Re: [gpsd-dev] Modifying (severly) hardware.html

[Hal Murray]

> 1. Does the serial-to-USB chip pass PPS events handed to the serial side out
> the USB side as interrrupt packets?  The PL2303 does. FTDI chips do not.

Are you sure about the FTDI chip not working?  Is that all of the FTDI chips 
or just some/most of them?

I have one that seems to be working.

Apr 14 21:36:36 cent kernel: usb 3-3: Product: FT232R USB UART
Apr 14 21:36:36 cent kernel: usb 3-3: Manufacturer: FTDI

Apr 14 21:37:14 cent kernel: pps pps1: new PPS source usbserial1
Apr 14 21:37:14 cent kernel: pps pps1: source "/dev/ttyUSB1" added

Linux kernel 3.10.0-229.1.2.el7.x86_64  (CentOS)

(I also have memories of previous success with no details.  I just remembered 
that I had at least one gizmo in my collection that worked in case I wanted 
PPS over USB.)

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Is there a simple test case for TIOCMIWAIT?  Can I tell gpsd/gpsmon to not 
use RFC2783?


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