Dependents: vmConfort_v6 Programski_zadatak_23 Projektni_zadatak_23 tempivolt
Display1602.h@1:fc4c861451e1, 2012-04-08 (annotated)
- Committer:
- RichardUK
- Date:
- Sun Apr 08 12:51:51 2012 +0000
- Revision:
- 1:fc4c861451e1
- Parent:
- 0:6c0e68e0d876
Fixed a bug in the printf func.
Added comments.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
RichardUK | 0:6c0e68e0d876 | 1 | |
RichardUK | 0:6c0e68e0d876 | 2 | #ifndef __DISPLAY1602_H__ |
RichardUK | 0:6c0e68e0d876 | 3 | #define __DISPLAY1602_H__ |
RichardUK | 0:6c0e68e0d876 | 4 | |
RichardUK | 0:6c0e68e0d876 | 5 | #include "mbed.h" |
RichardUK | 0:6c0e68e0d876 | 6 | #include <stdarg.h> |
RichardUK | 0:6c0e68e0d876 | 7 | |
RichardUK | 0:6c0e68e0d876 | 8 | /* |
RichardUK | 0:6c0e68e0d876 | 9 | INITIALIZING BY INSTRUCTION |
RichardUK | 0:6c0e68e0d876 | 10 | 1) 8-bit interface mode (Condition: fosc = 270KHZ) |
RichardUK | 0:6c0e68e0d876 | 11 | |
RichardUK | 0:6c0e68e0d876 | 12 | Codes |
RichardUK | 0:6c0e68e0d876 | 13 | N = 0 1-line mode , 1 2-line mode |
RichardUK | 0:6c0e68e0d876 | 14 | D = 0 display off, 1 display on |
RichardUK | 0:6c0e68e0d876 | 15 | C = 0 cursor off, 1 cursor on |
RichardUK | 0:6c0e68e0d876 | 16 | B = 0 blink off, 1 blink on |
RichardUK | 0:6c0e68e0d876 | 17 | I/D = 0 decrement mode, 1 increment mode |
RichardUK | 0:6c0e68e0d876 | 18 | SH = 0 entire shift off, 1 entire shift on |
RichardUK | 0:6c0e68e0d876 | 19 | |
RichardUK | 0:6c0e68e0d876 | 20 | |
RichardUK | 0:6c0e68e0d876 | 21 | *** Power on |
RichardUK | 0:6c0e68e0d876 | 22 | Wait for more than 30 ms after VDD rises to 4.5 v |
RichardUK | 0:6c0e68e0d876 | 23 | |
RichardUK | 0:6c0e68e0d876 | 24 | *** Function set |
RichardUK | 0:6c0e68e0d876 | 25 | RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 |
RichardUK | 0:6c0e68e0d876 | 26 | 0 0 0 0 1 1 N D X X |
RichardUK | 0:6c0e68e0d876 | 27 | Wait for more than 39 μs |
RichardUK | 0:6c0e68e0d876 | 28 | |
RichardUK | 0:6c0e68e0d876 | 29 | *** Display ON/OFF Control |
RichardUK | 0:6c0e68e0d876 | 30 | RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 |
RichardUK | 0:6c0e68e0d876 | 31 | 0 0 0 0 0 0 1 D C B |
RichardUK | 0:6c0e68e0d876 | 32 | Wait for more than 39 μs |
RichardUK | 0:6c0e68e0d876 | 33 | |
RichardUK | 0:6c0e68e0d876 | 34 | |
RichardUK | 0:6c0e68e0d876 | 35 | *** Display Clear |
RichardUK | 0:6c0e68e0d876 | 36 | RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 |
RichardUK | 0:6c0e68e0d876 | 37 | 0 0 0 0 0 0 0 0 0 1 |
RichardUK | 0:6c0e68e0d876 | 38 | Wait for more than 1.53 ms |
RichardUK | 0:6c0e68e0d876 | 39 | |
RichardUK | 0:6c0e68e0d876 | 40 | *** Entry Mode Set |
RichardUK | 0:6c0e68e0d876 | 41 | RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 |
RichardUK | 0:6c0e68e0d876 | 42 | 0 0 0 0 0 0 0 1 I/D SH |
RichardUK | 0:6c0e68e0d876 | 43 | |
RichardUK | 0:6c0e68e0d876 | 44 | *** Initialization end *** |
RichardUK | 0:6c0e68e0d876 | 45 | |
RichardUK | 0:6c0e68e0d876 | 46 | |
RichardUK | 0:6c0e68e0d876 | 47 | */ |
RichardUK | 0:6c0e68e0d876 | 48 | |
RichardUK | 1:fc4c861451e1 | 49 | /** Basic bit of code for using a standard 1602 display in 8 bit mode. |
RichardUK | 0:6c0e68e0d876 | 50 | * Written by Richard e Collins. |
RichardUK | 0:6c0e68e0d876 | 51 | * Basic bit of code for using a standard 1602 display in 8 bit mode. |
RichardUK | 0:6c0e68e0d876 | 52 | * 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. |
RichardUK | 0:6c0e68e0d876 | 53 | * |
RichardUK | 0:6c0e68e0d876 | 54 | * Example use. |
RichardUK | 0:6c0e68e0d876 | 55 | * Display1602 display(p10,p11,p12,p13,p14,p15,p16,p17,p18,p19,p20); |
RichardUK | 0:6c0e68e0d876 | 56 | * display.SetXY(0,0); |
RichardUK | 0:6c0e68e0d876 | 57 | * display.Print("Hello world"); |
RichardUK | 0:6c0e68e0d876 | 58 | */ |
RichardUK | 0:6c0e68e0d876 | 59 | struct Display1602 |
RichardUK | 0:6c0e68e0d876 | 60 | { |
RichardUK | 1:fc4c861451e1 | 61 | /** |
RichardUK | 1:fc4c861451e1 | 62 | * Constructor, here you state the oins used to read and write data on and the control pins. |
RichardUK | 1:fc4c861451e1 | 63 | * @param registerSelect This is the pin used to select if you are sending data or setting a control register. |
RichardUK | 1:fc4c861451e1 | 64 | * @param readWriteSelect The pin to state if you are reading or writing data / register. |
RichardUK | 1:fc4c861451e1 | 65 | * @param d0 -> d7. The eight pins for the data to be either written to the display or a register. |
RichardUK | 1:fc4c861451e1 | 66 | */ |
RichardUK | 0:6c0e68e0d876 | 67 | Display1602(PinName registerSelect,PinName readWriteSelect,PinName readWriteEnable,PinName d0,PinName d1,PinName d2,PinName d3,PinName d4,PinName d5,PinName d6,PinName d7) ; |
RichardUK | 1:fc4c861451e1 | 68 | |
RichardUK | 1:fc4c861451e1 | 69 | /** |
RichardUK | 1:fc4c861451e1 | 70 | * Clears the display. |
RichardUK | 1:fc4c861451e1 | 71 | */ |
RichardUK | 0:6c0e68e0d876 | 72 | void Clear(); |
RichardUK | 0:6c0e68e0d876 | 73 | |
RichardUK | 1:fc4c861451e1 | 74 | /** |
RichardUK | 1:fc4c861451e1 | 75 | * Prints the text to the display, will limit the chars read by 16 chars or hitting a null terminator, which ever comes first. |
RichardUK | 1:fc4c861451e1 | 76 | * Advances the cursor pos. |
RichardUK | 1:fc4c861451e1 | 77 | */ |
RichardUK | 0:6c0e68e0d876 | 78 | void Print(const char *text); |
RichardUK | 0:6c0e68e0d876 | 79 | |
RichardUK | 1:fc4c861451e1 | 80 | /** |
RichardUK | 1:fc4c861451e1 | 81 | * handy printf funtion for displaying text. |
RichardUK | 1:fc4c861451e1 | 82 | * Advances the cursor pos. |
RichardUK | 1:fc4c861451e1 | 83 | */ |
RichardUK | 0:6c0e68e0d876 | 84 | void printf(const char *format,...); |
RichardUK | 0:6c0e68e0d876 | 85 | |
RichardUK | 1:fc4c861451e1 | 86 | /** |
RichardUK | 1:fc4c861451e1 | 87 | *Sets the cusor X Y pos. |
RichardUK | 1:fc4c861451e1 | 88 | */ |
RichardUK | 0:6c0e68e0d876 | 89 | void SetXY(int x,int y); |
RichardUK | 0:6c0e68e0d876 | 90 | |
RichardUK | 0:6c0e68e0d876 | 91 | private: |
RichardUK | 0:6c0e68e0d876 | 92 | DigitalOut rs; //Register select, high value in data is data char data, when low is a command. |
RichardUK | 0:6c0e68e0d876 | 93 | DigitalOut rw; //Data direction, high read operation, low is write operation. |
RichardUK | 0:6c0e68e0d876 | 94 | DigitalOut e; //When high the value in data is read from or written to the register selected. |
RichardUK | 0:6c0e68e0d876 | 95 | BusOut data; //The data sent. |
RichardUK | 0:6c0e68e0d876 | 96 | |
RichardUK | 0:6c0e68e0d876 | 97 | void SendCommand(int cmd); |
RichardUK | 0:6c0e68e0d876 | 98 | |
RichardUK | 0:6c0e68e0d876 | 99 | void SendChar(char c); |
RichardUK | 0:6c0e68e0d876 | 100 | }; |
RichardUK | 0:6c0e68e0d876 | 101 | |
RichardUK | 0:6c0e68e0d876 | 102 | #endif //#ifndef __DISPLAY1602_H__ |