lcd4linux.git - lcd4linux

Age	Commit message (Expand)	Author	Files	Lines
2000-03-30	[lcd4linux @ 2000-03-30 16:46:57 by reinelt]	reinelt	1	-0/+13
2000-03-10	[lcd4linux @ 2000-03-10 12:02:43 by reinelt]	reinelt	1	-0/+104

/* $Id$ * $URL$ * * Driver for a Noritake GU128x32-311 graphical display. * * Copyright (C) 2005 Julien Aube <ob@obconseil.net> * 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. * */ /* * *** Noritake Itron GU128x32-311 *** * A 128x32 VFD (Vacuum Fluorescent Display). * It is driver by a Hitachi microcontroller, with a specific * firmware. * The datasheet can be easily found on the internet by searching for the * the name of the display, it's a PDF file that describe the timing, and * the protocol to communicate with the Hitachi microcontroller. * * The display support 2 modes (that can be mutiplexed), one text mode * thanks to an integrated character generator, and provide 4 lines of * 21 caracters. * There is also a graphical mode that can be used to switch on or off * each one if the 128x32 pixels. (monochrome). * * The protocol include the possibility to clear the display memory quickly, * change the luminosity, swich the display on or off (without affecting the * content of the memory) and finally change the "page" or the caracter * generator. Two pages are available in the ROM, all the characters are * listed in the documentation. * * This driver support only the character mode at the moment. * A future release will support the graphical mode as an option. * * This driver is released under the GPL. */ /* * * exported fuctions: * * struct DRIVER drv_Noritake * */ #include "config.h" #include <stdlib.h> #include <unistd.h> #include <string.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 "udelay.h" #include "drv_generic_text.h" #include "drv_generic_parport.h" static char Name[] = "Noritake"; typedef struct { int type; char *name; int rows; int cols; int xres; int yrex; int goto_cost; int protocol; } MODEL; static int Model, Protocol; static MODEL Models[] = { {0x01, "GU311", 4, 21, 6, 8, 5, 1}, {0x02, "GU311_Graphic", 4, 21, 6, 8, 6, 1}, {0xff, "Unknown", -1, -1, -1, -1, -1, -1} }; static unsigned char SIGNAL_CS; /* Chip select, OUTPUT, negative logic, pport AUTOFEED */ static unsigned char SIGNAL_WR; /* Write OUTPUT, negative logic, pport STOBE */ static unsigned char SIGNAL_RESET; /* Reset, OUTPUT, negative logic, pport INIT */ static unsigned char SIGNAL_BLANK; /* Blank, OUTPUT , negative logic, pport SELECT-IN */ #if 0 static unsigned char SIGNAL_BUSY; /* Busy, INPUT , positive logic, pport BUSY, not used */ static unsigned char SIGNAL_FRP; /* Frame Pulse, INPUT , positive logic, pport ACK, not used */ #endif void (*drv_Noritake_clear) (void); /* Data port is positive logic */ /****************************************/ /*** hardware dependant functions ***/ /****************************************/ /* Low-level parport driving functions */ /* This function was used to pool the BUSY line on the parallel port, which can be linked to the BUSY line on the display. But since it works with a timed wait, this function is not necessary, and is kept just in case.*/ #if 0 static void drv_GU311_wait_busy(void) { char c; c = drv_generic_parport_status(); while ((c & SIGNAL_BUSY) == 0) { ndelay(200); /* Wait 100ns before next consultation of BUSY line if the first one was not successful */ c = drv_generic_parport_status(); } } #endif static void drv_GU311_send_char(char c) { #if 0 /* Disabled because all the cables does not have the busy line linked. */ drv_GU311_wait_busy(); /* ensuite the display is ready to take the command */ #endif drv_generic_parport_data(c); ndelay(30); /* delay to ensure data line stabilisation on long cables */ drv_generic_parport_control(SIGNAL_WR, 0); /* write line to enable */ ndelay(150); /* data hold time */ drv_generic_parport_control(SIGNAL_WR, 0xff); /* write line to disable */ ndelay(75); /* From spec : minimum time before next command */ } static void drv_GU311_send_string(char *str, int size) { int i; for (i = 0; i < size; i++) drv_GU311_send_char(str[i]); } /* Command-string elaboration functions */ static void drv_GU311_make_text_string(const int row, const int col, const char *data, int len) { static char cmd[96] = { 0x01, 'C', 0, 0, 'S', 0 }; unsigned char start_addr; /* Cols are 0x00..0x15, on 4 lines. */ start_addr = (0x16 * row) + col; if (start_addr > 0x57) return; if (len > 0x57) return; cmd[2] = start_addr; cmd[3] = len; memcpy(cmd + 5, data, len); drv_GU311_send_string(cmd, len + 5); } /* API functions */ static void drv_GU311_clear(void) { static char clear_cmd[] = { 0x01, 'O', 'P' }; drv_GU311_send_string(clear_cmd, sizeof(clear_cmd)); ndelay(500); /* Delay for execution - this command is the longuest */ } static void drv_GU311_write(const int row, const int col, const char *data, int len) { drv_GU311_make_text_string(row, col, data, len); } static void drv_GU311_reset(void) { drv_generic_parport_control(SIGNAL_RESET, 0); /* initiate reset */ ndelay(1000); /* reset hold time 1ms */ drv_generic_parport_control(SIGNAL_RESET, 0xff); ndelay(200000); /* reset ready time 200ms */ } static int drv_GU311_start(const char *section) { char cmd[3] = { 0x01, 'O' }; /* Parallel port opening and association */ if (drv_generic_parport_open(section, Name) < 0) return -1; if ((SIGNAL_CS = drv_generic_parport_wire_ctrl("CS", "AUTOFD")) == 0xff) return -1; if ((SIGNAL_WR = drv_generic_parport_wire_ctrl("WR", "STROBE")) == 0xff) return -1; if ((SIGNAL_RESET = drv_generic_parport_wire_ctrl("RESET", "INIT")) == 0xff) return -1; if ((SIGNAL_BLANK = drv_generic_parport_wire_ctrl("BLANK", "SLCTIN")) == 0xff) return -1; /* SIGNAL_BUSY=PARPORT_STATUS_BUSY; *//* Not currently needed */ /* SIGNAL_FRP=PARPORT_STATUS_ACK; *//* Not currently needed */ /* Signals configuration */ drv_generic_parport_direction(0); /* parallel port in output mode */ drv_generic_parport_control(SIGNAL_CS | SIGNAL_WR | SIGNAL_RESET | SIGNAL_BLANK, 0xff); /* All lines to "deactivate", -> 1 level on the wire */ drv_generic_parport_control(SIGNAL_CS, 0); /* CS to 0 all the time, write done by WR */ drv_GU311_reset(); /* Ready for commands from now on. */ /* Display configuration */ cmd[2] = '0'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Select char. page 0 */ cmd[2] = 'Q'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Select 'Quick Mode' */ cmd[2] = 'a'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Brightness at 100% */ cmd[2] = 'T'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Ensure display ON */ drv_Noritake_clear(); return 0; } static int drv_Noritake_start(const char *section) { char *model = 0; int i; model = cfg_get(section, "Model", NULL); if (model != NULL && *model != '\0') { for (i = 0; Models[i].type != 0xff; i++) { if (strcasecmp(Models[i].name, model) == 0) break; } if (Models[i].type == 0xff) { error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source()); return -1; } Model = i; info("%s: using model '%s'", Name, Models[Model].name); } else { error("%s: no '%s.Model' entry from %s", Name, section, cfg_source()); return -1; } DROWS = Models[Model].rows; DCOLS = Models[Model].cols; XRES = Models[Model].xres; YRES = Models[Model].xres; GOTO_COST = Models[Model].goto_cost; Protocol = Models[Model].protocol; /* display preferences */ CHARS = 0; /* number of user-defineable characters */ CHAR0 = 0; /* ASCII of first user-defineable char */ /* real worker functions */ drv_Noritake_clear = drv_GU311_clear; if (Models[Model].type == 0x01) { drv_generic_text_real_write = drv_GU311_write; } else { error("%s: Unsupported display. Currently supported are : GU311.", Name); return -1; } return drv_GU311_start(section); } /****************************************/ /*** plugins ***/ /****************************************/ /* none */ /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_Noritake_list(void) { printf("GU311 GU311_Graphic"); return 0; } /* initialize driver & display */ int drv_Noritake_init(const char *section, const int quiet) { WIDGET_CLASS wc; int ret; info("%s: %s", Name, "$Rev$"); /* start display */ if ((ret = drv_Noritake_start(section)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register plugins */ /* none */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, NULL)) { sleep(3); drv_Noritake_clear(); } } return 0; } /* close driver & display */ int drv_Noritake_quit(const int quiet) { info("%s: shutting down.", Name); /* clear display */ drv_Noritake_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } drv_generic_parport_close(); drv_generic_text_quit(); return (0); } DRIVER drv_Noritake = { .name = Name, .list = drv_Noritake_list, .init = drv_Noritake_init, .quit = drv_Noritake_quit, };