) can i use the USART for communication between the chips i.e. Can I just connect the RX of one chip to the TX of the other chip to do this? And can I use the serial data receive interrupt to read the data? At what maximum baud rate can i transfer the data? (The two microcontrollers just few centimeters apart as they are on the same board)

04-29-2008, 09:48 PM
offcourse you can connect both the controllers tru serial port, and about baud rate , as much as both can handle in common.

05-01-2008, 01:01 PM
usart can be connected directly between 2 controllers and via a max232 to a computer , see if you have the correct wiring done otherwise your serial port or mcu will blow up

05-03-2008, 12:30 PM
Yes you may connect them dirctly. Since they are only centimeters aparat and probably on the same board, there is no need of a line driver like max232.

I personally prefer I2C bus for such communication

05-03-2008, 01:39 PM
do u know how to implement i2c in a microcontroller like atmega16??

if yes then can u please tell me how to do it or any specific tutorials abt it?