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by mikemoy
Thu May 17, 2018 11:30 am
Forum: General Discussion
Topic: More LAN8720 IP issues
Replies: 9
Views: 4211

Re: More LAN8720 IP issues

Just a quick question to confirm. I don't see how you are enabling / disabling the 50mhz clock on the Ethernet board. Are you really following the instructions from https://sautter.com/blog/ethernet-on-es ... g-lan8720/ You board should have a jumper from the OSC en pin to the NC pin on the header, ...
by mikemoy
Thu May 17, 2018 11:12 am
Forum: Showcase
Topic: New ESP32-WROVER Ethernet Board
Replies: 34
Views: 20115

Re: New ESP32-WROVER Ethernet Board

I agree that the cost of the RJ45 is high. However it has a few features that I like in it over others I have looked at. such as filtering on the POE lines, and I want to keep the size down, so having the transformer built in is a plus as well. As for the POE module. I am still keeping the original ...
by mikemoy
Wed May 16, 2018 12:22 pm
Forum: Showcase
Topic: New ESP32-WROVER Ethernet Board
Replies: 34
Views: 20115

Re: New ESP32-WROVER Ethernet Board

I started on that design last week ;) I found a few Rj45's that have the magnetics and access to the power pins. https://www.digikey.com/product-detail/en/pulse-electronics-network/JKM-0201NL/553-3218-ND/5800452 I also added this POE module to the design. It can be added on top of the module for tho...
by mikemoy
Wed May 16, 2018 1:58 am
Forum: General Discussion
Topic: Sudden Power Off of ESP32
Replies: 5
Views: 1686

Re: Sudden Power Off of ESP32

Not sure I follow what you are asking. This is not a Linux type system where it would need a proper shutdown.
It's like any other micro. Sudden loss of power is not an issue.
by mikemoy
Wed May 16, 2018 1:54 am
Forum: General Discussion
Topic: Suitable JTAG for ESP32
Replies: 5
Views: 1500

Re: Suitable JTAG for ESP32

Personally, I am not a JTAG fan, never needed more than a simple printf.
That being said, I can tell you that the following does work just fine for the ESP32.
https://www.olimex.com/Products/ARM/JTAG/ARM-USB-OCD-H/
by mikemoy
Wed May 16, 2018 1:49 am
Forum: General Discussion
Topic: Auto program Boot Flasher is still mysterious!
Replies: 7
Views: 4389

Re: Auto program Boot Flasher is still mysterious!

I tried the 1nf, but it worked on a few but not all prototypes. So I kept upping the capacitance while monitoring it with an oscilloscope until i got to a stable work ability across all boards. 0.1uf was the sweet spot for me, but you mileage may vary ;)
by mikemoy
Tue May 15, 2018 8:00 pm
Forum: General Discussion
Topic: Auto program Boot Flasher is still mysterious!
Replies: 7
Views: 4389

Re: Auto program Boot Flasher is still mysterious!

I made my own programming board as well. Start with sticking a 0.1uf cap on EN to GND.
by mikemoy
Thu May 10, 2018 4:17 pm
Forum: ESP32 IDF
Topic: SPI DMA and interrupts...
Replies: 4
Views: 2174

Re: SPI DMA and interrupts...

There is an example of pre-transfer callback in \esp-idf\examples\peripherals\spi_master
There is also a post-transfer callback as well that you can setup to tell you when the transfer is complete.
http://esp-idf.readthedocs.io/en/latest ... aster.html
by mikemoy
Thu May 10, 2018 12:50 pm
Forum: Showcase
Topic: New ESP32-WROVER Ethernet Board
Replies: 34
Views: 20115

Re: New ESP32-WROVER Ethernet Board

Moved from News to Showcase, as it seems to give a bit of discussion. Thanks, you were correct. I should have put it here, sorry. Sorry guys, I did not get any e-mail alerts on this topic after I posted it so I just assumed that people thought it was a silly idea, and have done nothing with it sinc...
by mikemoy
Wed May 09, 2018 4:38 pm
Forum: General Discussion
Topic: Ideas on testing memory
Replies: 6
Views: 1533

Re: Ideas on testing memory

Not sure if you wanted to have your own test code for this, but did you see "Run memory test on SPI RAM initialization" in menuconfig ?

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