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Problems as OMAPL137 EMIFA Asynchronous Read Operation‏



HI TI Supporter
 
 I developes a board with OMAPL137.
 
 The board have OMAL137 and FPGA Interface. and I use Asynchronous Controller of EMIFA.
 
 I  tried Wirte Operation and Read Operation from OMAL137 to FPGA.
 
 I found  Read operation in Normal mode incorrect, but Write Operation correct.
 
 i tried Only Write Operation Several times that
 
 Write Operation wrote alterantely "1" and  '0'  on the Register  in FPGA. and then the result was correct.
 
 Also i tried read Operation several times that Read Operation read the register in FPGA
 
  and then it was not correct.  first I misunderstood  Read Operation corret.
 
   But I realized Read Operation incorrect at once. i checked it with Signal Analizer. 
 
    I Only guess my mistake about OMAPL137 Resigster Setting for Asynchronous Controller of EMIFA.
 
  BOOTCFG -> 0x000F371
 
  PINMUX13 -> 0x11111111
  PINMUX14 -> 0x11111111
  PINMUX15 -> 0x11111111
  PINMUX16 -> 0x11111111
  PINMUX17 -> 0x00111111
  PINMUX18 -> 0x11101010
  PINUMX19 -> 0x00000001
 
  CE2CFG  -> 0x886225BD
  
   using  CS[2] line
  
   C code for Read Operation
 
        temp =  *(volatile int *)(0x60000004);
  
  you can see the write timing (attached write Timing file)that write Operation writes '1' or  '0'  the register in FPGA
 
  As Write Operation in Normal Mode(ASIZE = 1, 16bits) have EMA_WE low  2 Times about  EMA_CS2 low 1 Time.
 
   I know that Read Operation in Normal Mode(ASIZE = 1, 16bits) have EMA_OE low 2 Times about EMA_CS2 low 1 Time.
 
   but  read Timing have EMA_CS2 low 2 Times for One Read Operation,  the EMA_CS2  low have EMA_OE low 16 Times.
  
    I Can't understand the reason.
 
    Please let me know my fault Register setting for Asynchronous Controller of EMIFA. 
            
     i really want to receive your response as soon as possilbe