Diff: NOKIA_5110.cpp

Revision:

0:99fdd85b4929

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NOKIA_5110.cpp	Sat Jun 14 02:25:52 2014 +0000
@@ -0,0 +1,173 @@
+// Project: Nokia5110 - Controlling a NK5110 display from an NXP LPC1768
+// File: NOKIA_5110.cpp
+// Author: Chris Yan
+// Created: January, 2012
+// Revised: January, 2014
+//  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()
+{
+    for(int tick = 0; tick <= 503; tick++)
+        LcdSpi->write(0x00);
+}
+
+void NokiaLcd::TestLcd(char test_pattern)
+{
+    for(int tick = 0; tick <= 503; tick++)
+        LcdSpi->write(test_pattern);         // Command gets sent
+}
+
+void NokiaLcd::InitLcd()
+{
+    ResetLcd();
+    Pins[PIN_SCE]->write(0);     // Chip Select goes low
+    
+    // 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();
+    Pins[PIN_DC]->write(1);     // Data/CMD goes back to Data mode
+}
+
+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)
+{
+    LcdSpi->write(data);         // Command gets sent
+}
+
+void NokiaLcd::DrawChar(char character)
+{
+    for( int i = 0; i < 6; i++)
+        SendDrawData( FONT_6x6[ ((character - 32)*6) + i] );
+}
+
+void NokiaLcd::DrawString(char* s)
+{
+    char len = strlen(s);
+    for( int idx = 0; idx < len; idx++ )
+    {
+        for( int i = 0; i < 6; i++)
+            SendDrawData( FONT_6x6[ ((s[idx] - 32)*6) + i] );
+    }
+}
+
+void NokiaLcd::DrawFrameChar(char character)
+{
+    for( int i = 0; i < 6; i++)
+        SendDrawData((( FONT_6x6[ ((character - 32)*6) + i]  ) << 1 ) | 0x81);
+}
+
+void NokiaLcd::DrawNegFrameChar(char character)
+{
+    for( int i = 0; i < 6; i++)
+        SendDrawData(~(( FONT_6x6[ ((character - 32)*6) + i]  ) << 1 ) | 0x81);
+}
+
+char* NokiaLcd::NumToStr(int num)
+{
+    if(num <= 0)
+        return "0";
+
+    double length = 0;
+    int tlen = 0;
+    int temp = 1;
+    char c;
+    
+    // Get number of digits
+    while( temp <= num )
+    {
+        temp *= 10;
+        length++;
+    }
+    tlen = length;
+    char* numString = new char[tlen+1];
+    
+    // Convert each place in number to a stand-alone representative number
+    temp = 0;
+    for(int idx = pow(10, length); idx>1; idx = (idx/10))
+    {
+        c = (char)( ((num % idx)-(num % (idx/10)))/(idx/10) + 48);
+        numString[temp] = c;
+        temp++;
+    }
+    numString[temp] = '\0';
+    return numString;
+}
+
+void NokiaLcd::SetXY(char x, char y)
+{
+    if( (x > 83) || (y > 5) )
+        return;
+
+    SendFunction( x | 0x80 );
+    SendFunction( y | 0x40 );
+}
+
+void NokiaLcd::SendFunction(char cmd) //TODO:Detection of what H should be
+{
+    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
+}
+
+NokiaLcd::~NokiaLcd()
+{
+    ShutdownLcd();
+}