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multiple QSPI Transfer without changing ChipSelect Signals

Question asked by Stefan Gaertner on Apr 6, 2009
Latest reply on Apr 7, 2009 by Stefan Gaertner



I am trying to detect the lenght of a SPI chain. Therefore it necessary to write in the chain at first an amount of Bytes with the value "0", after that known numbers. Then I am waiting till i receive my known number.


I give to the SPI function every time one Byte and send it to the chain. After that I am leaving the function and compare the result with my known number outside the SPI function.


There is only one problem: The Chip-Select Signals changes every time I sent one Byte.


How can I configure the QSPI in that way, that the Chip-Select Signals will memorize their value. (don´t disable the chain)?


regards,  Stefan