Adafruit_PCD8544.h

00001 /*********************************************************************
00002 This is a library for our Monochrome Nokia 5110 LCD Displays
00003 
00004   Pick one up today in the adafruit shop!
00005   ------> http://www.adafruit.com/products/338
00006 
00007 These displays use SPI to communicate, 4 or 5 pins are required to  
00008 interface
00009 
00010 Adafruit invests time and resources providing this open source code, 
00011 please support Adafruit and open-source hardware by purchasing 
00012 products from Adafruit!
00013 
00014 Written by Limor Fried/Ladyada  for Adafruit Industries.  
00015 BSD license, check license.txt for more information
00016 All text above, and the splash screen must be included in any redistribution
00017 
00018 Modified for MBED usage and tested with STM32F411RE on a Nucleo board.
00019 Hardware SPI only, tested using default arduino pin out D11/D13 for MOSI/SCLK, Support provided for different pin layouts
00020 by James Kidd 2014
00021 *********************************************************************/
00022 #include <stdint.h>
00023 #include <stdbool.h>
00024 #include "Adafruit_GFX.h"
00025 #include "mbed.h"
00026 #ifndef _ADAFRUIT_PCD8544_H
00027 #define _ADAFRUIT_PCD8544_H
00028 
00029 #define LCD_SPI_MODE 0x01
00030 #define LCD_SPI_BITS 0x08
00031 
00032 // Default to max SPI clock speed for PCD8544 of 4 mhz (16mhz / 4) for normal Arduinos.
00033 // This can be modified to change the clock speed if necessary (like for supporting other hardware).
00034 #define LCD_FREQ 400000
00035 #define PIN_RST  0x00
00036 #define PIN_SCE  0x01
00037 #define PIN_DC   0x02
00038 struct AdaLcdPins
00039 {
00040     PinName mosi;
00041     PinName miso;
00042     PinName sclk;
00043     PinName dc;
00044     PinName sce;
00045     PinName rst;
00046 };
00047 
00048 #define BLACK 1
00049 #define WHITE 0
00050 
00051 
00052 #define LCDWIDTH 84
00053 #define LCDHEIGHT 48
00054 
00055 #define PCD8544_POWERDOWN 0x04
00056 #define PCD8544_ENTRYMODE 0x02
00057 #define PCD8544_EXTENDEDINSTRUCTION 0x01
00058 
00059 #define PCD8544_DISPLAYBLANK 0x0
00060 #define PCD8544_DISPLAYNORMAL 0x4
00061 #define PCD8544_DISPLAYALLON 0x1
00062 #define PCD8544_DISPLAYINVERTED 0x5
00063 
00064 // H = 0
00065 #define PCD8544_FUNCTIONSET 0x20
00066 #define PCD8544_DISPLAYCONTROL 0x08
00067 #define PCD8544_SETYADDR 0x40
00068 #define PCD8544_SETXADDR 0x80
00069 
00070 // H = 1
00071 #define PCD8544_SETTEMP 0x04
00072 #define PCD8544_SETBIAS 0x10
00073 #define PCD8544_SETVOP 0x80
00074 
00075 // Default to max SPI clock speed for PCD8544 of 4 mhz (16mhz / 4) for normal Arduinos.
00076 // This can be modified to change the clock speed if necessary (like for supporting other hardware).
00077 //#define PCD8544_SPI_CLOCK_DIV SPI_CLOCK_DIV4
00078 
00079 class Adafruit_PCD8544 : public Adafruit_GFX {
00080  public:
00081   // Hardware SPI based on hardware controlled SCK (SCLK)13 and MOSI (DIN)11 pins. CS is still controlled by any IO pin.
00082   // NOTE: MISO and SS will be set as an input and output respectively, so be careful sharing those pins!
00083   Adafruit_PCD8544(PinName DC, PinName CS, PinName RST);
00084   //Untested choose clk/mosi pins
00085   Adafruit_PCD8544(PinName DC, PinName CS, PinName RST,PinName MOSI,PinName SCLK);
00086 
00087   void begin(uint8_t contrast = 40, uint8_t bias = 0x04);
00088   
00089   void command(uint8_t c);
00090   void data(uint8_t c);
00091   
00092   void setContrast(uint8_t val);
00093   void clearDisplay(void);
00094   void display();
00095   
00096   void drawPixel(int16_t x, int16_t y, uint16_t color);
00097   uint8_t getPixel(int8_t x, int8_t y);
00098 
00099  private:
00100     AdaLcdPins myPins;
00101   int8_t _din, _sclk, _dc, _rst, _cs;
00102   volatile uint8_t *mosiport, *clkport;
00103   uint8_t mosipinmask, clkpinmask;
00104 
00105   SPI* LcdSPI;
00106   DigitalOut** Pins;
00107   void spiWrite(uint8_t c);
00108   bool isHardwareSPI();
00109 };
00110 
00111 #endif