/* $Id: drv_SimpleLCD.c,v 1.6 2005/08/22 05:44:43 reinelt Exp $ * * driver for a simple serial terminal. * * Copyright (C) 2005 Julien Aube * Copyright (C) 2005 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux 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. * * LCD4Linux 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: drv_SimpleLCD.c,v $ * Revision 1.6 2005/08/22 05:44:43 reinelt * new driver 'WincorNixdorf' * some fixes to the bar code * * Revision 1.5 2005/07/06 04:40:18 reinelt * GCC-4 fixes * * Revision 1.4 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.3 2005/04/20 05:49:21 reinelt * Changed the code to add some VT100-compatible control sequences (see the comments above). * A configfile boolean option 'VT100_Support' (default to 1) indicate if the display in * used support these control-sequences or not. * * Revision 1.2 2005/04/02 05:28:58 reinelt * fixed gcc4 warnings about signed/unsigned mismatches * * Revision 1.1 2005/02/24 07:06:48 reinelt * SimpleLCD driver added * */ /* * This driver simply send out caracters on the serial port, without any * formatting instructions for a particular LCD device. * This is useful for custom boards of for very simple LCD. * * I use it for tests on a custom-made board based on a AVR microcontroler * and also for driver a Point-of-Sale text-only display. * I assume the following : * - CR (0x0d) Return to the begining of the line without erasing, * - LF (0x0a) Initiate a new line (but without sending the cursor to * the begining of the line) * - BS (0x08) Move the cursor to the previous caracter (but does no erase it). * - It's not possible to return to the first line. Thus a back buffer is used * in this driver. * * ******** UPDATE ********* * I have added a "VT-100 Compatible mode" that allows the driver to support * control-sequence code. This greatly reduce flickering and eliminate the need * for the back-buffer. But it is optional since all displays cannot support them. * Here are the codes: * Delete the display (but does not move the cursor) : * "ESC [ 2 J" (0x1b 0x5b 0x32 0x4a) * Position the cursor : * "ESC [ YY ; XX H" ( 0x1b 0x5b YY 0x3b XX 0x48 ) where YY is the ascii for the line * number, and XX is the ascii for the column number ( first line/column is '1', not zero) * Delete to the end of line from current cursor position : * "ESC [ 0 K" ( 0x1b 0x5b 0x30 0x4b ) * Set Country Code : * "ESC R NN" (0x1b 0x52 NN) where NN is the country code *in byte, NOT ascii*. * The default is 0 (USA), see below for specific countries. * the list of accessible characters page are available on this page : * http://www.wincor-nixdorf.com/internet/com/Services/Support/TechnicalSupport/POSSystems * /Manuals/BAxx/index.html * Get the display identification : (Doesn't work reliably, timing issues here) * "ESC [ 0 c" ( 0x1b 0x5b 0x30 0x63). Return a string which look like this : * ESC [ ? M ; NN ; OO ; PP ; QQ c) where M is type of display (2 for VFD), * NN is the rom version, 00 is the current caracter set, PP is the number of lines and * QQ the number of colomns. * * * A "bar" capability is now provided if the config file has a "BarCharValue" parameter in it. * * The code come mostly taken from the LCDTerm driver in LCD4Linux, from * Michaels Reinelt, many thanks to him. * * This driver is released under the GPL. */ /* * * exported fuctions: * * struct DRIVER drv_SimpleLCD * */ #include "config.h" #include #include #include #include "debug.h" #include "cfg.h" #include "qprintf.h" #include "plugin.h" #include "widget.h" #include "widget_text.h" #include "widget_icon.h" #include "widget_bar.h" #include "drv.h" #include "drv_generic_text.h" #include "drv_generic_serial.h" static char Name[] = "SimpleLCD"; static char *backbuffer = 0; static int backbuffer_size = 0; static int vt100_mode = 0; static unsigned char bar_char = 0; /****************************************/ /*** hardware dependant functions ***/ /****************************************/ /** No clear function on SimpleLCD : Just send CR-LF * number of lines **/ static void drv_SL_simple_clear(void) { char cmd[2]; int i; cmd[0] = '\r'; cmd[1] = '\n'; for (i = 0; i < DROWS; ++i) { drv_generic_serial_write(cmd, 2); } memset(backbuffer, ' ', backbuffer_size); } /** vt-100 mode : send the ESC-code **/ static void drv_SL_vt100_clear(void) { char cmd[4]; cmd[0] = 0x1b; cmd[1] = '['; cmd[2] = '2'; cmd[3] = 'J'; drv_generic_serial_write(cmd, 4); } static void drv_SL_clear(void) { vt100_mode == 1 ? drv_SL_vt100_clear() : drv_SL_simple_clear(); } /* If full_commit = true, then the whole buffer is to be sent to screen. if full_commit = false, then only the last line is to be sent (faster on slow screens) */ static void drv_SL_commit(int full_commit) { int row; char cmd[2] = { '\r', '\n' }; if (full_commit) { for (row = 0; row < DROWS; row++) { drv_generic_serial_write(cmd, 2); drv_generic_serial_write(backbuffer + (DCOLS * row), DCOLS); } } else { drv_generic_serial_write(cmd, 1); /* Go to the beginning of the line only */ drv_generic_serial_write(backbuffer + (DCOLS * (DROWS - 1)), DCOLS); } } static void drv_SL_simple_write(const int row, const int col, const char *data, int len) { memcpy(backbuffer + (row * DCOLS) + col, data, len); if (row == DROWS - 1) drv_SL_commit(0); else drv_SL_commit(1); } static void drv_SL_vt100_write(const int row, const int col, const char *data, int len) { char cmd[8]; cmd[0] = 0x1b; cmd[1] = '['; cmd[2] = row + '1'; cmd[3] = ';'; cmd[4] = (col / 10) + '0'; cmd[5] = (col % 10) + '1'; cmd[6] = 'H'; drv_generic_serial_write(cmd, 7); drv_generic_serial_write(data, len); } static int drv_SL_start(const char *section, const int quiet) { int rows = -1, cols = -1; int value; unsigned int flags = 0; char *s; char *model = 0; vt100_mode = 0; model = cfg_get(section, "Model", "generic"); if (model != NULL && *model != '\0') { if (strcasecmp("vt100", model) == 0) vt100_mode = 1; } cfg_number(section, "BarCharValue", 0, 0, 255, &value); bar_char = value; cfg_number(section, "Options", 0, 0, 0xffff, &value); flags = value; if (drv_generic_serial_open(section, Name, flags) < 0) return -1; s = cfg_get(section, "Size", NULL); if (s == NULL || *s == '\0') { error("%s: no '%s.Size' entry from %s", Name, section, cfg_source()); return -1; } if (sscanf(s, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); free(s); return -1; } DROWS = rows; DCOLS = cols; if (!vt100_mode) { backbuffer_size = DROWS * DCOLS; backbuffer = malloc(backbuffer_size); if (!backbuffer) { return -1; } } /* real worker functions */ if (vt100_mode) { drv_generic_text_real_write = drv_SL_vt100_write; } else { drv_generic_text_real_write = drv_SL_simple_write; } drv_SL_clear(); /* clear */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, NULL)) { sleep(3); drv_SL_clear(); } } return 0; } /****************************************/ /*** plugins ***/ /****************************************/ /* none */ /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_SL_list(void) { printf("generic vt100"); return 0; } /* initialize driver & display */ int drv_SL_init(const char *section, const int quiet) { WIDGET_CLASS wc; int ret; /* display preferences */ XRES = 5; /* pixel width of one char */ YRES = 8; /* pixel height of one char */ CHARS = 0; /* number of user-defineable characters */ CHAR0 = 0; /* ASCII of first user-defineable char */ GOTO_COST = -1; /* number of bytes a goto command requires */ /* start display */ if ((ret = drv_SL_start(section, quiet)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register plugins */ /* none */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 23:31:36 +0000
NULL); } drv_generic_serial_close(); if (backbuffer) { free(backbuffer); backbuffer = 0; backbuffer_size = 0; } return (0); } DRIVER drv_SimpleLCD = { name:Name, list:drv_SL_list, init:drv_SL_init, quit:drv_SL_quit, };