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c6748 L2 ram can be set as the upp receiving windows address?

hong wang
Intellectual 515 points
Other Parts Discussed in Thread: TMS320C6748

Hi,

Now I don't set the L2 ram of c6748,as default it is used as 256k byte sram,and I set the upp port receive buffer in the L2 ram,when the upp interrupt creats,there receive no data in upp receive buff.While I set the upp receive buffer in share ram,I can get the data from upp.

It is important for me to set the upp receive buffer in L2 ram(used as 256k byte sram),when do this ,the dsp gets a faster speed.

Hong Wang

  • 0
    TI__Guru* 84110 points

    Table 2-4 of the TMS320C6748 datasheet shows the memory map for the device. The column with the heading "Master Peripheral Mem Map" shows the memory ranges and devices that can be addressed by peripherals such as the uPP. To write to the DSP's L2 SRAM, you must write to the range starting at 0x11800000 which is a global mirror address for the same physical L2 SRAM that is available only to the DSP's instructions at 0x00800000.

    Regards,
    RandyP

     

    If you need more help, please reply back. If this answers the question, please click  Verify Answer  , below.

  • 0 in reply to RandyP
    Intellectual 515 points

    RandyP,

    Thanks for the prompt reply.  This is very helpful feedback for us!

    I am so happy,thanks again! :)

    Best regards,

    HongWang