keithdoxey
- 24th May 2006, 11:05
Hi All,
Would I be correct in assuming the following about running LCDout in 8 bit mode
1. The only penalty is the use of an extra 4 PIC pins
2. Each character would be output in half the time as PBP is writing a single byte rather than 2 nibbles.
Is there anything else to be aware of other than the need to
DEFINE LCD_BITS 8
Until now all my LCD work has been done using 4bit mode but I need to allocate a whole port for writing to a crosspoint chip which is parallel rather than serial or I2C. I will be sharing this port with the LCD so it seems logical to use all 8 bits as they are available to me. The Crosspoint and LCD have individual enable lines so shared data isnt a problem. Will probably be using PortD on an 18F4520. Project originally started with a 16F877 but has "grown" :)
Am I missing anything obvious ?
Regards
Would I be correct in assuming the following about running LCDout in 8 bit mode
1. The only penalty is the use of an extra 4 PIC pins
2. Each character would be output in half the time as PBP is writing a single byte rather than 2 nibbles.
Is there anything else to be aware of other than the need to
DEFINE LCD_BITS 8
Until now all my LCD work has been done using 4bit mode but I need to allocate a whole port for writing to a crosspoint chip which is parallel rather than serial or I2C. I will be sharing this port with the LCD so it seems logical to use all 8 bits as they are available to me. The Crosspoint and LCD have individual enable lines so shared data isnt a problem. Will probably be using PortD on an 18F4520. Project originally started with a 16F877 but has "grown" :)
Am I missing anything obvious ?
Regards