Synchronous Serial (bitwise ops)

Author	Message
vk4tec Senior Member Joined: 24/03/2012 Location: Australia Posts: 239	Posted: 08:09am 25 Mar 2012       Hello One of my dream projects is to be able to handle Syncronous Serial in a PIC Synchronous serial has a clock, and data not ASYNCH - no stop and start. It relies on the user to clock in the 1' and 0's ROLL the data and worry about it. The user should then look for a pattern to "BITALIGN" with the data stream. In HDLC I think they have an idle character you are to align to, or more importantly, a pattern to lock onto to, then take 8 bits at a time. I think I can get away with it easily in Assembly langauge. 1. Look for a pin transition on the clock PIN, sample the data PIN 2. Shift and populate the next bit in an 8 bit register. 3. Look to see if that is the pattern we want ( FLAG ? ) 4. If yes, then just keep clocking in 8 bits at a time. I have read the forum and I see some Basic Language BITWISE functions requested. I think what I would need is like a ROLL or SHIFT function, and an AND operator ? My aim in the end is to go HDLC SYNCH SERIAL to Ethernet ( UDP ) - Andrew Rich VK4TEC - Edited by vk4tec 2012-03-26 Andrew Rich VK4TEC www.tech-software.net