diff options
Diffstat (limited to 'drv_FutabaVFD.c')
| -rw-r--r-- | drv_FutabaVFD.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/drv_FutabaVFD.c b/drv_FutabaVFD.c new file mode 100644 index 0000000..7975845 --- /dev/null +++ b/drv_FutabaVFD.c @@ -0,0 +1,418 @@ +/* $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, +}; |