stm32f103驱动ad9833的代码
时间: 2023-07-31 11:05:23 浏览: 360
以下是通过STM32F103驱动AD9833的基本代码,主要是SPI通信部分的代码:
```c
#include "stm32f10x.h"
#define AD9833_CS_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_12)
#define AD9833_CS_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_12)
SPI_InitTypeDef SPI_InitStructure;
void AD9833_Init()
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
// AD9833 CS引脚初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// SPI1初始化
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
}
void AD9833_Write(unsigned short value)
{
AD9833_CS_LOW();
// 写入控制字节
SPI1->DR = (value >> 8) | 0x40;
while ((SPI1->SR & SPI_I2S_FLAG_TXE) == 0);
while ((SPI1->SR & SPI_I2S_FLAG_RXNE) == 0);
while ((SPI1->SR & SPI_I2S_FLAG_BSY) != 0);
// 写入数据字节
SPI1->DR = value & 0xFF;
while ((SPI1->SR & SPI_I2S_FLAG_TXE) == 0);
while ((SPI1->SR & SPI_I2S_FLAG_RXNE) == 0);
while ((SPI1->SR & SPI_I2S_FLAG_BSY) != 0);
AD9833_CS_HIGH();
}
```
以上代码中,AD9833_Init()函数用于初始化AD9833模块,包括CS引脚和SPI接口的初始化;AD9833_Write()函数用于向AD9833模块写入控制字节和数据字节,其中包括了SPI数据传输的相关代码。
需要注意的是,AD9833模块的控制字节和数据字节的格式和时序比较严格,需要根据AD9833的数据手册进行正确的配置。同时,在代码中需要保证SPI传输的正确性,以避免数据传输错误。
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