Diff: pcf2119.cpp

Revision:

0:7a19be4cc166

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pcf2119.cpp	Tue Sep 20 23:04:16 2016 +0000
@@ -0,0 +1,173 @@
+/* mbed CD Library, for a i2c LCD based on PCF2119
+ * Copyright (c) 2016, aracosta, http://mbed.org
+ * Copyright (c) 2007-2010, sford, http://mbed.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "pcf2119.h"
+#include "mbed.h"
+
+extern Serial pc;
+
+TextLCD::TextLCD(void) : _i2c(NC, NC), _reset(NC)
+{
+    return;
+}
+
+TextLCD::TextLCD(PinName pSDA, PinName pSCL, PinName pReset, LCDType type) : _i2c(pSDA, pSCL), _reset(pReset), _type(type) {  
+    if (_type != LCDuser)
+        setLCDparam(_type); // otherwise rows, colums, comdelay, adresses must be set before
+
+
+    _reset = 1;
+    wait(0.05f);
+    _reset = 0;
+    wait(0.05f);
+    _reset = 1;
+    wait(0.05f);
+    _reset = 0;
+    
+    wait(0.2f);       // Wait 200ms to ensure powered up
+  
+    writeCommand(0x24); // Function set 4 Bit, 2Line, 5*7
+    cls();              // clear display, reset _column and _row
+    writeCommand(0x0c); // Display on
+    writeCommand(0x06); // cursor right, Display is not shifted
+}
+
+void TextLCD::character(int column, int row, int c) {
+    int a = 0x80 | (LCDparam.addresses[row & 3] + column);
+    writeCommand(a);    // set cursor address
+    writeData(c + 0x80);       // write char
+}
+
+void TextLCD::cls() {
+    writeCommand(0x08); // Display on
+    int a = 0x80 | (LCDparam.addresses[0 & 3] + 0);
+    writeCommand(a);    // set cursor address
+    writeCommand(0x80); // set cursor address
+    for( int i=0;i<LCDparam.columns;i++) {
+        writeData(' ' + 0x80);       // write char
+    }
+    a = 0x80 | (LCDparam.addresses[1 & 3] + 0);
+    writeCommand(a);    // set cursor address
+    for( int i=0;i<LCDparam.columns;i++) {
+        writeData(' ' + 0x80);       // write char
+    }
+    locate(0, 0);       // set internal position
+    writeCommand(0x0c); // Display on
+    wait_us(45 * LCDparam.delay);   // CLS need much time
+}
+
+void TextLCD::locate(int column, int row) {
+    _column = column;   // set position for next char
+    _row = row;         // note: cursor is not set yet
+}
+
+int TextLCD::_putc(int value) {
+    if (value == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= LCDparam.rows) {
+            _row = 0;
+        }
+    } else {
+        character(_column, _row, value);
+        _column++;
+        if (_column >= LCDparam.columns) {
+            _column = 0;
+            _row++;
+            if (_row >= LCDparam.rows) {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+
+// Dummy function - read not supported
+int TextLCD::_getc() {
+    return -1;
+}
+
+void TextLCD::writeCommand(int command) {
+    _i2cbuffer[0] = 0x00;
+    _i2cbuffer[1] = command;
+    _i2c.write(LCDparam.i2c_address, _i2cbuffer, 2, false);
+    wait_us(LCDparam.delay);
+}
+
+
+void TextLCD::writeData(int data) {
+    _i2cbuffer[0] = 0x40;
+    _i2cbuffer[1] = data;
+    _i2c.write(LCDparam.i2c_address, _i2cbuffer, 2, false);
+    wait_us(LCDparam.delay);
+}
+
+
+// set user defined char 
+void  TextLCD::writeCGRAM(int address, int pattern[8]){
+    int i;
+    address = address & 7;  //max 8 char
+    for(i=0;i<8;i++){
+        writeCommand(0x40 | (address * 8) + i);
+        writeData(pattern[i]);
+    }
+}   
+
+void TextLCD::setLCDparam(LCDType _type){
+    switch (_type) {
+        case LCD16x2:
+        case LCD16x2B:
+            LCDparam.columns = 16;
+            break;
+        case LCD20x2:
+        case LCD20x4:
+            LCDparam.columns = 20;
+            break;
+        case LCD24x2:
+            LCDparam.columns = 24;
+            break;
+    }
+    if (_type == LCD20x4) 
+        LCDparam.rows = 4;
+    else 
+        LCDparam.rows = 2;
+        
+    LCDparam.addresses[0] = 0;
+    
+    if (_type == LCD16x2B)
+        LCDparam.addresses[1] = 40;
+    else
+        LCDparam.addresses[1] = 0x40;
+        
+    if (_type == LCD20x4) {
+        LCDparam.addresses[2] = 0x14;
+        LCDparam.addresses[3] = 0x54;}
+    else {
+        LCDparam.addresses[2] = 0;
+        LCDparam.addresses[3] = 0;}
+        
+    LCDparam.delay = 50;            // 50 us delays as default       
+    
+    LCDparam.i2c_address = 0x76;       
+}
+