AD9833-AD9834-STM32-HAL

AD983x DDS Library for STM32 (HAL)

UPDATED - 2026

A lightweight STM32 HAL driver for the Analog Devices AD9833 and AD9834 Direct Digital Synthesis (DDS) waveform generators.

This library allows an STM32 microcontroller to configure and control the DDS chip over SPI. Both hardware SPI and software (bit-banged) SPI are supported. The driver provides control over waveform generation, output frequency, phase settings, and power/sleep modes.

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Supported Devices

Microcontrollers

• STM32 microcontrollers using the STM32 HAL library

DDS Devices

• Analog Devices AD9833
• Analog Devices AD9834

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Features

• Supports AD9833 and AD9834
• Compatible with STM32 HAL
• Hardware SPI or software SPI
• Frequency control using the 28-bit tuning word
• Phase control using the 12-bit phase register
• Frequency register switching for FSK-style operation
• Sine, triangle, and square waveform generation
• Separate digital output control for AD9834 SIGN BIT OUT
• Sleep and DAC power-down modes

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Supported Waveforms

Waveform	AD9833	AD9834
Sine	Yes	Yes
Triangle	Yes	Yes
Square	Yes	Yes

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Example Usage

Create and configure the device handle

static AD983x_Handle_t ad9833_dds = {
    .gpioPort                     = GPIOA,                     /* GPIO port used for DDS control pins              */
    .serialDataGpioPin            = GPIO_PIN_7,                /* SDATA: serial data line to the DDS               */
    .serialClockGpioPin           = GPIO_PIN_5,                /* SCLK: serial clock for shifting data             */
    .frameSyncGpioPin             = GPIO_PIN_0,                /* FSYNC: frame sync / chip select for DDS          */
    .spiHandle                    = &hspi1,                    /* Hardware SPI handle (NULL for software SPI)      */
    .masterClockFrequencyHz       = 25000000u,                 /* 25 MHz MCLK input provided to AD9833             */
    .currentWaveformType          = AD983X_WAVE_SINE,          /* Default waveform output (sine wave)              */
    .activeFrequencyRegister      = AD983X_REG_0,              /* Currently selected frequency register (FREQ0)    */
    .activePhaseRegister          = AD983X_REG_0,              /* Currently selected phase register (PHASE0)       */
    .sleep1BitState               = AD983X_SLEEP_DISABLED,     /* DAC sleep control bit state                      */
    .sleep12BitState              = AD983X_SLEEP_DISABLED,     /* Master clock / internal sleep control            */
    .deviceType                   = AD983X_DEVICE_AD9833,      /* Specifies the DDS device type                    */
    .frequencyHz                  = { 0u, 0u },                /* Stored frequencies for FREQ0 and FREQ1 registers */
    .phaseDeg                     = { 0u, 0u },                /* Stored phases for PHASE0 and PHASE1 registers    */
};

Initialization

AD983x_Init(&dds, AD983X_WAVE_SINE, 1000, 0);

Change frequency

AD983x_SetFrequencyHz(&dds, AD983X_REG_0, 10000);

Change waveform

AD983x_SetWaveform(&dds, AD983X_WAVE_TRIANGLE);

Enable digital square output on AD9834

AD9834_SetSquareWaveMode(&dds, AD9834_SQUARE_MSB);

Power Modes

AD983x_Wake(&dds);
AD983x_Sleep(&dds);
AD983x_DeepSleep(&dds);
AD983x_DacOff(&dds);

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Hardware Requirements

• Stable MCLK source
• SPI connection
• Proper analog output filtering
• Correct reference resistor network

Refer to the official Analog Devices datasheets for recommended hardware connections.

Examples

Complete example projects are provided in the examples folder. The examples are configured for STM32CubeIDE and target the STM32G431KBT6 microcontroller

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Datasheets

Analog Devices AD9833 Datasheet

Analog Devices AD9834 Datasheet

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License

MIT License