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2258432's avatar
2258432
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

How to use AvalonMM-AvalonMM mode of mSGDMA

Hello, I want to use mSGDMA to move data from the FPGA side to HPS DDR3. I referred to writing_to_hps_memory and used the same design to complete the data movement process. My data width is 32 bit...
Board Debug
Fpga Devkit
AdzimZM_Altera's avatar
AdzimZM_Altera
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hello,


It's may related to Maximum Transfer Length.

The length fields will specify the number of bytes to transfer per descriptor.



2258432's avatar
2258432
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Hello,

I specified the descriptor to transfer approximately 24MB of data each time, and tried to set the mSGDMA for writing data and the mSGDMA for reading data separately.

When the data is 16 bits, the write side mSGDMA maximum burst count is set to 32, while the read side mSGDMA is set to 0. Now, it is normal to write data to HPS DDR3 and read it out to the FPGA side.

Thanks again for your help. Please close this thread.

Best regard.