Keith Mitchell / Hexidraw

Library for drawing on the Hexiwear's OLED - more features being actively worked on

Dependents:   Hexidraw_Demo Hexiwear-FinalProject_v2

Discussion: https://developer.mbed.org/forum/team-4615-Hexiwear-community/topic/26595/

Hexidraw is a library for drawing on the Hexiwear's OLED. Be aware that it is not very optimized, so drawing may be slow, especially when drawing on large areas of the screen.

Please see the wiki for API documentation.

Features:

  • Screen fill with a color
  • Drawing filled rectangles
  • Drawing circles with a set radius and line width
  • Setting individual pixels
  • Turning on and off the OLED's sleep mode
  • Drawing images

Example project: https://developer.mbed.org/users/keithm01/code/Hexidraw_Demo/

hexidraw.h

Committer:
keithm01
Date:
2016-08-20
Revision:
5:00876457cad4
Parent:
4:9c0b59439725

File content as of revision 5:00876457cad4:


#ifndef _HEXIDRAW_H_
#define _HEXIDRAW_H_

    #include <mbed.h>
    #include <stdarg.h>
    
    #include "oled_info.h"
    
    #define BLACK 0x0000
    #define WHITE 0xffff
    
    #define OLED_WIDTH 96
    #define OLED_HEIGHT 96
    
    #define OLED_BYTES_PER_PIXEL ( 2 )
    
    #define OLED_COL_OFFSET 16
    
    #define OLED_IMAGE_SIZE ( OLED_WIDTH * OLED_HEIGHT * OLED_BYTES_PER_PIXEL )
    #define OLED_BMP_HEADER_BYTE_SIZE (6)
    
    #define OLED_SPI_CHUNK (511)
    
    #define OLED_SKIP_IMAGE_HEADER( imgPtr ) ( (const uint8_t*)(imgPtr) + OLED_BMP_HEADER_BYTE_SIZE )
    
    #define USE_BUFFER 0
        
    /* borrowed from the Adafruit library at:
        https://developer.mbed.org/teams/ELLA-Robotics-Inc/code/Adafruit_GFX_1351/ 
       Since I don't know enough to make my own function :) */
    uint16_t Color565(uint8_t r, uint8_t g, uint8_t b) ;
    
    class OLED {
        public:
            OLED();
            void writeCommand(uint8_t v);
            void writeData(uint8_t v);
            void begin();
            void sleep();
            void wake();
            void pixel(int16_t x, int16_t y, uint16_t color);
            void cursor(int x, int y);
            void rect(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t fillcolor);
            void dim();
            void clear(uint16_t color);
            void circle(uint16_t x, uint16_t y, uint16_t radius, uint16_t color, uint16_t width = 1);
            void image (uint16_t x, uint16_t y, const uint8_t* image);
            void hline(uint16_t x, uint16_t y, uint16_t width, uint16_t color, uint16_t thickness = 1);
            void vline(uint16_t x, uint16_t y, uint16_t height, uint16_t color, uint16_t thickness = 1);
            void draw();
        private:
            SPI _spi;
            DigitalOut _cs, _dc, _reset;
            uint16_t displayBuffer[OLED_WIDTH * OLED_HEIGHT];
            void text(uint16_t x, uint16_t y, const uint8_t* text, const uint8_t* font, uint16_t color = WHITE);
        };

#endif