Diff: hd44780_8bit.cpp

Revision:

0:ae5037e3d6e0

Child:

1:65f72ed914fa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hd44780_8bit.cpp	Mon Nov 15 22:37:30 2010 +0000
@@ -0,0 +1,87 @@
+/*
+ * mbed LCDWindow library
+* Copyright (c) 2010 Hendrik Lipka
+* 
+* 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 "hd44780_8bit.h"
+
+#include "BusOut.h"
+#include "DigitalOut.h"
+#include "wait_api.h"
+
+
+void HD44780LCD8bit::writeText(unsigned int line, unsigned int pos, char text[]) {
+//    printf("print to %d,%d {%s}\n",line,pos,text);
+    int address=line*0x40+pos;
+    sendCmd((unsigned char)address|0x80);
+    wait_us(30);
+
+    int i=0;
+    while (text[i]!=0) {
+        sendData(text[i]);
+        wait_us(30);
+        i++;
+    }
+}
+
+void HD44780LCD8bit::clear() {
+    sendCmd(1);
+}
+
+void HD44780LCD8bit::sendCmd(unsigned char cmd) {
+    _rs->write(0);
+    wait_us(1);
+    sendByte(cmd);
+}
+
+void HD44780LCD8bit::sendData(unsigned char cmd) {
+    _rs->write(1);
+    wait_us(1);
+    sendByte(cmd);
+}
+
+HD44780LCD8bit::HD44780LCD8bit
+(unsigned int width, unsigned int height, BusOut *data, PinName enable, PinName rs)
+        :TextLCDBase(width, height)
+        {
+        _data=data;
+        _rs=new DigitalOut(rs);
+        _enable=new DigitalOut(enable);
+    _enable->write(0);
+    wait_ms(80);
+}
+
+void HD44780LCD8bit::init() {
+    unsigned char initCmd[5]={0x38,0x08,0x01,0x06,0x0c};
+    for (int i=0;i<sizeof(initCmd);i++) {
+        sendCmd(initCmd[i]);
+        wait_ms(50);
+    }
+}
+
+void HD44780LCD8bit::sendByte(unsigned char byte) {
+    _data->write(byte);
+    _enable->write(1);
+    wait_us(2);
+    _enable->write(0);
+    wait_us(30);
+}
+