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|
/* $Id$
* $URL$
*
* 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;
extern int usb_debug;
/****************************************/
/*** 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(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("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, "$Rev$");
/* 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,
};
|