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Non black box LCD problem!!! (%u fails)

 
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micromouse



Joined: 24 May 2007
Posts: 3

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Non black box LCD problem!!! (%u fails)
PostPosted: Sun Jun 24, 2007 5:14 am     Reply with quote
I'm using CCS with MPLAB 7.5 on an ICD2 programming a simple 8x2 POWERTIP LCD.

The following code works, but when I try to print using anything else than %X I get blank lines and the code fails. I have looked at timing issues, check all connections, am now wondering if there is something really strange going on.

Code that works

Code:

#include <16F648A.h>
#device   ICD=TRUE
#fuses INTRC,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4MHz)

#include <lcd.c>

void main()
{
   int value;
   lcd_init();
   delay_ms(1000);
   
   value=1;
   while (1)
   {
      printf(lcd_putc,"\fX:%X %X\n",value,value);
      printf(lcd_putc,"H: %X",value);

      delay_ms(500);
      value=value+1;
   }
}


The result of this code is

X:56 56
H: 56

and the values count up as they should.

However if I change the %X to %u I get the following

X:1 1

and nothing else.

Any ideas? Have tried both the CCS and the flex LCD drivers with the same result.

Wayne
micromouse



Joined: 24 May 2007
Posts: 3

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Futher along the line
PostPosted: Sun Jun 24, 2007 5:27 am     Reply with quote
Have now tried the code on an 887 board with a 16x2 LCD mapped in an identical manner and everything works. it appears that the mapping for an 8x2 is causing an issue????

Wayne
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Jun 24, 2007 1:09 pm     Reply with quote
Post the part number of the PowerTip LCD. I'll look at the memory
map in the data sheet.

In this post, I test several 8x2 LCDs with the "Flex" driver and they
all work.
http://www.ccsinfo.com/forum/viewtopic.php?t=29819&start=3

Flex driver:
http://www.ccsinfo.com/forum/viewtopic.php?t=24661
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