Search found 25 matches

by marchingband
Thu Sep 12, 2019 6:35 pm
Forum: ESP32 IDF
Topic: example of HTTP server in AP mode?
Replies: 7
Views: 2005

Re: example of HTTP server in AP mode?

unfortunately the suggestions above do not work for esp-idf version 4.
Is anyone able to suggest code to run a softAP http server in v4.1?
or perhaps able to port the code?
by marchingband
Mon Apr 29, 2019 7:08 am
Forum: ESP32 ADF
Topic: Finding source files
Replies: 0
Views: 403

Finding source files

sorry if this is a noob question :

ESP-ADF says it is open source, yet, I cannot find the implementation of the function esp_equalizer_process(), only its definition in a header file.
Are there parts of the ADF for which the source is not available?
by marchingband
Thu Apr 25, 2019 8:29 am
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

I am happy to report it was indeed a short. The culprit was the sd->eMMC adapter card. The traces are very close together and short where they contact the micro->sd adapter. There is a sweet spot that prevents the short but keeps the connections intact. I am not sure why I didn't think to check for ...
by marchingband
Wed Apr 10, 2019 5:48 pm
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

Does cross-talk like this between signal lines point at the same signal integrity issues as before, in your experience? Or does this look like a driver issue?
thanks!
by marchingband
Tue Apr 09, 2019 1:58 am
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

it appears that BIT3 and BIT4 are OR'd,
likewise BIT7 and BIT8 are OR'd
by marchingband
Tue Apr 09, 2019 1:13 am
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

the errors are always in the 3rd,4th,7th or 8th bit ... does this again point at signal integrity on 2 of the 4 lines?
by marchingband
Tue Apr 09, 2019 1:06 am
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

I use 1-line mode to write numbers from 0-255 to the card. I use 4-line mode to read them back, using this code: #define BYTE_TO_BINARY(byte) \ (byte & 0x80 ? '1' : '0'), \ (byte & 0x40 ? '1' : '0'), \ (byte & 0x20 ? '1' : '0'), \ (byte & 0x10 ? '1' : '0'), \ (byte & 0x08 ? '1' : '0'), \ (byte & 0x0...
by marchingband
Sat Apr 06, 2019 6:20 pm
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

I will try those ideas out.
Thank you for your help, please let me know your findings!

In the meantime do you have a list of known compatible eMMC module/breakout/adapter boards?
by marchingband
Fri Apr 05, 2019 5:53 pm
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

these are the connections I am using, same as suggested in the sd_card example read_me, all with 10k pull-ups.

GPIO14 -> CLK
GPIO15 -> CMD
GPIO2 -> D0
GPIO4 -> D1
GPIO12 -> D2
GPIO13 -> D3
by marchingband
Fri Apr 05, 2019 5:13 pm
Forum: General Discussion
Topic: eMMC module
Replies: 19
Views: 2209

Re: eMMC module

here is an image of the circuit and adapters I am using.
proto_board.jpg
proto_board.jpg (902.56 KiB) Viewed 997 times

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