Revision 6:7ba288afed38, committed 2011-01-04

Comitter:

hlipka

Date:

Tue Jan 04 22:10:41 2011 +0000

Parent:

5:3ff30ca33efc

Child:

7:b472970bd8f6

Commit message:

added initial driver for SED1335 based displays (text mode only, no fancy stuff, 320x240 pixels)

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sed1335text.cpp	Tue Jan 04 22:10:41 2011 +0000
@@ -0,0 +1,197 @@
+/*
+ * 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 "sed1335text.h"
+
+#include "BusOut.h"
+#include "DigitalOut.h"
+#include "wait_api.h"
+
+void SED1335TextLCD::writeText(const unsigned int column, const unsigned int row, const char text[]) {
+    int i=0;
+    
+    int pos=row*getColumns()+column;
+    
+    sendCmd(0x46); // set cursor addr
+    sendData(pos&0xff); 
+    sendData((pos&0xff00)>>8);
+    
+    sendCmd(0x42);
+    while (text[i]!=0) {
+        sendData(text[i]);
+        i++;
+    }
+}
+
+void SED1335TextLCD::clear() {
+    _guard->take();
+    
+    ::printf("start clear\n");
+    // first block    
+    sendCmd(0x46); // set cursor addr
+    sendData(0x00); // start of RAM
+    sendData(0x00);
+    wait_ms(1);
+    
+    sendCmd(0x42); // write to memory
+    for (int i=0;i<40*30;i++)
+        sendData(0x20);    // send space
+    wait_ms(1);
+    
+    // second block
+    sendCmd(0x46); // set cursor addr
+    sendData(0x00); // start of RAM
+    sendData(0x10);
+    wait_ms(1);
+    
+    sendCmd(0x42); // write to memory
+    for (int i=0;i<40*30*8;i++)
+        sendData(0x00);    // send space
+    wait_ms(1);
+
+    // third block
+    sendCmd(0x46); // set cursor addr
+    sendData(0x00); // start of RAM
+    sendData(0x08);
+    wait_ms(1);
+    
+    sendCmd(0x42); // write to memory
+    for (int i=0;i<40*30;i++)
+        sendData(0x00);    // send space
+    wait_ms(1);
+
+    sendCmd(0x46); // set cursor addr
+    sendData(0x00); // start of RAM
+    sendData(0x00);
+    
+    ::printf("end clear\n");
+    _guard->release();
+}
+
+
+void SED1335TextLCD::character(int column, int row, int c){
+    _guard->take();
+    _guard->release();
+}
+
+SED1335TextLCD::SED1335TextLCD
+(const unsigned int columns, const unsigned int rows, BusOut *data, const PinName read, const PinName write, const PinName cs, const PinName a0, const PinName reset)
+        :TextLCDBase(columns, rows) {
+    _data=data;
+    _rd=new DigitalOut(read);
+    _wr=new DigitalOut(write);
+    _a0=new DigitalOut(a0);
+    _cs=new DigitalOut(cs);
+    _reset=new DigitalOut(reset);
+    wait_ms(10);
+}
+
+void SED1335TextLCD::init() {
+    ::printf("reset");
+    _reset->write(0);
+    wait_ms(2);
+    _reset->write(1);
+    wait_ms(10);
+    ::printf(" finished\n");
+    
+    sendCmd(0x40); // SYSTEM SET
+    sendData(0x30); // p1 set cg rom
+    sendData(0x87); // p2 
+    sendData(0x7);  // p3 
+    sendData(0x27); // p4 
+    sendData(0x2f); // p5 
+    sendData(0xef); // p6 
+    sendData(0x28); // p7 
+    sendData(0x0);  // p8 
+    wait_ms(1);
+
+    sendCmd(0x44); // SCROLL
+    sendData(0x00); // first block at 0
+    sendData(0x00);
+    sendData(0xf0); // 240 lines
+    sendData(0x00); // second block at 0x1000
+    sendData(0x10);
+    sendData(0xf0); // 240 lines
+    sendData(0x00); // third block at 0x800
+    sendData(0x08);
+    wait_ms(1);
+    
+    sendCmd(0x5a); // HDOT SCR
+    sendData(0x0);
+        
+
+    sendCmd(0x5b); // OVLAY
+    sendData(0x01); // 2 layers, text, x-or
+    wait_ms(1);
+
+    sendCmd(0x59); // DISP on
+    sendData(0x54); // all layers on, cursor off
+//    sendData(0x56); // all layers on, cursor flashing
+    wait_ms(1);
+    
+    clear();
+    
+    sendCmd(0x5d); // CSR FORM
+    sendData(0x04); // 8 pixels wide
+    sendData(0x86); // 2 pixel high, block cursor
+    wait_ms(1);
+    
+    sendCmd(0x4c); // CSR DIR right
+    wait_ms(1);
+    
+}
+
+void SED1335TextLCD::sendCmd(const unsigned char cmd) {
+    ::printf("c->%x\n",cmd);
+    _rd->write(1);
+    _wr->write(1);
+    _a0->write(1);
+    _cs->write(0);
+    // address setup time is 0
+    sendByte(cmd);
+    wait_us(10);
+}
+
+void SED1335TextLCD::sendData(const unsigned char cmd) {
+//    ::printf("d");
+    _rd->write(1);
+    _wr->write(1);
+    _a0->write(0);
+    _cs->write(0);
+    // address setup time is 0
+    sendByte(cmd);
+    wait_us(10);
+}
+
+void SED1335TextLCD::sendByte(const unsigned char byte) {
+//    ::printf("->%x\n",byte);
+    // display reads with rising flank of /wr
+    // first, set data, then set /wr low (no timing needed)
+    _data->write(byte);
+    _wr->write(0);
+    // wait for setup
+    wait_us(1);
+    // set /wr back to high
+    _wr->write(1);
+    // address / data hold time is 10 / 5 ns, so its handled by executing normal code :)
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sed1335text.h	Tue Jan 04 22:10:41 2011 +0000
@@ -0,0 +1,65 @@
+/*
+ * 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.
+*/
+
+#ifndef SED1335_8BIT_H_
+#define SED1335_8BIT_H_
+
+#include "lcd.h"
+
+#include "BusOut.h"
+#include "DigitalOut.h"
+
+using namespace mbed; 
+
+/**
+ * class for connecting graphical SED1335-based LCD-Display (or using similiar controllers)
+ * displays are connected in 8bit-mode, and are using the internal 8x8 font
+*/
+class SED1335TextLCD: public TextLCDBase
+{
+    public:
+        /**
+         * @param columns number of chars per line (using an 8x8 font)
+         * @param rows number of lines (using an 8x8 font)
+         * @param data the bus object used for sending data (must be 8bit)
+         * @param enable the pin name for the enable line (1=active)
+         * @param rs the pin name for the register select line (0=cmd, 1=data)
+         * @param leftCS the pin name for the left display half (1=active)
+         * @param rightCS the pin name for the right display half (1=active, use NC for smaller displays)
+        */
+        SED1335TextLCD(const unsigned int columns, const unsigned int rows, BusOut *data, const PinName read, const PinName write, const PinName cs, const PinName a0, const PinName reset); 
+        virtual void init();
+        virtual void writeText(const unsigned int column, const unsigned int row, const char text[]);
+        virtual void clear();
+        virtual void character(int column, int row, int c);
+
+    protected:
+        void sendCmd(const unsigned char byte);
+        void sendData(const unsigned char byte);
+        
+        void sendByte(const unsigned char byte);
+        
+        BusOut* _data;
+        DigitalOut *_rd, *_wr, *_cs, *_a0, *_reset;
+};
+#endif
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