Hi, I have a microcontroller that output’s serial data via USART, with subtractive 16 bit Check Sum. How can I calculate that? I’ve searched on this forum and on the net, but could not find any information on the ‘Subtractive Check Sum’ method. What would the formula be to calculate and verify the check sum?
I have a 2 header bytes (I can choose which and how many header bytes), eleven 16 bits wide (LSB first) data, plus a 16 bit check sum, data stream.