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JulsPower
Joined: 18 Feb 2008
Posts: 11
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 Posted: Wed Feb 20, 2008 8:24 pm |
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still dont work :(
I also tried to put an external power supply
also trying to not use rw and put it to ground(i commented the define in the driver) |
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JulsPower
Joined: 18 Feb 2008
Posts: 11
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| Posted: Thu Feb 21, 2008 8:39 pm |
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ok again
I rewired the lcd
i have put a connector to it so now no long wire its right there on the bread board
I also put the delay cycle to 2 because im running at 8mhz
but still doesn t work
/ | Code: | *
Fichier:Encoder.c
Date: 7 FEV 2008
Auteur: Julien Gingras
Revision: 1.0
Compilation:
Compilateur: CCS
Version: 3.5.0.92
Librairies:
*/
/* ***** LISTE DES INCLUDES ***** */
#CASE // Met le compilateur CASE SENSITIVE
#include <18F1220.h> // Fichier correspondant à notre PIC
#fuses INTRC_IO, NOPUT, NOBROWNOUT, NOWDT, NOCPD, NOWRTD, NOWRTC, NOEBTR, NOEBTRB, NOPROTECT, NOCPB, NOWRTB, NOLVP
#use delay(clock=8000000) // Fixer la vitesse de l'horloge
// Permet d'utiliser delay_ms() et delay_us()
#use standard_io(A)
#use standard_io(B)
#include "Flex_LCD420.c" //LCD driver
/* **** LISTE DES CONSTANTES ***** */
#define RC5_INPUT PIN_A7
//we can t use B6 and B7 because they are use by ICD2
/* **** LISTE DES VARIABLES GLOBALES ***** */
/* ***** LISTE DES PROTOTYPES ***** */
void main(void);
void InitPic(void);
/* ***** PROGRAMME PRINCPAL ***** */
void main(void)
{
char nData;
//InitPic();
delay_ms(500);
lcd_init();
printf(lcd_putc, "\fThis is the 1st line");
delay_ms(2000);
while(1)
{
output_toggle(PIN_A4);
delay_ms(100);
}
}
/**********************************************************************************
Nothing to yet
Port are set automaticly
We set a timer for the RC5
***********************************************************************************/
void InitPic(void)
{
setup_adc(ADC_OFF);
//Set timer 0 in 16 bit to count the uS between input
// setup_timer_0(RTCC_INTERNAL|RTCC_DIV_8);
// set_timer0(0);
}
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its a 4x16 it work the same way a 4x20 right??
can anyone help me
PCM helped me alot but still failing to make it work
ps this is a third lcd (i can get them free at job to do some test) |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Feb 21, 2008 11:43 pm |
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| Quote: | | its a 4x16 it work the same way a 4x20 right?? |
The 4x16 LCD may have different starting addresses for the rows.
You never posted the manufacturer and part number so I can't help. |
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JulsPower
Joined: 18 Feb 2008
Posts: 11
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| Posted: Fri Feb 22, 2008 5:34 am |
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ok but the first row is always 0x00?
optrex
dmc16443 |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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esa
Joined: 31 Jan 2008
Posts: 19
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| Posted: Fri Feb 22, 2008 3:01 pm |
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Dear Julien,
you can also check here for a good explanation :
http://ouwehand.net/~peter/lcd/lcd.shtml
Normally, for a 4x16 character, you must see after power up ( and contrast adjustment ):
- LINE 1 with filling black square
- LINE 2 blank
- LINE 3 with filling black square
- LINE 4 blank
Then , you must initialize the LCD and you got a 4 x blank LINE :
This is for a 4 bits interface :
| Code: |
write4(LCD1,CONFIG,FCT_SET+HEIGHT_BITS,5);
write4(LCD1,CONFIG,FCT_SET+HEIGHT_BITS,5);
write4(LCD1,CONFIG,FCT_SET+HEIGHT_BITS,5);
write4(LCD1,CONFIG,FCT_SET+FOUR_BITS,5);
write8(LCD1,CONFIG,SET_LCD+TWO_LINES,DELAY_2);
write8(LCD1,CONFIG,CURSOR+RIGHT,DELAY_2);
write8(LCD1,CONFIG,CLEAR,DELAY_2);
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| Code: |
#define write_lcd(en1,en2,rw,rs,data) output_d((data)|((en2)<<7)|((en1)<<6)|((rw)<<4)|((rs)<<5))
void write4(int lcd ,int rs,int data, int ms)//RS=0 => Config
{
write_lcd(0,0,WRITELCD,rs,data);
if (lcd==1) write_lcd(1,0,WRITELCD,rs,data); //Active Ligne E1
if (lcd==2) write_lcd(0,1,WRITELCD,rs,data); //Active Ligne E2
write_lcd(0,0,WRITELCD,rs,data); //Desactive Ligne E1 ou E2
delay_ms(ms);
}
void write8(int lcd, int rs,int data, int ms)
{
if(lcd==1) write_lcd(1,0,WRITELCD,rs,(data&0xF0)>>4);
if(lcd==2) write_lcd(0,1,WRITELCD,rs,(data&0xF0)>>4);
write_lcd(0,0,WRITELCD,rs,(data&0xF0)>>4);
if(lcd==1) write_lcd(1,0,WRITELCD,rs,(data&0x0F));
if(lcd==2) write_lcd(0,1,WRITELCD,rs,(data&0x0F));
write_lcd(0,0,WRITELCD,rs,(data&0x0F));
delay_ms(ms);
}
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| Code: |
#define READLCD 1
#define WRITELCD 0
#define LCD1 1
#define LCD2 2
#define DELAY 1
#define DELAY_2 2
#define CONFIG 0
#define PRINT 1
//------DISPLAY CLEAR---
#define CLEAR 0x01
//------CURSEUR HOME----
#define HOME 0x02
//------CURSEUR---------
#define CURSOR 0x04
#define RIGHT 0x02
#define LEFT 0x00
//------DISPLAY---------
#define DISPLAYCTRL 0x08
#define DISPLAY_ON 0x04
#define CURSOR_ON 0x02
#define BLINK_ON 0x01
#define CURSOR_OFF 0x00
#define BLINK_OFF 0x00
#define DISPLAY_OFF 0x00
//----CONFIGURATION-----
#define FCT_SET 0x02
#define SET_LCD 0x20
#define HEIGHT_BITS 0x01
#define FOUR_BITS 0x00
#define TWO_LINES 0x08
//-----DD RAM ----------
#define DD_RAM 0x80
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To Print on LCD
| Code: |
void lcd(char *chaine,int8 lcdselect)
{
while(*chaine != 0)
{
write8(lcdselect,PRINT,*chaine,DELAY);
chaine++;
};
}
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Eric |
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JulsPower
Joined: 18 Feb 2008
Posts: 11
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| Posted: Tue Feb 26, 2008 9:18 pm |
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Hi again guys
it does work with my code and the flex driver but with a unitech uc-162A
put I have to put 0V for contrast to see it at a good contrast
a little more with the flex driver (i got no idea why)
seem all the lcd from my job are too old and failed :D ill test them all I think
thanks for your help if I need any more help on this ill post again |
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JulsPower
Joined: 18 Feb 2008
Posts: 11
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| Posted: Thu Feb 28, 2008 11:55 am |
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i actually made the 16x4 lcd to work.
i have to put -5 V to the contrast source |
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