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lcdproc/server/drivers/sed1520.c
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//////////////////////////////////////////////////////////////////////////
// This is a driver for 122x32 pixel graphic displays based on the //
// SED1520 Controller connected to the parallel port. Check //
// www.adams-online.de/lcd for where to buy //
// and how to build the hardware. This Controller has no built in //
// character generator. Therefore all fonts and pixels are generated //
// by this driver. //
// //
// This driver is based on drv_base.c and hd44780.c. //
// The HD44780 font in sed1520fm.c was shamelessly stolen from //
// Michael Reinelt / lcd4linux and is (C) 2000 by him. //
// The rest of fontmap.c and this driver is //
// //
// Moved the delay timing code by Charles Steinkuehler to timing.h. //
// Guillaume Filion <gfk@logidac.com>, December 2001 //
// //
// (C) 2001 Robin Adams ( robin@adams-online.de ) //
// //
// This driver is released under the GPL. See file COPYING in this //
// package for further details. //
//////////////////////////////////////////////////////////////////////////
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <string.h>
#include <sys/errno.h>
#include <time.h>
#include "port.h"
#include "timing.h"
#define uPause timing_uPause
#include "sed1520fm.h"
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifndef LPTPORT
#define LPTPORT 0x378
#endif
#define A0 0x08
#define CS2 0x04
#define CS1 0x02
#define WR 0x01
#define IODELAY 500
#include "shared/str.h"
#include "lcd.h"
#include "sed1520.h"
#include "report.h"
static unsigned int port = LPTPORT;
static unsigned char *framebuf = NULL;
static int width = LCD_DEFAULT_WIDTH;
static int height = LCD_DEFAULT_HEIGHT;
static int cellwidth = LCD_DEFAULT_CELLWIDTH;
static int cellheight = LCD_DEFAULT_CELLHEIGHT;
// Vars for the server core
MODULE_EXPORT char *api_version = API_VERSION;
MODULE_EXPORT int stay_in_foreground = 0;
MODULE_EXPORT int supports_multiple = 0;
MODULE_EXPORT char *symbol_prefix = "sed1520_";
/////////////////////////////////////////////////////////////////
// writes command value to one or both sed1520 selected by chip
//
void
writecommand (unsigned int port, int value, int chip)
{
port_out(port, value);
port_out(port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
port_out(port + 2, CS1 - (chip & CS1) + (chip & CS2));
uPause(IODELAY);
port_out(port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
uPause(IODELAY);
}
/////////////////////////////////////////////////////////////////
// writes data value to one or both sed 1520 selected by chip
//
void
writedata (unsigned int port, int value, int chip)
{
port_out(port, value);
port_out(port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
port_out(port + 2, A0 + CS1 - (chip & CS1) + (chip & CS2));
uPause(IODELAY);
port_out(port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
uPause(IODELAY);
}
/////////////////////////////////////////////////////////////////
// selects a page (=row) on both sed1520s
//
void
selectpage (unsigned int port, int page)
{
writecommand(port, 0xB8 + (page & 0x03), CS1 + CS2);
}
/////////////////////////////////////////////////////////////////
// selects a column on the sed1520s specified by chip
//
void
selectcolumn (unsigned int port, int column, int chip)
{
writecommand(port, (column & 0x7F), chip);
}
/////////////////////////////////////////////////////////////////
// draws char z from fontmap to the framebuffer at position
// x,y. These are zero-based textmode positions.
// The Fontmap is stored in rows while the framebuffer is stored
// in columns, so we need a little conversion.
//
void
drawchar2fb (unsigned char *framebuf, int x, int y, unsigned char z)
{
int i, j;
if ((x < 0) || (x > 19) || (y < 0) || (y > 3))
return;
for (i = 6; i > 0; i--) {
int k = 0;
for (j = 0; j < 7; j++) {
k += (((fontmap[(int) z][j] * 2) & (1 << i)) / (1 << i)) *
(1 << j);
}
framebuf[(y * 122) + (x * 6) + (6 - i)] = k;
}
}
/////////////////////////////////////////////////////////////////
// This initialises the stuff. We support supplying port as
// a command line argument.
//
MODULE_EXPORT int
sed1520_init (Driver *drvthis)
{
/* Read config file */
/* What port to use */
port = drvthis->config_get_int(drvthis->name, "Port", 0, LPTPORT);
/* End of config file parsing */
if (timing_init() == -1) {
report(RPT_ERR, "%s: timing_init() failed (%s)", drvthis->name, strerror(errno));
return -1;
}
// Allocate our framebuffer
framebuf = (unsigned char *) calloc(122 * 4, sizeof(unsigned char));
if (framebuf == NULL) {
report(RPT_ERR, "%s: unable to allocate framebuffer", drvthis->name);
// sed1520_close ();
return -1;
}
// clear screen
memset (framebuf, '\0', 122 * 4);
// Initialize the Port and the sed1520s
if (port_access(port) || port_access(port+2)) {
report(RPT_ERR, "%s: unable to access port 0x%03X", drvthis->name, port);
return -1;
}
port_out(port,0);
port_out(port +2, WR + CS2);
writecommand(port, 0xE2, CS1 + CS2);
writecommand(port, 0xAF, CS1 + CS2);
writecommand(port, 0xC0, CS1 + CS2);
selectpage(port, 3);
cellwidth = 6;
cellheight = 8;
report(RPT_DEBUG, "%s: init() done", drvthis->name);
return 0;
}
/////////////////////////////////////////////////////////////////
// Frees the frambuffer and exits the driver.
//
MODULE_EXPORT void
sed1520_close (Driver *drvthis)
{
if (framebuf != NULL)
free(framebuf);
framebuf = NULL;
}
/////////////////////////////////////////////////////////////////
// Returns the display width
//
MODULE_EXPORT int
sed1520_width (Driver *drvthis)
{
return width;
}
/////////////////////////////////////////////////////////////////
// Returns the display height
//
MODULE_EXPORT int
sed1520_height (Driver *drvthis)
{
return height;
}
/////////////////////////////////////////////////////////////////
// Returns the display width
//
MODULE_EXPORT int
sed1520_cellwidth (Driver *drvthis)
{
return cellwidth;
}
/////////////////////////////////////////////////////////////////
// Returns the display height
//
MODULE_EXPORT int
sed1520_cellheight (Driver *drvthis)
{
return cellheight;
}
/////////////////////////////////////////////////////////////////
// Clears the LCD screen
//
MODULE_EXPORT void
sed1520_clear (Driver *drvthis)
{
memset(framebuf, 0, 488);
}
/////////////////////////////////////////////////////////////////
//
// Flushes all output to the lcd...
//
MODULE_EXPORT void
sed1520_flush (Driver *drvthis)
{
int i, j;
for (i = 0; i < 4; i++) {
selectpage(port, i);
selectcolumn(port, 0, CS2) ;
for (j = 0; j < 61; j++)
writedata(port, framebuf[j + (i * 122)], CS2);
selectcolumn(port, 0, CS1) ;
for (j = 61; j < 122; j++)
writedata(port, framebuf[j + (i * 122)], CS1);
}
}
/////////////////////////////////////////////////////////////////
// Prints a string on the lc display, at position (x,y). The
// upper-left is (1,1), and the lower right should be (20,4).
//
MODULE_EXPORT void
sed1520_string (Driver *drvthis, int x, int y, char string[])
{
int i;
x--; // Convert 1-based coords to 0-based
y--;
for (i = 0; string[i] != '\0'; i++)
drawchar2fb(framebuf, x + i, y, string[i]);
}
/////////////////////////////////////////////////////////////////
// Writes char c at position x,y into the framebuffer.
// x and y are 1-based textmode coordinates.
//
MODULE_EXPORT void
sed1520_chr (Driver *drvthis, int x, int y, char c)
{
y--;
x--;
drawchar2fb(framebuf, x, y, c);
}
/////////////////////////////////////////////////////////////////
// This function draws a number num into the last 3 rows of the
// framebuffer at 1-based position x. It should draw a 4-row font,
// but methinks this would look a little stretched. When
// num=10 a colon is drawn.
// FIXME: make big numbers use less memory
//
MODULE_EXPORT void
sed1520_num (Driver *drvthis, int x, int num)
{
int z, c, i, s;
x--;
if ((x < 0) || (x > 19) || (num < 0) || (num > 10))
return;
if (num != 10 && (x < 0 || x > 17))
return;
if (num == 10 && (x < 0 || x > 19))
return;
if (num == 10) { // Doppelpunkt
for (z = 0; z < 3; z++) { // Zeilen a 8 Punkte
for (c = 0; c < 6; c++) { // 6 Spalten
s = 0;
for (i = 0; i < 8; i++) { // 8 bits aus zeilen
s >>= 1;
if (*(fontbigdp[(z * 8) + i] + c) == '.')
s += 128;
}
framebuf[(z * 122) + 122 + (x * 6) + c] = s;
}
}
}
else {
for (z = 0; z < 3; z++) { // Zeilen a 8 Punkte
for (c = 0; c < 18; c++) { // 18 Spalten
s = 0;
for (i = 0; i < 8; i++) { // 8 bits aus zeilen
s >>= 1;
if (*(fontbignum[num][z * 8 + i] + c) == '.')
s += 128;
}
framebuf[(z * 122) + 122 + (x * 6) + c] = s;
}
}
}
}
/////////////////////////////////////////////////////////////////
// Changes the font of character n to a pattern given by *dat.
// HD44780 Controllers only posses 8 programmable chars. But
// we store the fontmap completely in RAM, so every character
// can be altered. !Important: Characters have to be redraw
// by drawchar2fb() to show their new shape. Because we use
// a non-standard 6x8 font a *dat not calculated from
// widthth and sed1520->height will fail.
//
MODULE_EXPORT void
sed1520_set_char (Driver *drvthis, int n, char *dat)
{
int row, col, i;
if (n < 0 || n > 255)
return;
if (!dat)
return;
for (row = 0; row < 8; row++) {
i = 0;
for (col = 0; col < 6; col++) {
i <<= 1;
i |= (dat[(row * 6) + col] > 0);
}
fontmap[n][row] = i;
}
}
/////////////////////////////////////////////////////////////////
// Draws a vertical from the bottom up to the last 3 rows of the
// framebuffer at 1-based position x. len is given in pixels.
//
MODULE_EXPORT void
sed1520_old_vbar (Driver *drvthis, int x, int len)
{
int i, j, k;
x--;
for (j = 0; j < 3; j++) {
k = 0;
for (i = 0; i < 8; i++) {
if (len > i)
k += 1 << (7 - i);
}
framebuf[((3 - j) * 122) + (x * 6)] = 0;
framebuf[((3 - j) * 122) + (x * 6) + 1] = 0;
framebuf[((3 - j) * 122) + (x * 6) + 2] = k;
framebuf[((3 - j) * 122) + (x * 6) + 3] = k;
framebuf[((3 - j) * 122) + (x * 6) + 4] = k;
framebuf[((3 - j) * 122) + (x * 6) + 5] = 0;
len -= 8;
}
}
/////////////////////////////////////////////////////////////////
// Draws a horizontal bar from left to right at 1-based position
// x,y into the framebuffer. len is given in pixels.
//
MODULE_EXPORT void
sed1520_old_hbar (Driver *drvthis, int x, int y, int len)
{
int i;
x--;
y--;
if ((y < 0) || (y > 3) || (x < 0) || (len < 0) || ((x + (len / 6)) > 19))
return;
for (i = 0; i < len; i++)
framebuf[(y * 122) + (x * 6) + i] = 0x3C;
}
/////////////////////////////////////////////////////////////////
// Reprogrammes character dest to contain an icon given by
// which. Calls set_char() to do this.
//
MODULE_EXPORT int
sed1520_icon (Driver *drvthis, int x, int y, int icon)
{
static char heart_open[] = {
1, 1, 1, 1, 1,
1, 0, 1, 0, 1,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
1, 0, 0, 0, 1,
1, 1, 0, 1, 1,
1, 1, 1, 1, 1 };
static char heart_filled[] = {
1, 1, 1, 1, 1,
1, 0, 1, 0, 1,
0, 1, 0, 1, 0,
0, 1, 1, 1, 0,
0, 1, 1, 1, 0,
1, 0, 1, 0, 1,
1, 1, 0, 1, 1,
1, 1, 1, 1, 1 };
switch (icon) {
case ICON_BLOCK_FILLED:
sed1520_chr(drvthis, x, y, 255);
break;
case ICON_HEART_FILLED:
sed1520_set_char(drvthis, 0, heart_filled);
sed1520_chr(drvthis, x, y, 0);
break;
case ICON_HEART_OPEN:
sed1520_set_char(drvthis, 0, heart_open);
sed1520_chr(drvthis, x, y, 0);
break;
default:
return -1;
}
return 0;
}
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