Part Number: TMS320C6657
Hello Forum,
i have some difficulties in getting correct data in my application.
In my app Core 1 only handels uPP Datatransfers. The Buffers are globally defined in the following way:
#pragma DATA_SECTION(rcvBuffer_0,".far:uPPrcv_0"); #pragma DATA_ALIGN(rcvBuffer_0,CACHE_L2_LINESIZE); int16_t rcvBuffer_0[DATASIZE];
The Sections in the app.cfg are defined :
Program.sectMap[".far:uPPrcv_0"] = "MSMCSRAM";
On Core 0 i have the buffers
extern far int16_t rcvBuffer_0[DATASIZE];
Core 0 also transmits these buffers via Ethernet to a PC (UDP).
to do this i have another buffer for the header, checksums, data and so on.
at least this buffer is copied to the descriptor as in the Benchmarc example given.
Q1: do i have to use the global adresses for upp-DMA also on Core 0 for MSMC-Ram ?
Q2: on Core_1: before the uppDescriptor is written i invalidate L2 and L1D, when the data transfer is finished i do a CacheWbL2 and L1, correct?
Q3: on Core_0: before the data is copied (with memcpy() always) i have to CacheWbL2 and L1, right?
Q4: on Core_0: before the Eth-descriptor is send, i have to CacheWbL2 and L1, right?
In Sum i have 3 Buffers. Core_1 writes to Buf0, in that time Core_0 reads from Buf2, and so on.
Behavior is that the data freezes after some time, but not periodically.
Many thanks for any answers.
Best Regards
Martin
