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by mikemoy
Fri Jul 10, 2020 11:16 am
Forum: General Discussion
Topic: Ethernet PHY best practices for low cost design
Replies: 11
Views: 257

Re: Ethernet PHY best practices for low cost design

To get around the issue with option A, that interferes with flashing when using GPIO0, I used the EN pin of the ocilator to disable its clock output. See post here. https://www.esp32.com/viewtopic.php?f=17&t=5479&start=30#p55405 I have not tried Option C, though if i ever tried to re-design the boar...
by mikemoy
Wed Jun 17, 2020 12:47 am
Forum: General Discussion
Topic: UART baud rate >460800 leads to partial garbage
Replies: 12
Views: 768

Re: UART baud rate >460800 leads to partial garbage

I am glad the solution was found. But next time you might want to mention that you messed with menuconfig.
It helps others to know that you were not running stock.
by mikemoy
Tue Jun 16, 2020 6:45 pm
Forum: Hardware
Topic: esp32-wroom-32 start on battery power on without requiring boot button
Replies: 7
Views: 385

Re: esp32-wroom-32 start on battery power on without requiring boot button

Check out section "2.1.2 Power-on Sequence and System Reset" of the esp32 hardware design guidelines.
https://www.espressif.com/sites/default ... nes_en.pdf
by mikemoy
Tue Jun 16, 2020 6:37 pm
Forum: Hardware
Topic: Custom PCB Not working
Replies: 7
Views: 576

Re: Custom PCB Not working

Without posting a schematic, its all guesswork.
by mikemoy
Thu Jun 11, 2020 3:42 am
Forum: General Discussion
Topic: gpio output
Replies: 2
Views: 288

Re: gpio output

LeonardRenner wrote:
Wed Jun 10, 2020 9:18 am
Hello,

What is the electronic wiring of an output?
Is it a Open collector or a totem-pole ?
or open emitter or other else.

can i use it as tristate ?
on, off, nothing ?

Thanks


That information is in the data sheet.
by mikemoy
Mon Jun 08, 2020 3:03 am
Forum: General Discussion
Topic: How To Learn Pure C with FreeRTOS on ESP32
Replies: 2
Views: 298

Re: How To Learn Pure C with FreeRTOS on ESP32

I have not bought this class, but he has a section on freeRTOS.
https://www.learnesp32.com/1_course-introduction
by mikemoy
Tue Jun 02, 2020 4:26 pm
Forum: General Discussion
Topic: ESP Ethernet custome boards going to fail in FCC
Replies: 6
Views: 501

Re: ESP Ethernet custome boards going to fail in FCC

yagnik, I know it way late for this but if you cant get it sorted out you may want to try this.
viewtopic.php?f=17&t=5479&start=30#p55405

You can dump U9 and its supported components, and make it much simpler.
by mikemoy
Mon Jun 01, 2020 1:32 am
Forum: ESP32 IDF
Topic: Does use of newlib nano format reduce stack usage?
Replies: 6
Views: 651

Re: Does use of newlib nano format reduce stack usage?

Not to be rude, but in the time it took you to write the post to ask the question, you could have already re-compiled it using nano to see for yourself.
by mikemoy
Tue May 05, 2020 5:58 pm
Forum: Hardware
Topic: Flashing DevKitC from external Serial Converter
Replies: 3
Views: 496

Re: Flashing DevKitC from external Serial Converter

How are you going to program your DevKitC with the ESP-PROG when the DevKitC has its own onboard programmer circuit?
You can't have 2 circuits trying to program the same device.

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