EEPROM schreiben/lesen/prüfen --> wie geht's schneller?

case OP_READ:

  {

    unsigned int i, count, rlen;

    unsigned char data[16];

    printf("Reading EEPROM,    start address 0x%04x... ", startaddr);

    if (outfile)

      printf("%8d Bytes", 0);

    else

      printf("\n");

    count = 0;

    while (count < length) {

      rlen = MIN(16, length - count);

      i2c_eep_rd(startaddr + count, data, rlen, addrsize);

      if (outfile) {

        printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b%8d Bytes", count + rlen);

        for (i = 0; i < rlen; i++)

          fputc(data[i], outfile);

      } else {

        printf("0x%04X: ", startaddr + count);

        for (i = 0; i < rlen; i++)

          printf("%02x ", data[i]);

        printf("\n");

      }

      count += rlen;

    }

    break;

  }

// ------------------------------------------------------------

// i2c_eep_rd

// ------------------------------------------------------------

void i2c_eep_rd(unsigned int addr, unsigned char *data, unsigned int length, unsigned int addrsize)

{

  unsigned char buf[4];

  unsigned int i;

  unsigned int dev;

  unsigned int rlen;

  while (length) {

    // Determine I2C device address

    dev = 0x50 + ((addr >> (8*addrsize)) & 0x7);

    // Write address to EEPROM

    for (i = 0; i < addrsize; i++)

      buf[i] = (addr >> (8*(addrsize-i-1))) & 0xFF;

    globs.i2c_wr(dev, buf, addrsize);

    // Determine read length (stay within current device)

    rlen = MIN(length, (1 << (8*addrsize)) - addr % (1 << (8*addrsize))); 

    // Read

    globs.i2c_rd(dev, data, rlen);

    // Update variables

    data += rlen;

    length -= rlen;

    addr += rlen;

  }

}

globs.i2c_rd = aa_i2c_rd;

// ------------------------------------------------------------

// aa_i2c_rd

// ------------------------------------------------------------

void aa_i2c_rd(unsigned int devaddr, unsigned char *data, unsigned int length)

{

  // Read with acknowledge polling

  while (!aa_i2c_read(globs.aahandle, devaddr, AA_I2C_NO_FLAGS, length, data));

}