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Messages - Floppy

4
USB Infrared Toy / Re: Fixed overflow bug in Sample mode in Firmware 2.4
The bug in my setup was that very often in sampling mode (using usb_irtoy driver in lirc) the device returned a 0xffff message which is a long space. It appeared that this was in many cases caused by the device sending three times 0xfff (see manual) which indicates an overflow: the device is producing more data than it can feedback to the host.
LIrc trips over this because it thinks the 0xffff are long spaces .
After examining the mechanism between interrupt handler and main loop, I fond out there is a critical timing problem in the software. By fixing this, there is more time to transport the data to the host.
I am using a Raspberry pi model 2 which is pretty fast but I still had this overflow problem. The problem might not be occurring on other setups.
I also fixed the usb_irtoy driver to cope with this overflow more gracefully.

See sources attached: [attachment=0]
9
USB Infrared Toy / Fixed overflow bug in Sample mode in Firmware 2.4
In my setup it was running into overflow mode every other minute or two.
I took the version 2.2 firmware sources as a base and fixed the sampling mode by changing the interrupt routine.
It now runs flawlessly in sampling mode - didn't change anything else but also didn't test the other modes.
Using usbirtoy hardware verion 2, running on a RaspberyyPi model 2 B with Lirc 0.9.0 with the patches applied of Peter Kooiman to support Usb_Irtoy.
I called the firmware version V2.4 as somebody else already posted V2.3. I did use V2.2 as a base.
Obviously, this is a beta release at your own risk! It works for me though.


[attachment=0]

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