基于STM32F429的AD9833-DDS程序
- AD9833芯片手册
- stm32f429代码
- SPI程序
- AD9833驱动程序
- 结语
AD9833芯片手册
链接: ad9833_亚德诺半导体网站.（链接中有官方驱动代码）
控制方式：SPI
stm32f429代码
SPI程序
SPI_HandleTypeDef SPI5_Handler; // SPI句柄
/*spi5读写函数*/
u8 SPI5_ReadWriteByte(u8 dat)
{
u8 Rxdata;
HAL_SPI_TransmitReceive(&SPI5_Handler, &dat, &Rxdata, 1, 1000);
return Rxdata; // 返回收到的数据
}
void SPI5_Init(void)
{
SPI5_Handler.Instance = SPI5; // SP5
SPI5_Handler.Init.Mode = SPI_MODE_MASTER; // 设置SPI工作模式，设置为主模式
SPI5_Handler.Init.Direction = SPI_DIRECTION_2LINES; // 设置SPI单向或者双向的数据模式:SPI设置为双线模式
SPI5_Handler.Init.DataSize = SPI_DATASIZE_8BIT; // 设置SPI的数据大小:SPI发送接收8位帧结构
SPI5_Handler.Init.CLKPolarity = SPI_POLARITY_HIGH; // 串行同步时钟的空闲状态为高电平
SPI5_Handler.Init.CLKPhase = SPI_PHASE_1EDGE; // 串行同步时钟的第1个跳变沿（上升或下降）数据被采样
SPI5_Handler.Init.NSS = SPI_NSS_SOFT; // NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制
SPI5_Handler.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128; // 定义波特率预分频的值:波特率预分频值为256
SPI5_Handler.Init.FirstBit = SPI_FIRSTBIT_MSB; // 指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
SPI5_Handler.Init.CRCPolynomial = 7; // CRC值计算的多项式
HAL_SPI_Init(&SPI5_Handler); // 初始化
__HAL_SPI_ENABLE(&SPI5_Handler); // 使能SPI5
SPI5_ReadWriteByte(0xff);
}
//-----------------------------------------------------------------
//
// 函数功能: SPI5底层驱动，时钟使能，引脚配置
// 入口参数: SPI_HandleTypeDef *hspi：SPI句柄
// 返 回 值: 无
// 注意事项: 此函数会被HAL_SPI_Init()调用
//
//-----------------------------------------------------------------
void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi)
{
GPIO_InitTypeDef GPIO_Initure;
__HAL_RCC_GPIOF_CLK_ENABLE(); // 使能GPIOF时钟
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_SPI5_CLK_ENABLE(); // 使能SPI5时钟
// PF7->SCLK, PF8->MISO, PF9->MOSI
GPIO_Initure.Pin = GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9;
GPIO_Initure.Mode = GPIO_MODE_AF_PP; // 复用推挽输出
GPIO_Initure.Pull = GPIO_PULLUP; // 上拉
GPIO_Initure.Speed = GPIO_SPEED_HIGH; // 高速
GPIO_Initure.Alternate = GPIO_AF5_SPI5; // 复用为SPI5
HAL_GPIO_Init(GPIOF, &GPIO_Initure); // 初始化
GPIO_Initure.Pin = GPIO_PIN_15; //SPI_NSS
GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP; //推挽输出
GPIO_Initure.Pull = GPIO_PULLUP; // 上拉
GPIO_Initure.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_Initure);
}
//-----------------------------------------------------------------
// void SPI5_SetSpeed(u8 SPI_BaudRatePrescaler)
//-----------------------------------------------------------------
//
// 函数功能: SPI速度设置函数
// 入口参数: u8 SPI_BaudRatePrescaler：SPI_BAUDRATEPRESCALER_2~SPI_BAUDRATEPRESCALER_2 256
// 返 回 值: 无
// 注意事项: SPI速度=fAPB1/分频系数，fAPB1时钟一般为45Mhz
//
//-----------------------------------------------------------------
void SPI5_SetSpeed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler)); // 判断有效性
__HAL_SPI_DISABLE(&SPI5_Handler); // 关闭SPI
SPI5_Handler.Instance->CR1 &= 0XFFC7; // 位3-5清零，用来设置波特率
SPI5_Handler.Instance->CR1 |= SPI_BaudRatePrescaler; // 设置SPI速度
__HAL_SPI_ENABLE(&SPI5_Handler); // 使能SPI
}
说明：
PF7->SCLK，PF8->MISO，PF9->MOSI，PB15->SPI_NSS。
MISO是主机输入从机输出（AD9833没有用到），MOSI是主机输出从机输入（AD9833的data口）
AD9833驱动程序
ad9833头文件
#ifndef _AD9833_H_
#define _AD9833_H_
/******************************************************************************/
/* Include Files */
/******************************************************************************/
#include "" //公共头文件
#define AD9833_FSYNC PBout(15)//这个是NSS管脚
/******************************************************************************/
/* AD9833 */
/******************************************************************************/
/* Registers */
#define AD9833_REG_CMD (0 << 14)
#define AD9833_REG_FREQ0 (1 << 14)
#define AD9833_REG_FREQ1 (2 << 14)
#define AD9833_REG_PHASE0 (6 << 13)
#define AD9833_REG_PHASE1 (7 << 13)
/* Command Control Bits */
#define AD9833_B28 (1 << 13)
#define AD9833_HLB (1 << 12)
#define AD9833_FSEL0 (0 << 11)
#define AD9833_FSEL1 (1 << 11)
#define AD9833_PSEL0 (0 << 10)
#define AD9833_PSEL1 (1 << 10)
#define AD9833_PIN_SW (1 << 9)
#define AD9833_RESET (1 << 8)
#define AD9833_SLEEP1 (1 << 7)
#define AD9833_SLEEP12 (1 << 6)
#define AD9833_OPBITEN (1 << 5)
#define AD9833_SIGN_PIB (1 << 4)
#define AD9833_DIV2 (1 << 3)
#define AD9833_MODE (1 << 1)
#define AD9833_OUT_SINUS ((0 << 5) | (0 << 1) | (0 << 3))
#define AD9833_OUT_TRIANGLE ((0 << 5) | (1 << 1) | (0 << 3))
#define AD9833_OUT_MSB ((1 << 5) | (0 << 1) | (1 << 3))
#define AD9833_OUT_MSB2 ((1 << 5) | (0 << 1) | (0 << 3))
/******************************************************************************/
/* Functions Prototypes */
/******************************************************************************/
/* Initializes the SPI communication peripheral and resets the part. */
unsigned char AD9833_Init(void);
/* Sets the Reset bit of the AD9833. */
void AD9833_Reset(void);
/* Clears the Reset bit of the AD9833. */
void AD9833_ClearReset(void);
/* Writes the value to a register. */
void AD9833_SetRegisterValue(u16 regValue);
/* Writes to the frequency registers. */
void AD9833_SetFrequency(u16 reg,float fout);
/* Writes to the phase registers. */
void AD9833_SetPhase(unsigned short reg, unsigned short val);
/* Selects the Frequency,Phase and Waveform type. */
void AD9833_Setup(unsigned short freq,unsigned short phase,unsigned short type);
void AD9833_SetFrequencyQuick(float fout,unsigned short type);
unsigned char AD9833_SPI_Write(unsigned char* data,unsigned char bytesNumber);
#endif
AD9833驱动代码
#include ""
#include ""
#include ""
#define FCLK 25000000 //设置晶振频率
#define RealFreDat (268435456.0/FCLK) //F=FCLK/2^28;
/********往ad9833写******************************/
unsigned char AD9833_SPI_Write(unsigned char* data,unsigned char bytesNumber)
{
unsigned char i =0;
unsigned char writeData[5] = {0,0, 0, 0, 0};
AD9833_FSYNC =0;
for(i = 0;i < bytesNumber;i ++)
{
writeData[i] = data[i + 1];
}
for(i=0 ;i<bytesNumber ;i++)
{
SPI5_ReadWriteByte(writeData[i]);
}
AD9833_FSYNC = 1;
delay_us(5);
return i;
}
//-----------------------------------------------------
// void AD9833_SetRegisterValue(unsigned short regValue)
// 寄存器写入函数
// regValue：16位数据
//-----------------------------------------------------
void AD9833_SetRegisterValue(unsigned short regValue)
{
unsigned char data[5] = {0x03, 0x00, 0x00};
data[1] = (unsigned char)((regValue & 0xFF00) >> 8);
data[2] = (unsigned char)((regValue & 0x00FF) >> 0);
AD9833_SPI_Write(data,2);
}
//-----------------------------------------------------
// void AD9833_SetFrequency(unsigned short reg, float fout)
// 频率寄存器写入函数
// reg：寄存器选项
// fout：频率
//-----------------------------------------------------
void AD9833_SetFrequency(unsigned short reg, float fout)
{
unsigned short freqHi = reg;
unsigned short freqLo = reg;
unsigned long val=RealFreDat*fout;//F寄存器的值
freqHi |= (val & 0xFFFC000) >> 14 ;
freqLo |= (val & 0x3FFF);
AD9833_SetRegisterValue(AD9833_B28);
AD9833_SetRegisterValue(freqLo);
AD9833_SetRegisterValue(freqHi);
}
//-----------------------------------------------------
// void AD9833_SetFrequency(unsigned short reg, float fout)
// 相位寄存器写入函数
// reg：寄存器选项
// val：16位的相位数据，P=2π/2^16*val
//-----------------------------------------------------
void AD9833_SetPhase(unsigned short reg, unsigned short val)
{
unsigned short phase = reg;
phase |= val;
AD9833_SetRegisterValue(phase);
}
//-----------------------------------------------------
// void AD9833_SetFrequencyQuick(float fout,unsigned short type)
// 应用函数
// fout：频率
// type：输出模式选项
//-----------------------------------------------------
void AD9833_SetFrequencyQuick(float fout,unsigned short type)
{
AD9833_SetFrequency(AD9833_REG_FREQ0, fout);
AD9833_Setup(AD9833_FSEL0, AD9833_PSEL0, type);
}
unsigned char AD9833_Init(void)
{
SPI5_Init();
AD9833_SetRegisterValue(AD9833_REG_CMD | AD9833_RESET);
return (1);
}
//-----------------------------------------------------
// void AD9833_Setup(unsigned short freq,unsigned short phase,unsigned short type)
// 功能函数
// freq：输出所需频率寄存器
// phase：输出所需相位寄存器
// type：输出模式
//-----------------------------------------------------
void AD9833_Setup(unsigned short freq,unsigned short phase,unsigned short type)
{
unsigned short val = 0;
val = freq | phase | type;
AD9833_SetRegisterValue(val);
}
说明：
宏定义的FCLK是AD9833模块上所提共的频率（一般是模块上晶振的频率），读者应该根据自己所用的模块进行修改。
#include ""
AD9833_Init();
AD9833_SetFrequencyQuick(500000,AD9833_OUT_SINUS);//频率，波形
结语
参考文章：
链接: /weixin_43141547/article/details/106452650.