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/* This is the LCDproc driver for Cwlinux devices (http://www.cwlinux.com)
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/** \file server/drivers/CwLnx.c
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* LCDd \c CwLnx driver for CwLinux devices (http://www.cwlinux.com).
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Applicable Data Sheets:
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/* Applicable Data Sheets:
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- http://www.cwlinux.com/downloads/cw1602/cw1602-manual.pdf
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- http://www.cwlinux.com/downloads/lcd/cw12232-manual.pdf
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Copyright (C) 2002, Andrew Ip
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2006,7,8 Peter Marschall
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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static void CwLnx_linewrap(int fd, int on);
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static void CwLnx_autoscroll(int fd, int on);
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static void CwLnx_hidecursor(int fd);
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static void CwLnx_set_char_unrestricted(Driver *drvthis, int n, unsigned char *dat);
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#define LCD_CMD 254
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#define LCD_LIGHT_OFF 70
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#define LCD_LIGHT_BRIGHTNESS 65
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#define LCD_CLEAR 88
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#define LCD_SET_INSERT 71
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#define LCD_INIT_INSERT 72
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#define LCD_SET_INSERT 71 /* go to X,Y */
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#define LCD_INIT_INSERT 72 /* go to home */
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#define LCD_SET_BAUD 57
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#define LCD_ENABLE_WRAP 67
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#define LCD_DISABLE_WRAP 68
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#define LCD_SETCHAR 78
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#define LCD_ENABLE_SCROLL 81
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#define LCD_DISABLE_SCROLL 82
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#define LCD_OFF_CURSOR 72
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#define LCD_SOFT_RESET 86
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#define LCD_OFF_CURSOR 72 /* is this correct? */
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#define LCD_UNDERLINE_CURSOR_ON 74 /* set cursor on at X,Y */
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#define LCD_UNDERLINE_CURSOR_OFF 75
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#define LCD_MOVE_CURSOR_LEFT 76
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#define LCD_MOVE_CURSOR_RIGHT 77
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#define LCD_INVERSE_TEXT_ON 102
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#define LCD_INVERSE_TEXT_OFF 103
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#define LCD_PUT_PIXEL 112
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#define LCD_CLEAR_PIXEL 113
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#define DELAY 2000 /* 2 milli sec */
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#define UPDATE_DELAY 0 /* 1 imicro sec */
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#define SETUP_DELAY 1 /* 2 micro sec */
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#define UPDATE_DELAY 20000 /* 20 milliseconds */
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#define SETUP_DELAY 20000 /* 20 milliseconds */
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#define MOVE_COST 5 /* # bytes for most move-to ops */
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static int Write_LCD(int fd, char *c, int size)
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int retries = 30;
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rc = write(fd, c, size);
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} else if (rc == 0 || (rc < 0 && errno == EAGAIN)) { /* would have blocked */
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} while (size > 0 && --retries > 0);
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} while (--retries > 0);
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MODULE_EXPORT int
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CwLnx_init(Driver *drvthis)
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struct termios portset_save;
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char device[200] = DEFAULT_DEVICE;
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int speed = DEFAULT_SPEED;
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char size[200] = DEFAULT_SIZE;
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/* Read config file */
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/* Which model is it (1602 or 12232)? */
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/* Which model is it (1602, 12232 or 12832)? */
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tmp = drvthis->config_get_int(drvthis->name, "Model", 0, 12232);
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debug(RPT_INFO, "%s: Model (in config) is '%d'", __FUNCTION__, tmp);
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if ((tmp != 1602) && (tmp != 12232)) {
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if ((tmp != 1602) && (tmp != 12232) && (tmp != 12832)) {
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report(RPT_WARNING, "%s: Model must be 12232 or 1602; using default %d",
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report(RPT_WARNING, "%s: Model must be 12232, 12832 or 1602; using default %d",
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drvthis->name, tmp);
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default_speed = DEFAULT_SPEED_12232;
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p->cellwidth = DEFAULT_CELL_WIDTH_12232;
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p->cellheight = DEFAULT_CELL_HEIGHT_12232;
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} else if (p->model == 12832) {
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default_size = DEFAULT_SIZE_12832;
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default_speed = DEFAULT_SPEED_12832;
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p->cellwidth = DEFAULT_CELL_WIDTH_12832;
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p->cellheight = DEFAULT_CELL_HEIGHT_12832;
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/* Which device should be used */
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report(RPT_INFO, "%s: opened display on %s", drvthis->name, device);
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Since we don't know what speed the display is using when
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we first connect to it, configure the port for the speed
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we don't want to use, send a command to switch the display
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to the speed we want to use, and flush the command.
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Init_Port(p->fd);
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tcgetattr(p->fd, &portset_save);
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Setup_Port(p->fd, speed);
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if (speed == B9600) {
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Setup_Port(p->fd, B19200);
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p->fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
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report(RPT_ERR, "%s: open(%s) failed (%s)", drvthis->name, device, strerror(errno));
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Setup_Port(p->fd, B9600);
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report(RPT_INFO, "%s: opened display on %s", drvthis->name, device);
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Init_Port(p->fd);
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Setup_Port(p->fd, speed);
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CwLnx_hidecursor(p->fd);
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CwLnx_linewrap(p->fd, 1);
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CwLnx_autoscroll(p->fd, 0);
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PrivateData *p = drvthis->private_data;
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int iUpdate = 0, jUpdate = 0;
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unsigned char *firstUpdate = NULL, *lastUpdate = NULL;
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unsigned char *q = p->framebuf;
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unsigned char *r = p->backingstore;
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for (i = 0; i < p->height; i++) {
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for (j = 0; j < p->width; j++) {
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if ((*q == *r) && !((0 < *q) && (*q < 16))) {
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/* Draw characters that have changed, as well
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* as custom characters. We know not if a custom
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* character has changed. */
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Set_Insert(p->fd, i, j);
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Write_LCD(p->fd, (char *) q, 1);
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if (firstUpdate && q - lastUpdate > MOVE_COST) {
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Set_Insert(p->fd, iUpdate, jUpdate);
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Write_LCD(p->fd, (char *) firstUpdate,
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lastUpdate - firstUpdate + 1);
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firstUpdate = lastUpdate = NULL;
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Set_Insert(p->fd, iUpdate, jUpdate);
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Write_LCD(p->fd, (char *) firstUpdate,
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lastUpdate - firstUpdate + 1);
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memcpy(p->backingstore, p->framebuf, p->width * p->height);
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if (p->backlight != p->saved_backlight ||
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p->brightness != p->saved_brightness) {
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Backlight_Brightness(p->fd, 1);
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Backlight_Brightness(p->fd, 1 + p->brightness * 6 / 900); /* 90% and up is full brightness */
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p->saved_backlight = p->backlight;
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p->saved_brightness = p->brightness;
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* Print a character on the screen at position (x,y).
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* The upper-left corner is (1,1), the lower-right corner is (p->width, p->height).
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for (i = 1; i <= p->cellwidth; i++) {
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// fill pixel columns from left to right.
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memset(hBar, 0xFF & ~((1 << (p->cellwidth - i)) - 1), sizeof(hBar));
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#if defined(SEAMLESS_HBARS)
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CwLnx_set_char_unrestricted(drvthis, i+1, hBar);
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CwLnx_set_char(drvthis, i+1, hBar);
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* Identical to CwLnx_set_char, but it doesn't restrict the 12232 to
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* using only 5 of its 6 columns. Full 6-column mode is required
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* for seamless H-bars.
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#if defined(SEAMLESS_HBARS)
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CwLnx_set_char_unrestricted(Driver *drvthis, int n, unsigned char *dat)
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PrivateData *p = drvthis->private_data;
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if ((n <= 0) || (n > CwLnx_get_free_chars(drvthis)))
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rc = Write_LCD(p->fd, &c, 1);
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rc = Write_LCD(p->fd, &c, 1);
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rc = Write_LCD(p->fd, &c, 1);
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if (p->model == 1602) { // the character model
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unsigned char mask = (1 << p->cellwidth) - 1;
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for (row = 0; row < p->cellheight; row++) {
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c = dat[row] & mask;
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Write_LCD(p->fd, &c, 1);
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} else if ((p->model == 12232) || (p->model == 12832)) { // graphical models
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for (col = p->cellwidth - 1; col >= 0; col--) {
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for (row = p->cellheight - 1; row >= 0; row--) {
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letter |= ((dat[row] >> col) & 1);
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Write_LCD(p->fd, &c, 1);
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rc = Write_LCD(p->fd, &c, 1);
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* Place an icon on the screen.
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* \param drvthis Pointer to driver structure.
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* \param x Horizontal character position (column).
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* \param y Vertical character position (row).
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* \param icon synbolic value representing the icon.
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* \return Information whether the icon is handled here or needs to be handled by the server core.
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* \retval 0 Icon has been successfully defined/written.
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* \retval <0 Server core shall define/write the icon.
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MODULE_EXPORT int
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CwLnx_icon(Driver *drvthis, int x, int y, int icon)
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* Get next key from the KeyRing.
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* Get key from the device.
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* \param drvthis Pointer to driver structure.
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* \return String representation of the key.
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* \return String representation of the key;
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* \c NULL if nothing available / unmapped key.
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MODULE_EXPORT const char *
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CwLnx_get_key(Driver *drvthis)
added
removed
server/drivers/CwLnx.c
