sequential (33) I2C and SPI protocol
https://wodewangzhishime.blogspot.com/2022/07/httpswodewangzhishime.htm . Ref: https://wodewangzhishime.blogspot.com/2022/03/httpswodewangzhishime_73.html . ... . . . . . . John: Look at the 1st picture. Originally, the master of SPI use the clock line of the system. At the same time, the master of SPI use the line of parallel in-out of the system. However, hacker the system. Finally, it become, . Subject [master of spi] Interrupt [the clock line of RJ45] <---- Originally, it is clock line of system. Parallel input output line [Parallel input output lines from RJ45] <--- Originally, it is the parallel input output line from the system. Object [slave of spi] Value [pending]. . Me: After hacking, the "master of SPI" share the data line and the clock line with RJ45. . John: The master of SPI not only "share" the data line and clock line with RJ45 , but also the master of Spi share the modulator of RJ45 . . Me: OK. . John: Look at the 3rd picture. C...