Diff: I2cLCD.cpp

Revision:

0:8a9ac3d4afdf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2cLCD.cpp	Tue May 29 09:25:22 2012 +0000
@@ -0,0 +1,176 @@
+#include "I2cLCD.h"
+#include "mbed.h"
+
+#define    I2CLCD_ADDR    0x7C
+
+#define RS_CMD        0x00
+#define RS_DATA       0x40
+
+#define FUNC_SET1    0x38
+#define FUNC_SET2    0x39
+#define INT_OSC      0x14
+
+#define CNTR_DEF    0x20
+
+unsigned char icon_data[]=
+{
+    0x00, 0x10,
+    0x02, 0x10,
+    0x04, 0x10,
+    0x06, 0x10,
+    
+    0x07, 0x10,
+    0x07, 0x08,
+    0x09, 0x10,
+    0x0B, 0x10,
+    
+    0x0D, 0x08,
+    0x0D, 0x04,
+    0x0D, 0x02,
+    0x0D, 0x10,
+
+    0x0F, 0x10,
+};
+
+I2cLCD::I2cLCD(PinName sda, PinName scl, PinName rp) :  _rs( rp ) , _i2c( sda , scl ){
+    
+    contrast = CNTR_DEF;
+    icon = 0;
+    
+    wait(0.015);
+    // reset LOW->HIGH
+    _rs = 0;
+    wait(0.01);
+    _rs = 1;
+    wait(0.05);
+    
+    writeCommand(FUNC_SET1);
+    writeCommand(FUNC_SET2);
+    writeCommand(INT_OSC);
+    
+    writeCommand(0x70 | (contrast & 0xF));
+    writeCommand(0x5C | ((contrast >> 4) & 0x3));
+    
+    writeCommand(0x6C);
+    wait(0.3);
+    
+    writeCommand(0x38); // function set
+    writeCommand(0x0C); // Display On
+    
+    cls(); // Clear Display
+    
+}
+
+
+
+void I2cLCD::character(int column, int row, int c) {
+    int a = address(column, row);
+    writeCommand(a);
+    writeData(c);
+}
+
+void I2cLCD::cls() {
+    writeCommand(0x01); // cls, and set cursor to 0
+    wait(0.00164f);     // This command takes 1.64 ms
+    locate(0, 0);
+}
+
+void I2cLCD::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int I2cLCD::_putc(int value) {
+    if (value == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= rows()) {
+            _row = 0;
+        }
+    } else {
+        character(_column, _row, value);
+        _column++;
+        if (_column >= columns()) {
+            _column = 0;
+            _row++;
+            if (_row >= rows()) {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+
+int I2cLCD::_getc() {
+    return -1;
+}
+
+void I2cLCD::writeCommand( int cmd )
+{
+    char cmds[2];
+    
+    cmds[0] = RS_CMD;
+    cmds[1] = cmd;
+    
+    _i2c.write(I2CLCD_ADDR, cmds, 2);
+}
+
+void I2cLCD::writeData( int data )
+{
+    char cmd[2];
+    
+    cmd[0] = RS_DATA;
+    cmd[1] = data;
+    
+    _i2c.write(I2CLCD_ADDR, cmd, 2);
+}
+
+int I2cLCD::address(int column, int row) {
+
+    return 0x80 + (row * 0x40) + column;
+}
+
+int I2cLCD::columns() {
+    return 16;
+}
+
+int I2cLCD::rows() {
+    return 2;
+}
+
+void I2cLCD::seticon(IconType type)
+{
+    icon |= type;
+    puticon( icon );
+}
+
+void I2cLCD::clearicon(IconType type)
+{
+    icon &= ~type;
+    puticon( icon );
+}
+
+
+void I2cLCD::puticon(int flg)
+{
+    static unsigned char icon_buff[16];
+    unsigned char i;
+    
+    for(i=0;i<sizeof(icon_data)/2;i++)
+    {
+        if(flg & (0x1000>>i))
+        {
+            icon_buff[icon_data[i*2]] |= icon_data[i*2+1];
+        }
+        else
+        {
+            icon_buff[icon_data[i*2]] &= ~icon_data[i*2+1];
+        }
+    }
+
+    for(i=0;i<16;i++){
+        writeCommand(0x39);
+        writeCommand(0x40+i);
+        writeData(icon_buff[i]);
+    }
+}