Hi, I was testing the existing ulp riscv interrupt sample for the esp32s2, i just added to it a led blink code to see a blink from ulp riscv before going to halt mode. it works 1 or 3 times ,then freezes.; here is the code (Board is esp32 s2 Mini ) ESP IDF rel 5.0 https://www.wemos.cc/en/latest/_sta...

No: - The sample depth is the I2S sample depth you specify when initializing the driver, most likely you use 16bit/sample. - You need to divide, so 6000 samples/s and 16 bit means 6000/16=375. here is a small test code , i think i2s driver is not reliable. Whit this code i can read 5.977 (less than...

Attenuation refers to the amount an voltage signal is scaled down before being input into the ADC. The ADC's can ideally only measure voltages between 0 to 1100mV. Therefore to measure voltages larger than 1100mV, an input voltage can be scaled down such that it is within the 0 to 1100mV range henc...

ESP_Sprite wrote:From my notes, the sample rate you have to set for ADC acquisition on the current esp-idf is (actual_sample_rate)/(bits_per_sample).

So you mean to read 6ksps from adc 12bit per sample, should i set i2c sampling frequency to the 12x6 = 72khz ?

i think first off all you need better documentation as like stm32 , Documents are really hard to understand even you dont have some basic specs like adc max sampling rate etc etc... My dream features ; - Good and reliable documentation,datasheet,reference etc.. - Boot from sdcard by hardware. - Adc ...

How to set adc sampling rate when we get data via I2S ? As we can see I2S uses WS signal to sample adc , so what is the relation with
i2s_config.sample_rate = 120KHz; and ws signal ? is I2S sampling rate frequency of WS signal or frequency of i2s clock signal ?

Hello, In adc.h file there is such notes ; The default ADC full-scale voltage is 1.1V. To read higher voltages (up to the pin maximum voltage, * usually 3.3V) requires setting >0dB signal attenuation for that ADC channel. * * When VDD_A is 3.3V: * * - 0dB attenuaton (ADC_ATTEN_DB_0) gives full-scale...

Hello ,
enum adc_i2s_source_t What is the meaning of I2S data from GPIO matrix signal ? in adc.h file ?
What is it for ? Which register's which bit is it?

So what is the result ? Did you tried suggestion ?

ESP_igrr wrote:To install Arduino for ESP32, follow these instructions: https://github.com/espressif/arduino-es ... manager.md

But this version does not allow to use i2s for adc ,doesnt it?