Diff: LCD_ST7066U.h

Revision:

0:3b4b05d44398

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_ST7066U.h	Mon Apr 18 18:42:24 2016 +0000
@@ -0,0 +1,77 @@
+/*
+ *     File Name: LCD_ST7066U.h
+ *       Version: 0.1
+ *          Date: 2016-04-1i
+ *        Author: Luis F Rodriguez
+ *       Company: BIOS (Biological Innovation and Optimization Services)
+ *
+ *   Description: This is the header file to be included in any project utilizing a
+ *                16x2 LCD screen based on the ST7066U processor being controlled with
+ *                an mbed-enabled LPC11U68 with a 4-bit interface. It utilizes the
+ *                resources provided by the mbed platform to abstract the functioning
+ *                underlying this processor.
+ *
+ */
+
+#ifndef LCD_ST7066U_H
+#define LCD_ST7066U_H
+
+/*
+ * MARK: Include Files
+ * Any header files to be included in the project are found in this section.
+ */
+ 
+#include "mbed.h"
+
+/*
+ * MARK: Macro Definition
+ *   The defitions found below were included to increase readability of the code, as it gives
+ *   each command a name instead of just the value itself.
+ */
+ 
+#define wakeUp 0x30       // 
+#define functionSet 0x28 // Sets the interface data type to 4 bits, 2 lines, and font size 5x8. 0x28 = 0010 1000
+#define returnHome 0x02    // Sets the cursor to the beginning of the screen. 0x02 = 0000 0010
+#define setCursor 0x10 // Sets cursor moving and display shift, and direction without changing DDRAM data. 0x10 = 0001 0000
+#define setDisplay 0x0C   // Sets Entire Display on, Display on, Cursor on. 0x0C = 0000 1011
+#define entryModeSet 0x06 // Sets Entry Mode. 0x06 = 0000 0110
+#define clearDisplay 0x01 // Resets the whole display to blank
+
+/*
+ * MARK: Class Definition
+ *   The class defined below abstracts the processes that control an LCD screen
+ *   running on the ST7066U processor. The public functions are for writing a full
+ *   line, writing a character at a specific location and clearing the full screen.
+ */
+ 
+class LCD {
+public:
+    LCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7);
+    void clear();
+    void write(const char* text);
+    void writeLine(const char* text, int line);
+    void writeCharacter(const char c, int row, int column);
+    void writeCharacters(const char* text, int row, int column);
+private:
+    void init();
+    void startUp();
+    void locate(int row, int column);
+    void writeCharacter(char value);
+    void writeCommand(char value);
+    void writeData(char value);
+    void writeTime();
+    void character (int row, int column, char c);
+    int rows() {return 2;}
+    int columns() {return 16;}
+    int address(int row, int column);
+    DigitalOut _rs;
+    DigitalOut _e;
+    DigitalOut _d4;
+    DigitalOut _d5;
+    DigitalOut _d6;
+    DigitalOut _d7;
+    int _row;
+    int _column;
+};
+
+#endif
\ No newline at end of file