Diff: Display1602/Display1602.h

Revision:

0:a5367bd4e404

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Display1602/Display1602.h	Tue May 20 15:11:16 2014 +0000
@@ -0,0 +1,102 @@
+
+#ifndef __DISPLAY1602_H__
+#define __DISPLAY1602_H__
+
+#include "mbed.h"
+#include <stdarg.h>
+
+/*
+INITIALIZING BY INSTRUCTION
+1) 8-bit interface mode (Condition: fosc = 270KHZ)
+
+Codes
+N = 0 1-line mode , 1 2-line mode
+D = 0 display off, 1 display on
+C = 0 cursor off, 1 cursor on
+B = 0 blink off, 1 blink on
+I/D = 0 decrement mode, 1 increment mode
+SH = 0 entire shift off, 1 entire shift on
+
+
+***        Power on
+Wait for more than 30 ms after VDD rises to 4.5 v
+
+***        Function set
+RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
+ 0  0   0   0   1   1   N   D   X   X
+Wait for more than 39 &#956;s
+
+***        Display ON/OFF Control
+RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
+ 0  0   0   0   0   0   1   D   C   B
+Wait for more than 39 &#956;s
+
+
+***        Display Clear
+RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
+ 0  0   0   0   0   0   0   0   0   1
+Wait for more than 1.53 ms
+
+***        Entry Mode Set
+RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
+ 0   0  0   0   0   0   0   1  I/D SH
+
+***        Initialization end     ***
+
+
+*/
+
+/** Basic bit of code for using a standard 1602 display in 8 bit mode.
+ * Written by Richard e Collins.
+ * Basic bit of code for using a standard 1602 display in 8 bit mode.
+ * When wiring one of these displays up make sure the power to the LCD on pin 3 is correct, too high and it will not display anything. About 0.2v is good, I use a POT to set it.
+ *
+ * Example use.
+ *   Display1602 display(p10,p11,p12,p13,p14,p15,p16,p17,p18,p19,p20);
+ *   display.SetXY(0,0);
+ *   display.Print("Hello world");
+ */
+struct Display1602
+{
+    /**
+     * Constructor, here you state the oins used to read and write data on and the control pins.
+     * @param registerSelect This is the pin used to select if you are sending data or setting a control register.
+     * @param readWriteSelect The pin to state if you are reading or writing data / register.
+     * @param d0 -> d7. The eight pins for the data to be either written to the display or a register.
+     */
+    Display1602(PinName registerSelect,PinName readWriteSelect,PinName readWriteEnable,PinName d0,PinName d1,PinName d2,PinName d3,PinName d4,PinName d5,PinName d6,PinName d7) ;
+
+    /**
+     * Clears the display.
+     */    
+    void Clear();
+    
+    /**
+     * Prints the text to the display, will limit the chars read by 16 chars or hitting a null terminator, which ever comes first.
+     * Advances the cursor pos.
+     */
+    void Print(const char *text);
+    
+    /**
+     * handy printf funtion for displaying text.
+     * Advances the cursor pos.
+     */
+    void printf(const char *format,...);
+
+    /**
+     *Sets the cusor X Y pos.
+     */
+    void SetXY(int x,int y);
+    
+private:
+    DigitalOut rs;     //Register select, high value in data is data char data, when low is a command.
+    DigitalOut rw;    //Data direction, high read operation, low is write operation.
+    DigitalOut e;    //When high the value in data is read from or written to the register selected. 
+    BusOut data;    //The data sent.
+    
+    void SendCommand(int cmd);
+    
+    void SendChar(char c);
+};
+
+#endif //#ifndef __DISPLAY1602_H__