fx3 slavefifo flag problem

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Anonymous
Not applicable

 hi,everyone,

   

  I am using FX3 cy3014 to develop a data transmission device. The firmware used is  AN65974 salvefifo mode.

   

  But I found that when I sent 1024B data using Control Center, the FLAGC(Empty flag dedicated to thread3) was high. Until I had sent 16KB data (DMA buffersize is 16KB) it became low. When I sent 1023B or any other ,the FLAGC became low immediately. Why I can not send 1024KB data ?

   

  

   

  Another problem , when I sent 256B data by FPGA to fx3 using short packet, The Control Center couldn't read data till timeout. But I sent 255B data ,the Control Center could read back immediately, Why ?

   

 

   

  Thanks very much.

   

  

   

  regards,

   

  hujianhua.

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1 Reply
Anonymous
Not applicable

there is some typing error in my above topic, I don't know how to edit my last topic, so I recorrect it here.

   

"Why I can not send 1024B data ?" not "Why I can not send 1024KB data ?"

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