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I'm using USB for communication. Our device sends 100k/s data (ARM7, very small memory size), and the PC needs to receive and process it all.

My previous design was implemented as a mass storage device, and extended a command for the communication protocol. The PC software runs a thread with a loop to receive the data.

The issue is: sometime it loses data.

So we used another solution: usb sim com (RS232).

But I don't know whether or not the OS can contain that much data before I get it using MFC (or pyserial). How can I get/set the buffer size?

wovano
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linjunhalida
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1 Answers1

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We regularly punch about 100KByte/sec through our USB CDC implementation, the PC is fast enough to receive all data. But it seems that the built-in limits are lower with usb-serial (CDC) than with mass-storage protocol (in our case ~600KB/s versus ~100KB/s CDC).

The PC receive thread should have a buffer that's "big enough".

Edit: I don't know Windows' Buffer sizes, or how to get them, though.

Turbo J
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