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DM385IPNC DDR3 256MB interface

tejash patel
Prodigy 120 points
Other Parts Discussed in Thread: DM385

Hi All,

      In DM385 IPNC RDK V3.5.0 make file, 256MB and 512MB compilation option is available.In DM385IPNC 2 x16 ddr3 connected to EMIF0 and default ddr3 frequency is 533Mhz. I have changed ddr3 frequency to 266Mhz. and I have compiled RDK using 256MB option. With this change IPNC RDK  (all application) working fine. I have disabled x16 256MB ddr3 @ D15-D31 using (#define DDR3_EMIF_SDRAM_CONFIG 0x61C15A32) in u-boot. But after disabling ddr3 @ D15-D31 we are getting below error from m3vpss. 

   Why m3vpss is giving this error? How to interface DDR3 to EMIF for 256MB DDR(@266Mhz)?  

   Case 1: x16 256MB  --> EMIF0 D0-D15

   Case 2: x16 128MB  --> EMIF0 D0-D15 & x16 128MB  --> EMIF0 D16-D31

   Case 3. x32 256MB  --> EMIF0 D0-D31

    Which case we can use for 256MB interface?

Error:

[m3vpss ]      ##################### REISZER OVERFLOW OCCURED: RESTARTING...############################
 [m3vpss ]      ##################### REISZER OVERFLOW OCCURED: RESTARTING...############################
 [m3vpss ]  7124: CAMERA: Overflow detected on VP0, Total Resets = 6
 [m3vpss ]  7125: CAMERA: Overflow detected on VP1, Total Resets = 6
mkdosfs 3.0.12 (29 Oct 2011)
unable to get drive geometry, using default 255/63
/dev/sbulla has 255 heads and 63 sectors per track,
logical sector size is 512,
using 0xf8 media descriptor, with 1024 sectors;
file system has 2 12-bit FATs and 4 sectors per cluster.
FAT size is 1 sector, and provides 247 clusters.
There is 1 reserved sector.
Root directory contains 512 slots and uses 32 sectors.
Volume ID is dea59f6c, no volume label.
 [m3vpss ]      ##################### REISZER OVERFLOW OCCURED: RESTARTING...############################
 [m3vpss ]      ##################### REISZER OVERFLOW OCCURED: RESTARTING...############################
 [m3vpss ]      ##################### REISZER OVERFLOW OCCURED: RESTARTING...############################
 [m3vpss ]  7456: CAMERA: Overflow detected on VP0, Total Resets = 7
 [m3vpss ]  7457: CAMERA: Overflow detected on VP1, Total Resets = 7
               

Regards,

Tejash Patel

                                                      

  

  • 0
    TI__Expert 8780 points

    Tejash,

    This means that the FIFO (RSZ) is going into overflow condition often, this will happen if there is not enough bandwidth available to run your use-case.

    In this case either increase DDR clock/width or reduce the processing requirements.

    Regards

    Rajat