How to pause ADC Continuous Mode reads ?

[nomaski]

Hi - I would like to pause ADC reads into DMA for 100 microseconds or so during an I2C peripheral read due I2C clock noise that's showing up on the ADC signal .. and then re-enable the reads after the I2C transfer is complete.

So I'm essentially looking to create adc_continuous_pause/resume() functions .. something like:

Code: Untitled.c Select all

esp_err_t adc_continuous_pause(adc_continuous_handle_t handle) {



    // Stop ADC hardware without deinitializing

    adc_hal_digi_stop(&handle->hal);



    // Disable ADC end of conversion interrupt

    adc_hal_digi_dis_intr(&handle->hal, ADC_HAL_DMA_INTR_MASK);



    return ESP_OK;

}

And then:

Code: Untitled.c Select all

esp_err_t adc_continuous_resume(adc_continuous_handle_t handle) {

    if (handle == NULL || handle->fsm != ADC_FSM_PAUSED) {  // Assuming FSM_PAUSED state is added

        return ESP_ERR_INVALID_STATE;

    }



    // Re-enable ADC end of conversion interrupt

    adc_hal_digi_en_intr(&handle->hal, ADC_HAL_DMA_INTR_MASK);



    // Start ADC hardware without reinitializing

    adc_hal_digi_start(&handle->hal);



    return ESP_OK;

}

Any thoughts/ideas suggestions on this approach??

thanks!