lcd4linux.git - lcd4linux

diff options

Diffstat (limited to '')

-rw-r--r--

1 files changed, 17 insertions, 1 deletions

/* $Id: drv_Trefon.c,v 1.6 2006/01/30 06:25:54 reinelt Exp $ * * driver for TREFON USB LCD displays - http://www.trefon.de * * Copyright (C) 2005 Michael Reinelt <reinelt@eunet.at> * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * 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_Trefon.c,v $ * Revision 1.6 2006/01/30 06:25:54 reinelt * added CVS Revision * * Revision 1.5 2005/08/21 08:18:56 reinelt * CrystalFontz ACK processing * * Revision 1.4 2005/08/20 10:10:13 reinelt * TREFON patch from Stephan Trautvetter: * drv_TF_init: CHAR0 set to 0 instead of 1 * drv_TF_write: combine the GOTO and the data into one packet * drv_TF_write: add GOTO-Case for resolutions 8x1/20x4 characters * drv_TF_start: test for existing resolutions from TREFON USB-LCDs implemented * the use of 'asc255bug 1' is recommendable * * Revision 1.3 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.2 2005/04/24 05:27:09 reinelt * Trefon Backlight added * * Revision 1.1 2005/04/24 04:33:46 reinelt * driver for TREFON USB LCD's added * */ /* * * exported fuctions: * * struct DRIVER drv_Trefon * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <termios.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/time.h> #include <usb.h> #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" #define LCD_USB_VENDOR 0xfff0 #define LCD_USB_DEVICE 0xfffe #define PKT_START 0x02 #define PKT_BACKLIGHT 0x01 #define PKT_DATA 0x02 #define PKT_CTRL 0x06 #define PKT_END 0xff static char Name[] = "TREFON"; static usb_dev_handle *lcd; static int interface; extern int usb_debug; extern int got_signal; /****************************************/ /*** hardware dependant functions ***/ /****************************************/ static int drv_TF_open(void) { struct usb_bus *busses, *bus; struct usb_device *dev; lcd = NULL; info("%s: scanning USB for TREFON LCD...", Name); usb_debug = 0; usb_init(); usb_find_busses(); usb_find_devices(); busses = usb_get_busses(); for (bus = busses; bus; bus = bus->next) { for (dev = bus->devices; dev; dev = dev->next) { if ((dev->descriptor.idVendor == LCD_USB_VENDOR) && (dev->descriptor.idProduct == LCD_USB_DEVICE)) { info("%s: found TREFON USB LCD on bus %s device %s", Name, bus->dirname, dev->filename); lcd = usb_open(dev); if (usb_set_configuration(lcd, 1) < 0) { error("%s: usb_set_configuration() failed!", Name); return -1; } interface = 0; if (usb_claim_interface(lcd, interface) < 0) { error("%s: usb_claim_interface() failed!", Name); return -1; } return 0; } } } return -1; } static int drv_TF_close(void) { usb_release_interface(lcd, interface); usb_close(lcd); return 0; } static void drv_TF_send(char *data, int size) { char buffer[64]; /* the controller always wants a 64-byte packet */ memset(buffer, 0, 64); memcpy(buffer, data, size); // Endpoint hardcoded to 2 usb_bulk_write(lcd, 2, buffer, 64, 2000); } static void drv_TF_command(const unsigned char cmd) { char buffer[4] = { PKT_START, PKT_CTRL, 0, PKT_END }; buffer[2] = cmd; drv_TF_send(buffer, 4); } static void drv_TF_clear(void) { drv_TF_command(0x01); } static void drv_TF_write(const int row, const int col, const char *data, const int len) { char buffer[64]; char *p; int pos = 0; if (DCOLS == 8 && DROWS == 1) { // 8x1 Characters pos = row * 0x40 + col; } else if (DCOLS == 16 && DROWS == 2) { // 16x2 Characters pos = row * 0x40 + col; } else if (DCOLS == 20 && DROWS == 4) { // 20x4 Characters pos = row * 0x20 + col; } else { error("%s: internal error: DCOLS=%d DROWS=%d", Name, DCOLS, DROWS); return; } // combine the GOTO and the data into one packet p = buffer; *p++ = PKT_START; *p++ = PKT_CTRL; // Goto *p++ = 0x80 | pos; *p++ = PKT_DATA; // Data *p++ = (char) len; for (pos = 0; pos < len; pos++) { *p++ = *data++; } *p++ = PKT_END; drv_TF_send(buffer, len + 5); } static void drv_TF_defchar(const int ascii, const unsigned char *matrix) { char buffer[14]; char *p; int i; p = buffer; *p++ = PKT_START; *p++ = PKT_CTRL; *p++ = 0x40 | 8 * ascii; *p++ = PKT_DATA; *p++ = 8; /* data length */ for (i = 0; i < 8; i++) { *p++ = *matrix++ & 0x1f; } *p++ = PKT_END; drv_TF_send(buffer, 14); } static int drv_TF_backlight(int backlight) { char buffer[4] = { PKT_START, PKT_BACKLIGHT, 0, PKT_END }; if (backlight < 0) backlight = 0; if (backlight > 1) backlight = 1; buffer[2] = backlight; drv_TF_send(buffer, 4); return backlight; } // test for existing resolutions from TREFON USB-LCDs (TEXT-Mode only) int drv_TF_valid_resolution(int rows, int cols) { if (rows == 1 && cols == 8) { return 0; } else if (rows == 2 && cols == 16) { return 0; } else if (rows == 4 && cols == 20) { return 0; } return -1; } static int drv_TF_start(const char *section, const int quiet) { int backlight; int rows = -1, cols = -1; char *s; 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 || drv_TF_valid_resolution(rows, cols) < 0) { error("%s: bad %s.Size '%s' (only 8x1/16x2/20x4) from %s", Name, section, s, cfg_source()); free(s); return -1; } DROWS = rows; DCOLS = cols; if (drv_TF_open() < 0) { error("%s: could not find a TREFON USB LCD", Name); return -1; } if (cfg_number(section, "Backlight", 1, 0, 1, &backlight) > 0) { drv_TF_backlight(backlight); } drv_TF_clear(); /* clear display */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, "www.trefon.de")) { sleep(3); drv_TF_clear(); } } return 0; } /****************************************/ /*** plugins ***/ /****************************************/ static void plugin_backlight(RESULT * result, RESULT * arg1) { double backlight; backlight = drv_TF_backlight(R2N(arg1)); SetResult(&result, R_NUMBER, &backlight); } /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /* using drv_generic_text_icon_draw(W) */ /* using drv_generic_text_bar_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_TF_list(void) { printf("generic"); return 0; } /* initialize driver & display */ int drv_TF_init(const char *section, const int quiet) { WIDGET_CLASS wc; int asc255bug; int ret; info("%s: %s", Name, "$Revision: 1.6 $"); /* display preferences */ XRES = 5; /* pixel width of one char */ YRES = 8; /* pixel height of one char */ CHARS = 8; /* number of user-defineable characters */ CHAR0 = 1; /* ASCII of first user-defineable char */ GOTO_COST = 64; /* number of bytes a goto command requires */ /* real worker functions */ drv_generic_text_real_write = drv_TF_write; drv_generic_text_real_defchar = drv_TF_defchar; /* start display */ if ((ret = drv_TF_start(section, quiet)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* initialize generic icon driver */ if ((ret = drv_generic_text_icon_init()) != 0) return ret; /* initialize generic bar driver */ if ((ret = drv_generic_text_bar_init(0)) != 0) return ret; /* add fixed chars to the bar driver */ /* most displays have a full block on ascii 255, but some have kind of */ /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */ /* char will not be used, but rendered by the bar driver */ cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug); drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */ if (!asc255bug) drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */ /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register icon widget */ wc = Widget_Icon; wc.draw = drv_generic_text_icon_draw; widget_register(&wc); /* register bar widget */ wc = Widget_Bar; wc.draw = drv_generic_text_bar_draw; widget_register(&wc); /* register plugins */ AddFunction("LCD::backlight", 1, plugin_backlight); return 0; } /* close driver & display */ int drv_TF_quit(const int quiet) { info("%s: shutting down.", Name); drv_generic_text_quit(); /* clear display */ drv_TF_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } debug("closing USB connection"); drv_TF_close(); return (0); } DRIVER drv_Trefon = { name:Name, list:drv_TF_list, init:drv_TF_init, quit:drv_TF_quit, };


context:
space:
mode: