Duet Wifi 3.2beta2 crashes with long menu file

spw

When the menu file is over 30 lines long the board restarts when the menu is selected. Making the menu shorter by a few lines makes it stable for a little bit and crashes after a moment. Short menus < 20 seem to work fine. Maybe memory issue?

My HW:
Duet Wifi v1.03 with 3.2beta2 firmware

My config:

M918 P1 E4 F2000000

crashing menu file:

text R0 C2 F0 T"x:"
alter N510 D1 W26
text C46 T"y:"
alter N511 D1 W26
text C88 T"z:"
alter N512 D2 W32

image R12 C0 L"hline.img"

text R14 C1 F0 T"x"
button C11 T"-50 "  A"G91 G1 X-50 F6000"
button C32 T"-10 "  A"G91 G1 X-10 F6000"
button C50 T" -1 "   A"G91 G1 X-1 F6000"
button C69 T"+1 "   A"G91 G1 X1 F6000"
button C87 T"+10 "  A"G91 G1 X10 F6000"
button C108 T"+50 " A"G91 G1 X50 F6000"

text R26 C1 F0 T"y"
button C11 T"-50 "  A"G91 G1 Y-50 F6000"
button C32 T"-10 "  A"G91 G1 Y-10 F6000"
button C50 T" -1 "  A"G91 G1 Y-1 F6000"
button C69 T"+1 "   A"G91 G1 Y1 F6000"
button C87 T"+10 "  A"G91 G1 Y10 F6000"
button C108 T"+50 " A"G91 G1 Y50 F6000"

text R38 C1 F0 T"z"
button C11 T"-25 " A"G91 G1 Z-25 F6000"
button C32 T"-5 "  A"G91 G1 Z-5 F6000"
button C50 T" -1 " A"G91 G1 Z-1 F6000"
button C69 T"+1 "  A"G91 G1 Z1 F6000"
button C87 T"+5 "  A"G91 G1 Z5 F6000"
button C108 T"+25 " A"G91 G1 Z25 F6000"

image R50 C0 L"hline.img"
button R51 C0 F0 T"<" A"return"
button T" Home All " A"M98 P/sys/homeall.g"

dc42

Please run M122 and check the value shown as Never Used RAM.

spw

Never used ram: 76

value with smaller menu: 468
value without screen (no M918): 5968

dc42

That's the problem then, RepRapFirmware has run out of RAM. Try creating fewer elements per menu page.

spw

What value I should be aiming for safe operation?

dc42

I suggest you aim for at least 200 bytes free, after switching between different menus repeatedly and doing a print.

The difficulty is that RRF on the Duet WiFi/Ethernet supports up to 12 stepper drivers, so it needs more RAM for the movement buffers than the Maestro does.

spw

I'm using only 3 motors is there an easy way to free this memory, I can recompile firmware if needed.

dc42

@spw said in Duet Wifi 3.2beta2 crashes with long menu file:

I'm using only 3 motors is there an easy way to free this memory, I can recompile firmware if needed.

Yes, you can reduce the value of NumDms in file Move.h. I suggest you reduce the *8 to *4.

spw

Thank you it helped a lot. I reduced *8 to *5 and it doubled free memory, now with the complex menu, I still have 4000+ bytes free.

Since the memory is dynamically allocated do you think you could add a GCode to reallocate this buffer so I don't have to recompile firmware with every version, I think other users would benefit too since 4 motors + 1 or 2 heater is the most common setup.

seraser

@spw said in Duet Wifi 3.2beta2 crashes with long menu file:

Thank you it helped a lot. I reduced *8 to *5 and it doubled free memory, now with the complex menu, I still have 4000+ bytes free.

Since the memory is dynamically allocated do you think you could add a GCode to reallocate this buffer so I don't have to recompile firmware with every version, I think other users would benefit too since 4 motors + 1 or 2 heater is the most common setup.

Can you share your compiled firmware with only 5 motors?

spw

Duet2CombinedFirmware.bin