Chapter 2. API Reference
uint32_t adc1_chan_mask
Channel list of ADC1 to be initialized.
uint32_t adc2_chan_mask
Channel list of ADC2 to be initialized.
struct adc_digi_configuration_t
ADC digital controller settings.
Public Members
bool conv_limit_en
To limit ADC conversion times. Conversion stops after finishing conv_limit_num times conversion.
uint32_t conv_limit_num
Set the upper limit of the number of ADC conversion triggers. Range: 1 ~ 255.
uint32_t pattern_num
Number of ADC channels that will be used.
adc_digi_pattern_config_t *adc_pattern
List of configs for each ADC channel that will be used.
uint32_t sample_freq_hz
The expected ADC sampling frequency in Hz. Range: 611Hz ~ 83333Hz Fs = Fd / interval / 2 Fs:
sampling frequency; Fd: digital controller frequency, no larger than 5M for better performance interval:
interval between 2 measurement trigger signal, the smallest interval should not be smaller than the ADC
measurement period, the largest interval should not be larger than 4095
adc_digi_convert_mode_t conv_mode
ADC DMA conversion mode, see adc_digi_convert_mode_t.
adc_digi_output_format_t format
ADC DMA conversion output format, see adc_digi_output_format_t.
Macros
ADC_ATTEN_0db
ADC rtc controller attenuation option.
Note This definitions are only for being back-compatible
ADC_ATTEN_2_5db
ADC_ATTEN_6db
ADC_ATTEN_11db
ADC_WIDTH_BIT_DEFAULT
The default (max) bit width of the ADC of current version. You can also get the maximum bitwidth by
SOC_ADC_MAX_BITWIDTH defined in soc_caps.h.
ADC_WIDTH_9Bit
ADC_WIDTH_10Bit
ADC_WIDTH_11Bit
ADC_WIDTH_12Bit
ADC_MAX_DELAY
Digital ADC DMA read max timeout value, it may make the adc_digi_read_bytes block forever if the
OS supports.
Type Definitions
typedef struct adc_digi_init_config_s adc_digi_init_config_t
ADC DMA driver configuration.
Espressif Systems 224
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