A basic LCD output test which uses the NXP LPC1768\'s SPI interface to display pixels, characters, and numbers on the Nokia 5110 or Nokia 3310 LCD.
Quick and versatile LCD screen control. Works as a great alternative to serial consoles!
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Inverted-color text function makes easy menus and borders
Uses a simple SetXY(char, char) function to draw data-plots or patterns
- Wiring -
LCD's connections from left to right:
1) +3.3v (V_lcd) - mbed's VOUT
2) GND - mbed's GND
3) SCE (chip select) - mbed's p8
4) RST (reset) - mbed's p9
5) DC (data/command) - mbed's p10
6) MOSI - mbed's p11
7) SCLK (serial clock) - mbed's p13
8) +3.3v (V_backlight) - mbed's VOUT
The code for this setup would be...
LcdPins myPins;
myPins.sce = p8;
myPins.rst = p9;
myPins.dc = p10;
myPins.mosi = p11;
myPins.miso = NC;
myPins.sclk = p13;
or more easily...
LcdPins myPins = { p11, NC, p13, p10, p8, p9 };
Init the NokiaLcd class using the above struct...
NokiaLcd myLcd( myPins );
then start the LCD using...
myLcd.InitLcd();
Simple text output is achieved with either of these functions:
void DrawString(char* str);
void DrawChar(char character);
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Better documentation, pre/post conditions, and extended draw functions are coming soon :)
Diff: NOKIA_5110.h
- Revision:
- 3:41063eb2a040
- Parent:
- 1:e25ab356dc9b
diff -r e448efb1fa68 -r 41063eb2a040 NOKIA_5110.h --- a/NOKIA_5110.h Fri Jan 10 19:57:40 2014 +0000 +++ b/NOKIA_5110.h Fri Jan 10 22:22:17 2014 +0000 @@ -2,7 +2,7 @@ // File: NOKIA_5110.h // Author: Chris Yan // Created: January, 2012 -// Revised: +// Revised: January, 2014 // Desc: Commands, fonts, and class for using a // Nokia 5110 LCD via the Phillips 8554 LCD driver. // @@ -36,6 +36,11 @@ // Command Instructions // H = 0 +#ifndef __NOKIA_5110_H__ +#define __NOKIA_5110_H__ + +// Command Instructions +// H = 0 #define CMD_DC_CLEAR_DISPLAY 0x08 #define CMD_DC_NORMAL_MODE 0x0C #define CMD_DC_FILL_DISPLAY 0x09 @@ -58,9 +63,11 @@ #define CMD_VOP_7V38 0xC8 // LCD Characteristics -#define LCD_FREQ 4000000 +#define LCD_FREQ 2000000 #define LCD_SPI_MODE 0x01 #define LCD_SPI_BITS 0x08 +#define LCD_X_MAX 84 +#define LCD_Y_MAX 48 #define PIN_RST 0x00 #define PIN_SCE 0x01 @@ -102,11 +109,17 @@ void ClearLcdMem(); void ShutdownLcd(); void SendFunction(char cmd); - void TestLcd(char test_pattern); + void SendDrawData(char data); + + public: + void DrawString(char* str); void DrawChar(char character); - void SendDrawData(char data); - + void SetXY(char x, char y); + void DrawFrameChar(char character); + void DrawNegFrameChar(char character); + char* NumToStr(int num); + private: char CreateFunctionChar(); void ResetLcd(); @@ -217,7 +230,9 @@ 0x2C, 0x30, 0x1C, 0x00, 0x00, 0x00, // y 90 0x24, 0x34, 0x2C, 0x24, 0x00, 0x00, // z 0x00, 0x00, 0x08, 0x3E, 0x22, 0x00, // { - 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, // | + 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, // | 0x22, 0x3E, 0x08, 0x00, 0x00, 0x00, // } 0x10, 0x08, 0x18, 0x10, 0x08, 0x00, // ~ 95 }; + +#endif