A method for analyzing serial bus protocols with standalone clock signals

Serial bus protocol has become popular and wide-used, and in many cases, it is necessary but hard to find a simple way to analyze its communication process due to its serial features. In this paper, a data acquisition based method is proposed to analyze serial bus communication with standalone clock signals. This method is tested with SPI and I²C bus data and gives the correct results. The method is proven to analyze this kind of serial protocols by translating the serial bus data into dedicated contents according to the protocol format, which extends the utility of instruments.