JTAG UART slowness

--- Quote Start ---

I am trying to write a file from the PC into SDRAM through the JTAG UART, and have found that it is quite slow. I only see about 1KB/s, and need to transfer files that are about 10-20MB.

At first I was using system console to write directly into SDRAM using the "master_write_32" commands. I thought maybe system-console is slow because it needs to control the nios processor in some way.

--- Quote End ---

The fastest method is master_write_memory using the JTAG-to-Avalon-MM bridge.

http://www.ovro.caltech.edu/~dwh/correlator/pdf/altera_jtag_to_avalon_analysis.pdf

Cheers,

Dave