Diff: ELEC351_LIBRARY/displayMaster/displayMaster.hpp

Revision:

0:c66224a27cf8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ELEC351_LIBRARY/displayMaster/displayMaster.hpp	Wed Jan 10 09:49:43 2018 +0000
@@ -0,0 +1,54 @@
+#ifndef displayMaster
+#define displayMaster
+
+#define defaultD1 D7    // Data Bus LSB
+#define defaultD2 D6    // |
+#define defaultD3 D4    // |
+#define defaultD4 D2    // Data Bus MSB
+#define defaultRS D9    // Register Select
+#define defaultRW D0    // Read/Write Select
+#define defaultEN D8    // Enable
+
+/* Instructions on using the 16x2 LCD panel are found here:
+[https://www.8051projects.net/lcd-interfacing/lcd-4-bit.php]                  */
+/* N.B. I did the code from scratch since I do not have the code from ELEC230 */
+/* N.B. This class contains blocking function so it goes into its own thread  */
+
+// Custom 16x2 LCD display driver (4 bit mode only). Works via character stream
+class C_displayMaster: public Stream 
+{
+protected:
+    
+    // Control line commands
+    enum REGISTER {INSTRUCTION, DATA};
+    enum MODE     {WRITE, READ};
+    enum VALIDATE {DISABLE, ENABLE};
+
+    // Control line types
+    BusInOut      _commsBus;
+    DigitalOut    _registerSel;
+    DigitalOut    _modeSel;
+    DigitalOut    _enable;
+    
+    // Private member variables
+    int _col;                   // Cursor coloumn
+    int _row;                   // Cursor row
+    int _ADR;                   // Cursor DDRAM address 
+    
+    // Private member functions
+    void writeChar(int, bool);  // Write character to display
+    void busyCheck();           // Chek if the display is busy
+    void calcDDRAM(int, int);   // Calculate address in DDRAm for row and coloumn
+    
+    virtual int _getc();        // Virtual reading function for character Stream (not needed by user so it is protected)
+    
+public:
+    // Assign deafault pin names if they are not specified when constructor is run
+    C_displayMaster(PinName D1 = defaultD1, PinName D2 = defaultD2, PinName D3 = defaultD3, PinName D4 = defaultD4, PinName RS = defaultRS, PinName RW = defaultRW, PinName EN = defaultEN);
+   
+    void clear();                 // Clear display
+    virtual int _putc(int value); // Virtual writing function for character Stream 
+
+};
+
+#endif
\ No newline at end of file