Diff: I2cLCD16_ACM1601NI/I2cLCD.cpp

Revision:

0:9bf010140a3f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2cLCD16_ACM1601NI/I2cLCD.cpp	Sun Oct 20 03:44:57 2013 +0000
@@ -0,0 +1,120 @@
+//8x2 lcd
+#include "I2cLCD.h"
+#include "mbed.h"
+
+#define    I2CLCD_ADDR    0xa0//0x7C
+
+#define RS_CMD        0x00
+#define RS_DATA       0x80
+const short WAIT1 = 10;
+
+I2cLCD::I2cLCD(PinName sda, PinName scl) :  _i2c( sda , scl ){
+    //_i2c.frequency(50000);
+    wait_ms(15);
+    writeCommand(0x01);
+    wait_ms(5);
+    writeCommand(0x38);
+    wait_ms(5);
+    writeCommand(0x0f);
+    wait_ms(5);
+    writeCommand(0x06);
+    wait_ms(5);
+    writeCommand(0x0c);
+    wait_ms(5);       
+}
+
+
+
+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_ms(2);
+    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);
+	_i2c.start();
+	wait_us(9);
+    _i2c.write(I2CLCD_ADDR);
+	wait_us(WAIT1);
+	_i2c.write(cmds[0]);
+	wait_us(WAIT1);	
+	_i2c.write(cmds[1]);
+	wait_us(WAIT1);	
+	_i2c.stop();
+}
+
+void I2cLCD::writeData( int data )
+{
+    char cmd[2];
+    
+    cmd[0] = RS_DATA;
+    cmd[1] = data;
+    
+    //_i2c.write(I2CLCD_ADDR, cmd, 2);
+	_i2c.start();
+	wait_us(9);
+    _i2c.write(I2CLCD_ADDR);
+	wait_us(WAIT1);	
+	_i2c.write(cmd[0]);
+	wait_us(WAIT1);	
+	_i2c.write(cmd[1]);
+	wait_us(WAIT1);	
+	_i2c.stop();
+
+}
+
+int I2cLCD::address(int column, int row) {
+
+    return 0x80 + (row * 0x40) + column;
+}
+
+int I2cLCD::columns() {
+    return 16;
+}
+
+int I2cLCD::rows() {
+    return 2;
+}