3 Replies Latest reply on Dec 18, 2015 2:59 AM by user_1377889

    Does I2S_WriteByte() block?

    kai1.huang_1512706

      How can I detect I2S_WriteByte() over ?

         

      I need write a lot data to I2S interface at a speical speed. how can i realize it ?

        • 1. Re: Does I2S_WriteByte() block?
          user_1377889

          The datasheet is quite clear about that:

             

          Description: This macro writes a single byte into the Tx FIFO for the specified stereo channel. You have
          to check the Tx status before this call to confirm that the Tx FIFO is not full.

             

          Furthermore read about I2S_ReadTxStatus() and the declaration of the status bits.

             

          You can write to I2S using the interrupt for FIFO not full (level) and feed your interface until the FIFO is filled.

             

           

             

          Bob

          • 2. Re: Does I2S_WriteByte() block?
            kai1.huang_1512706

            Thank you. but there is a I2S_WriteByte() and I2S_ReadByte. how can i write or read a 16 bits data on special channel?

               

            what does interleaved mean?

            • 3. Re: Does I2S_WriteByte() block?
              user_1377889

              From datasheet:

                 

              Data interleaving
              This parameter is used to select whether the data is Interleaved (default) or Separate L/R. Rx
              and Tx are selected independently. When the Interleaved option is selected, the left and right
              channels are interleaved with a sample for the left channel first, followed by the right channel in a
              single FIFO (FIFO 0). In Separate L/R is selected, the left and right channel byte streams use
              separate FIFOs: FIFO 0 and FIFO 1. Each FIFO has 4-byte depths.

                 

              16 bit values are red and written as separate 8 bit units that you combine/separate yourself to/from 16 bit units.

                 

               

                 

              Bob