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archived-lcd4linux/Cwlinux.c
reinelt e78718b21a [lcd4linux @ 2003-08-01 05:15:42 by reinelt] 
last cleanups for 0.9.9

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@205 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2003-08-01 05:15:42 +00:00

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/* $Id: Cwlinux.c,v 1.10 2003/08/01 05:15:42 reinelt Exp $
*
* driver for Cwlinux serial display modules
*
* Copyright 2002 by Andrew Ip (aip@cwlinux.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: Cwlinux.c,v $
* Revision 1.10 2003/08/01 05:15:42 reinelt
* last cleanups for 0.9.9
*
* Revision 1.9 2003/07/24 04:48:09 reinelt
* 'soft clear' needed for virtual rows
*
* Revision 1.8 2003/05/19 05:55:17 reinelt
* Cwlinux sleep optimization
*
* Revision 1.7 2003/05/14 06:17:39 reinelt
* added support for CW1602
*
* Revision 1.6 2003/02/24 04:50:57 reinelt
* cwlinux fixes
*
* Revision 1.5 2003/02/22 07:53:09 reinelt
* cfg_get(key,defval)
*
* Revision 1.4 2003/02/22 07:23:24 reinelt
* Cwlinux fixes
*
* Revision 1.3 2002/09/12 05:24:54 reinelt
* code cleanup, character defining for bars
*
* Revision 1.2 2002/09/11 05:32:35 reinelt
* changed to use new bar functions
*
* Revision 1.1 2002/09/11 05:16:32 reinelt
* added Cwlinux driver
*
*/
/*
*
* exported fuctions:
*
* struct LCD Cwlinux[]
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include "debug.h"
#include "cfg.h"
#include "lock.h"
#include "display.h"
#include "bar.h"
#define CHARS 8
static LCD Lcd;
static char *Port = NULL;
static speed_t Speed;
static int Device = -1;
static char Txt[4][20];
static int CW_open(void)
{
int fd;
pid_t pid;
struct termios portset;
if ((pid = lock_port(Port)) != 0) {
if (pid == -1)
error("Cwlinux: port %s could not be locked", Port);
else
error("Cwlinux: port %s is locked by process %d", Port, pid);
return -1;
}
fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
error("Cwlinux: open(%s) failed: %s", Port, strerror(errno));
unlock_port(Port);
return -1;
}
if (tcgetattr(fd, &portset) == -1) {
error("Cwlinux: tcgetattr(%s) failed: %s", Port, strerror(errno));
unlock_port(Port);
return -1;
}
cfmakeraw(&portset);
cfsetispeed(&portset, Speed);
cfsetospeed(&portset, Speed);
if (tcsetattr(fd, TCSANOW, &portset) == -1) {
error("Cwlinux: tcsetattr(%s) failed: %s", Port, strerror(errno));
unlock_port(Port);
return -1;
}
return fd;
}
static void CW_write(char *string, int len)
{
int ret;
ret=write (Device, string, len);
if (ret<0 && errno==EAGAIN) {
usleep(1000);
ret=write (Device, string, len);
}
if (ret<0) {
error ("Cwlinux: write(%s) failed: %s", Port, strerror(errno));
}
}
#if 0
static int CW_read(char *string, int len)
{
int ret;
ret=read (Device, string, len);
if (ret<0 && errno==EAGAIN) {
debug ("read(): EAGAIN");
usleep(10000);
ret=read (Device, string, len);
}
debug ("read(%s)=%d", string, ret);
if (ret<0) {
error("Cwlinux: read() failed: %s", strerror(errno));
}
usleep(20);
return ret;
}
#endif
static void CW_Goto(int row, int col)
{
char cmd[5]="\376Gxy\375";
cmd[2]=(char)col;
cmd[3]=(char)row;
CW_write(cmd,5);
}
static void CW12232_define_char (int ascii, char *buffer)
{
int i, j;
char cmd[10]="\376Nn123456\375";
cmd[2]=(char)(ascii+1);
// Cwlinux uses a vertical bitmap layout, so
// we have to kind of 'rotate' the bitmap.
for (i=0; i<6;i++) {
cmd[3+i]=0;
for (j=0; j<8;j++) {
if (buffer[j] & (1<<(5-i))) {
cmd[3+i]|=(1<<(7-j));
}
}
}
CW_write(cmd,10);
}
static void CW1602_define_char (int ascii, char *buffer)
{
int i;
char cmd[12]="\376Nn12345678\375";
cmd[2]=(char)(ascii+1);
for (i=0; i<8; i++) {
cmd[3+i]=buffer[i];
}
CW_write(cmd,12);
usleep(20); // delay for cw1602 to settle the character defined!
}
int CW_clear(int full)
{
int row, col;
for (row = 0; row < Lcd.rows; row++) {
for (col = 0; col < Lcd.cols; col++) {
Txt[row][col] = '\t';
}
}
bar_clear();
if (full) {
#if 0
CW_write("\376X\375",3);
#else
// for some mysterious reason, we have to sleep after
// the command _and_ after the CMD_END...
usleep(20);
CW_write("\376X",2);
usleep(20);
CW_write("\375",1);
usleep(20);
#endif
}
return 0;
}
static void CW_Brightness(void)
{
int level;
char cmd[5]="\376A_\375";
level=atoi(cfg_get("Brightness","8"));
if (level<0) level=0;
if (level>8) level=8;
switch (level) {
case 0:
// backlight off
CW_write ("\376F\375", 3);
break;
case 8:
// backlight on
CW_write ("\376B\375", 3);
break;
default:
// backlight level
cmd[2]=level;
CW_write (cmd, 4);
break;
}
}
int CW_init(LCD * Self)
{
char *port;
char *speed;
// char buffer[16];
Lcd = *Self;
if (Port) {
free(Port);
Port = NULL;
}
port = cfg_get("Port",NULL);
if (port == NULL || *port == '\0') {
error("Cwlinux: no 'Port' entry in %s", cfg_file());
return -1;
}
Port = strdup(port);
speed = cfg_get("Speed","19200");
switch (atoi(speed)) {
case 9600:
Speed = B9600;
break;
case 19200:
Speed = B19200;
break;
default:
error("Cwlinux: unsupported speed '%s' in %s", speed, cfg_file());
return -1;
}
debug("using port %s at %d baud", Port, atoi(speed));
Device = CW_open();
if (Device == -1)
return -1;
// this does not work as I'd expect it...
#if 0
// read firmware version
CW_read(buffer,sizeof(buffer));
usleep(100000);
CW_write ("\3761", 2);
usleep(100000);
CW_write ("\375", 1);
usleep(100000);
if (CW_read(buffer,2)!=2) {
info ("unable to read firmware version!");
}
info ("Cwlinux Firmware %d.%d", (int)buffer[0], (int)buffer[1]);
#endif
CW_clear(1);
// auto line wrap off
CW_write ("\376D\375", 3);
// auto scroll off
// CW_write ("\376R\375", 3);
// underline cursor off
CW_write ("\376K\375", 3);
// backlight on
CW_write ("\376B\375", 3);
// backlight brightness
CW_Brightness();
bar_init(Lcd.rows, Lcd.cols, Lcd.xres, Lcd.yres, CHARS);
bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
return 0;
}
int CW_put(int row, int col, char *text)
{
char *p = &Txt[row][col];
char *t = text;
while (*t && col++ <= Lcd.cols) {
*p++ = *t++;
}
return 0;
}
int CW_bar(int type, int row, int col, int max, int len1, int len2)
{
return bar_draw (type, row, col, max, len1, len2);
}
int CW_flush(void)
{
char buffer[256];
char *p;
int c, row, col;
for (row = 0; row < Lcd.rows; row++) {
for (col = 0; col < Lcd.cols; col++) {
c=bar_peek(row, col);
if (c!=-1) {
if (c!=32) c++; //blank
Txt[row][col]=(char)c;
}
}
for (col = 0; col < Lcd.cols; col++) {
if (Txt[row][col] == '\t')
continue;
CW_Goto(row, col);
for (p = buffer; col < Lcd.cols; col++, p++) {
if (Txt[row][col] == '\t')
break;
*p = Txt[row][col];
}
CW_write(buffer, p - buffer);
}
}
return 0;
}
int CW12232_flush(void)
{
bar_process(CW12232_define_char);
return CW_flush();
}
int CW1602_flush(void)
{
bar_process(CW1602_define_char);
return CW_flush();
}
int CW_quit(void)
{
debug("closing port %s", Port);
close(Device);
unlock_port(Port);
return (0);
}
LCD Cwlinux[] = {
{name: "CW12232",
rows: 4,
cols: 20,
xres: 6,
yres: 8,
bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
gpos: 0,
init: CW_init,
clear: CW_clear,
put: CW_put,
bar: CW_bar,
gpo: NULL,
flush: CW12232_flush,
quit: CW_quit
},
{name: "CW1602",
rows: 2,
cols: 16,
xres: 5,
yres: 8,
bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
gpos: 0,
init: CW_init,
clear: CW_clear,
put: CW_put,
bar: CW_bar,
gpo: NULL,
flush: CW1602_flush,
quit: CW_quit
},
{NULL}
};
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