1 Reply Latest reply on Dec 15, 2014 6:46 AM by davide.bozzato

    CyU3PSibReadWriteRequest function limits

    davide.bozzato

      Hi all,

         

      I've some trouble in using CyU3PSibReadWriteRequest function in a fw derived from cyfx3s_msc example.

         

      In my fw I got rid of all MSC function and I tried to perform raw read/write operations on the eMMC card. It works but it seems that CyU3PSibReadWriteRequest function can read or wite only a limited quantity of data in a "single shoot". I experimentally found that if I try to read more than ~50KB or write more than ~25KB, the SIB callback doesn't returns and no data is transfered.

         

      Has CyU3PSibReadWriteRequestfunction some limits? Should I manage a big transfer using small chunks?

         

      Thanks a lot.

         

      Dax