adc_hal_dma_ctx_t struct

Initialize the HW

Initialize the hal context

Setting the digital controller.

Link DMA descriptor

Get the ADC reading result

For esp32s2 and later chips - Set ADC digital controller clock division factor. The clock is divided from `APLL` or `APB` clock. Expression: controller_clk = APLL/APB * (div_num + div_a / div_b + 1). - Enable clock and select clock source for ADC digital controller. For esp32, use I2S clock