unfortunately not. I did a kludgy solution whereby I communicate to the second core via a global shared volatile variable that it should temporarily turn on interrupts. I then do the NVS operations and tell the other core that it can turn interrupts off again. I would prefer a cleaner solution but d...

setting apll = true yields the following output: I (271) I2S: APLL: Req RATE: 44100, real rate: 22049.982, BITS: 16, CLKM: 1, BCK_M: 8, MCLK: 5644795.500, SCLK: 705599.437500, diva: 1, divb: 0 So, the frequency is halved now. I should note that I am using the FABGL VGA library that uses I2S1 for gen...

that is a fair point. The only struct member of i2s_config_t I am not initializing is fixed_mclk and I believe that member is only used for apll = true. But to be certain, I have changed my code to use the same initializer as in the official example implementation. Unfortunately the results are the ...

thanks for your response. In my example i2s_config_t is stack allocated. I follow this example: https://github.com/espressif/esp-idf/blob/master/examples/peripherals/i2s_adc_dac/main/app_main.c The log message that shows requested vs real sample rate comes with the call to i2s_driver_install() so i2...

I am initializing I2S using ESP-IDF 3.2.2 as follows: i2s_config.mode = (i2s_mode_t) (I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_ADC_BUILT_IN); i2s_config.sample_rate = 44100; i2s_config.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT; i2s_config.communication_format = I2S_COMM_FORMAT_I2S_MSB; i2s_config....

Hi, I can successfully do source code level debugging using Visual Studio Code with PIO on a ESP-WROVER-KIT v4.1. However, when I single step into some SDK functions (e.g., i2s_install_driver) it only shows me the disassembled version of the function. Is it possible to attach a source path so to do ...

Thanks for your response. Just to clarify on the pull-ups: the built-in pull-ups that get enabled with sda_pullup_en and scl_pullup_en of i2c_config_t are sufficient, correct?

AP

Hi, I want to use the MCP23017 port expander for a project. The logic I'm driving with the MCP23017 is on 5V so I want to use 5V to power the MCP23017. My question is: since SDA and SDC are open drain connections on the I2C bus, is it OK to use the ESP to drive the MCP23017? The ESP has internal pul...

Hi, I'd like to try this example here: https://github.com/espressif/esp-idf/tree/master/examples/peripherals/i2s_adc_dac The README simply says to which GPIO pins to connect the speakers and microphone. Anyone out there who can point me to a specific schematic on how to build the required circuit? I...

Not sure I understand what you are saying. Did you disable the watchdog timer on core 1? With that I can keep interrupts on core 1 turned off indefinitely as long as core 0 is not using the NVS. What I was proposing with the volatile global variable is just a simple signaling mechanism where I can t...