Diff: ks0108_8bit.cpp

Revision:

0:ae5037e3d6e0

Child:

1:65f72ed914fa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ks0108_8bit.cpp	Mon Nov 15 22:37:30 2010 +0000
@@ -0,0 +1,155 @@
+/*
+ * 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 "ks0108_8bit.h"
+
+#include "BusOut.h"
+#include "DigitalOut.h"
+#include "wait_api.h"
+#include "font.h"
+
+#define ENABLE 1
+
+void KS0108LCD8bit::writeText(unsigned int line, unsigned int pos, char text[]) {
+    printf("print to %d,%d {%s}\n",line,pos,text);
+    int i=0;
+    while (text[i]!=0) {
+        setChar(line, pos+i,text[i]);
+        i++;
+    }
+}
+
+void KS0108LCD8bit::clear() {
+    clearHalf(_left);
+    if (NULL!=_right)
+        clearHalf(_right);
+}
+
+void KS0108LCD8bit::clearHalf(DigitalOut* cs) {
+    for (int x=0;x<8;x++)
+    {
+        for (int y=0;y<64;y++)
+        {
+            sendCmd(0xb8|x,cs); 
+            wait_us(1);    
+            sendCmd(0x40|y,cs); 
+            wait_us(1);    
+            sendData(0,cs);
+            wait_us(1);    
+        }
+    }
+}
+
+void KS0108LCD8bit::setChar(unsigned int line, unsigned int pos, char c) {
+    DigitalOut* cs=NULL;
+    if (pos>7)
+    {
+        cs=_right;
+        pos-=8;
+    }
+    else
+    {
+        cs=_left;
+    }
+    if (NULL==cs)
+        return;
+    
+    sendCmd(0xb8|line,cs); // set x page    
+
+    unsigned int y=pos*8;
+    sendCmd(0x40|y,cs); // set start line
+    
+    // send character data
+    for (int i=0;i<8;i++)
+    {
+        sendData(font_data[c][i],cs);
+    }
+    
+}
+
+KS0108LCD8bit::KS0108LCD8bit
+(unsigned int width, unsigned int height, BusOut *data, PinName enable, PinName rs, PinName leftCS, PinName rightCS)
+        :TextLCDBase(width, height) {
+    _data=data;
+    _rs=new DigitalOut(rs);
+    _enable=new DigitalOut(enable);
+    _left=new DigitalOut(leftCS);
+    _left->write(1-ENABLE);
+    if (NC!=rightCS)
+    {
+        _right=new DigitalOut(rightCS);
+        _right->write(1-ENABLE);
+    }
+    else
+        _right=NULL;
+    _enable->write(0);
+    wait_ms(80);
+}
+
+void KS0108LCD8bit::init() {
+    sendCmd(0x3f, _left);
+    wait_ms(10);
+    sendCmd(0xc0, _left);
+    
+    if (NULL!=_right)
+    {
+        sendCmd(0x3f, _right);
+        wait_ms(10);
+        sendCmd(0xc0, _right);
+    }
+    printf("left vs. right: %d / %d\n",_left,_right);
+    wait_ms(50);
+    clear();
+}
+
+void KS0108LCD8bit::sendCmd(unsigned char cmd, DigitalOut *cs) {
+    _rs->write(0);
+    wait_us(1);
+    sendByte(cmd, cs);
+    wait_us(10);
+}
+
+void KS0108LCD8bit::sendData(unsigned char cmd, DigitalOut *cs) {
+    _rs->write(1);
+    wait_us(1);
+    sendByte(cmd, cs);
+    wait_us(10);
+}
+
+void KS0108LCD8bit::sendByte(unsigned char byte, DigitalOut *cs) {
+    // display reads flags with rising flank of E
+//    printf("send to %d\n",cs);
+    _enable->write(0);
+    cs->write(ENABLE);
+    _data->write(byte);
+
+    wait_us(2);
+    _enable->write(1);
+
+    // display reads data with falling flank of E
+    wait_us(2);
+    _enable->write(0);
+
+    wait_us(30);
+    cs->write(1-ENABLE);
+}