Search found 6 matches

by Jara777
Thu Apr 08, 2021 8:39 am
Forum: General Discussion
Topic: The future of ESP32 hardware revision(fixing annoying hardware issues?)
Replies: 7
Views: 507

Re: The future of ESP32 hardware revision(fixing annoying hardware issues?)

Quite agree with the issue on ADC, I have almost done the project but the ADC reading resolution cannot be ignored. I am about to investigate on esp32-s2 board, anyone who has the development experience know if the ADC is improved or having the same problem?
by Jara777
Thu Apr 08, 2021 3:45 am
Forum: General Discussion
Topic: Does ESP32-S2 support i2s built-in ADC?
Replies: 3
Views: 164

Re: Does ESP32-S2 support i2s built-in ADC?

On the -S2, the ADC doesn't use I2S for DMA anymore, it can do DMA by itself. Unfortunately, we don't really have a nice example to show that off, but you may be able to get some hints from the driver test code in esp-idf at components/driver/test/adc_dma_test . And, will you provide the relevant e...
by Jara777
Thu Apr 08, 2021 3:37 am
Forum: General Discussion
Topic: Does ESP32-S2 support i2s built-in ADC?
Replies: 3
Views: 164

Re: Does ESP32-S2 support i2s built-in ADC?

Thank you for the reply! So that means it can achieve high ADC sampling rate (e.g. 100kHz) without i2s, right?
by Jara777
Wed Apr 07, 2021 8:05 am
Forum: General Discussion
Topic: Does ESP32-S2 support i2s built-in ADC?
Replies: 3
Views: 164

Does ESP32-S2 support i2s built-in ADC?

Hi I have bought ESP32-S2 board and tried its i2s built-in ADC. But it did not work. The error showed "I2S_MODE_ADC_BUILT_IN' was not declared in this scope". So if someone knows that whether ESP32-S2 support i2s built-in ADC? Thanks a lot!
by Jara777
Fri Jan 08, 2021 9:53 am
Forum: General Discussion
Topic: How to use SPI of esp32 to read ADC samples periodically with fixed sample rate?
Replies: 5
Views: 2357

Re: How to use SPI of esp32 to read ADC samples periodically with fixed sample rate?

Hi, I am also working on ADS8864 and ESP32 recently, but I found it difficult to find the Arduino Library for ADS8864. Would you mind giving me some information on the library?
by Jara777
Sun Nov 29, 2020 11:04 am
Forum: General Discussion
Topic: Lack of values using I2S_ADC
Replies: 0
Views: 276

Lack of values using I2S_ADC

Hi all, I have encountered a problem when I use the i2s_ADC mode with high sampling rate (about 60kHz). The board I used is ESP32-DevKitC V4. The problem is that some values may cannot be read by ADC in this mode. There are obvious blank gaps of the measurement signal which should be varied uniforml...

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