Diff: NHD_0420DZW_OLED.h

Revision:

0:91420dff6791

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NHD_0420DZW_OLED.h	Wed Oct 26 12:19:43 2016 +0000
@@ -0,0 +1,139 @@
+#ifndef _NHD_0420DZW_OLED_H_
+#define _NHD_0420DZW_OLED_H_
+
+/**
+* @file NHD_0420DZW_OLED.h
+* @brief this header file will contain the definitions to interface the New Haven
+* NHD-0420DZW-AY5 display using a 4-wire software spi bus bus.
+* @author Jack Berkhout
+*
+* @date 2016-10-21
+*/
+
+/**
+* Class for the New Haven NHD-0420DZW-AY5 SPI LCD 4x20
+* @author Jack Berkhout
+* @date 2016-10-21
+*/
+
+#include "mbed.h"
+//#include "TextDisplay.h"
+
+#define LCD_COMMAND 0
+#define LCD_DATA    1
+#define LCD_WRITE   0
+#define LCD_READ    1
+
+#define LCD_CLEAR_DISPLAY   0x01
+#define LCD_RETURN_HOME     0x02
+#define LCD_CURSOR_INCR     0x06
+#define LCD_DISPLAY_OFF     0x08
+#define LCD_DISPLAY_ON      0x0C
+#define LCD_FUNCTION_SET    0x38
+#define LCD_BUSSY_FLAG      0x80
+#define LCD_NUMBER_OF_CHARACTERS 20
+#define LCD_NUMBER_OF_LINES       4
+
+#define LCD_LINE_1 0x80
+#define LCD_LINE_2 0xC0
+#define LCD_LINE_3 0x94
+#define LCD_LINE_4 0xD4
+
+#define LCD_CLOCK_PULSE_LENGTH 1
+#define LCD_RS_BIT_MASK 0x0200
+#define LCD_Rw_BIT_MASK 0x0100
+
+/* set CGRAM addr */
+#define LCD_CGRAM(n)        (0x40 + ((n) << 3))
+// *.... 16
+// **... 24
+// ***.. 28
+// ****. 30
+// ***** 31
+// *..*. 18
+// *..*. 18
+// .***. 14
+
+//#define CHARACTERBYTES { \
+//     0,  0,  0,  0,  0,  0,  0,  0, \
+//    16, 16, 16, 16, 16, 16, 16, 16, \
+//    24, 24, 24, 24, 24, 24, 24, 24, \
+//    28, 28, 28, 28, 28, 28, 28, 28, \
+//    30, 30, 30, 30, 30, 30, 30, 30, \
+//    31, 31, 31, 31, 31, 31, 31, 31, \
+//     1,  1,  1,  1,  1,  1,  1,  1 \
+//}
+
+#define CHARACTERBYTES { \
+     0,  0,  0,  0,  0,  0,  0,  0, \
+     0,  0,  0,  16,  16, 0, 0, 0, \
+     0,  0,  0,  24,  24, 0, 0, 0, \
+     0,  0,  0,  28,  28, 0, 0, 0, \
+     0,  0,  0,  30,  30, 0, 0, 0, \
+     0,  0,  0,  31,  31, 0, 0, 0, \
+     0,  0,  0,  0,  0,  0,  0,  0, \
+     0,  0,  0,  0,  0,  0,  0,  0 \
+}
+
+//class NHD_0420DZW_OLED {
+class NHD_0420DZW_OLED : public Stream {
+public:
+    /**
+    * @brief Create a new Class to interface to an NH-0216K3Z-NSW-BBW 2x16 Character LCD from New Haven
+    **/
+    NHD_0420DZW_OLED(PinName mosi, PinName miso, PinName sck, PinName cs, const char *name);
+
+    void init(void);
+
+    void cls(void);
+    void cursorHome(void);
+    
+    void writeCharacter(int column, int row, int c);
+    void writeCharacter(char character);
+    void writeString(char *charString);
+    void writeString(int y, char *charString);
+    void writeString(int x, int y, char *charString);
+    void clearLine(int y);
+    void clearRegion(int x, int y, int length);
+    void locate(int X, int Y);
+    void drawBar(int X, int Y, int Value, int Max);
+
+    virtual bool claim (FILE *stream);
+
+private:
+    DigitalOut _lcd_csb;
+    DigitalOut _lcd_scl;
+    DigitalOut _lcd_sdi;
+    DigitalIn  _lcd_sdo;  
+
+    void writeCommand(int data);
+    void writeData(int data);
+    int readAddress(void);
+    void waitBusy(void);
+    int readBusyFlag(void);
+    void writeSerial(int rs, int rw, int data);
+    int serialInstruction(int rs, int rw, int data1, int data2);
+    int serialData(int rs, int rw, int data1, int data2);
+    int clockSerial(int dataOut, int bits);
+    void selectSerial(bool select);
+
+// https://developer.mbed.org/users/4180_1/notebook/how-to-get-printf-to-work-in-a-new-display-driver-/
+//and add this to the end of the class
+protected:
+    //used by printf - supply a new _putc virtual function for the new device
+    virtual int _putc(int c) {
+        writeData(c); //your new LCD put to print an ASCII character on LCD
+        return 0;
+    };
+//assuming no reads from LCD
+    virtual int _getc() {
+        return -1;
+    }
+
+    // character location
+    uint16_t _column;
+    uint16_t _row;
+    char *_path;
+
+};
+#endif
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