Search found 17 matches

by jhinkle
Wed Aug 14, 2019 2:27 pm
Forum: ESP32 IDF
Topic: ESP32 CAM, I2S, DMA - questions
Replies: 1
Views: 427

Re: ESP32 CAM, I2S, DMA - questions

Is there anyone at Espressif that can answer my questions since I have been unable to find any Espressif documentation that addresses them?

Joe
by jhinkle
Tue Aug 13, 2019 1:52 pm
Forum: ESP32 IDF
Topic: ESP32 CAM, I2S, DMA - questions
Replies: 1
Views: 427

ESP32 CAM, I2S, DMA - questions

I'm trying to fully understand the CAM demo by igrr - but it seems the demo code does not agree with ESP32 documentation - hence these questions. From The ESP32 Tech ref manual on DMA - descriptors: descriptor parameter EOF set to identify the end of the DMA link list (also NEXT = 0) descriptor para...
by jhinkle
Fri Jul 26, 2019 8:44 pm
Forum: ESP32 IDF
Topic: Questions - ESP32 Camera beyond JPEG
Replies: 0
Views: 300

Questions - ESP32 Camera beyond JPEG

I have been studying your ESP32 Camera project on github to get an understanding on how I2S in camera mode and DMA works. I have several questions: More than three since there are multiple questions embedded in each below. #1. During the init process of DMA descr - fields EOF and OWNER are set or cl...
by jhinkle
Sat Dec 15, 2018 4:25 am
Forum: General Discussion
Topic: ESP32 vs ESP8266 Radio
Replies: 4
Views: 1374

Re: ESP32 vs ESP8266 Radio

Thanks for the comments. I had not thought of the rf attenuation if located close to the ground. The commercial product has an ESP8266 attached to the product's PCB along with 5 other microprocessors. It's in close proximity(all enclosed in the same pvc weather protection box) to a 360 watt 12v swit...
by jhinkle
Thu Dec 13, 2018 6:51 pm
Forum: General Discussion
Topic: ESP32 vs ESP8266 Radio
Replies: 4
Views: 1374

ESP32 vs ESP8266 Radio

I currently have a ESP8266 - using the IDF (FreeRTOS V3.0) and am having less than desirable satisfaction with its performance (outside). I am using the ESP8266 WROOM2 with trace antenna. For 2019 I am looking to upgrade to a ESP32 if I can expect better wifi performance. Are the two radios the same...
by jhinkle
Sat Dec 08, 2018 7:36 pm
Forum: ESP32 IDF
Topic: FreeRtos slow?
Replies: 13
Views: 3000

Re: FreeRtos slow?

Look into using the ULP.

It was designed to do exactly what you are asking.

Don't try to speed up FreeRTOS - that's the wrong approach.
by jhinkle
Sat Dec 08, 2018 7:23 pm
Forum: General Discussion
Topic: How to implement a simple UART bootloader
Replies: 3
Views: 2467

Re: How to implement a simple UART bootloader

The link regarding Kolban's response was about implementing a "custom Bootloader". To get an idea of where it started -- do a google search for "RBOOT" - or use the link below. https://richard.burtons.org/2015/05/ The ESP8266 had a fixed bootloader and no way of implementing an easy OTA. If I'm not ...
by jhinkle
Sat Dec 08, 2018 5:00 pm
Forum: ESP32 IDF
Topic: IDF documentation suggests microsecond delay - should be millisec
Replies: 0
Views: 704

IDF documentation suggests microsecond delay - should be millisec

In section "API Guide - Wi-Fi Driver" -- in sub-section "ESP32 Wi-Fi API Error Code" Currently: or recoverable errors, in which case you can write a recoverable-error code. For example, when esp_wifi_start returns ESP_ERR_NO_MEM, the recoverable-error code vTaskDelay can be called, in order to get a...
by jhinkle
Sat Dec 08, 2018 4:34 pm
Forum: General Discussion
Topic: How to implement a simple UART bootloader
Replies: 3
Views: 2467

Re: How to implement a simple UART bootloader

maldus: My first suggestion is to study much more on the topic. Your questions suggests you do not know enough to do this yourself and are looking for a solution already designed - which I can tell you is not to be found. As I understand, you have a board which contains an ESP32. It is connected to ...
by jhinkle
Sat Nov 17, 2018 4:53 pm
Forum: ESP32 IDF
Topic: WiFI events in EMC radiations test
Replies: 4
Views: 1155

Re: WiFI events in EMC radiations test

If a remote client connected with your AP -- you will get event - SYSTEM_EVENT_AP_STACONNECTED

If that remote client (STA) is disconnected from your AP - you will get event - SYSTEM_EVENT_AP_STADISCONNECTED

Hope that helps

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