Search found 1537 matches

by kolban
Sun Jun 24, 2018 11:31 pm
Forum: Hardware
Topic: [Answered]: Distinction between a pad and a pin?
Replies: 2
Views: 45

Re: [Answered]: Distinction between a pad and a pin?

Thank you sir. I had to go and read what a "QFN" was. For those who didn't know (like me) it is a "Quad Flat No-leads package". See: https://en.wikipedia.org/wiki/Quad_Flat_No-leads_package For the purposes of our ESP32 discussions, this appears to be how raw ESP32 ICs come from ...
by kolban
Sun Jun 24, 2018 6:45 pm
Forum: Hardware
Topic: [Answered]: Distinction between a pad and a pin?
Replies: 2
Views: 45

[Answered]: Distinction between a pad and a pin?

As I study the ESP32 technical reference manual, I come across the term "pad". I have intuitively been mentally thinking of these as what I would call a "pin" or a "GPIO pin" but it dawns on me that words have power and I may be wrong and too loose on my thinking. Can a...
by kolban
Sun Jun 24, 2018 6:43 pm
Forum: Hardware
Topic: GPIO matrix input 1 to many, output 1 to 1
Replies: 1
Views: 28

GPIO matrix input 1 to many, output 1 to 1

Am studying the GPIO matrix as described in the ESP32 Technical reference Manual (4.1 - Overview) and am reading about the distinction between inputs and outputs. If I am understanding correctly, the input arriving on a pad from an external source can be mapped to multiple of the internal peripheral...
by kolban
Sat Jun 23, 2018 11:50 am
Forum: General Discussion
Topic: Very accurate timer implementation
Replies: 2
Views: 98

Re: Very accurate timer implementation

My gut is saying I would look at the RMT peripheral functions. This appears to be able to record pulse transitions down to 12.5 nanoseconds (1/80Mhz). See:

http://esp-idf.readthedocs.io/en/latest ... s/rmt.html
by kolban
Fri Jun 22, 2018 11:32 pm
Forum: General Discussion
Topic: trying to read an ADC GPIO
Replies: 10
Views: 256

Re: trying to read an ADC GPIO

This is the page I normally go to:

http://esp-idf.readthedocs.io/en/latest ... /gpio.html

If it needs updating with new findings, post about it.
by kolban
Fri Jun 22, 2018 12:52 am
Forum: General Discussion
Topic: how to resolve packet loss issue?
Replies: 10
Views: 278

Re: how to resolve packet loss issue?

Over multiple tests, is it the same "piece" of the received file that differs from the original file? Can we tell where data is being lost? Are you logging the lengths of received data and sent data? I'd like to determine whether the problem is in transmitting data or writing files. For ex...
by kolban
Thu Jun 21, 2018 10:52 pm
Forum: General Discussion
Topic: trying to read an ADC GPIO
Replies: 10
Views: 256

Re: trying to read an ADC GPIO

I'd suggest wiring GPIO 35 directly to 3.3V and see if the output is other than 0. That will eliminate half the logic as a problem.
by kolban
Thu Jun 21, 2018 2:18 pm
Forum: General Discussion
Topic: how to resolve packet loss issue?
Replies: 10
Views: 278

Re: how to resolve packet loss issue?

Not really enough to go here (opinion). Is this a TCP or UDP socket? What makes you think that packets get lost? Are you checking the return code from send()?
by kolban
Thu Jun 21, 2018 2:12 pm
Forum: General Discussion
Topic: TCP server: assertion "netconn_alloc: undefined netconn_type" failed
Replies: 2
Views: 110

Re: TCP server: assertion "netconn_alloc: undefined netconn_type" failed

I think it would be useful to know which source statement in the user application is being called which generates the failure. Hopefully it is the same statement each time.
by kolban
Thu Jun 21, 2018 7:26 am
Forum: General Discussion
Topic: Maximum usable nvs in wroom32
Replies: 1
Views: 62

Re: Maximum usable nvs in wroom32

I'm not sure there is a hard-limit on NVS storage other than the amount of flash available and that you allocate. You may have to move the partition to a different location. If it starts at 0x9000 and the next partition starts at 0xf000 then the difference is 24K. You couldn't (for example) make it ...

Go to advanced search