File content as of revision 6:7ba288afed38:

/*
 * 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 :)
}