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Problems with lcd_init()

 
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rfjhh



Joined: 31 Mar 2011
Posts: 51
Location: Mexico

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Problems with lcd_init()
PostPosted: Wed Feb 01, 2017 9:23 am     Reply with quote

I'm working with an LCD 2x16 with the following program:
Code:

#include <16f887.h>                   
#use delay (clock=8MHz)            //Fosc=8Mhz
#include <lcd.c> 
#use fast_io(C)                   
#define use_portd_lcd TRUE

void e()
{
   output_bit(PIN_D0,1);
   delay_ms(1);
   output_bit(PIN_D0,0);
}
 
void main()
{
   setup_oscillator(OSC_8MHZ|OSC_INTRC);  //We program Pic internal oscillator to 8 MHz
   set_tris_c(0xfe);
//   lcd_init();   
//****** Init sequence made by me (it works well)           
   output_d(0x00);
   output_d(0x20);
   e();
   output_d(0x00);
   e();
   output_d(0xf0);
   e();
// ****** end of Init sequence

   printf(lcd_putc, "Hola Mundo");
// **** Printing "H" for test
 /*  output_d(0x40|0x02);             
   e();
   output_d(0x80|0x02);             
   e();*/
   while(1)
   {
      delay_ms(10);                       // Wait for 10 ms
      output_toggle(PIN_B5);              // We blink Led, output_toggle changes the logical state of the last parameter pin
      delay_ms(250);                     // Wait for 250 ms
   }
}

If I enable lcd_init() (disabling my Init sequence), the program doesn't work. But, if I disable lcd_init() and I use my sequence, the string "Hola Mundo" is well displayed.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Feb 01, 2017 10:05 am     Reply with quote

Post the manufacturer and part number of your LCD.

Post a link to the website for the lcd.
rfjhh



Joined: 31 Mar 2011
Posts: 51
Location: Mexico

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PostPosted: Wed Feb 01, 2017 2:54 pm     Reply with quote

I'm simulating in Proteus. The LCD model works well if I perform Initialization and writing with debugging tools, step by step by assigning logic states manually.

The LCD is an standard one, nothing special. I don't know who the manufacturer is.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Feb 01, 2017 3:10 pm     Reply with quote

The lcd doesn't have a brand. It's the Proteus model. Someone made
that model. Where is the spec for that model ? I don't know.

Here, someone is writing code for a Proteus lcd model. He doesn't use
your init code. He uses the standard old Hitachi HD44780 init code.
http://www.theengineeringprojects.com/2015/12/interfacing-lcd-8051-microcontroller-proteus-isis.html

I guess your post is asking why do you have to use your init code instead
of the HD44780 code in lcd.c ? It must be something in your version of
Proteus that is different. We can't fix that on this forum. You should go
to the labcenter (proteus) forum and ask them.
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