Search found 16 matches

by machdisk
Sat Nov 21, 2020 5:27 am
Forum: Pyboard D-series
Topic: Interrupt Delays and read_timed
Replies: 2
Views: 104

Re: Interrupt Delays and read_timed

After stepping away from this issue for a few hours, I had a few realizations (many of which turned out not to be quite right), but a key finding is that there was sufficient ringing on the input trigger to also trigger a second acquisition using read_timed on the falling edge. To be clear, I was us...
by machdisk
Fri Nov 20, 2020 6:41 pm
Forum: Pyboard D-series
Topic: Interrupt Delays and read_timed
Replies: 2
Views: 104

Interrupt Delays and read_timed

I am trying to synchronize an external trigger with the start of the read_timed function into a buffer. The issue that I'm having is that the start of the read_timed function appears to be delayed from the timing of the interrupt pin. My mechanism of testing this is to have the start of the input wa...
by machdisk
Fri Nov 20, 2020 1:40 am
Forum: Pyboard D-series
Topic: SD card not working in D-series
Replies: 11
Views: 3123

Re: SD card not working in D-series

I too am having the same issue (i.e. OSError: 16). I've tried mouting via boot.py and repl and still get the same behavior. I've tried this on 1.13 and 1.12 and a PYBD SF3W. Any ideas are welcome. I am having a similar issue with a PYBD-SF2W where the SD card is present but will not mount. The boot ...
by machdisk
Tue Nov 17, 2020 10:36 pm
Forum: General Discussion and Questions
Topic: ADC performance of MicroPython boards
Replies: 10
Views: 10004

Re: ADC performance of MicroPython boards

Report on the Pyboard-D SF3W running Micropython 1.13-173: With machine.freq(48000000) the code at http://www.robertocolistete.net/MicroPython/ADC_timedtimer_Pyboard.py yields sample rates that vary between 435 and 477 kSps. @ machine.freq(216000000) the script yeilds rates that hover just around 21...
by machdisk
Sun Nov 08, 2020 2:52 am
Forum: Pyboard D-series
Topic: High Speed USB PHY
Replies: 7
Views: 2010

Re: High Speed USB PHY

Can anyone confirm whether settting the USB parameter to "high speed" addresses this issue? Alternatively, is there a way to use the EMMC module to log locally and tranfer later? https://store.micropython.org/product/WBUS-EMMC
by machdisk
Sun Jul 09, 2017 3:06 am
Forum: Programs, Libraries and Tools
Topic: Redis client, packaging questions
Replies: 22
Views: 9384

Re: Redis client, packaging questions

I can second this concern. Using an older version of the uredis package on older wipy (v1.0) seemed to work fine with some of the board firmware. In trying this out again on the Wipy 2, there seems to be some sort of non-specific time-out error. Functionality similar to what redis provides seems qui...
by machdisk
Mon Nov 07, 2016 12:53 am
Forum: WiPy and CC3200 boards
Topic: DAQ Trigger Setup and Control
Replies: 7
Views: 3969

Re: DAQ Trigger Setup and Control

With some nudging from folks here on the forums (thank you), I feel like I'm on the right track. The challenge that I'm now facing is how to stop or change the callback correctly. From what I read there is some disagreement for the pyb vs the wipy timer function. As it stands I put in a global "trig...
by machdisk
Sun Nov 06, 2016 2:29 pm
Forum: WiPy and CC3200 boards
Topic: DAQ Trigger Setup and Control
Replies: 7
Views: 3969

Re: DAQ Trigger Setup and Control

Ahh, yes that is a sound solution. I will surely give that a try. The one aspect I'm still not clear on is whether or not the timer callback is actually changed in the loop above. Is there anyway to confirm that the callback has been changed?
by machdisk
Sun Nov 06, 2016 5:39 am
Forum: WiPy and CC3200 boards
Topic: DAQ Trigger Setup and Control
Replies: 7
Views: 3969

Re: DAQ Trigger Setup and Control

So I've been returning to this issue and am trying to figure the approach to stopping the callback in an elegant and defined fashion. I am trying to fill an array and essentially perform some signal averaging. To do this, my idea was to loop through the array a set number of times. The question is h...
by machdisk
Fri Jul 08, 2016 5:55 am
Forum: WiPy and CC3200 boards
Topic: WiPy Binary Updates
Replies: 3
Views: 2409

Re: WiPy Binary Updates

After updating to the latest version of micropython on the wipy it was my hope to utilize the following function. Can anyone comment on how to access this pulse function? It doesn't appear to be in the latest build but it is in the documentation. machine.time_pulse_us(pin, pulse_level, timeout_us=10...