Matrix user forums

Hi I am looking for some help using the rs232 e block (eb015), i am using a PIC 18F452 and am looking to recieve an ASCII input from the rs232 which is connected to an access control system. Firstly i have assumed that the rs232 eblock needs to be connected to PortC, is this correct or can it be connected to any other port? Secondly i am having trouble setting the jumpers to the correct settings as the access control system which is sending the ASCII codes uses pin 2 for Tx and pin 3 for Rx. I am not using CTS or RTS so i currently have the jumpers set at D & 2. However it seems that i cant recieve the data from the access control system, any ideas would be much appreciated.

Thanks

That chip has the UARTs Tx and Rx lines on C6 and C7. Therefore, you will need to connect the E-Block to port C and use jumper positions C and 2.

You can use this E-Block on any port/pin, but if you did you would need to develop your own bit-bang code implementation of RS232.

thanks i have cracked the rs232 connection, but am now struggling trying to set up a custom interrupt for the rs232, does anyone know where to start with this.

sox

there are some other threads on this forum that have dealt with this. Have you tried searching the forums?