DAC_MCP492x.h File Reference

Containing the functions to control the MCP492x DACs. More...

#include "../Pins/Pins.h"
#include "../Configuration.h"

Go to the source code of this file.

Macros
#define	MCP492X_DACB   7
	Position of the DACA or DACB Select bit in the write command register.
#define	MCP492X_BUFFERED   6
	Position of the VREF Input Buffer Control bit in the write command register.
#define	MCP492X_GAIN_SELECT_SINGLE   5
	Position of the Output Gain Select bit in the write command register.
#define	MCP492X_SHDN   4
	Position of the Output Power Down Control bit in the write command register.
#define	SELECT_MCP4922   SPI_SELECT_DDS
	Select the MCP4922 DAC by pulling the DDS_CS pin low.
#define	DESELECT_MCP4922   SPI_DESELECT_DDS
	Deselect the MCP4922 DAC by pulling the DDS_CS pin high.
#define	SELECT_MCP4921   SPI_SELECT_PS
	Select the MCP4921 DAC by pulling the PS_CS pin low.
#define	DESELECT_MCP4921   SPI_DESELECT_PS
	Deselect the MCP4921 DAC by pulling the PS_CS pin high.

Functions
void	MCP4921_DAC_Set (uint16_t dac_data)
	Set the DAC data value of the MCP4921 device.
void	MCP4921_Voltage_Set (float voltage)
	Set the voltage of the MCP4921 device.
void	MCP4922_DAC_Set (uint16_t dac_data, char channel_A_B)
	Set the DAC data value of the MCP4922 device.
void	MCP4922_Voltage_Set (float voltage, char channel_A_B)
	Set the voltage of the MCP4922 device.

Detailed Description

Containing the functions to control the MCP492x DACs.

Date

31.08.2020 18:43:02

Author

Markus Scheich

Function Documentation

MCP4921_DAC_Set()

void MCP4921_DAC_Set

(

uint16_t

dac_data

)

Set the DAC data value of the MCP4921 device.

Parameters

dac_data

DAC data that is written to the write command registers. Only the lower 12 bits are used.

MCP4921_Voltage_Set()

void MCP4921_Voltage_Set

(

float

voltage

)

Set the voltage of the MCP4921 device.

The voltage is converted to the DAC data using the calibrated reference voltage of the device.

Parameters

voltage

Set the MCP4921 device to this voltage.

MCP4922_DAC_Set()

void MCP4922_DAC_Set	(	uint16_t	dac_data,
		char	channel_A_B )

Set the DAC data value of the MCP4922 device.

Parameters

dac_data	DAC data that is written to the write command registers. Only the lower 12 bits are used.
channel_A_B	Set this to 'B' to set the value of the second channel (B). All other characters set the value of the first channel (A).

MCP4922_Voltage_Set()

void MCP4922_Voltage_Set	(	float	voltage,
		char	channel_A_B )

Set the voltage of the MCP4922 device.

The voltage is converted to the DAC data using the calibrated reference voltage of the device.

Parameters

voltage	Set the MCP4922 device to this voltage.
channel_A_B	Set this to 'B' to set the value of the second channel (B). All other characters set the value of the first channel (A).