lcd4linux.git - lcd4linux

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/* $Id$ * $URL$ * * new style driver for Cwlinux display modules * * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at> * Copyright (C) 2004 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_Cwlinux * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include "debug.h" #include "cfg.h" #include "qprintf.h" #include "timer.h" #include "plugin.h" #include "widget.h" #include "widget_text.h" #include "widget_icon.h" #include "widget_bar.h" #include "widget_keypad.h" #include "drv.h" #include "drv_generic_text.h" #include "drv_generic_gpio.h" #include "drv_generic_serial.h" #include "drv_generic_keypad.h" static char Name[] = "Cwlinux"; static int Model; static int Protocol; /* ring buffer for bytes received from the display */ static unsigned char RingBuffer[256]; static unsigned int RingRPos = 0; static unsigned int RingWPos = 0; typedef struct { int type; char *name; int rows; int cols; int xres; /* pixel width of one char */ int yres; /* pixel height of one char */ int gpos; int gpis; int chars; /* number of user definable chars */ int protocol; } MODEL; /* Fixme: number of gpo's should be verified */ static MODEL Models[] = { {0x01, "CW1602", 2, 16, 5, 7, 2, 2, 8, 1}, {0x02, "CW12232", 4, 20, 6, 8, 2, 2, 16, 2}, {0xff, "Unknown", -1, -1, -1, -1, -1, -1, -1, -1} }; /****************************************/ /*** hardware dependant functions ***/ /****************************************/ static void drv_CW_process_input(void) { while (RingRPos != RingWPos) { drv_generic_keypad_press(RingBuffer[RingRPos++]); if (RingRPos >= sizeof(RingBuffer)) RingRPos = 0; } } static int drv_CW_poll(void) { while (1) { char buffer[32]; int num, n; num = drv_generic_serial_poll(buffer, sizeof(buffer)); if (num <= 0) break; /* no more input */ /* put result into RingBuffer */ for (n = 0; n < num; n++) { RingBuffer[RingWPos++] = (unsigned char) buffer[n]; if (RingWPos >= sizeof(RingBuffer)) RingWPos = 0; } } if (RingRPos != RingWPos) return 1; else return 0; } static void drv_CW_timer(void __attribute__ ((unused)) * notused) { while (drv_CW_poll()) { drv_CW_process_input(); } } static void drv_CW_send(const char *string, const int len) { drv_generic_serial_write(string, len); usleep(20); if (drv_CW_poll()) drv_CW_process_input(); } static void drv_CW_write(const int row, const int col, const char *data, const int len) { char cmd[6] = "\376Gxy\375"; cmd[2] = (char) col; cmd[3] = (char) row; drv_CW_send(cmd, 5); drv_CW_send(data, len); } static void drv_CW1602_defchar(const int ascii, const unsigned char *buffer) { int i; char cmd[12] = "\376Nn12345678\375"; cmd[2] = (char) ascii; for (i = 0; i < 8; i++) { cmd[3 + i] = buffer[i] & 0x1f; } drv_CW_send(cmd, 12); } static void drv_CW12232_defchar(const int ascii, const unsigned char *buffer) { int i, j; char cmd[10] = "\376Nn123456\375"; cmd[2] = (char) ascii; /* The CW12232 uses a vertical bitmap layout, */ /* so we have to 'rotate' the bitmap. */ for (i = 0; i < 6; i++) { cmd[3 + i] = 0; for (j = 0; j < 8; j++) { if (buffer[j] & (1 << (5 - i))) { cmd[3 + i] |= (1 << j); } } } drv_CW_send(cmd, 10); } static int drv_CW_GPO(const int num, const int val) { /* Fixme: GPO's not yet implemented! */ error("%s: GPO's not yet implemented!", Name); /* Fixme: num*val to avoid compiler warning */ return num * val; } static int drv_CW_GPI(const int num) { if (num < 0 || num > GPIS) { return 0; } error("%s: GPI's not yet implemented!", Name); return num; } static void drv_CW_clear(void) { #if 1 drv_CW_send("\376X\375", 3); /* Clear Display */ usleep(500000); #else /* for some mysterious reason, we have to sleep after */ /* the command _and_ after the CMD_END... */ drv_CW_send("\376X", 2); /* Clear Display */ drv_CW_send("\375", 1); /* Command End */ #endif } static int drv_CW_brightness(int brightness) { static unsigned char Brightness = 0; char cmd[5] = "\376A_\375"; /* -1 is used to query the current brightness */ if (brightness == -1) return Brightness; if (brightness < 0) brightness = 0; if (brightness > 8) brightness = 8; Brightness = brightness; switch (Brightness) { case 0: /* backlight off */ drv_CW_send("\376F\375", 3); break; case 8: /* backlight on */ drv_CW_send("\376B\375", 3); break; default: /* backlight level */ cmd[2] = (char) Brightness; drv_CW_send(cmd, 4); break; } return Brightness; } static int drv_CW_keypad(const int num) { int val = WIDGET_KEY_PRESSED; switch (num) { case 65: val += WIDGET_KEY_UP; break; case 66: val += WIDGET_KEY_DOWN; break; case 67: val += WIDGET_KEY_LEFT; break; case 68: val += WIDGET_KEY_RIGHT; break; case 69: val += WIDGET_KEY_CONFIRM; break; case 70: val += WIDGET_KEY_CANCEL; break; default: error("%s: unknown keypad value %d", Name, num); } debug("%s: key %c (0x%x) pressed", Name, num, num); return val; } static int drv_CW_start(const char *section) { int i; char *model; char buffer[16]; 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; } /* open serial port */ if (drv_generic_serial_open(section, Name, 0) < 0) return -1; /* read firmware version */ drv_generic_serial_write("\3761\375", 3); usleep(100000); if (drv_generic_serial_read(buffer, 2) != 2) { info("unable to read firmware version!"); } else { info("Cwlinux Firmware V%d.%d", (int) buffer[0], (int) buffer[1]); } /* read model mumber */ drv_generic_serial_write("\3760\375", 3); usleep(100000); if (drv_generic_serial_read(buffer, 2) != 2) { info("unable to read model number!"); } else { info("Cwlinux model CW%d%d", (int) buffer[0], (int) buffer[1]); } /* initialize global variables */ DROWS = Models[Model].rows; DCOLS = Models[Model].cols; XRES = Models[Model].xres; YRES = Models[Model].yres; GPOS = Models[Model].gpos; GPIS = Models[Model].gpis; CHARS = Models[Model].chars; Protocol = Models[Model].protocol; /* regularly process display input */ timer_add(drv_CW_timer, NULL, 250, 0); drv_CW_clear(); drv_CW_send("\376D\375", 3); /* auto line wrap off */ drv_CW_send("\376R\375", 3); /* auto scroll off */ drv_CW_send("\376K\375", 3); /* underline cursor off */ drv_CW_send("\376B\375", 3); /* backlight on */ /* set brightness */ if (cfg_number(section, "Brightness", 0, 0, 8, &i) > 0) { drv_CW_brightness(i); } return 0; } /****************************************/ /*** plugins ***/ /****************************************/ static void plugin_brightness(RESULT * result, const int argc, RESULT * argv[]) { double brightness; switch (argc) { case 0: brightness = drv_CW_brightness(-1); SetResult(&result, R_NUMBER, &brightness); break; case 1: brightness = drv_CW_brightness(R2N(argv[0])); SetResult(&result, R_NUMBER, &brightness); 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) */ /* using drv_generic_keypad_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_CW_list(void) { int i; for (i = 0; Models[i].type != 0xff; i++) { printf("%s ", Models[i].name); } return 0; } /* initialize driver & display */ int drv_CW_init(const char *section, const int quiet) { WIDGET_CLASS wc; int ret; info("%s: %s", Name, "$Rev$"); /* display preferences */ CHAR0 = 1; /* ASCII of first user-defineable char */ GOTO_COST = 3; /* number of bytes a goto command requires */ INVALIDATE = 1; /* re-defined chars must be re-sent to the display */ /* start display */ if ((ret = drv_CW_start(section)) != 0) return ret; /* real worker functions */ drv_generic_text_real_write = drv_CW_write; drv_generic_gpio_real_set = drv_CW_GPO; drv_generic_gpio_real_get = drv_CW_GPI; drv_generic_keypad_real_press = drv_CW_keypad; switch (Protocol) { case 1: drv_generic_text_real_defchar = drv_CW1602_defchar; break; case 2: drv_generic_text_real_defchar = drv_CW12232_defchar; break; } if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %s", Name, Models[Model].name); if (drv_generic_text_greet(buffer, "www.cwlinux.com")) { sleep(3); drv_CW_clear(); } } /* 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 */ drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */ /* initialize generic GPIO driver */ if ((ret = drv_generic_gpio_init(section, Name)) != 0) return ret; /* initialize generic key pad driver */ if ((ret = drv_generic_keypad_init(section, Name)) != 0) return ret; /* 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::brightness", -1, plugin_brightness); return 0; } /* close driver & display */ int drv_CW_quit(const int quiet) { info("%s: shutting down.", Name); drv_generic_text_quit(); drv_generic_gpio_quit(); drv_generic_keypad_quit(); /* clear display */ drv_CW_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } drv_generic_serial_close(); return (0); } DRIVER drv_Cwlinux = { .name = Name, .list = drv_CW_list, .init = drv_CW_init, .quit = drv_CW_quit, };


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