Search found 6 matches

by jcwren
Thu Jun 25, 2020 3:58 pm
Forum: ESP-IDF
Topic: OTG Host on ESP32-S2?
Replies: 8
Views: 1712

Re: OTG Host on ESP32-S2?

There is a official post about ESP-IDF support for new ESP32-S2 features. I found it while looking for WiFi ToF documentation so it's not actually that hard to find. https://esp32.com/viewtopic.php?f=10&t=14532 Still should be in the docs, not some random post. Also, that list hasn't been updated i...
by jcwren
Thu Jun 25, 2020 12:55 pm
Forum: ESP-IDF
Topic: OTG Host on ESP32-S2?
Replies: 8
Views: 1712

Re: OTG Host on ESP32-S2?

The problem I have is there's no disclaimer anywhere that I can find that USB OTG firmware support doesn't exist. At the very least the API docs should include an entry for it and a note in parenthesis or a paragraph that states it's status. The only real reason I can see for choosing an ESP32-S2 ov...
by jcwren
Thu Jun 25, 2020 1:27 am
Forum: ESP-IDF
Topic: OTG Host on ESP32-S2?
Replies: 8
Views: 1712

Re: OTG Host on ESP32-S2?

Seems pretty odd that everything regarding the ESP32-S2 is touting it's USB OTG, yet there is absolutely no support for it anywhere.

It's kind of hard to design a product based on the promise of USB OTG if there's no support for it.
by jcwren
Wed Jun 20, 2018 2:10 pm
Forum: General Discussion
Topic: BLE Object Transfer Service OACP advice?
Replies: 2
Views: 1828

Re: BLE Object Transfer Service OACP advice?

Yes, I did see that, but it wasn't clear to me if a service need only one OACP descriptor, or one for each operation. Part of that lack of understanding was exacerbated by there being no OTS support in the esp-idf libraries. I found a couple of BT devices that do support OTS, and they all only had a...
by jcwren
Tue Jun 19, 2018 1:47 am
Forum: General Discussion
Topic: BLE Object Transfer Service OACP advice?
Replies: 2
Views: 1828

BLE Object Transfer Service OACP advice?

I've got a BLE profile working nicely, and I'm trying to add Object Transfer Service support for firmware updates. There's one piece (so far...) that I'm having a really difficult time with, and that's how to specify the OACP characteristic table. The BT specs are really opaque, at least to me. Belo...
by jcwren
Mon May 29, 2017 2:31 am
Forum: General Discussion
Topic: I2S: dma_buf_count and dma_buf_len values for receive?
Replies: 6
Views: 6227

I2S: dma_buf_count and dma_buf_len values for receive?

I'm trying to understand how to determine the values for dma_buf_count and dma_buf_len when receiving (or transmitting...) I2S data. I've read through the i2s_example_main.c, and understand how to calculate the values if I'm synthesizing a waveform, but I don't understand how to determine the values...

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