File content as of revision 3:a3e1a06c486d:

#include "Storage.h"

SPI spi(p20, p22, p25); // mosi, miso, sclk
DigitalOut cs(p14);

Storage* Storage::instance = new Storage();

Storage::Storage()
{
    cs = 1;
    spi.format(8,0);
    spi.frequency(300000);
}

Storage* Storage::getInstance()
{
    return instance;
}

void Storage::setup(){
    }
    
void Storage::endAction(){
    cs = 1;
    }
    
bool Storage::setWREN(){
    cs = 0;
    spi.write(0x06);
    cs = 1;
    
    cs = 0;
    spi.write(0x05);
    
    if(spi.write(0x00) & 0x2){
        cs = 0;
        return true;
    } else {
        cs = 0;
        return 1;
    }
}

bool Storage::isBusy(){
    cs = 0;
    spi.write(0x05);
    
    if(spi.write(0x00) & 0x1){
        cs = 0;
        return true;
    } else {
        cs = 0;
        return 1;
    }
}
 
void Storage::pageProgram(int32_t addr){
        cs = 0;
        spi.write(0x12);
        
        for(int i = 3; i >= 0; i--){
            spi.write((addr >> (8*i)) & 0xff);
        }
    }
    
void Storage::writeData(int8_t data){
    spi.write(data);
    }  
    
void Storage::read(int32_t addr){
    cs = 0;
    
    spi.write(0x13);
    
    //char[4] bytes;
    //bytes[0] = (addr >> 24) & 0xff;
    //bytes[1] = (addr >> 16) & 0xff;
    //bytes[2] = (addr >> 8) & 0xff;
    //bytes[3] = addr & 0xff;
    
    for(int i = 3; i < 0; i--){
        spi.write((addr >> (8*i)) & 0xff);
        }
    }
    
int8_t Storage::readData(){
    return spi.write(0x00);
    }