Search found 26 matches
- Wed Jan 17, 2018 7:41 am
- Forum: ESP-IDF
- Topic: PDM-mode of I2S peripheral through i2s driver
- Replies: 7
- Views: 16412
Re: PDM-mode of I2S peripheral through i2s driver
Yes, I have been successful. My main issue ended up being a silly mix-up between number-of-samples and buffer size which I haven't discovered for the whole of two days or so... So I skipped half of the data that I was supposed to feed to the driver, which of course resulted in some terrible... "nois...
- Tue Dec 19, 2017 7:41 am
- Forum: ESP-IDF
- Topic: PDM-mode of I2S peripheral through i2s driver
- Replies: 7
- Views: 16412
Re: PDM-mode of I2S peripheral through i2s driver
Has anyone gotten PDM to run? Could they share their code?
- Mon Dec 18, 2017 1:23 pm
- Forum: ESP-IDF
- Topic: PDM-mode of I2S peripheral through i2s driver
- Replies: 7
- Views: 16412
Re: PDM-mode of I2S peripheral through i2s driver
Hi tuanpm, Thanks for the response. This is about what I gathered from the sources as well. Still, I'd be happy if you could answer my question: Is the PDM mode of the I2S peripheral built such, that it will always output 48kHz audio at a PDM-clock-rate of 6.144MHz? Furthermore, I wonder if I'm feed...
- Fri Dec 15, 2017 2:45 pm
- Forum: ESP-IDF
- Topic: PDM-mode of I2S peripheral through i2s driver
- Replies: 7
- Views: 16412
PDM-mode of I2S peripheral through i2s driver
Hello there, I've got an audio amplifier chip attached to the Rev. 1 ESP32 and I'm trying to get the PDM-mode of the i2s mode running without success so far. There are several things I struggle with and somehow no sound seems to emerge from my speakers, even though I tried multiple different combina...
- Thu Mar 16, 2017 2:52 pm
- Forum: General Discussion
- Topic: How does BLE/WiFi-Coexistence in the ESP32 work?
- Replies: 1
- Views: 5504
How does BLE/WiFi-Coexistence in the ESP32 work?
A very general question: A BLE peripheral has hard timing constraints and is required to receive and transmit during its short connection events. From my understanding, I would assume both technologies use the same radio peripheral in the ESP32-hardware and access to the peripheral would be governed...
- Wed Jan 18, 2017 7:04 am
- Forum: Report Bugs
- Topic: Bluetooth LE: Unable to connect Andorid >= 5.0 to ESP32 GATT server
- Replies: 4
- Views: 13740
Re: Bluetooth LE: Unable to connect Andorid >= 5.0 to ESP32 GATT server
Any news on this?
- Wed Jan 11, 2017 4:27 pm
- Forum: ESP-IDF
- Topic: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
- Replies: 6
- Views: 18417
Re: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
... and I almost feel like a spammer with all the BLE posts I write here :oops: I appreciate you It was a bit surprising to me that bluedroid was picked but I guess the other open source options like the Intel stack in zephyr and apache nimble stack are still developing. Thanks. I don't know what o...
- Wed Jan 11, 2017 10:45 am
- Forum: ESP-IDF
- Topic: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
- Replies: 6
- Views: 18417
Re: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
it does seem like there is a lot of value passing of buffer data between a bunch of handler lookup functions. Yes, that is true. From what I gather, part of the btc subsystem decouples all the ESP API calls from the rest of the bluetooth stack but doesn't do much further. So, for example when calli...
- Wed Jan 11, 2017 8:23 am
- Forum: ESP-IDF
- Topic: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
- Replies: 6
- Views: 18417
Re: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
That is great news to hear!
- Wed Jan 11, 2017 8:08 am
- Forum: ESP-IDF
- Topic: [Suggestion] BLE GATT Server: Improve handling of read/write/notify
- Replies: 6
- Views: 18417
[Suggestion] BLE GATT Server: Improve handling of read/write/notify
When implementing a GATT server, the current handling of GATT read events seems rather convoluted and inefficient to me. In my understanding of Bluetooth LE, the value of a GATT characteristic is a value stored in the server. It only needs to change when the underlying data changes (e.g. a sensor va...