PIL-Box throughput

[J-F Garnier]

(07-13-2015 11:01 PM)Christoph Giesselink Wrote:  A=TIME @ COPY file TO :3 @ TIME-A

Note that the <<:3>> address is not a typo; COPYing to a non-existing device makes the results more representative of the PIL-Box firmware and ILPer frame processing performance, independently of disc/file access, catalog search time, etc...
This is the correct way to estimate the PIL-Box/ILPer (or PIL-Box/Arduino) throughput.

(07-13-2015 11:47 PM)Dave Frederickson Wrote:  What rates do you measure?

The best I got is about 1kB/s. The main limitation is the USB latency (that's why the Arduino-SDdisc throughput is higher).
I'm still exploring new ways to improve the transfer rate, but I don't expect huge improvements.
1kB/s is acceptable for the HP-71B, but is still a bit slow for the HP Portable Plus.

J-F

Additional note: to evaluate the PIL-Box firmware performance only, stop ILPer. Frames will no more be transmitted over serial/USB and the throughput is then much higher :-)