eez-open / modular-psu-firmware

Firmware for EEZ Bench Box 3 (BB3)
https://www.envox.eu/eez-bb3/
GNU General Public License v3.0
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Function generator: small frequency difference between DCP and MIO168 module #294

Open fietser28 opened 2 years ago

fietser28 commented 2 years ago

With the following settings in function generator:

DCP#2, DOUT1, AOUT1 all to pulse, 200ms period, 50ms pulse width: image image image

When I turn the output on, this is shown (single trigger on turn-on): image They all trigger at the same time as expected, duration of DCP is slightly below 50ms. The next few triggers I see some jitter between the pulses.

If I keep the output running and wait a bit, I can see the DCP and MIO pulses shift in time the MIO pulse gets ahead of the DCP pulse. After 60 sec, it looks like: image

And after 210 sec: image

Sometimes there also is a small jump.

Running 1.8-alpha2 and 0.12 on MIO168.