![]() In this article, I will define this number to be 5, to better illustrate the issue. In fact, this number needs to equal your packet (or frame) size. pointer number is defined as 255 (0xFF) in the original paper. Thus, “0” can be used to mark the end of the stream, in a protocol.īecause it is designed for byte-oriented communication protocol, the max. ![]() The basic idea of COBS is to keep a running pointer (relative to the previous “0” position) of “0” occurrences, which replaces the original “0”s in a byte stream. ![]() Yes, embedded systems are still using serial port today (year 2019). ![]() It is a very useful technique to learn for embedded system, since anecdotally 10% of any hardware engineer’s time is spent (wasted) struggling with serial port communication, for each project. There are plenty of reference material: Wikipedia page and the original paper, even with C source code to get you familiar with the method. HDLC introduced a common byte stuffing method (with 0x7D, 0x7E), until the advent of clever COBS. ![]()
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