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PIC16F913 / LCD pins

 
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pasini



Joined: 12 Dec 2005
Posts: 50
Location: Curitiba - Brazil

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PIC16F913 / LCD pins
PostPosted: Wed Sep 24, 2008 8:24 am     Reply with quote
Hi,
I am using PIC16F913 as a LCD driver, with 3 commons and 15 segments. Some segments are working fine and I can see them on the LCD, but others are not working. Watching the oscilloscope, I noticed that pins 5=SEG15, 27=SEG14, 28=SEG13, 15=SEG11, 16=SEG10, 17=SEG9, 18=SEG8 and 24=SEG3 are not being output. Other segments are correct.

My configuration is:

Code:
void main()
{
int32 number;
   
setup_lcd(LCD_MUX13 | LCD_BIAS_PINS | USE_TIMER_1 | LCD_HALF_BIAS, 15);

number = 99999;
   
while(1)
{
lcd_putc('\f');
lcd_putc('0');
lcd_putc('0');
lcd_putc('0');
lcd_putc('0');
lcd_putc('0');
lcd_putc('0');
   
//printf(lcd_putc,"\f%6lu",number);   // Always send 6 digits
//   number++;
}


Do I need to change the setup ? How do I correctly set the pins to output LCD signals ?

I also use lcd_symbol(segments, DIGIT1); inside lcd_putc to display the numbers (this function is working fine).

The problem is really that the pins are not driving the LCD. Do I need to change CMCON0, ANSEL and other registers ? How do I do this ?

Thanks in advance,
Luiz
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Sep 24, 2008 8:51 am     Reply with quote
Read these topics, which explain how to use the CCS functions for
a segmented LCD:
http://www.ccsinfo.com/forum/viewtopic.php?t=35839
http://www.ccsinfo.com/forum/viewtopic.php?t=32774
http://www.ccsinfo.com/forum/viewtopic.php?t=33377
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