EDMA is not transferring data to external RAM.

[rnicolls]

Hi,

We're currently using the IMXRT1176 and running our application out of external SDRAM. We're using the EDMA to transfer data from I2C to a buffer that is located in the internal RAM which works well. However, if we move that buffer to the external SDRAM as well, the data is no longer transferred. 

Is the EDMA able to transfer data to external memory? Is the fact that we're executing instructions from the same memory causing issues?

Thanks,

Rory

[svoulaz_ik · Accepted solution]

Hello Rory,
afaik the EDMA works fine with external SDRAM, provided cache setting is correct. If the buffer is located in a cached region, then it may appear like it is not filled.

BR
Stefano

[rnicolls]

Makes sense! Thanks for the reply.