Sparkfun AST-CAN485 firmware corruption problem

[omarachrafbrasil]

I have 3 Sparkfun AST-CAN485 board deployed in a solution to my customers. They had the firmwares corrupted after about 3 weeks of usage.

The firmware in the board interfaces a 3 axis joystick converting movements to Pelco-D packets in the 485 line. The board raw pin is connected to a 12.05 VDC Siemens power supply connected to a Inverter connected to a car battery on a running vehicle (car). I have a relay switch the turns on/off the 12 vdc line.
It was working for about 3 weeks and suddenly stopped. The AST-CAN85 firmware and its boot loader becomes corrupted.

Someone knows what can be happened?

Attached my diagram of the board and joystick.

[Nom-it]

Hi Omarachrafbrasil,

I'm currently having sort of the same issue. Using a car battery to supply RAW voltage input, after a while, the firmware gets corrupted. (seems an EEprom corroption).
Did you eventually find the issue with the board/setup?

[omarachrafbrasil]

Hi, after I set fuse bits to prevent brown out I don't the problem anymore. Regards Omar Achraf Em qua, 11 de mar de 2020 10:52, Nom-it <notifications@github.com> escreveu:

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Hi Omarachrafbrasil, I'm currently having sort of the same issue. Using a car battery to supply RAW voltage input, after a while, the firmware gets corrupted. (seems an EEprom corroption). Did you eventually find the issue with the board/setup? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AK2MODWLBCLYKFLDNKWAVIDRG6JTNANCNFSM4GGYSJPQ> .