File content as of revision 0:839ab88da656:

/* mbed Nokia LCD Library
 * Copyright (c) 2007-2010, sford
 */

#include "NokiaLCD.h"
#include "small_font.h"
#include "mbed.h"

#define NOKIALCD_ROWS 16
#define NOKIALCD_COLS 16
#define NOKIALCD_WIDTH 130
#define NOKIALCD_HEIGHT 130
#define NOKIALCD_FREQUENCY 5000000

#define countof(x) ( sizeof(x) / sizeof(x[0]) )

bool kstate = false;
unsigned int kbuf;

NokiaLCD::NokiaLCD(PinName mosi, PinName sclk, PinName cs, PinName rst, LCDType type)
        : _spi(mosi, NC, sclk)
        , _rst(rst)
        , _cs(cs) {

    _type = type;

    _row = 0;
    _column = 0;
    _foreground = 0x00FFFFFF;
    _background = 0x00000000;

    reset();
}

void NokiaLCD::reset() {

    // setup the SPI interface and bring display out of reset
    _cs = 1;
    _rst = 0;
    _spi.format(9);
    _spi.frequency(NOKIALCD_FREQUENCY);
    wait_ms(1);
    _rst = 1;
    wait_ms(1);

    _cs = 0;

    switch (_type) {
        case LCD6100:
            command(0xCA); // display control
            data(0);
            data(32);
            data(0);
            command(0xBB);
            data(1);
            command(0xD1); // oscillator on
            command(0x94); // sleep out
            command(0x20); // power control
            data(0x0F);
            command(0xA7); // invert display
            command(0x81); // Voltage control
            data(39);      // contrast setting: 0..63
            data(3);       // resistance ratio
            wait_ms(1);
            command(0xBC);
            data(0);
            data(1);
            data(4);
            command(0xAF);  // turn on the display
            break;

        case LCD6610:
            command(0xCA);    // display control
            data(0);
            data(31);
            data(0);
            command(0xBB);
            data(1);
            command(0xD1); // oscillator on
            command(0x94); // sleep out
            command(0x20); // power control
            data(0x0F);
            command(0xA7); // invert display
            command(0x81); // Voltage control
            data(39);      // contrast setting: 0..63
            data(3);       // resistance ratio
            wait_ms(1);
            command(0xBC);
            data(0);
            data(0);
            data(2);
            command(0xAF);  // turn on the display
            break;

        case LCD3300:
            command(0xCA); // display control
            data(0);
            data(32);
            data(0);
            command(0xBB);
            data(1);
            command(0xD1); // oscillator on
            command(0x94); // sleep out
            command(0x20); // power control
            data(0x0F);
            command(0xA7); // invert display
            command(0x81); // Voltage control
            data(39);      // contrast setting: 0..63
            data(3);       // resistance ratio
            wait_ms(1);
            command(0xBC);
            data(1);
            data(0);
            data(4);
            command(0xAF);  // turn on the display
            break;

        case PCF8833:
            command(0x11);  // sleep out
            command(0x3A);  // column mode
            data(0x05);
            command(0x36);  // madctl
            data(0x60);     // vertical RAM, flip x
            command(0x25);  // setcon
            data(0x30);// contrast 0x30
            wait_ms(2);
            command(0x29);//DISPON
            command(0x03);//BSTRON
            break;
    }

    _cs = 1;

    cls();
}

void NokiaLCD::command(int value) {
    _spi.write(value & 0xFF);
}

void NokiaLCD::data(int value) {
    _spi.write(value | 0x100);
}

void NokiaLCD::_window(int x, int y, int width, int height) {
    int x1 = x + 2;
    int y1 = y + 0;
    int x2 = x1 + width - 1;
    int y2 = y1 + height - 1;

    switch (_type) {
        case LCD6100:
        case LCD6610:
        case LCD3300:
            command(0x15); // column
            data(x1);
            data(x2);
            command(0x75); // row
            data(y1);
            data(y2);
            command(0x5C); // start write to ram
            break;
        case PCF8833:
            command(0x2A);  // column
            data(x1);
            data(x2);
            command(0x2B); // row
            data(y1);
            data(y2);
            command(0x2C); // start write to ram
            break;
    }
}

void NokiaLCD::_putp(int colour) {
    int gr = ((colour >> 20) & 0x0F)
             | ((colour >> 8 ) & 0xF0);
    int nb = ((colour >> 4 ) & 0x0F);
    data(nb);
    data(gr);
}


void NokiaLCD::locate(int column, int row) {
    _column = column;
    _row = row;
}

void NokiaLCD::newline() {
    _column = 0;
    _row++;
    if (_row >= NOKIALCD_ROWS) {
        _row = 0;
    }
}

unsigned int NokiaLCD::findface(unsigned short c) {
    unsigned int p = 0;
    int i, sum;
    for (sum = i = 0; i < countof(font8table); i++) {
        if (font8table[i].start <= c && c <= font8table[i].end) {
            p = (sum + c - font8table[i].start);
            break;
        }
        sum += font8table[i].end - font8table[i].start + 1;
    }
    return p;
}

int NokiaLCD::_putc(int value) {
    int x = _column * 8;  // FIXME: Char sizes
    int y = _row * 8;

    if(value == '\n') {
        newline();
    } else if (kstate) { // 2nd byte of shift-jis
        kstate = false;
        int p = findface(kbuf << 8 | value);
        bitblit(x + 1, y + 1, 8,8, (char*)&(FontLookup[p][0]));

           //printf("%x %x",( kbuf << 8 | value),p); //for debug
        _column++;
        if (_column >= NOKIALCD_COLS) {
            _row++;
            _column = 0;
        }
        if (_row >= NOKIALCD_ROWS) {
            _row = 0;
        }
    } else if ((0x81 <= value && value <= 0x9f) || (0xe0 <= value && value <= 0xfc)) { // 1st byte of shift-jis
        kstate = true;
        kbuf = value;
    } else {
        bitblit(x + 1, y + 1, 8, 8, (char*)&(FontLookup_ABC[value-32][0]));
        _column++;
        if (_column >= NOKIALCD_COLS) {
            _row++;
            _column = 0;
        }
        if (_row >= NOKIALCD_ROWS) {
            _row = 0;
        }
    }

    return value;
}

void NokiaLCD::cls() {
    fill(0, 0, NOKIALCD_WIDTH, NOKIALCD_HEIGHT, _background);
    _row = 0;
    _column = 0;
}


void NokiaLCD::window(int x, int y, int width, int height) {
    _cs = 0;
    _window(x, y, width, height);
    _cs = 1;
}

void NokiaLCD::putp(int colour) {
    _cs = 0;
    _putp(colour);
    _cs = 1;
}

void NokiaLCD::pixel(int x, int y, int colour) {
    _cs = 0;
    _window(x, y, 1, 1);
    _putp(colour);
    _cs = 1;
}

void NokiaLCD::fill(int x, int y, int width, int height, int colour) {
    _cs = 0;
    _window(x, y, width, height);
    for (int i=0; i<width*height; i++) {
        _putp(colour);
    }
    _window(0, 0, NOKIALCD_WIDTH, NOKIALCD_HEIGHT);
    _cs = 1;
}

void NokiaLCD::blit(int x, int y, int width, int height, const int* colour) {
    _cs = 0;
    _window(x, y, width, height);
    for (int i=0; i<width*height; i++) {
        _putp(colour[i]);
    }
    _window(0, 0, NOKIALCD_WIDTH, NOKIALCD_HEIGHT);
    _cs = 1;
}

void NokiaLCD::bitblit(int x, int y, int width, int height, const char* bitstream) {
    _cs = 0;
    _window(x, y, width, height);
    for (int i=0; i<height*width; i++) {
        int byte = i / 8;
        int bit = i % 8;
        int colour = ((bitstream[byte] << bit) & 0x80) ? _foreground : _background;
        _putp(colour);
    }
    _window(0, 0, _width, _height);
    _cs = 1;
}




void NokiaLCD::foreground(int c) {
    _foreground = c;
}

void NokiaLCD::background(int c) {
    _background = c;
}

int NokiaLCD::width() {
    return NOKIALCD_WIDTH;
}

int NokiaLCD::height() {
    return NOKIALCD_HEIGHT;
}

int NokiaLCD::columns() {
    return NOKIALCD_COLS;
}

int NokiaLCD::rows() {
    return NOKIALCD_ROWS;
}