diff options
Diffstat (limited to 'drv_USBLCD.c')
| -rw-r--r-- | drv_USBLCD.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/drv_USBLCD.c b/drv_USBLCD.c new file mode 100644 index 0000000..20346c6 --- /dev/null +++ b/drv_USBLCD.c @@ -0,0 +1,508 @@ +/* $Id: drv_USBLCD.c 1143 2011-02-12 22:46:19Z mzuther $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_USBLCD.c $ + * + * new style driver for USBLCD displays + * + * Copyright (C) 2003 Michael Reinelt <michael@reinelt.co.at> + * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> + * + * based on the old-style USBLCD driver which is + * Copyright (C) 2002 Robin Adams, Adams IT Services <info@usblcd.de> + * + * 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_USBLCD + * + */ + +#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> + +#ifdef HAVE_USB_H +#include <usb.h> +#endif + +#include "debug.h" +#include "cfg.h" +#include "qprintf.h" +#include "udelay.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 USBLCD_VENDOR 0x10D2 +#define USBLCD_VENDOR2 0x1212 +#define USBLCD_DEVICE 0x0001 + +#define IOC_GET_HARD_VERSION 1 +#define IOC_GET_DRV_VERSION 2 + + +static char Name[] = "USBLCD"; + +static char *Port = NULL; +static int use_libusb = 0; +static int usblcd_file; +static char *Buffer; +static char *BufPtr; + + +#ifdef HAVE_USB_H + +static usb_dev_handle *lcd; +static int interface; + +#endif + + + +/****************************************/ +/*** hardware dependant functions ***/ +/****************************************/ + +#ifdef HAVE_USB_H + +static int drv_UL_open(void) +{ + struct usb_bus *busses, *bus; + struct usb_device *dev; + + lcd = NULL; + + info("%s: scanning for USBLCD...", 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 == USBLCD_VENDOR) || + (dev->descriptor.idVendor == USBLCD_VENDOR2)) && (dev->descriptor.idProduct == USBLCD_DEVICE)) { + + unsigned int v = dev->descriptor.bcdDevice; + + info("%s: found USBLCD V%1d%1d.%1d%1d on bus %s device %s", Name, + (v & 0xF000) >> 12, (v & 0xF00) >> 8, (v & 0xF0) >> 4, (v & 0xF), bus->dirname, dev->filename); + + interface = 0; + lcd = usb_open(dev); + if (usb_claim_interface(lcd, interface) < 0) { + error("%s: usb_claim_interface() failed!", Name); + error("%s: maybe you have the usblcd module loaded?", Name); + return -1; + } + return 0; + } + } + } + error("%s: could not find a USBLCD", Name); + return -1; +} + + +static int drv_UL_close(void) +{ + usb_release_interface(lcd, interface); + usb_close(lcd); + + return 0; +} + +#endif + + +static void drv_UL_send(void) +{ + +#if 0 + struct timeval now, end; + gettimeofday(&now, NULL); +#endif + + if (use_libusb) { +#ifdef HAVE_USB_H + /* Fixme: Endpoint hardcoded to 1 ??? */ + usb_bulk_write(lcd, 1, Buffer, BufPtr - Buffer, 1000); +#endif + } else { + write(usblcd_file, Buffer, BufPtr - Buffer); + } + + +#if 0 + gettimeofday(&end, NULL); + debug("send %d bytes in %d usec (%d usec/byte)", BufPtr - Buffer, + (1000000 * (end.tv_sec - now.tv_sec) + end.tv_usec - now.tv_usec), + (1000000 * (end.tv_sec - now.tv_sec) + end.tv_usec - now.tv_usec) / (BufPtr - Buffer)); +#endif + + BufPtr = Buffer; +} + + +static void drv_UL_command(const unsigned char cmd) +{ + *BufPtr++ = '\0'; + *BufPtr++ = cmd; +} + + +static void drv_UL_clear(void) +{ + drv_UL_command(0x01); /* clear display */ + drv_UL_command(0x03); /* return home */ + drv_UL_send(); /* flush buffer */ +} + + +static void drv_UL_write(const int row, const int col, const char *data, int len) +{ + int pos; + + /* 16x4 Displays use a slightly different layout */ + if (DCOLS == 16 && DROWS == 4) { + pos = (row % 2) * 64 + (row / 2) * 16 + col; + } else { + pos = (row % 2) * 64 + (row / 2) * 20 + col; + } + + drv_UL_command(0x80 | pos); + + while (len--) { + if (*data == 0) + *BufPtr++ = 0; + *BufPtr++ = *data++; + } + + drv_UL_send(); +} + +static void drv_UL_defchar(const int ascii, const unsigned char *matrix) +{ + int i; + + drv_UL_command(0x40 | 8 * ascii); + + for (i = 0; i < 8; i++) { + if ((*matrix & 0x1f) == 0) + *BufPtr++ = 0; + *BufPtr++ = *matrix++ & 0x1f; + } + + drv_UL_send(); +} + + +static int drv_UL_start(const char *section, const int quiet) +{ + int rows = -1, cols = -1; + int major, minor; + char *port, *s; + char buf[128]; + + if (Port) { + free(Port); + Port = NULL; + } + + if ((port = cfg_get(section, "Port", NULL)) == NULL || *port == '\0') { + error("%s: no '%s.Port' entry from %s", Name, section, cfg_source()); + return -1; + } + + if (strcasecmp(port, "libusb") == 0) { +#ifdef HAVE_USB_H + use_libusb = 1; + debug("using libusb"); +#else + error("%s: cannot use 'libusb' port.", Name); + error("%s: lcd4linux was compiled without libusb support!", Name); + return -1; +#endif + } else { + if (port[0] == '/') { + Port = strdup(port); + } else { + int len = 5 + strlen(port) + 1; + Port = malloc(len); + qprintf(Port, len, "/dev/%s", port); + } + debug("using device %s ", Port); + } + + 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 (use_libusb) { + +#ifdef HAVE_USB_H + if (drv_UL_open() < 0) { + return -1; + } +#endif + + } else { + + /* open port */ + usblcd_file = open(Port, O_WRONLY); + if (usblcd_file == -1) { + error("%s: open(%s) failed: %s", Name, Port, strerror(errno)); + return -1; + } + + /* get driver version */ + memset(buf, 0, sizeof(buf)); + if (ioctl(usblcd_file, IOC_GET_DRV_VERSION, buf) != 0) { + error("%s: ioctl() failed, could not get Driver Version!", Name); + return -1; + } + info("%s: Driver Version: %s", Name, buf); + + if (sscanf(buf, "USBLCD Driver Version %d.%d", &major, &minor) != 2) { + error("%s: could not read Driver Version!", Name); + return -1; + } + if (major != 1) { + error("%s: Driver Version %d not supported!", Name, major); + return -1; + } + + memset(buf, 0, sizeof(buf)); + if (ioctl(usblcd_file, IOC_GET_HARD_VERSION, buf) != 0) { + error("%s: ioctl() failed, could not get Hardware Version!", Name); + return -1; + } + info("%s: Hardware Version: %s", Name, buf); + + if (sscanf(buf, "%d.%d", &major, &minor) != 2) { + error("%s: could not read Hardware Version!", Name); + return -1; + } + + if (major != 1) { + error("%s: Hardware Version %d not supported!", Name, major); + return -1; + } + } + + /* Init the command buffer */ + Buffer = (char *) malloc(1024); + if (Buffer == NULL) { + error("%s: command buffer could not be allocated: malloc() failed", Name); + return -1; + } + BufPtr = Buffer; + + /* initialize display */ + drv_UL_command(0x29); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */ + drv_UL_command(0x08); /* Display off, cursor off, blink off */ + drv_UL_command(0x0c); /* Display on, cursor off, blink off */ + drv_UL_command(0x06); /* curser moves to right, no shift */ + + drv_UL_clear(); /* clear display */ + + if (!quiet) { + char buffer[40]; + qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); + if (drv_generic_text_greet(buffer, "http://www.usblcd.de")) { + sleep(3); + drv_UL_clear(); + } + } + + return 0; +} + + +/****************************************/ +/*** plugins ***/ +/****************************************/ + +/* none at the moment... */ + + +/****************************************/ +/*** 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_UL_list(void) +{ + printf("USBLCD"); + return 0; +} + + +/* initialize driver & display */ +int drv_UL_init(const char *section, const int quiet) +{ + WIDGET_CLASS wc; + int asc255bug; + int ret; + + info("%s: %s", Name, "$Rev: 1143 $"); + + /* display preferences */ + XRES = 5; /* pixel width of one char */ + YRES = 8; /* pixel height of one char */ + CHARS = 8; /* number of user-defineable characters */ + CHAR0 = 0; /* ASCII of first user-defineable char */ + GOTO_COST = 2; /* number of bytes a goto command requires */ + + /* real worker functions */ + drv_generic_text_real_write = drv_UL_write; + drv_generic_text_real_defchar = drv_UL_defchar; + + + /* start display */ + if ((ret = drv_UL_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 */ + /* none at the moment... */ + + + return 0; +} + + +/* close driver & display */ +int drv_UL_quit(const int quiet) +{ + + info("%s: shutting down.", Name); + + /* flush buffer */ + drv_UL_send(); + + drv_generic_text_quit(); + + /* clear display */ + drv_UL_clear(); + + /* say goodbye... */ + if (!quiet) { + drv_generic_text_greet("goodbye!", NULL); + } + + if (use_libusb) { +#ifdef HAVE_USB_H + drv_UL_close(); +#endif + } else { + debug("closing port %s", Port); + close(usblcd_file); + } + + if (Buffer) { + free(Buffer); + Buffer = NULL; + BufPtr = Buffer; + } + + return (0); +} + + +DRIVER drv_USBLCD = { + .name = Name, + .list = drv_UL_list, + .init = drv_UL_init, + .quit = drv_UL_quit, +}; |