leolib2004
Junior Member level 3
Hi! I am making a 485 bus to connect a rabbit (RCM 3710) with 4 pics (16f628A). I use 7lb176 transceiver and no resistors for the line because it is a short line (less than 30 cm).
The problem is that i send 5 bytes from Rabbit to PIC and the first bit of the first byte sometimes changes (1 to 0 or 0 to 1).
Communication from PIC to Rabbit is ok. All 5 bytes are received ok from the rabbit.
What do you suggest?
I think it is strange because it not always happens and it is just one bit...
PD: I use PKT libraries for the Rabbit and UART library from "MICRO C" for the PIC.
The problem is that i send 5 bytes from Rabbit to PIC and the first bit of the first byte sometimes changes (1 to 0 or 0 to 1).
Communication from PIC to Rabbit is ok. All 5 bytes are received ok from the rabbit.
What do you suggest?
I think it is strange because it not always happens and it is just one bit...
PD: I use PKT libraries for the Rabbit and UART library from "MICRO C" for the PIC.