Configuration Structure for an ADC Channel. More...

Detailed Description

Configuration Structure for an ADC Channel.

This can be used to configure a a single input, or a multiplexed input, allowing up to 8 inputs on one channel.

Note: Sharing data lines to multiple muxes is possible, but each channel sharing data lines must be set to the maximum number of channels, even if some multiplexers have fewer inputs connected.

#include <adc.h>

Public Types
enum	MuxPin { MUX_SEL_0 , MUX_SEL_1 , MUX_SEL_2 , MUX_SEL_LAST }

enum	ConversionSpeed { SPEED_1CYCLES_5 , SPEED_2CYCLES_5 , SPEED_8CYCLES_5 , SPEED_16CYCLES_5 , SPEED_32CYCLES_5 , SPEED_64CYCLES_5 , SPEED_387CYCLES_5 , SPEED_810CYCLES_5 }
	per channel conversion speed added to fixed time based on bitdepth, etc. More...

Public Member Functions
void	InitSingle (Pin pin, ConversionSpeed speed=SPEED_8CYCLES_5)

void	InitMux (Pin adc_pin, size_t mux_channels, Pin mux_0, Pin mux_1=Pin(PORTX, 0), Pin mux_2=Pin(PORTX, 0), ConversionSpeed speed=SPEED_8CYCLES_5)

Public Attributes
GPIO	pin_

GPIO	mux_pin_ [MUX_SEL_LAST]

uint8_t	mux_channels_

ConversionSpeed	speed_

Member Enumeration Documentation

◆ ConversionSpeed

enum daisy::AdcChannelConfig::ConversionSpeed

per channel conversion speed added to fixed time based on bitdepth, etc.

Enumerator
SPEED_1CYCLES_5
SPEED_2CYCLES_5
SPEED_8CYCLES_5
SPEED_16CYCLES_5
SPEED_32CYCLES_5
SPEED_64CYCLES_5
SPEED_387CYCLES_5
SPEED_810CYCLES_5

◆ MuxPin

enum daisy::AdcChannelConfig::MuxPin

Which pin to use for multiplexing

Enumerator
MUX_SEL_0	&
MUX_SEL_1	&
MUX_SEL_2	&
MUX_SEL_LAST	&

Member Function Documentation

◆ InitMux()

void daisy::AdcChannelConfig::InitMux	(	Pin	adc_pin,
		size_t	mux_channels,
		Pin	mux_0,
		Pin	mux_1 = `Pin(PORTX, 0)`,
		Pin	mux_2 = `Pin(PORTX, 0)`,
		ConversionSpeed	speed = `SPEED_8CYCLES_5`
	)

Initializes a single ADC pin as a Multiplexed ADC. Requires a CD405X Multiplexer connected to the pin. You only need to supply the mux pins that are required, e.g. a 4052 mux would only require mux_0 and mux_1. Internal Callbacks handle the pin addressing.

Parameters

adc_pin	&
mux_channels	must be 1-8
mux_0	First mux pin
mux_1	Second mux pin
mux_2	Third mux pin
speed	conversion speed for this pin defaults to 8.5 cycles

◆ InitSingle()

void daisy::AdcChannelConfig::InitSingle	(	Pin	pin,
		ConversionSpeed	speed = `SPEED_8CYCLES_5`
	)

Initializes a single ADC pin as an ADC.

Parameters

pin	Pin to init.
speed	conversion speed for this pin defaults to 8.5 cycles

Member Data Documentation

◆ mux_channels_

uint8_t daisy::AdcChannelConfig::mux_channels_

&

◆ mux_pin_

GPIO daisy::AdcChannelConfig::mux_pin_[MUX_SEL_LAST]

&

◆ pin_

GPIO daisy::AdcChannelConfig::pin_

&

◆ speed_

ConversionSpeed daisy::AdcChannelConfig::speed_

The documentation for this struct was generated from the following file:

src/per/adc.h