drivers/displays/bitmap/ssd1306/ssd1306.h

   1 /**************************************************************************/
   2 /*!
   3     @file     ssd1306.h
   4     @author   K. Townsend (microBuilder.eu)
   5     @date     18 January 2012
   6     @version  0.10
   7
   8     @section LICENSE
   9
  10     Software License Agreement (BSD License)
  11
  12     Copyright (c) 2012, microBuilder SARL
  13     All rights reserved.
  14
  15     Redistribution and use in source and binary forms, with or without
  16     modification, are permitted provided that the following conditions are met:
  17     1. Redistributions of source code must retain the above copyright
  18     notice, this list of conditions and the following disclaimer.
  19     2. Redistributions in binary form must reproduce the above copyright
  20     notice, this list of conditions and the following disclaimer in the
  21     documentation and/or other materials provided with the distribution.
  22     3. Neither the name of the copyright holders nor the
  23     names of its contributors may be used to endorse or promote products
  24     derived from this software without specific prior written permission.
  25
  26     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  27     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  28     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  29     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  30     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  31     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  32     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  33     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37 /**************************************************************************/
  38 #ifndef __SSD1306_H__
  39 #define __SSD1306_H__
  40
  41 #include "projectconfig.h"
  42
  43 #include "drivers/displays/smallfonts.h"
  44
  45 /*=========================================================================
  46     Bus Select
  47     -----------------------------------------------------------------------
  48     The SSD1306 can be driven using either SPI or I2C.  Select the
  49     appropriate bus below to indicate which one you wish to use.
  50
  51     SSD1306_BUS_SPI   Use bit-banged SPI
  52
  53     SSD1306_BUS_I2C   Use HW I2C
  54
  55     -----------------------------------------------------------------------*/
  56     // #define SSD1306_BUS_SPI
  57     #define SSD1306_BUS_I2C
  58
  59     #if defined SSD1306_BUS_SPI && defined SSD1306_BUS_I2C
  60       #error "Only one SSD1306 bus interface can be specified at once in ssd1306.h"
  61     #endif
  62     #if !defined SSD1306_BUS_SPI && !defined SSD1306_BUS_I2C
  63       #error "At least one SSD1306 bus interface must be specified in ssd1306.h"
  64     #endif
  65 /*=========================================================================*/
  66
  67
  68 #if defined SSD1306_BUS_I2C
  69 /*=========================================================================
  70     I2C Address - 011110+SA0+RW ... 0x78 for SA0 = 0, 0x7A for SA0 = 1
  71     ---------------------------------------------------------------------*/
  72     #define SSD1306_I2C_ADDRESS   (0x78)
  73     #define SSD1306_I2C_READWRITE (0x01)
  74 /*=========================================================================*/
  75 #endif
  76
  77 /*=========================================================================
  78     Display Size
  79     -----------------------------------------------------------------------
  80     The driver is used in multiple displays (128x64, 128x32, etc.).
  81     Select the appropriate display below to create an appropriately
  82     sized framebuffer, etc.
  83
  84     SSD1306_128_64  128x64 pixel display
  85
  86     SSD1306_128_32  128x32 pixel display
  87
  88     You also need to set the LCDWIDTH and LCDHEIGHT defines to an
  89     appropriate size
  90
  91     -----------------------------------------------------------------------*/
  92     #define SSD1306_128_64
  93     // #define SSD1306_128_32
  94
  95     #if defined SSD1306_128_64 && defined SSD1306_128_32
  96       #error "Only one SSD1306 display can be specified at once in ssd1306.h"
  97     #endif
  98     #if !defined SSD1306_128_64 && !defined SSD1306_128_32
  99       #error "At least one SSD1306 display must be specified in ssd1306.h"
 100     #endif
 101
 102     #if defined SSD1306_128_64
 103       #define SSD1306_LCDWIDTH                  128
 104       #define SSD1306_LCDHEIGHT                 64
 105     #endif
 106     #if defined SSD1306_128_32
 107       #define SSD1306_LCDWIDTH                  128
 108       #define SSD1306_LCDHEIGHT                 32
 109     #endif
 110 /*=========================================================================*/
 111
 112
 113 // Pin Definitions
 114 // ---------------
 115 // The following are only relevant for SPI mode!
 116 // For I2C, connect Reset to the LPC1114 reset pin, and HW DC for 1 or 0
 117 // to set last I2C address but to 1 or 0.  This means the OLED can not
 118 // be reset in SW seperate from the MCU, but allows the OLED to be used
 119 // with only the two I2C pins
 120
 121 #define SSD1306_DC_PORT                    (2)     // Data/Command ... also used as SA0 for I2C
 122 #define SSD1306_DC_PIN                     (1)
 123 #define SSD1306_RST_PORT                   (2)     // Reset
 124 #define SSD1306_RST_PIN                    (2)
 125 #define SSD1306_CS_PORT                    (2)     // Select
 126 #define SSD1306_CS_PIN                     (3)
 127 #define SSD1306_SCLK_PORT                  (2)     // Serial Clock
 128 #define SSD1306_SCLK_PIN                   (5)
 129 #define SSD1306_SDAT_PORT                  (2)     // Serial Data
 130 #define SSD1306_SDAT_PIN                   (6)
 131
 132 // Commands
 133 #define SSD1306_SETCONTRAST               0x81
 134 #define SSD1306_DISPLAYALLON_RESUME       0xA4
 135 #define SSD1306_DISPLAYALLON              0xA5
 136 #define SSD1306_NORMALDISPLAY             0xA6
 137 #define SSD1306_INVERTDISPLAY             0xA7
 138 #define SSD1306_DISPLAYOFF                0xAE
 139 #define SSD1306_DISPLAYON                 0xAF
 140 #define SSD1306_SETDISPLAYOFFSET          0xD3
 141 #define SSD1306_SETCOMPINS                0xDA
 142 #define SSD1306_SETVCOMDETECT             0xDB
 143 #define SSD1306_SETDISPLAYCLOCKDIV        0xD5
 144 #define SSD1306_SETPRECHARGE              0xD9
 145 #define SSD1306_SETMULTIPLEX              0xA8
 146 #define SSD1306_SETLOWCOLUMN              0x00
 147 #define SSD1306_SETHIGHCOLUMN             0x10
 148 #define SSD1306_SETSTARTLINE              0x40
 149 #define SSD1306_MEMORYMODE                0x20
 150 #define SSD1306_COMSCANINC                0xC0
 151 #define SSD1306_COMSCANDEC                0xC8
 152 #define SSD1306_SEGREMAP                  0xA0
 153 #define SSD1306_CHARGEPUMP                0x8D
 154 #define SSD1306_EXTERNALVCC               0x1
 155 #define SSD1306_INTERNALVCC               0x2
 156 #define SSD1306_SWITCHCAPVCC              0x2
 157
 158 // Initialisation/Config Prototypes
 159 void    ssd1306Init ( uint8_t vccstate );
 160 void    ssd1306DrawPixel ( uint8_t x, uint8_t y );
 161 void    ssd1306ClearPixel ( uint8_t x, uint8_t y );
 162 uint8_t ssd1306GetPixel ( uint8_t x, uint8_t y );
 163 void    ssd1306ClearScreen ( void );
 164 void    ssd1306Refresh ( void );
 165 void    ssd1306DrawString( uint16_t x, uint16_t y, char* text, struct FONT_DEF font );
 166 void    ssd1306ShiftFrameBuffer( uint8_t height );
 167
 168 #endif