Thx for your hint.
Basically it's a good idea, except that the last byte is not recognized (see attachment).
But, in fact, I need to see SPI data at a certain time triggered on analog channel A, of couse
SPI Data input should not be too difficult to decode, so I hope to arouse some ambition in your team. And, btw, it would ebe nice if the code is more robust towards noise spikes in the digital domain.