File content as of revision 5:67ab1202d0f7:

#include "mbed.h"
#include "I2CEeprom.h"
#include <iostream>

namespace
{

I2C i2c1(I2C_SDA, I2C_SCL );

I2CEeprom eeprom(
    i2c1,
    0b10100000, // i2c bus address
    64,         // page size
    16 * 1024,  // memory size in bytes
    5           // write cycle time in ms
);
}

template <typename T>
bool storage_byte_read_write_test(size_t ee_address,T const & val)
{
    auto numWritten = eeprom.write(ee_address,val);
    if(numWritten != sizeof(val) ) {
        std::cout << "failed to write eeprom\n";
        return false;
    }

    T result;
    auto numRead = eeprom.read(ee_address,result);
    if ( numRead != sizeof(val)) {
        std::cout << "failed to read eeprom\n";
        return false;
    }
    std::cout << "result = " << result << '\n';
    return true;
}

bool storage_byte_read_write_test(size_t ee_address, const char* str, size_t len)
{
    auto numWritten = eeprom.write(ee_address,str,len);
    if(numWritten != len ) {
        std::cout << "failed to write eeprom\n";
        return false;
    }

    char* result = new char[len +1];

    if (! result) {
        std::cout << "malloc failed\n";
        return false;
    }
    memset(result,'X',len);
    result [len] = '\0';

    auto numRead = eeprom.read(ee_address,result,len);
    if ( numRead != len) {
        std::cout << "failed to read eeprom\n";
        delete [] result;
        return false;
    }
    result [len] = '\0';
    bool match = strncmp(str,result,len) ==0;
    if ( match) {
        std::cout << "strings match\n";
    } else {
        std::cout << "strings don't match\n";
    }
    std::cout << "result = " << result << '\n';
    delete [] result;

    return true;
}

int main()
{
    ThisThread::sleep_for(100U);
    char val = 'J';
    if ( storage_byte_read_write_test(0x50,val) ) {
        std::cout << "char -> Success!\n";
    }

    constexpr char str [] =
#if 1
        "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod "
        "tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim "
        "veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea "
        "commodo consequat.";
#else

        "But I must explain to you how all this mistaken idea of denouncing "
        "pleasure and praising pain was born and I will give you a complete "
        "account of the system, and expound the actual teachings of the "
        "great explorer of the truth, the master-builder of human happiness.";
#endif

    std::cout << "length of string = " << strlen(str) <<'\n';

    if ( storage_byte_read_write_test(0x3800,str,strlen(str)+1) ) {
        std::cout << "c_string -> Success!\n";
    }

    for(;;) {;}

}