--- /dev/null
+/* $Id: drv_FutabaVFD.c -1 $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_FutabaVFD.c $
+ *
+ * A driver to run Futaba VFD M402SD06GL with LCD4Linux on parallel port
+ *
+ * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ * Copyright (C) 2012 Marcus Menzel <codingmax@gmx-topmail.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_FutabaVFD
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#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"
+#include "drv_generic_parport.h"
+
+
+static char Name[] = "FutabaVFD";
+
+static unsigned char SIGNAL_WR;
+static unsigned char SIGNAL_SELECT;
+static unsigned char SIGNAL_TEST;
+static unsigned char SIGNAL_BUSY;
+
+static unsigned char dim; /* brightness 0..3 */
+static unsigned char curPos; /* cursor position */
+static unsigned char curOn; /* cursor on */
+
+static unsigned char BUSY_SHIFT;
+static unsigned char BUSY_VALUE;
+
+
+/****************************************/
+/*** hardware dependant functions ***/
+/****************************************/
+
+
+/* example for sending one byte over the wire */
+static void drv_FutabaVFD_writeChar(const unsigned char c)
+{
+
+ int i;
+ unsigned char status;
+
+ drv_generic_parport_data(c);
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_SELECT, 0);
+ ndelay(60);
+ drv_generic_parport_control(SIGNAL_WR, 0xFF);
+
+ /*wait <=60ns till busy */
+ for (i = 0; i < 60; i++) {
+ status = drv_generic_parport_status();
+ if (((status >> BUSY_SHIFT) & 1) == BUSY_VALUE)
+ break;
+ ndelay(1);
+ }
+ ndelay(60 - i);
+ drv_generic_parport_control(SIGNAL_SELECT, 0xFF);
+
+ /*wait max 0.1s till not busy */
+ for (i = 0; i < 100000000; i++) {
+ status = drv_generic_parport_status();
+ if (((status >> BUSY_SHIFT) & 1) != BUSY_VALUE)
+ break;
+ ndelay(1);
+ }
+ ndelay(210);
+}
+
+
+
+static void drv_FutabaVFD_showCursor(int b)
+{
+ drv_FutabaVFD_writeChar((b) ? 0x13 : 0x14); /* b==0: cursor off */
+}
+
+static void drv_FutabaVFD_clear()
+{
+ drv_FutabaVFD_writeChar(0x1F); /*reset */
+ drv_FutabaVFD_writeChar(0x11); /*DC1 - normal display */
+ drv_FutabaVFD_showCursor(0);
+}
+
+
+static int drv_FutabaVFD_open(const char *section)
+{
+
+ if (drv_generic_parport_open(section, Name) != 0) {
+ error("%s: could not initialize parallel port!", Name);
+ return -1;
+ }
+
+ /* read the wiring from config */
+ if ((SIGNAL_WR = drv_generic_parport_wire_ctrl("WR", "STROBE")) == 0xFF)
+ return -1;
+ if ((SIGNAL_SELECT = drv_generic_parport_wire_ctrl("SEL", "SLCTIN")) == 0xFF)
+ return -1;
+ if ((SIGNAL_TEST = drv_generic_parport_wire_ctrl("TEST", "AUTOFD")) == 0xFF)
+ return -1;
+ if ((SIGNAL_BUSY = drv_generic_parport_wire_status("BUSY", "BUSY")) == 0xFF)
+ return -1;
+
+ BUSY_SHIFT = 0;
+ BUSY_VALUE = SIGNAL_BUSY;
+ while (BUSY_VALUE > 1) {
+ BUSY_VALUE >>= 1;
+ BUSY_SHIFT++;
+ }
+ BUSY_VALUE = (SIGNAL_BUSY == 0x80) ? 0 : 1; /* portpin 11 inverted */
+
+ /* set all signals to high */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_SELECT | SIGNAL_TEST, 0xFF);
+
+ /* set direction: write */
+ drv_generic_parport_direction(0);
+
+ return 0;
+}
+
+
+static int drv_FutabaVFD_close(void)
+{
+ drv_generic_parport_close();
+ return 0;
+}
+
+static void drv_FutabaVFD_send(const char *data, const unsigned int len)
+{
+ unsigned int i;
+ for (i = 0; i < len; i++)
+ drv_FutabaVFD_writeChar(*data++);
+}
+
+
+static void drv_FutabaVFD_goto(unsigned char pos)
+{
+ curPos = pos;
+ drv_FutabaVFD_writeChar(0x10);
+ drv_FutabaVFD_writeChar(curPos);
+}
+
+
+static void drv_FutabaVFD_write(const int row, const int col, const char *data, int len)
+{
+ unsigned char oldPos = curPos;
+ if (curOn)
+ drv_FutabaVFD_showCursor(0);
+ drv_FutabaVFD_goto(row * DCOLS + col);
+ drv_FutabaVFD_send(data, len);
+ drv_FutabaVFD_goto(oldPos);
+ if (curOn)
+ drv_FutabaVFD_showCursor(1);
+}
+
+static void drv_FutabaVFD_defchar(const int ascii, const unsigned char *matrix)
+{
+ return; // no defchars
+}
+
+
+static void drv_FutabaVFD_brightness(int brightness)
+{
+
+ if (brightness < 0)
+ dim = 0;
+ else if (brightness > 3)
+ dim = 3;
+ else
+ dim = brightness;
+
+ drv_FutabaVFD_writeChar(0x04);
+ drv_FutabaVFD_writeChar((dim < 3) ? (1 + dim) * 0x20 : 0xFF);
+}
+
+
+static void drv_FutabaVFD_test(int test)
+{
+ drv_generic_parport_control(SIGNAL_TEST, (test) ? 0 : 0xFF);
+}
+
+
+
+/* start text mode display */
+static int drv_FutabaVFD_start(const char *section)
+{
+
+ int brightness;
+ 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 || 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;
+
+ /* open communication with the display */
+ if (drv_FutabaVFD_open(section) < 0)
+ return -1;
+
+
+ if (cfg_number(section, "Brightness", 0, 0, 255, &brightness) > 0)
+ drv_FutabaVFD_brightness(brightness);
+
+
+ drv_FutabaVFD_clear(); /* clear display */
+
+ return 0;
+}
+
+
+
+/****************************************/
+/*** plugins ***/
+/****************************************/
+
+static void plugin_brightness(RESULT * result, const int argc, RESULT * argv[])
+{
+
+ double d = dim;
+
+ switch (argc) {
+ case 0:
+ SetResult(&result, R_NUMBER, &d);
+ break;
+ case 1:
+ drv_FutabaVFD_brightness(R2N(argv[0]));
+ d = dim;
+ SetResult(&result, R_NUMBER, &d);
+ break;
+ default:
+ error("%s::brightness(): wrong number of parameters", Name);
+ SetResult(&result, R_STRING, "");
+ }
+}
+
+
+
+/****************************************/
+/*** widget callbacks ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+/* using drv_generic_text_icon_draw(W) */
+/* using drv_generic_text_bar_draw(W) */
+/* using drv_generic_gpio_draw(W) */
+
+
+/****************************************/
+/*** exported functions ***/
+/****************************************/
+
+
+/* list models */
+int drv_FutabaVFD_list(void)
+{
+ printf("Futaba VFD M402SD06GL");
+ return 0;
+}
+
+
+/* initialize driver & display */
+/* use this function for a text display */
+int drv_FutabaVFD_init(const char *section, const int quiet)
+{
+ WIDGET_CLASS wc;
+ int ret;
+
+
+ info("%s: %s", Name, "$Rev: 0.0.1 $");
+
+
+ XRES = 5; /* pixel width of one char */
+ YRES = 7; /* pixel height of one char */
+ GOTO_COST = 2; /* number of bytes a goto command requires */
+
+
+ /* real worker functions */
+ drv_generic_text_real_write = drv_FutabaVFD_write;
+ drv_generic_text_real_defchar = drv_FutabaVFD_defchar;
+
+
+ /* start display */
+ if ((ret = drv_FutabaVFD_start(section)) != 0)
+ return ret;
+
+ if (!quiet) {
+ char buffer[40];
+ qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+ if (drv_generic_text_greet(buffer, "---")) {
+ sleep(3);
+ drv_FutabaVFD_clear();
+ }
+ }
+
+ /* initialize generic text driver */
+ if ((ret = drv_generic_text_init(section, Name)) != 0)
+ return ret;
+
+ /* initialize generic icon driver TODO */
+
+ 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 */
+ drv_generic_text_bar_add_segment(0, 0, 255, '_'); /* ASCII 32 = blank */
+ drv_generic_text_bar_add_segment(255, 255, 255, 0x7F); /* 0x7F = full dot */
+
+
+ /* register text widget */
+ wc = Widget_Text;
+ wc.draw = drv_generic_text_draw;
+ widget_register(&wc);
+
+ /* register icon widget TODO */
+ 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::brightness", -1, plugin_brightness);
+
+
+
+ return 0;
+}
+
+
+/* close driver & display */
+/* use this function for a text display */
+int drv_FutabaVFD_quit(const int quiet)
+{
+
+ info("%s: shutting down.", Name);
+
+ drv_generic_text_quit();
+
+ drv_FutabaVFD_clear();
+
+ if (!quiet) {
+ drv_generic_text_greet("goodbye!", NULL);
+ }
+
+ debug("closing connection");
+ drv_FutabaVFD_close();
+
+ return (0);
+}
+
+/* use this one for a text display */
+DRIVER drv_FutabaVFD = {
+ .name = Name,
+ .list = drv_FutabaVFD_list,
+ .init = drv_FutabaVFD_init,
+ .quit = drv_FutabaVFD_quit,
+};
projects / lcd4linux.git / commitdiff