Commits on Sep 13, 2020

1. nrf52: SPI transfer failure and corruption …

   The current EasyDMA implementation will fail if a transfer of over
   255 bytes is requested with no warning.
   
   Also we do not set the RX and TX transfer lengths to 0 if the
   buffer is NULL which can cause data to be written to the old
   address as well as cause unexpected transaction lenghts.
   Example:
     transfer 1:
      rx_len  = 10
      rx_buff != NULL
      tx_len  = 10
      tx_buff != NULL
     transfer 2:
      rx_len = 2
      rx_buff != NULL
      tx_buff == NULL
     Total transaction length for the second would be 10 because it
     would still be using the old rx length of 10 and would
     corrupt data in the old rx buffer.
   
   Signed-off-by: Brennan Ashton <bashton@brennanashton.com>

   

   btashton committed Sep 13, 2020
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