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https://github.com/netfun2000/lcd4linux.git
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6eec23d6f4
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@1157 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
527 lines
12 KiB
C
527 lines
12 KiB
C
/* $Id$
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* $URL$
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*
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* Newhaven lcd4linux driver
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*
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* Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
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* Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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* Copyright (C) 2011 Rusty Clarkson <rusty@sutus.com>
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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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* *** Newhaven NHD‐0420D3Z‐FL‐GBW ***
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* A 20x4 LCD (Liquid Crystal Display).
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*
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* The display supports text mode provide 4 rows of 20 characters. This display
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* also supports many functions. The documentation for this display can be found
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* online easily. http://www.newhavendisplay.com/ would be a good place to start.
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* This driver was designed with the NHD-0420D3Z-FL-GBW in mind, but I'm sure
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* similar Newhaven displays will work with little to no effort.
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*
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* This driver is released under the GPL.
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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_Newhaven
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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 <unistd.h>
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#include <string.h>
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#include <errno.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 "udelay.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 "drv.h"
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/* text mode display? */
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#include "drv_generic_text.h"
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/* serial port? */
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//#include "drv_generic_serial.h"
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/* i2c bus? */
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#ifdef WITH_I2C
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#include "drv_generic_i2c.h"
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#endif
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static char Name[] = "Newhaven";
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/* Newhaven Constants */
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/* Line 1 */
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#define NEWHAVEN_R1_C1 0x00
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/* Line 2 */
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#define NEWHAVEN_R2_C1 0x40
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/* Line 3 */
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#define NEWHAVEN_R3_C1 0x14
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/* Line 4 */
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#define NEWHAVEN_R4_C1 0x54
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#define NEWHAVEN_ROW_MAX 4
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#define NEWHAVEN_COL_MAX 20
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#define NEWHAVEN_COMMAND 0xFE
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#define NEWHAVEN_DISPLAY_ON 0x41
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#define NEWHAVEN_DISPLAY_OFF 0x42
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#define NEWHAVEN_BAUD_RATE_SET 0x61
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#define NEWHAVEN_BAUD_RATE_SHOW 0x71
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#define NEWHAVEN_I2C_ADDR_SET 0x62
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#define NEWHAVEN_I2C_ADDR_SHOW 0x72
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#define NEWHAVEN_I2C_ADDR_DEFAULT 0x28
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#define NEWHAVEN_DISPLAY_FIRMWARE_VER 0x70
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#define NEWHAVEN_CONTRAST_SET 0x52
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#define NEWHAVEN_CONTRAST_MIN 1
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#define NEWHAVEN_CONTRAST_MAX 50
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#define NEWHAVEN_CONTRAST_DEFAULT 25
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#define NEWHAVEN_BRIGHTNESS_SET 0x53
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#define NEWHAVEN_BRIGHTNESS_MIN 1
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#define NEWHAVEN_BRIGHTNESS_MAX 8
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#define NEWHAVEN_BRIGHTNESS_DEFAULT 6
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#define NEWHAVEN_CLEAR_SCREEN 0x51
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#define NEWHAVEN_DISPLAY_SHIFT_LEFT 0x55
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#define NEWHAVEN_DISPLAY_SHIFT_RIGHT 0x56
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#define NEWHAVEN_CURSOR_SET_POS 0x45
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#define NEWHAVEN_CURSOR_HOME 0x46
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#define NEWHAVEN_CURSOR_UNDERLINE_ON 0x47
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#define NEWHAVEN_CURSOR_UNDERLINE_OFF 0x48
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#define NEWHAVEN_CURSOR_LEFT_ONE 0x49
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#define NEWHAVEN_CURSOR_RIGHT_ONE 0x4A
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#define NEWHAVEN_CURSOR_BLINKING_ON 0x4B
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#define NEWHAVEN_CURSOR_BLINKING_OFF 0x4C
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#define NEWHAVEN_BACKSPACE 0x4E
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#define NEWHAVEN_LOAD_CUSTOM_CHAR 0x54
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/****************************************/
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/*** hardware dependant functions ***/
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/****************************************/
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static int drv_Newhaven_open(const char *section)
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{
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/* open serial port */
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/* don't mind about device, speed and stuff, this function will take care of */
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//if (drv_generic_serial_open(section, Name, 0) < 0)
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//return -1;
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/* open i2c port */
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if (drv_generic_i2c_open(section, Name) < 0)
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return -1;
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return 0;
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}
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static int drv_Newhaven_close(void)
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{
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/* close whatever port you've opened */
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//drv_generic_serial_close();
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drv_generic_i2c_close();
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return 0;
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}
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/* dummy function that sends data to the display */
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static void drv_Newhaven_sendData(const char *data, const unsigned int len)
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{
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unsigned int i;
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/* send data to the serial port is easy... */
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//drv_generic_serial_write(data, len);
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/* sending data using other methods is a bit more tricky... */
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for (i = 0; i < len; i++) {
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/* send data to the i2c port */
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drv_generic_i2c_byte(data[i]);
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}
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}
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/* dummy function that sends commands to the display */
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static void drv_Newhaven_sendCommand(const char command, const char *data, const unsigned int len)
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{
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/* send commands to the serial port */
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//drv_generic_serial_write(NEWHAVEN_COMMAND, 1);
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//drv_generic_serial_write(command, 1);
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/* send commands to the i2c port */
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drv_generic_i2c_byte(NEWHAVEN_COMMAND);
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drv_generic_i2c_byte(command);
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/* send data */
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drv_Newhaven_sendData(data, len);
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}
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/* text mode displays only */
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static void drv_Newhaven_clear(void)
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{
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char cmd;
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/* do whatever is necessary to clear the display */
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cmd = NEWHAVEN_CLEAR_SCREEN;
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drv_Newhaven_sendCommand(cmd, NULL, 0);
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}
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/* Turn display on */
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static void drv_Newhaven_display_on(void)
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{
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char cmd;
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/* do whatever is necessary to turn on the display */
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cmd = NEWHAVEN_DISPLAY_ON;
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drv_Newhaven_sendCommand(cmd, NULL, 0);
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}
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/* Turn display off */
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static void __attribute__ ((unused)) drv_Newhaven_display_off(void)
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{
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char cmd;
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/* do whatever is necessary to turn off the display */
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cmd = NEWHAVEN_DISPLAY_OFF;
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drv_Newhaven_sendCommand(cmd, NULL, 0);
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}
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/* text mode displays only */
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static void drv_Newhaven_write(const int row, const int col, const char *data, int len)
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{
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char cmd;
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char wData[1];
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/* do the cursor positioning here */
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cmd = NEWHAVEN_CURSOR_SET_POS;
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if (col < 0 || col > DCOLS - 1)
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error("%s: Invalid col, %d. Valid cols 0-%d.", Name, col, DCOLS - 1);
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if (len > DCOLS - (col + 1))
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error("%s: Data length, %d, longer than columns left in row, %d.", Name, len, DCOLS - (col + 1));
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switch (row) {
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case 0:
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wData[0] = NEWHAVEN_R1_C1 + col;
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break;
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case 1:
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wData[0] = NEWHAVEN_R2_C1 + col;
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break;
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case 2:
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wData[0] = NEWHAVEN_R3_C1 + col;
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break;
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case 3:
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wData[0] = NEWHAVEN_R4_C1 + col;
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break;
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default:
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error("%s: Invalid row, %d. Valid rows 0-%d.", Name, row, DROWS - 1);
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return;
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}
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drv_Newhaven_sendCommand(cmd, wData, 1);
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/* send string to the display */
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drv_Newhaven_sendData(data, len);
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}
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/* text mode displays only */
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static void drv_Newhaven_defchar(const int ascii, const unsigned char *matrix)
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{
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char cmd;
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char wData[9];
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int i;
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/* call the 'define character' function */
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cmd = NEWHAVEN_LOAD_CUSTOM_CHAR;
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wData[0] = ascii;
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/* send bitmap to the display */
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for (i = 0; i < 8; i++) {
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wData[i + 1] = *matrix++;
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}
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drv_Newhaven_sendCommand(cmd, wData, 9);
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}
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/* Set the contrast of the display */
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static int drv_Newhaven_contrast(int contrast)
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{
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char cmd;
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char wData[1];
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/* adjust limits according to the display */
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if (contrast < NEWHAVEN_CONTRAST_MIN)
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contrast = NEWHAVEN_CONTRAST_MIN;
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if (contrast > NEWHAVEN_CONTRAST_MAX)
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contrast = NEWHAVEN_CONTRAST_MAX;
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/* call a 'contrast' function */
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cmd = NEWHAVEN_CONTRAST_SET;
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wData[0] = contrast;
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drv_Newhaven_sendCommand(cmd, wData, 1);
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return contrast;
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}
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/* Set the brightness of the display */
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static int drv_Newhaven_brightness(int brightness)
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{
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char cmd;
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char wData[1];
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/* adjust limits according to the display */
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if (brightness < NEWHAVEN_BRIGHTNESS_MIN)
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brightness = NEWHAVEN_BRIGHTNESS_MIN;
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if (brightness > NEWHAVEN_BRIGHTNESS_MAX)
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brightness = NEWHAVEN_BRIGHTNESS_MAX;
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/* call a 'brightness' function */
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cmd = NEWHAVEN_BRIGHTNESS_SET;
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wData[0] = brightness;
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drv_Newhaven_sendCommand(cmd, wData, 1);
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return brightness;
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}
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/* start text mode display */
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static int drv_Newhaven_start(const char *section)
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{
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int contrast, brightness;
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int rows = -1, cols = -1;
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char *s;
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s = cfg_get(section, "Size", NULL);
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if (s == NULL || *s == '\0') {
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error("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
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return -1;
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}
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if (sscanf(s, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1 || rows > NEWHAVEN_ROW_MAX
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|| cols > NEWHAVEN_COL_MAX) {
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error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source());
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free(s);
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return -1;
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}
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DROWS = rows;
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DCOLS = cols;
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/* open communication with the display */
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if (drv_Newhaven_open(section) < 0) {
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return -1;
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}
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/* reset & initialize display */
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drv_Newhaven_display_on();
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if (cfg_number
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(section, "Contrast", NEWHAVEN_CONTRAST_DEFAULT, NEWHAVEN_CONTRAST_MIN, NEWHAVEN_CONTRAST_MAX, &contrast) > 0) {
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drv_Newhaven_contrast(contrast);
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}
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if (cfg_number
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(section, "Brightness", NEWHAVEN_BRIGHTNESS_DEFAULT, NEWHAVEN_BRIGHTNESS_MIN, NEWHAVEN_BRIGHTNESS_MAX,
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&brightness) > 0) {
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drv_Newhaven_brightness(brightness);
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}
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drv_Newhaven_clear(); /* clear display */
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sleep(1);
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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_contrast(RESULT * result, RESULT * arg1)
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{
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double contrast;
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contrast = drv_Newhaven_contrast(R2N(arg1));
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SetResult(&result, R_NUMBER, &contrast);
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}
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static void plugin_brightness(RESULT * result, RESULT * arg1)
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{
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double brightness;
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brightness = drv_Newhaven_brightness(R2N(arg1));
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SetResult(&result, R_NUMBER, &brightness);
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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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/****************************************/
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/*** exported functions ***/
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/****************************************/
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/* list models */
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int drv_Newhaven_list(void)
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{
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printf("%s driver", Name);
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return 0;
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}
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/* initialize driver & display */
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/* use this function for a text display */
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int drv_Newhaven_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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XRES = 5; /* pixel width of one char */
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YRES = 8; /* pixel height of one char */
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CHARS = 8; /* number of user-defineable characters */
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CHAR0 = 0; /* ASCII of first user-defineable char */
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GOTO_COST = 2; /* number of bytes a goto command requires */
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/* real worker functions */
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drv_generic_text_real_write = drv_Newhaven_write;
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drv_generic_text_real_defchar = drv_Newhaven_defchar;
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/* start display */
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if ((ret = drv_Newhaven_start(section)) != 0)
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return ret;
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if (!quiet) {
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char buffer[40];
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qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
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if (drv_generic_text_greet(buffer, "www.bwct.de")) {
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sleep(3);
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drv_Newhaven_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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/* 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::contrast", 1, plugin_contrast);
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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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/* use this function for a text display */
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int drv_Newhaven_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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/* clear display */
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drv_Newhaven_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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debug("closing connection");
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drv_Newhaven_close();
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return (0);
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}
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/* use this one for a text display */
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DRIVER drv_Newhaven = {
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.name = Name,
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.list = drv_Newhaven_list,
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.init = drv_Newhaven_init,
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.quit = drv_Newhaven_quit,
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};
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