Search found 40 matches

by opcode_x64
Sat Feb 13, 2021 7:45 pm
Forum: ESP-IDF
Topic: Wavelet Packet Transformation ?!
Replies: 0
Views: 95

Wavelet Packet Transformation ?!

Hello everybody,

I hope you all doing fine during the covid-19 time!

Does anyone have and can share a simple library for the Wavelet Packet Transformation (WPT) ?! As far as I know the DSP library of ESP-IDF does not include the WPT.

Thank you !

Best regards and stay health !
opcode_x64
by opcode_x64
Sat Sep 05, 2020 9:18 pm
Forum: ESP-IDF
Topic: (solved) connecting to Wifi using static IP
Replies: 5
Views: 1166

Re: conntecting to Wifi using static IP

Hey, without seeing any code: As far as I know and understand the WiFi driver is independent from the TCP/IP layer, meaning connecting to an access point has nothing to do with TCP/IP at first. After your connection is established, then your access point is assigning your device (ESP32) an IP addres...
by opcode_x64
Sat Sep 05, 2020 9:08 pm
Forum: ESP-IDF
Topic: SPI Rx abort
Replies: 1
Views: 421

Re: SPI Rx abort

Hello,

can you maybe tell more about your motivation for doing that ? Maybe other readers can find an alternative solution for you ?

Best regards,
opcode_x64
by opcode_x64
Fri Aug 28, 2020 3:31 pm
Forum: ESP-IDF
Topic: NEW ESP-IDF VERSION BUG ? -> Assembly File cannot be compiled
Replies: 1
Views: 501

NEW ESP-IDF VERSION BUG ? -> Assembly File cannot be compiled

Hello everybody, I am trying to implement a high level interrupt in the new esp-idf version. To make sure, that error messages are not coming from my code, I used the example template in esp32 dcouments: .section .iram1,"ax" .global xt_highint5 .type xt_highint5,@function .align 4 xt_highint5: rsr a...
by opcode_x64
Tue Aug 25, 2020 6:01 pm
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 7
Views: 2290

Re: Fast SPI communication with external ADC

Hello bienvenu, at first I want to apologize for replying so late... due to other things at work I had no time to continue on that topic. Secondly I want to thank you very much for providing this information ! It is possible to share a minimal example code which I can study in more detail ? Maybe a ...
by opcode_x64
Thu Jun 11, 2020 10:37 am
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 7
Views: 2290

Re: Fast SPI communication with external ADC

Hello PeterR, First, thank you for your quick reply ! I also believe, that hardware only solution is not possible, but I wanted to ask about that before burying the idea :-) Like you mentioned, on core1 only the sampling process is executed, and on core0 all other things are executed (sending data o...
by opcode_x64
Thu Jun 11, 2020 9:10 am
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 7
Views: 2290

Fast SPI communication with external ADC

Hello everbody, Firstly, I hope you all are good within the Covid-19 time... I want to read out an external analog digital converter (adc) with an esp32. The communication between esp32 and the adc is done by SPI. The adc uses a digital output signal called DRDY to signalize when a sample is ready t...
by opcode_x64
Thu Apr 23, 2020 4:54 pm
Forum: ESP-IDF
Topic: Synchronized Variable between Task and Interrupt Routine
Replies: 0
Views: 1145

Synchronized Variable between Task and Interrupt Routine

Hello community, I am realy feeling a little guilty for my increased posts in the last time, but I would really not disturb you if not needed... For the sake of understanding and to help other users in making this issue/question independent of my other posts, I decided to make start a new post with ...
by opcode_x64
Wed Apr 22, 2020 9:36 pm
Forum: ESP-IDF
Topic: How to call C function from assembly ?
Replies: 2
Views: 922

Re: How to call C function from assembly ?

Hey ESP_Sprite, thanks for your help :) . Actually I want to call a function in C which uses with Inline Assembler the s32c1i function for lock and unlock operation of synchronized variables between the high level interrupt on core1 (Producer) and a consumer Task on core0. The C functions for lock a...

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