Matthew Waddilove
Provides a interface to the Sparkfun serial LCD 16x2 display that is similar to the TextLCD interface.
SerialLCD.h@0:fa767f49f7e5, 2010-08-26 (annotated)
- Committer:
- giryan
- Date:
- Thu Aug 26 19:48:46 2010 +0000
- Revision:
- 0:fa767f49f7e5
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| giryan | 0:fa767f49f7e5 | 1 | #pragma once |
| giryan | 0:fa767f49f7e5 | 2 | |
| giryan | 0:fa767f49f7e5 | 3 | //! class that implements an interface like TextLCD, for a serial LCD :) |
| giryan | 0:fa767f49f7e5 | 4 | class SerialLCD : public Serial |
| giryan | 0:fa767f49f7e5 | 5 | { |
| giryan | 0:fa767f49f7e5 | 6 | public: |
| giryan | 0:fa767f49f7e5 | 7 | //! Constructor |
| giryan | 0:fa767f49f7e5 | 8 | SerialLCD(PinName tx, PinName rx) |
| giryan | 0:fa767f49f7e5 | 9 | : Serial(tx, rx) |
| giryan | 0:fa767f49f7e5 | 10 | { |
| giryan | 0:fa767f49f7e5 | 11 | baud(9600); |
| giryan | 0:fa767f49f7e5 | 12 | } |
| giryan | 0:fa767f49f7e5 | 13 | |
| giryan | 0:fa767f49f7e5 | 14 | //! Enum with command codes. |
| giryan | 0:fa767f49f7e5 | 15 | struct Codes |
| giryan | 0:fa767f49f7e5 | 16 | { |
| giryan | 0:fa767f49f7e5 | 17 | enum Enum |
| giryan | 0:fa767f49f7e5 | 18 | { |
| giryan | 0:fa767f49f7e5 | 19 | BackLight = 0x7C, |
| giryan | 0:fa767f49f7e5 | 20 | Command = 0xFE, |
| giryan | 0:fa767f49f7e5 | 21 | Clear = 0x01, |
| giryan | 0:fa767f49f7e5 | 22 | DisplayOn = 0x0C, |
| giryan | 0:fa767f49f7e5 | 23 | DisplayOff = 0x08, |
| giryan | 0:fa767f49f7e5 | 24 | UnderlineCursorOn = 0x0E, |
| giryan | 0:fa767f49f7e5 | 25 | UnderlineCursorOff = 0x0C, |
| giryan | 0:fa767f49f7e5 | 26 | BlinkingCursorOn = 0x0D, |
| giryan | 0:fa767f49f7e5 | 27 | BlinkingCursorOff = 0x0C, |
| giryan | 0:fa767f49f7e5 | 28 | CursorLeft = 0x10, |
| giryan | 0:fa767f49f7e5 | 29 | CursorRight = 0x14, |
| giryan | 0:fa767f49f7e5 | 30 | ScrollLeft = 0x18, |
| giryan | 0:fa767f49f7e5 | 31 | ScrollRight = 0x1C, |
| giryan | 0:fa767f49f7e5 | 32 | |
| giryan | 0:fa767f49f7e5 | 33 | Position = 0x80, |
| giryan | 0:fa767f49f7e5 | 34 | |
| giryan | 0:fa767f49f7e5 | 35 | }; |
| giryan | 0:fa767f49f7e5 | 36 | }; |
| giryan | 0:fa767f49f7e5 | 37 | |
| giryan | 0:fa767f49f7e5 | 38 | /** Locate to a screen column and row |
| giryan | 0:fa767f49f7e5 | 39 | * |
| giryan | 0:fa767f49f7e5 | 40 | * @param column The horizontal position from the left, indexed from 0 |
| giryan | 0:fa767f49f7e5 | 41 | * @param row The vertical position from the top, indexed from 0 |
| giryan | 0:fa767f49f7e5 | 42 | */ |
| giryan | 0:fa767f49f7e5 | 43 | void locate(int column, int row) |
| giryan | 0:fa767f49f7e5 | 44 | { |
| giryan | 0:fa767f49f7e5 | 45 | unsigned char const code = Codes::Position | ((row & 0x1) << 6) | (column % 0x3F); |
| giryan | 0:fa767f49f7e5 | 46 | |
| giryan | 0:fa767f49f7e5 | 47 | send_command(code); |
| giryan | 0:fa767f49f7e5 | 48 | } |
| giryan | 0:fa767f49f7e5 | 49 | |
| giryan | 0:fa767f49f7e5 | 50 | /** Clear the screen and locate to 0,0 */ |
| giryan | 0:fa767f49f7e5 | 51 | void cls() |
| giryan | 0:fa767f49f7e5 | 52 | { |
| giryan | 0:fa767f49f7e5 | 53 | send_command(Codes::Clear); |
| giryan | 0:fa767f49f7e5 | 54 | |
| giryan | 0:fa767f49f7e5 | 55 | locate(0,0); |
| giryan | 0:fa767f49f7e5 | 56 | } |
| giryan | 0:fa767f49f7e5 | 57 | |
| giryan | 0:fa767f49f7e5 | 58 | //!Send a command |
| giryan | 0:fa767f49f7e5 | 59 | void send_command(int const command_code) |
| giryan | 0:fa767f49f7e5 | 60 | { |
| giryan | 0:fa767f49f7e5 | 61 | putc(Codes::Command); |
| giryan | 0:fa767f49f7e5 | 62 | putc(command_code); |
| giryan | 0:fa767f49f7e5 | 63 | } |
| giryan | 0:fa767f49f7e5 | 64 | }; |