Search found 831 matches

by kolban
Thu Jul 27, 2017 3:11 am
Forum: ESP32 HDK
Topic: DMA and Camera input - a notion about 16bit input data
Replies: 0
Views: 4

DMA and Camera input - a notion about 16bit input data

I've been studying the OV7670 camera and the I2S support in ESP32. Specifically, I've been studying the DMA support provided by the I2S peripheral. As I understand the story, the OV7670 presents data in 8bit units each camera clock cycle. The camera becomes the master and the ESP32 becomes the DMA s...
by kolban
Wed Jul 26, 2017 10:51 pm
Forum: ESP32 Arduino
Topic: get uuid of esp32 ble on arduino
Replies: 2
Views: 90

Re: get uuid of esp32 ble on arduino

What API library are you using to work with BLE in an Arduino environment on the ESP32?
by kolban
Wed Jul 26, 2017 7:00 pm
Forum: Showcase
Topic: JavaScript on ESP32 - Duktape
Replies: 59
Views: 8033

Re: JavaScript on ESP32 - Duktape

The Duktape support provides a JavaScript environment for writing JavaScript based applications. Much of it is itself written in JavaScript. If you are comfortable programming in a C or C++ environment, I would suggest sticking to that as you will find the most pre-existing code fragments and answer...
by kolban
Tue Jul 25, 2017 1:22 pm
Forum: General Discussion
Topic: A fatal error occurred: Timed out waiting for packet header
Replies: 1
Views: 35

Re: A fatal error occurred: Timed out waiting for packet header

Howdy, The search on this forum is unfortunately poor ... so it is very understandable that you couldn't find previous matches to your question. However there is a good work around. Go to google and search with exactly the following: site:esp32.com Timed out waiting for packet header The prefix at t...
by kolban
Tue Jul 25, 2017 1:17 pm
Forum: General Discussion
Topic: esp32 ble scan
Replies: 5
Views: 361

Re: esp32 ble scan

I'm way over my head here ... but a thought strikes me ... it was my understanding that three channels in the BLE radio spectrum were dedicated to advertising and that the BLE protocol says that all three are used by every advertiser ... meaning that an advertiser will advertise on all three channel...
by kolban
Mon Jul 24, 2017 8:16 pm
Forum: ESP32 SDK
Topic: clear terminal
Replies: 1
Views: 40

Re: clear terminal

Howdy, When you are using an ESP32 you can attach a terminal emulator or other application to the serial port input into your PC. This input will come as output of the ESP32 serial connection. This is not a "full screen" stream but is instead just a sequence of diagnostic lines that get ap...
by kolban
Mon Jul 24, 2017 3:25 pm
Forum: ESP32 HDK
Topic: Guru Meditation Error of type IllegalInstruction?
Replies: 7
Views: 122

Re: Guru Meditation Error of type IllegalInstruction?

When I hit problems like this my technique for debugging is slow and painfull ... I isolate (comment out) sections of logic until I have a minimum environment in which the problem manifests. This removes as much "chaff" from the puzzle as possible. When I have a minimum problem, I then cop...
by kolban
Mon Jul 24, 2017 3:51 am
Forum: ESP32 Arduino
Topic: What is the meaning of startup text on ESP32
Replies: 6
Views: 227

Re: What is the meaning of startup text on ESP32

Howdy, There is a good load of information found here: http://esp-idf.readthedocs.io/en/latest/ and also the Technical Reference Manual contains lot of good information at the lowest possible levels ... see: http://espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf
by kolban
Mon Jul 24, 2017 3:45 am
Forum: General Discussion
Topic: What is the function of partitions_singleapp.bin?
Replies: 2
Views: 29

Re: What is the function of partitions_singleapp.bin?

In what context is this phrase/statement/application/definition used? Is it contained in the documentation somewhere or is it a file found in one of the projects?
by kolban
Sun Jul 23, 2017 8:54 pm
Forum: ESP32 SDK
Topic: [Question]: Maximum interrupt rate on GPIO
Replies: 3
Views: 35

Re: [Question]: Maximum interrupt rate on GPIO

Thank you Mr ESP_Igrr ... I haven't run the test yet but added it to my list of things to try. Let us assume that it does take 2µS to execute the most trivial interrupt handler (using the ESP-IDF framework as described in previous post), then that would appear to say that we are able to process 500,...

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