Trouble using multiple laser filament monitors under RRF3

kinta

Hi guys, I'm having trouble using multiple laser filament monitors under RRF3.

Under the following conditions I am able to run 6 monitors at the same time in any configuration without trouble.
Firmware Name: RepRapFirmware for Duet 2 Wifi/Ethernet
Firmware Electronics: Duet Wifi 1.02 or later + DueX5
Firmware Version: 2.04RC1 (2019-07-14b1)
WiFi Server Version: 1.23
Web Interface Version: 1.22.5
Laser Filament Monitor: Version 1.7
Inputs: xstop, ystop, zstop, e1stop, (e3stop, e4stop, e5stop - without DueX5), e10stop (enc_b) & e11stop (enc_a)

However, when using RRF3, I start running into trouble.
Firmware Version: 3.0beta10
Inputs: xstop, ystop, zstop, e1stop, (duex.cs5, duex.cs6, duex.cs7, duex.cs8), connlcd.encb & connlcd.enca

I'm able to run with all 6 monitors electrically connected and any 2 enabled & giving readback. However, if I try to enable a third, I get intermittent system restarts (particularly when homing). Sorry I don't have a fully functioning system, so I can't print anything yet. If I try & enable 4 or more, the system gets stuck in a reboot loop and won't start.

If your able to look into this & release a fix in a later version (assuming that I haven’t stuffed up) that would be great.
config RRF3 (2019-09-27).g

Thanks.

dc42

Perhaps memory is running out. If you configure 2 filament monitors and run M122, how much Never Used RAM does it report? What is the figure with 3 monitors configured? It may be helpful to try this using RRF2 as well as RRF3.

kinta

You’ve hit the nail on the head.

My only question now is what can be done (I’d really like to be able to run 6 monitors & the XY&Z Endstops)?
Is it possible to configure the XY&Z Endstops on the DueX5 under RRF2?
I’m assuming freeing up enough memory in RRF3 is not going to be an option.

dc42

The question is, why does RRF3 use about 8.8K more memory than RRF2. I will look into that.

dc42

I've found and fixed one of the reasons for the excessive memory usage of RRF3 on Duet 2, saving 3K. I still need to find the reason for most of the remaining ~5.8K.

kinta

Sounds great & thanks for looking into this. I look forward to trying it out once you've had time to track down the remaining memory.

dc42

I saved another 4K of RAM in the Duet 2 builds. New RRF3 release coming soon, perhaps tomorrow.

kinta

Thanks @dc42 all is looking good with the new update.