mirror of
https://github.com/netfun2000/lcd4linux.git
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a67cbe4975
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@808 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
537 lines
12 KiB
C
537 lines
12 KiB
C
/* $Id$
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* $URL$
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*
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* new style driver for Cwlinux display modules
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*
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* Copyright (C) 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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*
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* exported fuctions:
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*
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* struct DRIVER drv_Cwlinux
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*
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "debug.h"
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#include "cfg.h"
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#include "qprintf.h"
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#include "timer.h"
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#include "plugin.h"
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#include "widget.h"
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#include "widget_text.h"
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#include "widget_icon.h"
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#include "widget_bar.h"
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#include "widget_keypad.h"
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#include "drv.h"
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#include "drv_generic_text.h"
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#include "drv_generic_gpio.h"
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#include "drv_generic_serial.h"
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#include "drv_generic_keypad.h"
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static char Name[] = "Cwlinux";
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static int Model;
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static int Protocol;
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/* ring buffer for bytes received from the display */
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static unsigned char RingBuffer[256];
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static unsigned int RingRPos = 0;
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static unsigned int RingWPos = 0;
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typedef struct {
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int type;
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char *name;
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int rows;
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int cols;
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int xres; /* pixel width of one char */
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int yres; /* pixel height of one char */
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int gpos;
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int gpis;
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int chars; /* number of user definable chars */
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int protocol;
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} MODEL;
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/* Fixme: number of gpo's should be verified */
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static MODEL Models[] = {
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{0x01, "CW1602", 2, 16, 5, 7, 2, 2, 8, 1},
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{0x02, "CW12232", 4, 20, 6, 8, 2, 2, 16, 2},
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{0xff, "Unknown", -1, -1, -1, -1, -1, -1, -1, -1}
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};
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/****************************************/
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/*** hardware dependant functions ***/
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/****************************************/
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static void drv_CW_process_input(void)
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{
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while (RingRPos != RingWPos) {
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drv_generic_keypad_press(RingBuffer[RingRPos++]);
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if (RingRPos >= sizeof(RingBuffer))
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RingRPos = 0;
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}
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}
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static int drv_CW_poll(void)
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{
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while (1) {
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char buffer[32];
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int num, n;
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num = drv_generic_serial_poll(buffer, sizeof(buffer));
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if (num <= 0)
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break; /* no more input */
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/* put result into RingBuffer */
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for (n = 0; n < num; n++) {
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RingBuffer[RingWPos++] = (unsigned char) buffer[n];
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if (RingWPos >= sizeof(RingBuffer))
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RingWPos = 0;
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}
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}
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if (RingRPos != RingWPos)
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return 1;
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else
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return 0;
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}
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static void drv_CW_timer(void __attribute__ ((unused)) * notused)
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{
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while (drv_CW_poll()) {
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drv_CW_process_input();
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}
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}
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static void drv_CW_send(const char *string, const int len)
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{
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drv_generic_serial_write(string, len);
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usleep(20);
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if (drv_CW_poll())
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drv_CW_process_input();
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}
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static void drv_CW_write(const int row, const int col, const char *data, const int len)
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{
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char cmd[6] = "\376Gxy\375";
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cmd[2] = (char) col;
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cmd[3] = (char) row;
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drv_CW_send(cmd, 5);
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drv_CW_send(data, len);
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}
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static void drv_CW1602_defchar(const int ascii, const unsigned char *buffer)
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{
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int i;
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char cmd[12] = "\376Nn12345678\375";
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cmd[2] = (char) ascii;
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for (i = 0; i < 8; i++) {
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cmd[3 + i] = buffer[i] & 0x1f;
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}
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drv_CW_send(cmd, 12);
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}
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static void drv_CW12232_defchar(const int ascii, const unsigned char *buffer)
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{
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int i, j;
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char cmd[10] = "\376Nn123456\375";
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cmd[2] = (char) ascii;
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/* The CW12232 uses a vertical bitmap layout, */
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/* so we have to 'rotate' the bitmap. */
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for (i = 0; i < 6; i++) {
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cmd[3 + i] = 0;
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for (j = 0; j < 8; j++) {
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if (buffer[j] & (1 << (5 - i))) {
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cmd[3 + i] |= (1 << j);
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}
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}
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}
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drv_CW_send(cmd, 10);
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}
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static int drv_CW_GPO(const int num, const int val)
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{
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/* Fixme: GPO's not yet implemented! */
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error("%s: GPO's not yet implemented!", Name);
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/* Fixme: num*val to avoid compiler warning */
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return num * val;
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}
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static int drv_CW_GPI(const int num)
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{
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if (num < 0 || num > GPIS) {
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return 0;
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}
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error("%s: GPI's not yet implemented!", Name);
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return num;
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}
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static void drv_CW_clear(void)
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{
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#if 1
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drv_CW_send("\376X\375", 3); /* Clear Display */
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usleep(500000);
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#else
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/* for some mysterious reason, we have to sleep after */
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/* the command _and_ after the CMD_END... */
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drv_CW_send("\376X", 2); /* Clear Display */
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drv_CW_send("\375", 1); /* Command End */
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#endif
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}
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static int drv_CW_brightness(int brightness)
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{
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static unsigned char Brightness = 0;
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char cmd[5] = "\376A_\375";
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/* -1 is used to query the current brightness */
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if (brightness == -1)
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return Brightness;
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if (brightness < 0)
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brightness = 0;
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if (brightness > 8)
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brightness = 8;
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Brightness = brightness;
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switch (Brightness) {
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case 0:
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/* backlight off */
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drv_CW_send("\376F\375", 3);
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break;
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case 8:
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/* backlight on */
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drv_CW_send("\376B\375", 3);
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break;
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default:
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/* backlight level */
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cmd[2] = (char) Brightness;
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drv_CW_send(cmd, 4);
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break;
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}
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return Brightness;
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}
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static int drv_CW_keypad(const int num)
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{
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int val = WIDGET_KEY_PRESSED;
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switch (num) {
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case 65:
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val += WIDGET_KEY_UP;
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break;
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case 66:
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val += WIDGET_KEY_DOWN;
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break;
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case 67:
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val += WIDGET_KEY_LEFT;
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break;
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case 68:
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val += WIDGET_KEY_RIGHT;
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break;
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case 69:
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val += WIDGET_KEY_CONFIRM;
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break;
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case 70:
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val += WIDGET_KEY_CANCEL;
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break;
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default:
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error("%s: unknown keypad value %d", Name, num);
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}
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debug("%s: key %c (0x%x) pressed", Name, num, num);
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return val;
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}
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static int drv_CW_start(const char *section)
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{
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int i;
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char *model;
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char buffer[16];
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model = cfg_get(section, "Model", NULL);
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if (model != NULL && *model != '\0') {
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for (i = 0; Models[i].type != 0xff; i++) {
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if (strcasecmp(Models[i].name, model) == 0)
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break;
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}
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if (Models[i].type == 0xff) {
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error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
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return -1;
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}
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Model = i;
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info("%s: using model '%s'", Name, Models[Model].name);
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} else {
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error("%s: no '%s.Model' entry from %s", Name, section, cfg_source());
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return -1;
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}
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/* open serial port */
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if (drv_generic_serial_open(section, Name, 0) < 0)
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return -1;
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/* read firmware version */
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drv_generic_serial_write("\3761\375", 3);
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usleep(100000);
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if (drv_generic_serial_read(buffer, 2) != 2) {
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info("unable to read firmware version!");
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} else {
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info("Cwlinux Firmware V%d.%d", (int) buffer[0], (int) buffer[1]);
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}
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/* read model mumber */
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drv_generic_serial_write("\3760\375", 3);
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usleep(100000);
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if (drv_generic_serial_read(buffer, 2) != 2) {
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info("unable to read model number!");
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} else {
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info("Cwlinux model CW%d%d", (int) buffer[0], (int) buffer[1]);
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}
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/* initialize global variables */
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DROWS = Models[Model].rows;
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DCOLS = Models[Model].cols;
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XRES = Models[Model].xres;
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YRES = Models[Model].yres;
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GPOS = Models[Model].gpos;
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GPIS = Models[Model].gpis;
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CHARS = Models[Model].chars;
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Protocol = Models[Model].protocol;
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/* regularly process display input */
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timer_add(drv_CW_timer, NULL, 250, 0);
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drv_CW_clear();
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drv_CW_send("\376D\375", 3); /* auto line wrap off */
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drv_CW_send("\376R\375", 3); /* auto scroll off */
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drv_CW_send("\376K\375", 3); /* underline cursor off */
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drv_CW_send("\376B\375", 3); /* backlight on */
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/* set brightness */
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if (cfg_number(section, "Brightness", 0, 0, 8, &i) > 0) {
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drv_CW_brightness(i);
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}
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return 0;
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}
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/****************************************/
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/*** plugins ***/
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/****************************************/
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static void plugin_brightness(RESULT * result, const int argc, RESULT * argv[])
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{
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double brightness;
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switch (argc) {
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case 0:
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brightness = drv_CW_brightness(-1);
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SetResult(&result, R_NUMBER, &brightness);
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break;
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case 1:
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brightness = drv_CW_brightness(R2N(argv[0]));
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SetResult(&result, R_NUMBER, &brightness);
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break;
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default:
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error("%s.brightness(): wrong number of parameters", Name);
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SetResult(&result, R_STRING, "");
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}
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}
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/****************************************/
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/*** widget callbacks ***/
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/****************************************/
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/* using drv_generic_text_draw(W) */
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/* using drv_generic_text_icon_draw(W) */
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/* using drv_generic_text_bar_draw(W) */
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/* using drv_generic_gpio_draw(W) */
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/* using drv_generic_keypad_draw(W) */
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/****************************************/
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/*** exported functions ***/
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/****************************************/
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/* list models */
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int drv_CW_list(void)
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{
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int i;
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for (i = 0; Models[i].type != 0xff; i++) {
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printf("%s ", Models[i].name);
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}
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return 0;
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}
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/* initialize driver & display */
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int drv_CW_init(const char *section, const int quiet)
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{
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WIDGET_CLASS wc;
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int ret;
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info("%s: %s", Name, "$Rev$");
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/* display preferences */
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CHAR0 = 1; /* ASCII of first user-defineable char */
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GOTO_COST = 3; /* number of bytes a goto command requires */
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INVALIDATE = 1; /* re-defined chars must be re-sent to the display */
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/* start display */
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if ((ret = drv_CW_start(section)) != 0)
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return ret;
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/* real worker functions */
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drv_generic_text_real_write = drv_CW_write;
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drv_generic_gpio_real_set = drv_CW_GPO;
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drv_generic_gpio_real_get = drv_CW_GPI;
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drv_generic_keypad_real_press = drv_CW_keypad;
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switch (Protocol) {
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case 1:
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drv_generic_text_real_defchar = drv_CW1602_defchar;
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break;
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case 2:
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drv_generic_text_real_defchar = drv_CW12232_defchar;
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break;
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}
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if (!quiet) {
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char buffer[40];
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qprintf(buffer, sizeof(buffer), "%s %s", Name, Models[Model].name);
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if (drv_generic_text_greet(buffer, "www.cwlinux.com")) {
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sleep(3);
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drv_CW_clear();
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}
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}
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/* initialize generic text driver */
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if ((ret = drv_generic_text_init(section, Name)) != 0)
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return ret;
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/* initialize generic icon driver */
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if ((ret = drv_generic_text_icon_init()) != 0)
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return ret;
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/* initialize generic bar driver */
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if ((ret = drv_generic_text_bar_init(0)) != 0)
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return ret;
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/* add fixed chars to the bar driver */
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drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */
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/* initialize generic GPIO driver */
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if ((ret = drv_generic_gpio_init(section, Name)) != 0)
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return ret;
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/* initialize generic key pad driver */
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if ((ret = drv_generic_keypad_init(section, Name)) != 0)
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return ret;
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/* register text widget */
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wc = Widget_Text;
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wc.draw = drv_generic_text_draw;
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widget_register(&wc);
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/* register icon widget */
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wc = Widget_Icon;
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wc.draw = drv_generic_text_icon_draw;
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widget_register(&wc);
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/* register bar widget */
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wc = Widget_Bar;
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wc.draw = drv_generic_text_bar_draw;
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widget_register(&wc);
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/* register plugins */
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AddFunction("LCD::brightness", -1, plugin_brightness);
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return 0;
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}
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/* close driver & display */
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int drv_CW_quit(const int quiet)
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{
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info("%s: shutting down.", Name);
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drv_generic_text_quit();
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drv_generic_gpio_quit();
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drv_generic_keypad_quit();
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/* clear display */
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drv_CW_clear();
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/* say goodbye... */
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if (!quiet) {
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drv_generic_text_greet("goodbye!", NULL);
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}
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drv_generic_serial_close();
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return (0);
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}
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DRIVER drv_Cwlinux = {
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.name = Name,
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.list = drv_CW_list,
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.init = drv_CW_init,
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.quit = drv_CW_quit,
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};
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