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Re: Interfacing with LCD to debug
Quote:
Originally Posted by keen101
Where do I wire up the TX and RX lines of the TTL port to the LCD?
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Based on the diagram, that LCD is not compatible with the TTL port. The diagram shows it wired to a "printer port", which is a parallel interface. The TTL port is a serial port. (It may be possible that the LCD also has a serial interface, not shown in this diagram.)
A byte consists of 8 bits. A parallel interface uses 8 pins and sends all bits at the same time (plus some control pins). A serial interface uses 1 pin and sends each bit in sequence.
You could still use the RC to control this LCD, but you would have to use the digital I/O pins, not the TTL port.
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