LCD example driver

jmaudley · Joined: 01 Feb 2011 Posts: 32 Location: 53

Hi,

I'm trying to get LCD.C example driver up and running.

The hardware is working. I know this because I can program it using another development language/compiler and it works.

The LCD interface is all portB so I want to use the port access.

The only issue I see is that the order of the pins is not the same as the example so I need to reconfigure pin access.

My port B is configured with the data lines on B0,1,2,3.
B4 is unused.
B5 is enable
B6 is rw
B7 is rs

So I have edited the LCD_PIN_MAP:

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

It defaults to using PortD. You have to tell it to use PortB:
http://www.ccsinfo.com/forum/viewtopic.php?t=43170

jmaudley · Joined: 01 Feb 2011 Posts: 32 Location: 53

Thanks that was one of the problems.

I am also sharing the portB signals with the programmer interface.

It's taken me 4 hours of head scratching to realise that the programmer , which was connected, is affecting the state of the R/W signal.

When I unplugged the programmer it burst into life.