So my first question is what is the difference between functions as they seem to have same behaviour.
Another question is why I got 0x92 before 0x00 because logic analyzer give contrary ?!?
SPI hardware is always full duplex but if you use sequential it will write the bytes you give it and then follow it with zeros sent to read the bytes you requested.
Furthermore, I don’t know why, but yesterday, what I see isn’t correct. I retry this morning and time chart (can you confirm is this the good word ?) are now correct.
The reason that values order isn’t correct was I use foreach to display them, now I use a for loop and all is OK.
@Bauland SPI is better used in FD mode whenever possible. In the last years many chip makers are using the same shift-register decoding logic on-chip for both SPI and I2C, normally for chips that can work on both buses (save money …). This is why some peripheral chips needs a sequential transfer. This is like the repeated start on i2c and if you see your diagram, MOSI is going to be streched high for a while (it seems too much in this case… ).