diff options
Diffstat (limited to 'drv_Trefon.c')
| -rw-r--r-- | drv_Trefon.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/drv_Trefon.c b/drv_Trefon.c new file mode 100644 index 0000000..00d03eb --- /dev/null +++ b/drv_Trefon.c @@ -0,0 +1,416 @@ +/* $Id: drv_Trefon.c 975 2009-01-18 11:16:20Z michael $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_Trefon.c $ + * + * driver for TREFON USB LCD displays - http://www.trefon.de + * + * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.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. + * + */ + +/* + * + * 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; + + +/****************************************/ +/*** 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_set_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(unsigned char *data, int size) +{ + unsigned 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, (char *) buffer, 64, 2000); +} + + +static void drv_TF_command(const unsigned char cmd) +{ + unsigned 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) +{ + unsigned char buffer[64]; + unsigned 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) +{ + + unsigned char buffer[14]; + unsigned 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) +{ + unsigned 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("TREFON USB LCD"); + 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, "$Rev: 975 $"); + + /* 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, +}; |