/* $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 * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team * Copyright (C) 2012 Marcus Menzel * * 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 #include #include #include #include #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, };