AWR1843: Reuse the L1P memory with different function

Wesley He

Expert 6205 points

Part Number: AWR1843

Hello team,

Customer wants to re-use the L1P memory with different function. How can customer do that? Any risk?

Usage is shown below.

Void function_All()

{

DMA copy function_A function to function_A address in L1P;

function_A();

DMA copy function_B function to function_A address in L1P;

function_B();

}

Thanks.

Regards,

Wesley

over 4 years ago

0 Cesar over 4 years ago

TI__Guru*** 148804 points

Yes, customer could do that.

Make sure that the section of L1P where the code is copied is not configured as cache

Please see "COPY_TABLE _MmwDemo_fastCode_L1PSRAM_copy_table" in

mmwave_automotive_toolbox_3_3_0\labs\lab0002_short_range_radar\src\dss\dss_main.c

see also

mmwave_automotive_toolbox_3_3_0\labs\lab0002_short_range_radar\src\dss\c674x_linker.cmd

thank you

Cesar

0 Wesley He over 4 years ago in reply to Cesar

TI__Expert 6205 points

Hi Cesar,

Thanks for your reply.

Do we have any example to do that? If yes, can you please share it to me?

Thanks.

Wesley

0 Cesar over 4 years ago in reply to Wesley He

TI__Guru*** 148804 points

Hi,

The only related example we have is the lab I mentioned.

Alternatively, the customer could configure the L1P as cache and place the code in L2 memory. In this way he does not have to copy the function to L1P, it will be fetched automatically by the cache when it is executed.

thank you

Cesar

0 Wesley He over 4 years ago in reply to Cesar

TI__Expert 6205 points

Hi Cesar,

In this lab, it's using one fast code copy table from L3 to L1P, did you mean we can have another fast code copy table and do the copy from L3 to L1P again?

Thanks.

Wesley

+1 Cesar over 4 years ago in reply to Wesley He

TI__Guru*** 148804 points

Yes,

However this would be similar to using the L1P memory as cache.

thank you

Cesar

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AWR1843: Reuse the L1P memory with different function