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Bluenrg-MS returns 0x00 in SPI header after sending command

Question asked by Dhaval Malav on Jan 31, 2018
Latest reply on Feb 6, 2018 by Winfred Lu

I have STM32L4 connected to Bluenrg-MS. I am sending data over to the Bluenrg-MS which sends data to peer device. However, after some successful transfers (not consistent: sometimes after 50 notifies and sometimes after 3000 notifies) Bluenrg-MS starts returning 0x00 as its header after STM32L4 sends any command. 

in STM32L4 we are also implementing CS line de-assertion and assertion after each transaction and hence we believe that should wake up the Bluenrg-MS.


Not sure what is going wrong. Any help or direction will be much appreciated.