File content as of revision 0:4d2abaa4de64:

/*********************************************************************
This is a library for our Monochrome Nokia 5110 LCD Displays

  Pick one up today in the adafruit shop!
  ------> http://www.adafruit.com/products/338

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 for MBED usage and tested with STM32F411RE on a Nucleo board.
Hardware SPI only, tested using default arduino pin out D11/D13 for MOSI/SCLK, Support provided for different pin layouts
by James Kidd 2014
*********************************************************************/
#include <stdint.h>
#include <stdbool.h>
#include "Adafruit_GFX.h"
#include "mbed.h"
#ifndef _ADAFRUIT_PCD8544_H
#define _ADAFRUIT_PCD8544_H

#define LCD_SPI_MODE 0x01
#define LCD_SPI_BITS 0x08

// Default to max SPI clock speed for PCD8544 of 4 mhz (16mhz / 4) for normal Arduinos.
// This can be modified to change the clock speed if necessary (like for supporting other hardware).
#define LCD_FREQ 400000
#define PIN_RST  0x00
#define PIN_SCE  0x01
#define PIN_DC   0x02
struct AdaLcdPins
{
    PinName mosi;
    PinName miso;
    PinName sclk;
    PinName dc;
    PinName sce;
    PinName rst;
};

#define BLACK 1
#define WHITE 0


#define LCDWIDTH 84
#define LCDHEIGHT 48

#define PCD8544_POWERDOWN 0x04
#define PCD8544_ENTRYMODE 0x02
#define PCD8544_EXTENDEDINSTRUCTION 0x01

#define PCD8544_DISPLAYBLANK 0x0
#define PCD8544_DISPLAYNORMAL 0x4
#define PCD8544_DISPLAYALLON 0x1
#define PCD8544_DISPLAYINVERTED 0x5

// H = 0
#define PCD8544_FUNCTIONSET 0x20
#define PCD8544_DISPLAYCONTROL 0x08
#define PCD8544_SETYADDR 0x40
#define PCD8544_SETXADDR 0x80

// H = 1
#define PCD8544_SETTEMP 0x04
#define PCD8544_SETBIAS 0x10
#define PCD8544_SETVOP 0x80

// Default to max SPI clock speed for PCD8544 of 4 mhz (16mhz / 4) for normal Arduinos.
// This can be modified to change the clock speed if necessary (like for supporting other hardware).
//#define PCD8544_SPI_CLOCK_DIV SPI_CLOCK_DIV4

class Adafruit_PCD8544 : public Adafruit_GFX {
 public:
  // Hardware SPI based on hardware controlled SCK (SCLK)13 and MOSI (DIN)11 pins. CS is still controlled by any IO pin.
  // NOTE: MISO and SS will be set as an input and output respectively, so be careful sharing those pins!
  Adafruit_PCD8544(PinName DC, PinName CS, PinName RST);
  //Untested choose clk/mosi pins
  Adafruit_PCD8544(PinName DC, PinName CS, PinName RST,PinName MOSI,PinName SCLK);

  void begin(uint8_t contrast = 40, uint8_t bias = 0x04);
  
  void command(uint8_t c);
  void data(uint8_t c);
  
  void setContrast(uint8_t val);
  void clearDisplay(void);
  void display();
  
  void drawPixel(int16_t x, int16_t y, uint16_t color);
  uint8_t getPixel(int8_t x, int8_t y);

 private:
    AdaLcdPins myPins;
  int8_t _din, _sclk, _dc, _rst, _cs;
  volatile uint8_t *mosiport, *clkport;
  uint8_t mosipinmask, clkpinmask;

  SPI* LcdSPI;
  DigitalOut** Pins;
  void spiWrite(uint8_t c);
  bool isHardwareSPI();
};

#endif