AD56x6 Class Reference

Parent class containing methods common to AD5666, AD5676, and AD5686 DAC chips. More...

#include <ad56x6.h>

Inheritance diagram for AD56x6:

Collaboration diagram for AD56x6:

Public Member Functions
	AD56x6 (NanoPi &np, int cs)
	Constructor.
unsigned char *	AssembleWord (uint8_t cmd, uint8_t chan, uint16_t *data=NULL)
	Assembles the SPI word from command, channel, and data.
bool	Set (unsigned short chan, uint16_t setting, bool confirm=true)
	Sets the selected DAC channel to a value, confirms with readback.
virtual uint16_t	GetSetting (double v, unsigned short chan=0)=0
	Translates analog voltage to DAC setting, requires calibration.
virtual double	GetVoltage (uint16_t s, unsigned short chan=0)=0
	Translates DAC setting to analog voltage, requires calibration.
bool	RampVoltage (unsigned short chan, uint16_t vset=-1, unsigned int steps=16, unsigned int tdelay=500)
	Test method to ramp through voltage settings.
void	PowerOn ()
	Send POWER_UP command to DAC.
uint16_t	GetData ()
	Extract 16 bit setting from readback word.
void	Readback (short ch=-1)
	Read back DAC settings and write them to vector readback.

Public Attributes
const uint16_t	vfull = 0xffff
	Full scale output.
const uint8_t	nbytes = 3
	Size of data word in bytes.
std::vector< uint16_t >	readback
	Read back DAC settings after Readback() was called.

Protected Member Functions
virtual uint8_t	EncChan (uint8_t chan)
	Format channel number for use in SPI word (3-bit number)

Protected Attributes
uint32_t	bits = 0
NanoPi *	nanoPi = NULL
const int	cselect
bool	verbose = false

Detailed Description

Parent class containing methods common to AD5666, AD5676, and AD5686 DAC chips.

This contains everything needed for the SPI communication with an AD56x6 DAC chip, except for those parts that differ between chips.

Constructor & Destructor Documentation

AD56x6()

AD56x6::AD56x6 ( NanoPi & np, int cs )

inline

Constructor.

Parameters

np	An instance of a NanoPi object, needed for the actual hardware communication
cs	SPI channel select addressing the chip in question

Member Function Documentation

GetSetting()

virtual uint16_t AD56x6::GetSetting ( double v, unsigned short chan = 0 )

pure virtual

Translates analog voltage to DAC setting, requires calibration.

Implemented in AD5676, and AD5686R.

GetVoltage()

virtual double AD56x6::GetVoltage ( uint16_t s, unsigned short chan = 0 )

pure virtual

Translates DAC setting to analog voltage, requires calibration.

Implemented in AD5676, and AD5686R.

RampVoltage()

bool AD56x6::RampVoltage	(	unsigned short	chan,
		uint16_t	vset = -1,
		unsigned int	steps = 16,
		unsigned int	tdelay = 500 )

Test method to ramp through voltage settings.

Only used for functionality tests, not that useful for general use.

Parameters

chan	channel number
vset	maximum setting, use -1 to go to full scale
steps	number of steps between 0 and vset
tdelay	milliseconds to wait between steps

Readback()

void AD56x6::Readback

(

short

ch = -1

)

Read back DAC settings and write them to vector readback.

Parameters

ch	channel to read back, -1 reads all channels

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The documentation for this class was generated from the following files:

• include/ad56x6.h
• src/ad56x6.cc