基于STM32的 AD9834 驱动程序

//================AD9834.h======================// /*----------------------------------------------------- AD9834驱动程序

STM32固件函数库V2.0 2011.3.29

-------------------------------------------------------*/ #ifndef __AD9834_H #define __AD9834_H #include \#define Triangle_Wave 0x2002 #define Sine_Wave 0x2028

/* AD9834晶振频率 */

#define AD9834_SYSTEM_COLCK 50000000UL /* AD9834 控制引脚 */

#define AD9834_Control_Port GPIOC

#define AD9834_FSYNC GPIO_Pin_6 #define AD9834_SCLK GPIO_Pin_7 #define AD9834_SDATA GPIO_Pin_8 #define AD9834_RESET GPIO_Pin_9

#define AD9834_FSYNC_SET GPIO_SetBits(AD9834_Control_Port ,AD9834_FSYNC) #define

AD9834_FSYNC_CLR GPIO_ResetBits(AD9834_Control_Port ,AD9834_FSYNC) #define AD9834_SCLK_SET GPIO_SetBits(AD9834_Control_Port ,AD9834_SCLK) #define AD9834_SCLK_CLR GPIO_ResetBits(AD9834_Control_Port ,AD9834_SCLK) #define AD9834_SDATA_SET GPIO_SetBits(AD9834_Control_Port ,AD9834_SDATA) #define

AD9834_SDATA_CLR GPIO_ResetBits(AD9834_Control_Port ,AD9834_SDATA)

#define AD9834_RESET_SET GPIO_SetBits(AD9834_Control_Port ,AD9834_RESET) #define

AD9834_RESET_CLR GPIO_ResetBits(AD9834_Control_Port ,AD9834_RESET)

#define FREQ_0 0 #define FREQ_1 1

#define DB15 0 #define DB14 0 #define DB13 B28 #define DB12 HLB #define DB11 FSEL

#define DB10 PSEL #define DB9 PIN_SW #define DB8 RESET #define DB7 SLEEP1 #define DB6 SLEEP12 #define DB5 OPBITEN #define DB4 SIGN_PIB #define DB3 DIV2 #define DB2 0

#define DB1 MODE #define DB0 0

#define

CONTROL_REGISTER (DB15<<15)|(DB14<<14)|(DB13<<13)|(DB12<<12)|(DB11<<11)|(DB10<<10)\\

|(DB9<<9)|(DB8<<8)|(DB7<<7)|(DB6<<6)|(DB5<<5)|(DB4<<4)|(DB3<<3)|(DB2<<2)|(DB1<<1)|(DB0<<0)

/* AD9834函数声明 */

extern void AD9834_Write_16Bits(unsigned int data) ; //写一个字到AD9834 extern void AD9834_Select_Wave(unsigned int initdata) ; //选择输出波形 extern void Init_AD9834() ;//初始化配置

extern void AD9834_Set_Freq(unsigned char freq_number, unsigned long freq) ;//选择输出寄存器和输出频率值 #endif /* AD9834_H */

//================================================================// //====================AD9834.c====================================// #include \#include \

/**************************************************************** 函数名称: AD9834_Write_16Bits 功 能: 向AD9834写入16为数据 参 数: data -- 要写入的16位数据 返回值 : 无

*****************************************************************/ void AD9834_Write_16Bits(unsigned int data) {

unsigned char i = 0 ;

AD9834_SCLK_SET ; AD9834_FSYNC_CLR ; for(i=0 ;i<16 ;i++)

{

if(data & 0x8000)

AD9834_SDATA_SET ; else

AD9834_SDATA_CLR ;

AD9834_SCLK_CLR ; data <<= 1 ;

AD9834_SCLK_SET ; }

AD9834_FSYNC_SET ; }

/*********************************************************************************** 函数名称：AD9834_Select_Wave 功 能：软件为控制，

--------------------------------------------------

IOUT正弦波 ，SIGNBITOUT方波 ，写FREQREG0 ，写PHASE0 ad9834_write_16bit(0x2028) 一次性写FREQREG0

ad9834_write_16bit(0x0038) 单独改写FREQREG0的LSB ad9834_write_16bit(0x1038) 单独改写FREQREG0的MSB -------------------------------------------------- IOUT三角波 ，写PHASE0

ad9834_write_16bit(0x2002) 一次性写FREQREG0

ad9834_write_16bit(0x0002) 单独改写FREQREG0的LSB ad9834_write_16bit(0x1008) 单独改写FREQREG0的MSB 参 数：initdata -- 要输入的命令 返回值 ：无

************************************************************************************/ void AD9834_Select_Wave(unsigned int initdata) {

AD9834_FSYNC_SET; AD9834_SCLK_SET;

AD9834_RESET_SET; AD9834_RESET_SET; AD9834_RESET_CLR;

AD9834_Write_16Bits(initdata); }

/**************************************************************** 函数名称: Init_AD9834

功 能: 初始化AD9834控制引脚

参 数: 无 返回值 : 无

*****************************************************************/ void Init_AD9834() {

GPIO_InitTypeDef GPIO_InitStructure ;

GPIO_InitStructure.GPIO_Pin = AD9834_FSYNC | AD9834_SCLK | AD9834_SDATA | AD9834_RESET ;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; GPIO_Init(AD9834_Control_Port ,&GPIO_InitStructure) ; }

/**************************************************************** 函数名称: AD9834_Set_Freq 功 能: 设置频率值

参 数: freq_number -- 要写入的平率寄存器(FREQ_0或FREQ_1) freq -- 频率值 (Freq_value(value)=Freq_data(data)*FCLK/2^28) 返回值 : 无

*****************************************************************/

void AD9834_Set_Freq(unsigned char freq_number, unsigned long freq) {

unsigned long FREQREG = (unsigned

long)(268435456.0/AD9834_SYSTEM_COLCK*freq);

unsigned int FREQREG_LSB_14BIT = (unsigned int)FREQREG;

unsigned int FREQREG_MSB_14BIT = (unsigned int)(FREQREG>>14);

if(freq_number == FREQ_0) {

FREQREG_LSB_14BIT &= ~(1U<<15); FREQREG_LSB_14BIT |= 1<<14;

FREQREG_MSB_14BIT &= ~(1U<<15); FREQREG_MSB_14BIT |= 1<<14; } else {

FREQREG_LSB_14BIT &= ~(1<<14); FREQREG_LSB_14BIT |= 1U<<15; FREQREG_MSB_14BIT &= ~(1<<14); FREQREG_MSB_14BIT |= 1U<<15; }

AD9834_Write_16Bits(FREQREG_LSB_14BIT); AD9834_Write_16Bits(FREQREG_MSB_14BIT);

}

//============================================================// /* 注：使用时先调用初始化函数初始化IO配置，然后调用AD9834_Select_Wave()选择波形，最后选择频率值即可输出。 */

写得不是很好，拿出来分享一下，希望大家能够提点建议！

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