Mesa 7i96s with 7i74 and additional pwmgen

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28 May 2026 19:02 #346710 by Lennart
Hi,
I am currently running a 7i96S with a 7i74 sserial card (7i96s_7i74d.bin), but I need a second hardware PWM generator (pwmgen.01) on Step 5 (or any available physical Step pin) to modulate my Raycus fiber laser with a variable duty cycle. Is it possible to configure the 7i96s like that ?

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28 May 2026 21:05 - 28 May 2026 23:14 #346713 by PCW
7I96S+7I74 firmware with Step4 (last stepgen of 0..4) replaced with PWM 1
(Dir 4 is just GPIO)

 

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File Name: 7i96s2p_7i74d.zip
File Size:324 KB

 
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Last edit: 28 May 2026 23:14 by PCW.

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29 May 2026 10:39 #346727 by Lennart
Replied by Lennart on topic Mesa 7i96s with 7i74 and additional pwmgen
Great! Thank you very much!

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02 Jun 2026 17:21 #346854 by Lennart
Replied by Lennart on topic Mesa 7i96s with 7i74 and additional pwmgen
Hello again,Somehow I'm struggling to flash the configuration:
mesaflash --write
returns a success message, but running
--readhmid
afterwards shows absolutely no change.I've tried it with my newly generated bin file (
7i96s2p_7i74d.bin
), but also with various other configurations. I made sure to execute
--reload
and also did several hard power cycles (power resets). I checked the board status using
--verbose
, and it looks like fallback is not active.Does anyone have an idea what could be blocking the update, or what I might be missing?

I attached my terminal outputs.Thanks in advance!
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02 Jun 2026 17:40 #346856 by PCW
Not sure, works for me:

mesaflash --device 7i96s --addr 10.10.10.10 --write 7i96s2p_7i74d.bin --reload

md5sum 7i96s2p_7i74d.bin
b77b9faf82730e3acf82c2cdcba6e022  7i96s2p_7i74d.bin

mesaflash --device 7i96s --addr 10.10.10.10 --readhmid > 7i96s2p_7i74d.txt

gives me:


 

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File Name: 7i96s2p_7i74d.txt
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