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/*
* BRLTTY - A background process providing access to the Linux console (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2003 by The BRLTTY Team. All rights reserved.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation. Please see the file COPYING for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "Programs/misc.h"
#include "Programs/system.h"
#include "Programs/brl.h"
#include "braille.h"
#include "vblow.h"
#define LPTSTATUSPORT LPTPORT+1
#define LPTCONTROLPORT LPTPORT+2
static TranslationTable outputTable;
int vbinit() {
{
static const DotsTable dots = {0X01, 0X02, 0X04, 0X08, 0X10, 0X20, 0X40, 0X80};
makeOutputTable(&dots, &outputTable);
}
if (enablePorts(LOG_ERR, LPTPORT, 3)) {
if (enablePorts(LOG_ERR, 0X80, 1)) {
char alldots[40];
memset(alldots, 0XFF, 40);
vbdisplay(alldots);
return 0;
disablePorts(0X80, 1);
}
disablePorts(LPTPORT, 3);
}
LogPrint(LOG_ERR, "Error: must be superuser");
return -1;
}
void vbsleep(long x) {
int i;
for (i = 0; i<x; i++) writePort1(0x80, 1);
}
static void vbclockpause() {
int i;
for (i = 0; i<=VBCLOCK*100; i++) ;
}
void vbdisplay(char *vbBuf) {
int i,j;
char b;
for (j = 0; j<VBSIZE; j++) {
for (i = 7; i>=0; i--) {
b = (vbBuf[j] << i) & VBLPTDATA;
writePort1(LPTPORT, b);
vbclockpause();
writePort1(LPTPORT, b | VBLPTCLOCK);
vbclockpause();
}
}
writePort1(LPTPORT, b | VBLPTCLOCK);
for (i = 0; i<=7; i++) vbclockpause();
writePort1(LPTPORT, 0);
for (i = 0; i<=7; i++) vbclockpause();
writePort1(LPTPORT, VBLPTSTROBE);
for (i = 0; i<=7; i++) vbclockpause();
writePort1(LPTPORT, 0);
vbclockpause();
}
void vbtranslate(const unsigned char *vbBuf,unsigned char *vbDest,int size) {
int i;
for (i=0; i<size; i++) vbDest[i] = outputTable[vbBuf[i]];
}
void BrButtons(vbButtons *dest) {
char i;
dest->bigbuttons = 0;
dest->keypressed = 0;
for (i = 47; i>=40; i--) {
writePort1(LPTPORT, i);
vbsleep(VBDELAY);
if ((readPort1(LPTSTATUSPORT) & 0x08)==0) {
dest->bigbuttons |= (1 << (i-40));
dest->keypressed = 1;
}
}
dest->routingkey = 0;
for (i = 40; i>0; i--) {
writePort1(LPTPORT, i-1);
vbsleep(VBDELAY);
if ((readPort1(LPTSTATUSPORT) & 0x08)==0) {
dest->routingkey = i;
dest->keypressed = 1;
break;
}
}
}
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