Search found 40 matches
- Wed Aug 07, 2019 10:26 pm
- Forum: MicroPython pyboard
- Topic: more detail tutorial for external C modules?
- Replies: 6
- Views: 4717
more detail tutorial for external C modules?
I'm trying to write a software bit banging c modules for an non standard protocol, which is similar to I2C. I follow this tutorial, looks like working but I still have a lot of questions. I'm not good in C, detail tutorial will be very help! https://docs.micropython.org/en/latest/develop/cmodules.ht...
- Wed Aug 07, 2019 8:53 pm
- Forum: MicroPython pyboard
- Topic: Extended Length Socket Pins
- Replies: 2
- Views: 2012
Re: Extended Length Socket Pins
I just did, isn't standard 0.100" (2.54mm) header??
I was using those.
https://www.digikey.com/product-detail/ ... ND/1094289
https://www.digikey.com/product-detail/ ... ND/1002538
I was using those.
https://www.digikey.com/product-detail/ ... ND/1094289
https://www.digikey.com/product-detail/ ... ND/1002538
- Thu Jul 18, 2019 8:33 pm
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
I have more question...
Is it any free to use R/W register that I can save calibration value for each board, that won't get erase even Factory reset?
Is it any free to use R/W register that I can save calibration value for each board, that won't get erase even Factory reset?
- Thu Jul 04, 2019 12:18 am
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
I think some hardware issues on my side, I have multiple IO, ADCs, connect to other device. The issue is when I power cycle other device once a while cause pyboard ADC not working anymore. But if I power down by steps, 3.3, 2.5, 2, 1.5..0 and the issue fixed.
- Wed Jul 03, 2019 8:19 pm
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
more questions....
adc = ADC(Pin('X19'))
adc.read() # read value, 0-4095
How to turn off adc ?? I try dir(adc) it give me this.. "['__class__', 'read', 'read_timed', 'read_timed_multi']", looks like no way to do so?
https://test-ergun.readthedocs.io/en/la ... b.ADC.html
adc = ADC(Pin('X19'))
adc.read() # read value, 0-4095
How to turn off adc ?? I try dir(adc) it give me this.. "['__class__', 'read', 'read_timed', 'read_timed_multi']", looks like no way to do so?
https://test-ergun.readthedocs.io/en/la ... b.ADC.html
- Wed Jul 03, 2019 6:45 am
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
- Wed Jul 03, 2019 6:41 am
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
timer.deinit() looks good.. I will try tomorrow..
Yes! I want high impedance! or isolate, set pin.in() with pin pull up to None??
Yes! I want high impedance! or isolate, set pin.in() with pin pull up to None??
- Wed Jul 03, 2019 6:06 am
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
Thank you so much for your reply! I have two more questions. 1. how do I isolate/turn off pins after use them? Let say I do p0 = Pin(0, Pin.OUT) p0.value(0) how do I turn p0 off? is it Pin.off() ? What is the meaning off "Set pin to “0” output level." Is it mean isolate from outside?? https://docs.m...
- Thu Jun 27, 2019 12:19 am
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
- Wed Jun 26, 2019 6:06 pm
- Forum: MicroPython pyboard
- Topic: ADC measure negative voltage??
- Replies: 23
- Views: 15999
Re: ADC measure negative voltage??
thanks for advice, is good idea to add diodes.
currently works well, is very accurate, just wondering is it any bandgap reference pin on pyboard?
currently works well, is very accurate, just wondering is it any bandgap reference pin on pyboard?