sam4s xlpd: spi issue

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when I tried the SPI_example provided in ASF,  the transmission failes:

when initiating the communication, wrong data is sent and wrong data is sent back.

however if I reset only the slave, the transmission goes well in both direction.

any help will be appreciated.

 

NB: I tested SPI communication with an other spi compatible periph but the problem persisted

_user

Last Edited: Tue. Apr 18, 2017 - 03:23 PM