stm32f427控制AD9833代码

以下是基于STM32F427控制AD9833的代码示例，需要注意的是，该代码仅供参考，需要根据具体的硬件电路以及使用的开发环境进行修改和适配。

#include "stm32f4xx_hal.h"

#define AD9833_CS_Pin GPIO_PIN_3
#define AD9833_CS_GPIO_Port GPIOD
#define AD9833_RST_Pin GPIO_PIN_4
#define AD9833_RST_GPIO_Port GPIOD
#define AD9833_FSYNC_Pin GPIO_PIN_7
#define AD9833_FSYNC_GPIO_Port GPIOD

void AD9833_Write(uint8_t byte);

void AD9833_Init(void)
{
    HAL_GPIO_WritePin(AD9833_CS_GPIO_Port, AD9833_CS_Pin, GPIO_PIN_SET);
    HAL_GPIO_WritePin(AD9833_RST_GPIO_Port, AD9833_RST_Pin, GPIO_PIN_RESET);
    HAL_Delay(10);
    HAL_GPIO_WritePin(AD9833_RST_GPIO_Port, AD9833_RST_Pin, GPIO_PIN_SET);
    HAL_Delay(10);
    AD9833_Write(0x21); // select frequency register 0
    AD9833_Write(0x00); // set lower 8 bits of frequency to 0
    AD9833_Write(0x00); // set upper 8 bits of frequency to 0
    AD9833_Write(0x70); // set frequency control word
    AD9833_Write(0x00); // set phase to 0
    AD9833_Write(0x00); // set phase to 0
    AD9833_Write(0xC0); // set control register
}

void AD9833_SetFrequency(double frequency)
{
    uint32_t freq_word = (uint32_t)(frequency * 10.73741824);
    uint16_t freq_word_low = (uint16_t)(freq_word & 0x3FFF);
    uint16_t freq_word_high = (uint16_t)((freq_word >> 14) & 0x3FFF);
    AD9833_Write(0x40); // select frequency register 0
    AD9833_Write(freq_word_low & 0xFF); // set lower 8 bits of frequency
    AD9833_Write((freq_word_low >> 8) & 0xFF); // set upper 8 bits of frequency
    AD9833_Write(freq_word_high & 0xFF); // set lower 8 bits of frequency
    AD9833_Write((freq_word_high >> 8) & 0xFF); // set upper 8 bits of frequency
}

void AD9833_SetPhase(double phase)
{
    uint16_t phase_word = (uint16_t)(phase * 40.96);
    AD9833_Write(0xC0); // select control register
    AD9833_Write(phase_word & 0xFF); // set lower 8 bits of phase
    AD9833_Write((phase_word >> 8) & 0xFF); // set upper 8 bits of phase
}

void AD9833_Write(uint8_t byte)
{
    HAL_GPIO_WritePin(AD9833_CS_GPIO_Port, AD9833_CS_Pin, GPIO_PIN_RESET);
    HAL_SPI_Transmit(&hspi3, &byte, 1, 1000);
    HAL_GPIO_WritePin(AD9833_CS_GPIO_Port, AD9833_CS_Pin, GPIO_PIN_SET);
}

void AD9833_SetWaveform(uint8_t waveform)
{
    uint8_t control_word = 0xC0;
    switch (waveform)
    {
        case 0: // sine wave
            control_word = 0xC0;
            break;
        case 1: // square wave
            control_word = 0xE0;
            break;
        case 2: // triangle wave
            control_word = 0xA0;
            break;
    }
    AD9833_Write(control_word);
}

void AD9833_EnableOutput(uint8_t enable)
{
    uint8_t control_word = 0x00;
    if (enable)
    {
        control_word = 0x20;
    }
    AD9833_Write(control_word);
}

void AD9833_SetFrequencyAndPhase(double frequency, double phase)
{
    uint32_t freq_word = (uint32_t)(frequency * 10.73741824);
    uint16_t freq_word_low = (uint16_t)(freq_word & 0x3FFF);
    uint16_t freq_word_high = (uint16_t)((freq_word >> 14) & 0x3FFF);
    uint16_t phase_word = (uint16_t)(phase * 40.96);
    AD9833_Write(0x40); // select frequency register 0
    AD9833_Write(freq_word_low & 0xFF); // set lower 8 bits of frequency
    AD9833_Write((freq_word_low >> 8) & 0xFF); // set upper 8 bits of frequency
    AD9833_Write(freq_word_high & 0xFF); // set lower 8 bits of frequency
    AD9833_Write((freq_word_high >> 8) & 0xFF); // set upper 8 bits of frequency
    AD9833_Write(0xC0); // select control register
    AD9833_Write(phase_word & 0xFF); // set lower 8 bits of phase
    AD9833_Write((phase_word >> 8) & 0xFF); // set upper 8 bits of phase
}

在代码中，AD9833_Init()函数用于初始化AD9833芯片，AD9833_SetFrequency()函数用于设置输出频率，AD9833_SetPhase()函数用于设置输出相位，AD9833_Write()函数用于向AD9833芯片发送数据，AD9833_SetWaveform()函数用于设置输出波形，AD9833_EnableOutput()函数用于开启或关闭输出，AD9833_SetFrequencyAndPhase()函数用于设置输出频率和相位。

在使用该代码时，需要根据具体的硬件电路连接情况修改GPIO口的定义以及SPI总线的初始化和配置，另外AD9833芯片的具体特性和寄存器配置也需要根据数据手册进行相应的修改。