320 lines
9.5 KiB
C
320 lines
9.5 KiB
C
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/* Arduino SSD1306Ascii Library
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* Copyright (C) 2015 by William Greiman
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*
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* This file is part of the Arduino SSD1306Ascii Library
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*
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* This Library 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 3 of the License, or
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* (at your option) any later version.
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*
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* This Library 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 the Arduino SSD1306Ascii Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file SSD1306Ascii.h
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* @brief Base class for ssd1306 displays.
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*/
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#ifndef SSD1306Ascii_h
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#define SSD1306Ascii_h
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#include "Arduino.h"
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#include "SSD1306init.h"
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#include "fonts/allFonts.h"
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//------------------------------------------------------------------------------
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/** SSD1306Ascii version */
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#define SDD1306_ASCII_VERSION 1.1.0
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//------------------------------------------------------------------------------
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// Configuration options.
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/** Set Scrolling mode for new line.
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*
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* If INCLUDE_SCROLLING is defined to be zero, new line will not scroll
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* the display and code for scrolling will not be included. This option
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* will save some code space and one byte of RAM.
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*
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* If INCLUDE_SCROLLING is defined to be one, the scroll feature will
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* be included but not enabled. A call to setScroll() will be required
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* to enable scrolling.
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*
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* If INCLUDE_SCROLLING is defined to be two, the scroll feature will
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* be included and enabled. A call to setScroll() will be required
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* to disable scrolling.
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*/
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#define INCLUDE_SCROLLING 1
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/** Use larger faster I2C code. */
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#define OPTIMIZE_I2C 1
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/** Define OPTIMIZE_AVR_SPI non-zero for a faster smaller AVR SPI code.
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* Warning AVR will not use SPI transactions.
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*/
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#define OPTIMIZE_AVR_SPI 1
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//------------------------------------------------------------------------------
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// Values for writeDisplay() mode parameter.
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/** Write to Command register. */
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#define SSD1306_MODE_CMD 0
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/** Write one byte to display RAM. */
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#define SSD1306_MODE_RAM 1
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/** Write to display RAM with possible buffering. */
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#define SSD1306_MODE_RAM_BUF 2
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//-----------------------------------------------------------------------------
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/**
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* @brief Reset the display controller.
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*
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* @param[in] rst Reset pin number.
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*/
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inline void oledReset(uint8_t rst) {
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pinMode(rst, OUTPUT);
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digitalWrite(rst, LOW);
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delay(10);
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digitalWrite(rst, HIGH);
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delay(10);
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}
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//------------------------------------------------------------------------------
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/**
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* @class SSD1306Ascii
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* @brief SSD1306 base class
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*/
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class SSD1306Ascii : public Print {
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public:
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SSD1306Ascii() : m_magFactor(1), m_font(0) {}
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/**
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* @brief Determine the width of a character.
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*
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* @param[in] c Character code.
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* @return Width of the character in pixels.
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*/
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uint8_t charWidth(uint8_t c);
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/**
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* @brief Clear the display and set the cursor to (0, 0).
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*/
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void clear();
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/**
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* @brief Clear a region of the display.
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*
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* @param[in] c0 Starting column.
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* @param[in] c1 Ending column.
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* @param[in] r0 Starting row;
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* @param[in] r1 Ending row;
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* @note The final cursor position will be (c0, r0).
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*/
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void clear(uint8_t c0, uint8_t c1, uint8_t r0, uint8_t r1);
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/**
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* @brief Clear a field of n fieldWidth() characters.
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*
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* @param[in] col Field start column.
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*
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* @param[in] row Field start row.
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*
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* @param[in] n Number of characters in the field.
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*
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*/
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void clearField(uint8_t col, uint8_t row, uint8_t n);
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/**
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* @brief Clear the display to the end of the current line.
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* @note The number of rows cleared will be determined by the height
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* of the current font.
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* @note The cursor will be returned to the original position.
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*/
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void clearToEOL();
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/**
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* @return The current column in pixels.
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*/
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uint8_t col() {return m_col;}
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/**
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* @return The display hight in pixels.
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*/
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uint8_t displayHeight() {return m_displayHeight;}
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/**
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* @brief Set display to normal or 180 degree remap mode.
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*
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* @param[in] mode true for normal mode, false for remap mode.
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*
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* @note Adafruit and many ebay displays use remap mode.
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* Use normal mode to rotate these displays 180 degrees.
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*/
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void displayRemap(bool mode);
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/**
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* @return The display height in rows with eight pixels to a row.
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*/
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uint8_t displayRows() {return m_displayHeight/8;}
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/**
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* @return The display width in pixels.
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*/
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uint8_t displayWidth() {return m_displayWidth;}
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/**
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* @brief Width of a field in pixels.
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*
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* @param[in] n Number of characters in the field.
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*
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* @return Width of the field.
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*/
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size_t fieldWidth(uint8_t n);
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/**
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* @return The current font pointer.
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*/
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const uint8_t* font() {return m_font;}
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/**
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* @return The count of characters in a font.
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*/
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uint8_t fontCharCount();
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/**
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* @return The first character in a font.
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*/
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char fontFirstChar();
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/**
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* @return The current font height in pixels.
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*/
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uint8_t fontHeight();
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/**
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* @return The number of eight pixel rows required to display a character
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* in the current font.
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*/
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uint8_t fontRows() {return (fontHeight() + 7)/8;}
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/**
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* @return The maximum width of characters in the current font.
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*/
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uint8_t fontWidth();
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/**
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* @brief Set the cursor position to (0, 0).
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*/
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void home() {setCursor(0, 0);}
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/**
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* @brief Initialize the display controller.
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*
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* @param[in] dev A display initialization structure.
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*/
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void init(const DevType* dev);
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/**
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* @return letter-spacing in pixels with magnification factor.
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*/
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uint8_t letterSpacing() {return m_magFactor*m_letterSpacing;}
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/**
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* @return The character magnification factor.
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*/
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uint8_t magFactor() {return m_magFactor;}
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/**
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* @return the current row number with eight pixels to a row.
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*/
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uint8_t row() {return m_row;}
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/**
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* @brief Set the character magnification factor to one.
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*/
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void set1X() {m_magFactor = 1;}
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/**
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* @brief Set the character magnification factor to two.
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*/
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void set2X() {m_magFactor = 2;}
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/**
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* @brief Set the current column number.
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*
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* @param[in] col The desired column number in pixels.
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*/
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void setCol(uint8_t col);
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/**
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* @brief Set the display contrast.
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*
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* @param[in] value The contrast level in th range 0 to 255.
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*/
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void setContrast(uint8_t value);
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/**
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* @brief Set the cursor position.
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*
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* @param[in] col The column number in pixels.
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* @param[in] row the row number in eight pixel rows.
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*/
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void setCursor(uint8_t col, uint8_t row);
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/**
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* @brief Set the current font.
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*
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* @param[in] font Pointer to a font table.
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*/
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void setFont(const uint8_t* font);
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/**
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* @brief Set letter-spacing. setFont() will restore default letter-spacing.
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*
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* @param[in] pixels letter-spacing in pixels before magnification.
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*/
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void setLetterSpacing(uint8_t pixels) {m_letterSpacing = pixels;}
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/**
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* @brief Set the current row number.
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*
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* @param[in] row the row number in eight pixel rows.
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*/
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void setRow(uint8_t row);
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#if INCLUDE_SCROLLING
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/**
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* @brief Enable or disable scroll mode.
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*
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* @param[in] enable true enable scroll on new line false disable scroll.
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* @note Scroll mode is only supported on 64 pixel high displays.
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* Using setRow() or setCursor() will be unpredictable in scroll mode.
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* You must use a font with an integral number of line on
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* the display.
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*/
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void setScroll(bool enable);
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#endif // INCLUDE_SCROLLING
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/**
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* @brief Write a command byte to the display controller.
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*
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* @param[in] c The command byte.
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* @note The byte will immediately be sent to the controller.
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*/
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void ssd1306WriteCmd(uint8_t c) {writeDisplay(c, SSD1306_MODE_CMD);}
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/**
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* @brief Write a byte to RAM in the display controller.
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*
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* @param[in] c The data byte.
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* @note The byte will immediately be sent to the controller.
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*/
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void ssd1306WriteRam(uint8_t c);
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/**
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* @brief Write a byte to RAM in the display controller.
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*
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* @param[in] c The data byte.
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* @note The byte may be buffered until a call to ssd1306WriteCmd
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* or ssd1306WriteRam.
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*/
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void ssd1306WriteRamBuf(uint8_t c);
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/**
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* @param[in] str The pointer to string.
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* @return the width of the string in pixels.
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*/
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size_t strWidth(const char* str);
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/**
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* @brief Display a character.
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*
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* @param[in] c The character to display.
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* @return the value one.
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*/
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size_t write(uint8_t c);
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/**
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* @brief Display a string.
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*
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* @param[in] s The string to display.
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* @return The length of the string.
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*/
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size_t write(const char* s);
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private:
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uint16_t fontSize();
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virtual void writeDisplay(uint8_t b, uint8_t mode) = 0;
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uint8_t m_col; // Cursor column.
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uint8_t m_row; // Cursor RAM row.
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uint8_t m_displayWidth; // Display width.
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uint8_t m_displayHeight; // Display height.
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uint8_t m_colOffset; // Column offset RAM to SEG.
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uint8_t m_letterSpacing; // lerret-spacing in pixels.
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uint8_t m_magFactor; // Magnification factor.
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#if INCLUDE_SCROLLING
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uint8_t m_scroll; // Scroll mode
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#endif // INCLUDE_SCROLLING
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const uint8_t* m_font; // Current font.
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};
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#endif // SSD1306Ascii_h
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