Circuit Project Electronic

This code runs on a PIC 16F627A or 628A (and A.F.A.I.K 627/628 parts). It uses the serial USART on the PIC to communicate with a PC. Through this a simple CLI (Command Line Interface) is implemented that allows commands to be sent to the PIC to control output lines and read and return the status of inputs on the PIC The serial interface is configured to operate at 9600bps, 8bits, No Parity, 1 stop bit. Port A is configured as the output port, not forgetting that RA4 is an ‘input only’. Port B is used as the input port, again RB1 and RB2 are used by the PIC USART so aren’t available.
Read Source: http://picprojects.org.uk/projects/picprojects.htm#IO