File content as of revision 0:61b32e34bcbf:

#include "mbed.h"
#include "GT20L16J1Y_font.h"

GT20L16J1Y_FONT::GT20L16J1Y_FONT() : _spi(p11, p12, p13), _CS(p10) {
}

void GT20L16J1Y_FONT::read(unsigned short code) {
    unsigned char  c1, c2, MSB,LSB;
    uint32_t address, seq;
    
    // SJIS to kuten code conversion
    c1 = (code>>8);
    c2 = (code & 0xFF);
    seq = (c1<=159 ? c1-129 : c1-193)*188 + (c2<=126 ? c2-64 : c2-65);
    MSB = seq / 94 + 1;
    LSB = seq % 94 + 1;
    address = 0;
    
    if(     MSB >=  1 && MSB <= 15 && LSB >= 1 && LSB <= 94)
        address =( (MSB -  1) * 94 + (LSB - 1))*32;
    else if(MSB >= 16 && MSB <= 47 && LSB >= 1 && LSB <= 94)
        address =( (MSB - 16) * 94 + (LSB - 1))*32 + 0x0AA40L;
    else if(MSB >= 48 && MSB <= 84 && LSB >= 1 && LSB <= 94)
        address = ((MSB - 48) * 94 + (LSB - 1))*32 + 0x21CDFL;
    else if(MSB == 85 &&                LSB >= 1 && LSB <= 94)
        address = ((MSB - 85) * 94 + (LSB - 1))*32 + 0x3C4A0L;
    else if(MSB >= 88 && MSB <= 89 && LSB >= 1 && LSB <= 94)
        address = ((MSB - 88) * 94 + (LSB - 1))*32 + 0x3D060L;
    
    // Deselect the device
    _CS = 1;

    // Setup the spi for 8 bit data, high steady state clock
    _spi.format(8,3);
    _spi.frequency(1000000); 
    
    // Select the device by seting chip select low
    _CS = 0;
    _spi.write(0x03);    // Read data byte
    _spi.write(address>>16 & 0xff);
    _spi.write(address>>8 & 0xff);
    _spi.write(address & 0xff);
    
    // Send a dummy byte to receive the contents of the WHOAMI register
    for(int i=0; i<32; i++)
    {
      bitmap[i] = _spi.write(0x00);
    }

    // Deselect the device
    _CS = 1;
}