2 backlight example, Mopslcdlx software guide – Kontron MOPSlcdLX User Manual

Page 15

KTD-S0006-B

Page 12

Watchdog and Backlight

MOPSlcdLX Software Guide

4.2

Backlight Example

#include
#include
#include

#define JIDA16_INT

0x15

#define BACKL_OUT

0xEA29

#define BACKL_IN

0xEA28

#define JIDA_ID

0x4648

#define BOARD_NUM

void WriteBacklight (unsigned char value)
{

union REGS regs;

regs.x.ax = BACKL_OUT;

regs.x.dx = JIDA_ID;

regs.h.cl = BOARD_NUM;

regs.h.ch = value;

int86 (JIDA16_INT, ®s, ®s);

}

unsigned char ReadBacklight (void)
{

union REGS regs;

regs.x.ax = BACKL_IN;

regs.x.dx = JIDA_ID;

regs.h.cl = BOARD_NUM;

int86 (JIDA16_INT, ®s, ®s);

return

regs.h.ch;

}

void main (void)
{
unsigned

char

val;

char str [32];

WriteBacklight

(0x80);

val = ReadBacklight ();

sprintf (str, "\n%02X\n", val);

printf

(str);

}