Hello, I am writing a program (using SDCC) for the pic16f887, it is driving a Hitachi HD44780 character LCD. In the code I am trying to write characters to the LCD. First: directly 1 character at a time and then Second: using what is essentially the puts function (void puts_lcd(char *s)). The puts function fails to send anything more than the first character. What am I doing wrong ? or is it a compiler error ? relevant files are attached. Thanks ...
>void puts_lcd (char *s)
>{
> REG_SEL=1;
>
> while (*s)
> {
> lcd_command(*s++);
> }
>
> REG_SEL=0;
>}
--
Jason White
/** 16x2 Hitachi LCD Driver Program
**
** Processor PIC16F887 @ 8 MHz
** SDCC Compiler
**
** Author Jason White
** Copyright (c) 2010 Jason White <White Waters Software>
** whitewaterssoftwarei...@gmail.com
**/
/* ----------------------------------------------------------------------- */
/* Definitions */
#include <pic16f887.h>
#include <stdlib.h>
/* ----------------------------------------------------------------------- */
/* Configuration */
typedef unsigned int word;
word at _CONFIG1 CONFIG1 = _INTRC_OSC_NOCLKOUT & _WDT_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOR_ON & _IESO_OFF & _FCMEN_OFF & _LVP_OFF & _DEBUG_OFF;
word at _CONFIG2 CONFIG2 = _BOR40V & _WRT_OFF;
/* ----------------------------------------------------------------------- */
/* Interrupt Routine */
void isr() interrupt 0
{
}
/* ----------------------------------------------------------------------- */
/* Global Vars */
long i=0;
char j=0;
/* ----------------------------------------------------------------------- */
/* Function Pre-Definitions */
/* ----------------------------------------------------------------------- */
/* Main Code */
void wait(long time)
{
for(i=0;i<time;i++)
{
__asm
clrwdt
; Delay = 0.0001 seconds
; Clock frequency = 8 MHz
; Actual delay = 0.0001 seconds = 200 cycles
; Error = 0 %
cblock
d1
endc
;199 cycles
movlw 0x42
movwf d1
decfsz d1, f
goto $-1
;1 cycle
nop
__endasm;
}
}
void wdt()
{
__asm
clrwdt
__endasm;
}
#define CLOCK RC7
#define READ RD6
#define REG_SEL RD5
#define LED RD2
void lcd_command(char cmd)
{
CLOCK=0;
PORTB=cmd;//j;
wait(100);//.01 seconds
CLOCK=1;
wait(100);//.01 seconds
CLOCK=0;
}
void puts_lcd (char *s)
{
REG_SEL=1;
while (*s)
{
lcd_command(*s++);
}
REG_SEL=0;
}
void main()
{
int counter=0;
wdt();
IRCF0=1;
IRCF1=1;
IRCF2=1;
PORTA=0;
PORTB=0;
PORTC=0;
PORTD=0;
PORTE=0;
TRISA=0x1F;
TRISB=0;
TRISC=0;
TRISD=0;
TRISE=0;
ANSEL=0;
ANSELH=0;
LED=1;
wait(1000);//.1 seconds
LED=0;
wait(1000);//.1 seconds
lcd_command(0x38); //Function Set
lcd_command(0x0F); //Display On
lcd_command(0x06); //Entry Mode Set
lcd_command(0x01); //Clear Display
REG_SEL=1;
lcd_command('F');
lcd_command('o');
lcd_command('o');
lcd_command('b');
lcd_command('a');
lcd_command('r');
lcd_command(' ');
lcd_command('!');
REG_SEL=0;
puts_lcd("~Hello");
while (1)
{
LED=1;
wait(1000);//1 second
LED=0;
wait(1000);//1 second
}
}
887-lcd-test.cod
Description: application/vnd.rim.cod
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