C6678 SRIO DMA Transfer Error

Gabriele_Giannini

I'm trying to use SRIO in loopback mode.

Reading the completon code i always read the code 101b = DMA Transfer Error

What could be the cause of this kind of error?
I've controlled the source and dest address and they're correct (I'm transfering 2 Bytes of data from internal L2 memory of core 0 to internal L2 memory of core 0
And, of course, i'm using the global address 0x1... for L2 menory instead of local addres 0x0...

over 11 years ago

0 Ganapathi Dhandapani95 over 11 years ago

TI__Mastermind 28085 points

Hi Gabriele,

The DMA Transfer error indicates an access attempt to either a non-mapped address, reserved address, or privledged/protected address. Basically the internal bus returns an error to the SRIO peripheral for trying to access that address.

see the following threat:

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/219242/773014.aspx#773014

Thanks,

0 Gabriele_Giannini over 11 years ago in reply to Ganapathi Dhandapani95

Intellectual 925 points

Ok, ok, i've resolved this.

I have a strange behaviour programming the shadow registers when i write them more than one time (http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/331629.aspx) so my settings of starting and destination addess get corrupted and maybe my dsp was trying to write in unknow locations...

Processors

Processors forum

C6678 SRIO DMA Transfer Error