Martin Honeywill wrote: > I'm implementing a comms protocol which requires RS485 half > duplex comms with a 9 bit data word for the first byte. I'm new > to the LPC214x chips so was wondering if anyone could give me > some pointers. Depends on the baud rate. For a vending machine app (9600 baud) we just bit-banged the 9 bit ports using a timer interrupt and a state machine. This left the UARTs for high speed use. Oh, the joys of 60MHz single chip CPUs. Stephen -- Stephen Pelc, stephen@... MicroProcessor Engineering Ltd - More Real, Less Time 133 Hill Lane, Southampton SO15 5AF, England tel: +44 23 80 631441, fax: +44 23 80 339691 web: http://www.mpeforth.com - free VFX Forth downloads
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RS485 9 Bit Comms on LPC2148
2005-12-13 by Stephen Pelc