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When sending only few bits of data via FTDI USB-Serial cable to the PC, you have to wait for one of the following conditions to occur before you get your data according to FTDI's AN232B-04, Data Latency Flow:

  1. The buffer is full
  2. One of the RS232 status lines has changed
  3. An event character had been enabled and was detected in the incoming data stream
  4. A timer integral to the chip has timed out.

I want to use option 3, enable an event character and also define it. How do I do that in Windows 7? I can't find any documentation on it. I don't want to have to write code to do it, I just want to know where in my operation system (Windows 7) I could change these settings.

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migrated from electronics.stackexchange.com Apr 12 '12 at 13:27

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1 Answer

It is specified in the Device Control Block on Win32. See the EvtChar member.

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I don't see it as a coding question, as i ideally don't want to write code to set the EvtChar. I just want to change the setting somewhere in my OS (Windows 7). If possible. –  evsc Mar 21 '12 at 17:19
@evsc: Applications can choose to leave the setting unchanged, but most do not. There is no global setting, because this value can potentially break applications. –  Ben Voigt Mar 21 '12 at 17:40
ok. make sense. thanks for the info! –  evsc Mar 21 '12 at 18:08
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