Search found 46 matches

by marchingband
Sat Mar 07, 2020 3:55 am
Forum: General Discussion
Topic: IO MUX or GPIO matrix with TOUCH pins and ADC pins.
Replies: 1
Views: 4102

IO MUX or GPIO matrix with TOUCH pins and ADC pins.

I'd like to be able to assign different pins for both the TOUCH sensor, and ADC peripherals. How can I use the IO MUX and/or the GPIO MATRIX to achieve this? I havn't been able to find any mention of it in docs, datasheets, or online, so maybe it is not possible at all? I have a WROVER Dev board, an...
by marchingband
Thu Sep 12, 2019 6:35 pm
Forum: ESP-IDF
Topic: example of HTTP server in AP mode?
Replies: 16
Views: 39063

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: ESP-ADF
Topic: Finding source files
Replies: 0
Views: 2644

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: 24
Views: 32063

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: 24
Views: 32063

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: 24
Views: 32063

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: 24
Views: 32063

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: 24
Views: 32063

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: 24
Views: 32063

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: 24
Views: 32063

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