Krissi Yan / Mbed 2 deprecated Nokia5110

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.

Dependencies:   mbed NOKIA_5110

Quick and versatile LCD screen control. Works as a great alternative to serial consoles!

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/media/uploads/Fuzball/debug_gui_1.jpg

Inverted-color text function makes easy menus and borders

/media/uploads/Fuzball/oscil_1.jpg

Uses a simple SetXY(char, char) function to draw data-plots or patterns

- Wiring -

/media/uploads/Fuzball/debug_gui_2.jpg

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.cpp

Revision:
0:fbba596f1039
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NOKIA_5110.cpp	Mon Jan 16 19:47:48 2012 +0000
@@ -0,0 +1,128 @@
+// Project: Fuzzy LCD Voltmeter
+// File: NOKIA_5110.cpp
+// Author: Chris Yan
+// Created: January, 2012
+// Revised: 
+//  Desc: Supporting code for the NokiaLcd class
+
+#include "NOKIA_5110.h"
+#include "mbed.h"
+
+NokiaLcd::NokiaLcd(LcdPins pinout)
+{
+    // SPI
+    LcdSpi = new SPI(pinout.mosi, pinout.miso, pinout.sclk);
+    LcdSpi->format(LCD_SPI_BITS, LCD_SPI_MODE);
+    LcdSpi->frequency(LCD_FREQ);
+    
+    // Control Pins
+    Pins = new DigitalOut*[3];
+    Pins[PIN_RST]   = new DigitalOut(pinout.rst);
+    Pins[PIN_SCE]   = new DigitalOut(pinout.sce);
+    Pins[PIN_DC]    = new DigitalOut(pinout.dc);
+    
+    // Initial Command Instructions, note the initial command mode
+    FunctionSet.V   = CMD_FS_HORIZONTAL_MODE;
+    FunctionSet.H   = CMD_FS_EXTENDED_MODE;
+    FunctionSet.PD  = CMD_FS_ACTIVE_MODE;
+    FunctionChar    = CreateFunctionChar();
+    
+    TempControlChar = CMD_TC_TEMP_2;
+    DispControlChar = CMD_DC_NORMAL_MODE;
+    BiasChar        = CMD_BI_MUX_48;
+    VopChar         = CMD_VOP_7V38;
+}
+
+void NokiaLcd::ShutdownLcd()
+{
+    FunctionSet.PD  = CMD_FS_POWER_DOWN_MODE;
+
+    ClearLcdMem();
+    SendFunction( CMD_DC_CLEAR_DISPLAY );
+    SendFunction( CreateFunctionChar() );
+}
+
+void NokiaLcd::ClearLcdMem()
+{
+    Pins[PIN_SCE]->write(0);    // Chip Select goes low
+    Pins[PIN_DC]->write(1);     // Data/CMD goes high
+    
+    for(int tick = 0; tick <= 503; tick++)
+        LcdSpi->write(0x00);
+        
+    Pins[PIN_SCE]->write(1);    // Chip Select goes high
+}
+
+void NokiaLcd::TestLcd(char test_pattern)
+{
+    Pins[PIN_SCE]->write(0);    // Chip Select goes low
+    Pins[PIN_DC]->write(1);     // Data/CMD goes high
+    
+    for(int tick = 0; tick <= 503; tick++)
+        LcdSpi->write(test_pattern);         // Command gets sent
+    
+    Pins[PIN_SCE]->write(1);    // Chip Select goes high
+}
+
+void NokiaLcd::InitLcd()
+{
+    ResetLcd();
+    
+    // Redefine the FunctionChar in case it has changed
+    FunctionSet.V   = CMD_FS_HORIZONTAL_MODE;
+    FunctionSet.H   = CMD_FS_EXTENDED_MODE;
+    FunctionSet.PD  = CMD_FS_ACTIVE_MODE;
+    SendFunction( CreateFunctionChar() );   // Extended CMD set
+    SendFunction( VopChar );                // | Vop
+    SendFunction( TempControlChar );        // | Temp
+    SendFunction( BiasChar );               // | Bias
+
+    FunctionSet.H   = CMD_FS_BASIC_MODE;
+    SendFunction( CreateFunctionChar() );   // Basic CMD set
+    SendFunction( DispControlChar );        // | Display Mode
+    
+    ClearLcdMem();
+}
+
+void NokiaLcd::ResetLcd()
+{
+    Pins[PIN_RST]->write(0);    // Reset goes low
+    Pins[PIN_RST]->write(1);    // Reset goes high
+}
+
+char NokiaLcd::CreateFunctionChar()
+{
+    return ( 0x20 | FunctionSet.PD | FunctionSet.V | FunctionSet.H );
+}
+
+void NokiaLcd::SendDrawData(char data)
+{
+    Pins[PIN_SCE]->write(0);    // Chip Select goes low
+    Pins[PIN_DC]->write(1);     // Data/CMD goes high
+    
+    LcdSpi->write(data);         // Command gets sent
+    
+    Pins[PIN_SCE]->write(1);    // Chip Select goes high
+}
+
+void NokiaLcd::DrawChar(char character)
+{
+    for( int i = 0; i < 6; i++)
+        SendDrawData( FONT_6x6[ ((character - 32)*6) + i] );
+}
+
+void NokiaLcd::SendFunction(char cmd) //TODO:Detection of what H should be
+{
+    Pins[PIN_SCE]->write(0);    // Chip Select goes low
+    Pins[PIN_DC]->write(0);     // Data/CMD goes low
+    
+    LcdSpi->write(cmd);         // Command gets sent
+    
+    Pins[PIN_DC]->write(1);     // Data/CMD goes back to Data mode
+    Pins[PIN_SCE]->write(1);    // Chip Select goes high
+}
+
+NokiaLcd::~NokiaLcd()
+{
+    ShutdownLcd();
+}