CCS/TMS320F28379D: Transfer data between two cores through MSGRAM from cpu1 to cpu2 using memcpy()

gurusha nahar

Part Number: TMS320F28379D

Tool/software: Code Composer Studio

I have been trying to transfer data from cpu1 to cpu2 using memcpy(). The data type is the structure (32-bit unsigned int and 1-byte float) which is sending 80 bytes in one shot using memcpy(). IPC flag registers are used for data protection. Is there any better way to achieve this without using memcpy()

over 5 years ago

0 Veena Kamath over 5 years ago

TI__Mastermind 32655 points

Hi,

I believe memcpy copies data byte-by-byte. To make this faster, you can implement a simple loop that copies 32bit/64 bit data at a time. This can reduce the time needed for copying.

If you have large data, you can use DMA to transfer data.

Regards,

Veena

0 Veena Kamath over 5 years ago in reply to Veena Kamath

TI__Mastermind 32655 points

Hi,

Correction to the above post: Since in C28x core byte (8 bit) accesses are not allowed, the memcpy function copies 16 bit data at a time.

Regards,

Veena

0 gurusha nahar over 5 years ago in reply to Veena Kamath

Expert 1260 points

Thanks, Veena

But I think we can copy a number of bytes. There is no guarantee of implementation byte by byte. For now, I might be using DMA transfer as per the application. But what surprised me with some little experimentation that strncpy() also holds a good option.

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CCS/TMS320F28379D: Transfer data between two cores through MSGRAM from cpu1 to cpu2 using memcpy()