ADC (adc)

Analog-to-digital converter.

Device Type

DEVICE_TYPE_ADC

Structure

struct adc_t {
    char * name;
    int vreference;
    int resolution;
    int nchannel;
    int (*read)(struct adc_t * adc, int channel);
    void * priv;
};

Key API

Function	Description
search_adc(name)	Find an ADC device by name
register_adc(adc, drv)	Register an ADC device
unregister_adc(adc)	Unregister an ADC device
adc_read_raw(adc, channel)	Read raw value
adc_read_voltage(adc, channel)	Read voltage value (millivolts)

Description

The ADC driver provides an interface for reading analog voltage values from hardware channels. Each ADC includes reference voltage, resolution, and channel count. adc_read_voltage() internally converts the raw value to millivolts.