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authorVasil Zlatanov <v@skozl.com>2017-05-03 16:30:16 +0100
committerVasil Zlatanov <v@skozl.com>2017-05-03 16:30:16 +0100
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Add template and build environment.
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+/*********************************************************************
+This is a library for our Monochrome OLEDs based on SSD1306 drivers
+
+ Pick one up today in the adafruit shop!
+ ------> http://www.adafruit.com/category/63_98
+
+These displays use SPI to communicate, 4 or 5 pins are required to
+interface
+
+Adafruit invests time and resources providing this open source code,
+please support Adafruit and open-source hardware by purchasing
+products from Adafruit!
+
+Written by Limor Fried/Ladyada for Adafruit Industries.
+BSD license, check license.txt for more information
+All text above, and the splash screen must be included in any redistribution
+*********************************************************************/
+
+/*
+ * Modified by Neal Horman 7/14/2012 for use in mbed
+ */
+
+#ifndef _ADAFRUIT_SSD1306_H_
+#define _ADAFRUIT_SSD1306_H_
+
+#include "mbed.h"
+#include "Adafruit_GFX.h"
+
+#include <vector>
+#include <algorithm>
+
+// A DigitalOut sub-class that provides a constructed default state
+class DigitalOut2 : public DigitalOut
+{
+public:
+ DigitalOut2(PinName pin, bool active = false) : DigitalOut(pin) { write(active); };
+ DigitalOut2& operator= (int value) { write(value); return *this; };
+ DigitalOut2& operator= (DigitalOut2& rhs) { write(rhs.read()); return *this; };
+ operator int() { return read(); };
+};
+
+#define SSD1306_EXTERNALVCC 0x1
+#define SSD1306_SWITCHCAPVCC 0x2
+
+/** The pure base class for the SSD1306 display driver.
+ *
+ * You should derive from this for a new transport interface type,
+ * such as the SPI and I2C drivers.
+ */
+class Adafruit_SSD1306 : public Adafruit_GFX
+{
+public:
+ Adafruit_SSD1306(PinName RST, uint8_t rawHeight = 32, uint8_t rawWidth = 128)
+ : Adafruit_GFX(rawWidth,rawHeight)
+ , rst(RST,false)
+ {
+ buffer.resize(rawHeight * rawWidth / 8);
+ };
+
+ void begin(uint8_t switchvcc = SSD1306_SWITCHCAPVCC);
+
+ // These must be implemented in the derived transport driver
+ virtual void command(uint8_t c) = 0;
+ virtual void data(uint8_t c) = 0;
+ virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
+
+ /// Clear the display buffer
+ void clearDisplay(void);
+ virtual void invertDisplay(bool i);
+
+ /// Cause the display to be updated with the buffer content.
+ void display();
+ /// Fill the buffer with the AdaFruit splash screen.
+ virtual void splash();
+
+protected:
+ virtual void sendDisplayBuffer() = 0;
+ DigitalOut2 rst;
+
+ // the memory buffer for the LCD
+ std::vector<uint8_t> buffer;
+};
+
+
+/** This is the SPI SSD1306 display driver transport class
+ *
+ */
+class Adafruit_SSD1306_Spi : public Adafruit_SSD1306
+{
+public:
+ /** Create a SSD1306 SPI transport display driver instance with the specified DC, RST, and CS pins, as well as the display dimentions
+ *
+ * Required parameters
+ * @param spi - a reference to an initialized SPI object
+ * @param DC (Data/Command) pin name
+ * @param RST (Reset) pin name
+ * @param CS (Chip Select) pin name
+ *
+ * Optional parameters
+ * @param rawHeight - the vertical number of pixels for the display, defaults to 32
+ * @param rawWidth - the horizonal number of pixels for the display, defaults to 128
+ */
+ Adafruit_SSD1306_Spi(SPI &spi, PinName DC, PinName RST, PinName CS, uint8_t rawHieght = 32, uint8_t rawWidth = 128)
+ : Adafruit_SSD1306(RST, rawHieght, rawWidth)
+ , cs(CS,true)
+ , dc(DC,false)
+ , mspi(spi)
+ {
+ begin();
+ splash();
+ display();
+ };
+
+ virtual void command(uint8_t c)
+ {
+ cs = 1;
+ dc = 0;
+ cs = 0;
+ mspi.write(c);
+ cs = 1;
+ };
+
+ virtual void data(uint8_t c)
+ {
+ cs = 1;
+ dc = 1;
+ cs = 0;
+ mspi.write(c);
+ cs = 1;
+ };
+
+protected:
+ virtual void sendDisplayBuffer()
+ {
+ cs = 1;
+ dc = 1;
+ cs = 0;
+
+ for(uint16_t i=0, q=buffer.size(); i<q; i++)
+ mspi.write(buffer[i]);
+
+ if(height() == 32)
+ {
+ for(uint16_t i=0, q=buffer.size(); i<q; i++)
+ mspi.write(0);
+ }
+
+ cs = 1;
+ };
+
+ DigitalOut2 cs, dc;
+ SPI &mspi;
+};
+
+/** This is the I2C SSD1306 display driver transport class
+ *
+ */
+class Adafruit_SSD1306_I2c : public Adafruit_SSD1306
+{
+public:
+ #define SSD_I2C_ADDRESS 0x78
+ /** Create a SSD1306 I2C transport display driver instance with the specified RST pin name, the I2C address, as well as the display dimensions
+ *
+ * Required parameters
+ * @param i2c - A reference to an initialized I2C object
+ * @param RST - The Reset pin name
+ *
+ * Optional parameters
+ * @param i2cAddress - The i2c address of the display
+ * @param rawHeight - The vertical number of pixels for the display, defaults to 32
+ * @param rawWidth - The horizonal number of pixels for the display, defaults to 128
+ */
+ Adafruit_SSD1306_I2c(I2C &i2c, PinName RST, uint8_t i2cAddress = SSD_I2C_ADDRESS, uint8_t rawHeight = 32, uint8_t rawWidth = 128)
+ : Adafruit_SSD1306(RST, rawHeight, rawWidth)
+ , mi2c(i2c)
+ , mi2cAddress(i2cAddress)
+ {
+ begin();
+ splash();
+ display();
+ };
+
+ virtual void command(uint8_t c)
+ {
+ char buff[2];
+ buff[0] = 0; // Command Mode
+ buff[1] = c;
+ mi2c.write(mi2cAddress, buff, sizeof(buff));
+ }
+
+ virtual void data(uint8_t c)
+ {
+ char buff[2];
+ buff[0] = 0x40; // Data Mode
+ buff[1] = c;
+ mi2c.write(mi2cAddress, buff, sizeof(buff));
+ };
+
+protected:
+ virtual void sendDisplayBuffer()
+ {
+ char buff[17];
+ buff[0] = 0x40; // Data Mode
+
+ // send display buffer in 16 byte chunks
+ for(uint16_t i=0, q=buffer.size(); i<q; i+=16 )
+ { uint8_t x ;
+
+ // TODO - this will segfault if buffer.size() % 16 != 0
+ for(x=1; x<sizeof(buff); x++)
+ buff[x] = buffer[i+x-1];
+ mi2c.write(mi2cAddress, buff, sizeof(buff));
+ }
+ };
+
+ I2C &mi2c;
+ uint8_t mi2cAddress;
+};
+
+#endif \ No newline at end of file