CNTL_SERIAL_NUM_WORDS
u16 serial_num[CNTL_SERIAL_NUM_WORDS];
for (i = 0; i < CNTL_SERIAL_NUM_WORDS; i++)
int i, id_len = CNTL_SERIAL_NUM_WORDS * CNTL_SERIAL_NUM_WORD_SZ + 1;
for (i = CNTL_SERIAL_NUM_WORDS - 1; i >= 0;