Component: DDS DAC (AD9834/AD9833) (AD9834/AD9833) (Analog Output): Difference between revisions

Latest revision as of 14:37, 13 July 2026

Author	Matrix TSL
Version	1.0
Category	Analog Output

DDS DAC (AD9834/AD9833) component

Component to drive AD9834 and AD9833 Direct Digital Synthesis (DDS) waveform generator ICs via SPI interface. These devices can generate sine, triangle, and square wave outputs with programmable frequency and phase. Compatible with AD9833 and AD9834 devices.

Detailed description

No detailed description exists yet for this component

Examples

Auto Detect Port Number

This example auto detects and opens a COM Port based on preassigned USB Identifiers VID/PID.

For a known device the VID and PID can be found via Windows device manager.

Auto Detect Example

Macro reference

DisableOutput

	DisableOutput
Disables the DDS output (puts device in sleep mode).
- VOID	Return

EnableOutput

	EnableOutput
Enables the DDS output.
- VOID	Return

Initialise

	Initialise
Initializes the SPI bus and resets the DDS device. Call this once at startup.
- VOID	Return

Reset

	Reset
Resets the DDS device. This clears all registers and stops output.
- VOID	Return

SetFrequency

	SetFrequency
Sets the output frequency in Hz. Frequency range depends on clock frequency (typically 0 Hz to ClockFreq/2).
- ULONG	Frequency
Frequency in Hz
- BYTE	Register
Frequency register to use: 0 or 1
- VOID	Return

SetPhase

	SetPhase
Sets the phase offset. Phase value range: 0-4095 (0 to 360 degrees).
- UINT	Phase
Phase value: 0-4095 (0 to 360 degrees)
- BYTE	Register
Phase register to use: 0 or 1
- VOID	Return

SetWaveform

	SetWaveform
Sets the output waveform type: 0=Sine, 1=Triangle, 2=Square
- BYTE	WaveformType
Waveform type: 0=Sine, 1=Triangle, 2=Square
- VOID	Return

Property reference

	Properties
	Device Type
Selects which DDS device is connected.
	Clock Frequency
External clock frequency in Hz. Typical values: 25000000 (25 MHz) for AD9833, 75000000 (75 MHz) for AD9834.
	SPI Connections
	Channel
SPI Channel selector
	Prescale
Prescale option selector
	MOSI
SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode.
	MOSI Remap Pin
Select which the target pin to assign the MOSI hardware pin functionality.
	MISO
SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode.
	MISO Remap Pin
Select which the target pin to assign the MISO hardware pin functionality.
	CLK
SPI Clock Pin CLK - The Clock signal is driven by the SPI master.
	CLK Remap Pin
Select which the target pin to assign the CLK hardware pin functionality.
	CS / SS
Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device.
	Simulation
	Simulate Comms

Component Source Code

Please click here to download the component source project: FC_Comp_Source_DAC_AD9834_AD9833.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_DAC_AD9834_AD9833.fcfx

@@ Line 241: / Line 241: @@
 | colspan="2" | External clock frequency in Hz. Typical values: 25000000 (25 MHz) for AD9833, 75000000 (75 MHz) for AD9834.&nbsp;
 |-
-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
 | width="90%" class="mtx-class-propfolder" | SPI Connections
 |-
@@ Line 290: / Line 290: @@
 | colspan="2" | Chip Select / Slave Select Pin  Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device. &nbsp;
 |-
-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
 | width="90%" class="mtx-class-propfolder" | Simulation
 |-

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