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*  Full-Duplex Serial Driver v1.1  *
*  (C) 2006 Parallax, Inc.         *
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Object "FullDuplexSerial" Interface:

PUB  start(rxpin, txpin, mode, baudrate) : okay
PUB  stop
PUB  rxcheck : rxbyte
PUB  rx : rxbyte
PUB  tx(txbyte)
PUB  str(stringptr)
PUB  dec(value)
PUB  hex(value, digits)
PUB  bin(value, digits)

Program:     156 Longs
Variable:     18 Longs

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PUB  start(rxpin, txpin, mode, baudrate) : okay

 Start serial driver - starts a cog
 returns false if no cog available

 mode bit 0 = invert rx
 mode bit 1 = invert tx
 mode bit 2 = open-drain/source tx
 mode bit 3 = ignore tx echo on rx

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PUB  stop

 Stop serial driver - frees a cog

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PUB  rxcheck : rxbyte

 Check if byte received (never waits)
 returns -1 if no byte, $00..$FF if byte

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PUB  rx : rxbyte

 Receive byte (may wait for byte)
 returns $00..$FF

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PUB  tx(txbyte)

 Send byte (may wait for room in buffer)

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PUB  str(stringptr)

 Send string                    

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PUB  dec(value)

 Print a decimal number

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PUB  hex(value, digits)

 Print a hexadecimal number

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PUB  bin(value, digits)

 Print a binary number 