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We noticed that when we power up the Revolution Pi Compact, all 8 DIGITAL OUT pins switch to HI for a brief period, perhaps 5-10ms. This happens during every boot. What can I do?
Yes, this is unfortunately a known issue. We are currently working on this bug. Unfortunately, we can't influence the behaviour. The output pins on the Compact come directly from the compute module, and we have no influence on this behaviour at boot time.
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Would it be possible to switch off the watchdog timer for the digital outputs of the RevPi Compact Module?
Unfortunately, it is impossible to deactivate the watchdog without hardware modifications.
The digital outputs of the RevPi Compact Module cause a peak when switching on, what can I do?
What was the solution?
There is a workaround that fixes this behaviour on reboot, see here:
What is the XXX chip used to multiplex analogue to digital conversions (item 2)?
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The multiplexer: DG408LE
the selection of the analog input is done via GPIO6, GPIO12 and GPIO13
GPIO | DG408LE |
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GPIO6 | A0 |
GPIO12 | A1 |
GPIO13 | A2 |
How can I access the Digital Inputs / Outputs from Codesys?
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No, the range is 0 - 10 V.
8 x analog Inputs |
2 x analog Outputs |
https://revolution.kunbus.com/revpi-compact/
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