SJA1105_SIZE_DEVICE_ID
u8 prod_id[SJA1105_SIZE_DEVICE_ID] = {0};
SJA1105_SIZE_DEVICE_ID);
sja1105_unpack(prod_id, &part_no, 19, 4, SJA1105_SIZE_DEVICE_ID);
p += SJA1105_SIZE_DEVICE_ID;
sum = SJA1105_SIZE_DEVICE_ID;