AD9854原理图与单片机驱动程序设计

ID:221591 · 发表于 2017-7-22 14:39

AD9854原理图如下（pdf文档清晰版请下载附件）：

AD9854单片机源程序如下:

//=====================================================================
// AD9854 驱动程序设计
//AD9854.c
//说明：10MHZ 有源晶振
//=====================================================================
#include <reg52.h>
#include <lcd1602.h>
#include <intrins.h>
sfr P4 = 0xC0; //1111,1111 端口4
sbit KEY1 = P3^5;
sbit KEY2 = P3^4;
sbit KEY3 = P3^3;
sbit KEY4 = P3^2;
unsigned char FreqWord[6]; //6个字节频率控制字
/*
CLK_Set为时钟倍频设置，可设置4~20倍倍频，但最大不能超过300MHZ
Freq_mult_unsigned long和Freq_mult_doulle均为2的48次方除以系统时钟，一个为长整形，一个为双精度型
*/
#define CLK_Set 20
const unsigned long Freq_mult_ulong = 1407375;
const double Freq_mult_doulle = 1407374.88355328;
//**************************修改硬件时要修改的部分********************************
#define AD9854_DataBus P2
#define AD9854_AdrBus P0
sbit AD9854_RST = P3^6; //AD9854复位端口
sbit AD9854_UDCLK = P3^7; //AD9854更新时钟
sbit AD9854_WR = P4^1; //AD9854写使能，低有效
sbit AD9854_RD = P4^2; //AD9854读使能，低有效
sbit AD9854_FDATA = P4^3; //AD9854 FSK,PSK控制
sbit AD9854_OSK = P4^4; //AD9854 OSK控制端
unsigned char flag = 1;
unsigned int fc = 1000;
unsigned long LFerq = 750;
unsigned long HFerq = 1250;
void AD9854_WR_Byte(unsigned char addr,unsigned char dat);
void AD9854_Init(void);
void Freq_convert(long Freq);
void AD9854_InitFSK(void);
void AD9854_SetFSK(unsigned long Freq1,unsigned long Freq2);
//void delay (unsigned int us);
void UpDisplay()
{
unsigned char disbuf[5];
LCD_Write_String(0, 0, "BaseFerq M");
LCD_Write_String(0, 1, "Now Ferq M");
disbuf[0] = fc / 1000 + '0';
disbuf[1] = '.';
disbuf[2] = fc % 1000 / 100 + '0';
disbuf[3] = fc % 100 / 10 + '0';
disbuf[4] = fc % 10 + '0';
disbuf[5] = 0;
LCD_Write_String(9, 0, disbuf);
disbuf[0] = HFerq / 1000 + '0';
disbuf[1] = '.';
disbuf[2] = HFerq % 1000 / 100 + '0';
disbuf[3] = HFerq % 100 / 10 + '0';
disbuf[4] = HFerq % 10 + '0';
disbuf[5] = 0;
LCD_Write_String(9, 1, disbuf);
}
void DownDisplay()
{
unsigned char disbuf[5];
LCD_Write_String(0, 0, "BaseFerq M");
LCD_Write_String(0, 1, "Now Ferq M");
disbuf[0] = fc / 1000 + '0';
disbuf[1] = '.';
disbuf[2] = fc % 1000 / 100 + '0';
disbuf[3] = fc % 100 / 10 + '0';
disbuf[4] = fc % 10 + '0';
disbuf[5] = 0;
LCD_Write_String(9, 0, disbuf);
disbuf[0] = LFerq / 1000 + '0';
disbuf[1] = '.';
disbuf[2] = LFerq % 1000 / 100 + '0';
disbuf[3] = LFerq % 100 / 10 + '0';
disbuf[4] = LFerq % 10 + '0';
disbuf[5] = 0;
LCD_Write_String(9, 1, disbuf);
}
void AD9854_SetSine(unsigned long Freq,unsigned int Shape)
{
unsigned char count;
unsigned char Adress;
Adress = 0x04; //选择频率控制字地址的初值
Freq_convert(Freq); //频率转换
for(count=6;count>0;) //写入6字节的频率控制字
{
AD9854_WR_Byte(Adress++,FreqWord[--count]);
}
AD9854_WR_Byte(0x21,Shape>>8); //设置I通道幅度
AD9854_WR_Byte(0x22,(unsigned char)(Shape&0xff));
AD9854_WR_Byte(0x23,Shape>>8); //设置Q通道幅度
AD9854_WR_Byte(0x24,(unsigned char)(Shape&0xff));
AD9854_UDCLK=1; //更新AD9854输出
AD9854_UDCLK=0;
}
void main()
{
LCD_Init();
LCD_Clear();
/*LCD_Write_String(0,0,"BaseFerq 0.875 M");
LCD_Write_String(0,1,"Now Ferq 1.125 M");*/
UpDisplay();
AD9854_Init();
AD9854_SetSine(HFerq * 1000,4000);
// AD9854_SetSine(1000000,4000);
// while(1);
// AD9854_InitFSK();
//
// AD9854_SetFSK(HFerq * 1000, LFerq * 1000);
// AD9854_SetFSK(1000000,1000000);
// AD9854_FDATA = 1;
// while(1);
while(1)
{
if(!KEY1)
{
if (flag == 1)
{
AD9854_SetSine(0,0);
//AD9854_InitFSK();
flag = 0;
}
else
{
// AD9854_InitFSK();
// AD9854_SetFSK(HFerq * 1000, LFerq * 1000);
AD9854_SetSine(HFerq * 1000,4000);
flag = 1;
}
while (!KEY1);
}
if (flag == 1)
{
if (!KEY2)
{
AD9854_SetSine(0,0);
fc += 100;
if (fc == 7900) fc = 7800;
LFerq = fc * 3 / 4;
HFerq = fc * 5 / 4;
UpDisplay();
AD9854_SetSine(HFerq * 1000,4000);
// AD9854_InitFSK();
// AD9854_SetFSK(HFerq * 1000, LFerq * 1000);
while (!KEY2);
}
if (!KEY3)
{
AD9854_SetSine(0,0);
fc -= 100;
if (fc == 300) fc = 400;
LFerq = fc * 3 / 4;
HFerq = fc * 5 / 4;
UpDisplay();
AD9854_SetSine(HFerq * 1000,4000);
// AD9854_InitFSK();
// AD9854_SetFSK(HFerq * 1000, LFerq * 1000);
while (!KEY3);
}
if (!KEY4)
{
//AD9854_FDATA = 1;
AD9854_SetSine(LFerq * 1000,4000);
DownDisplay();
while (!KEY4);
AD9854_SetSine(HFerq * 1000,4000);
//AD9854_FDATA = 0;
UpDisplay();
}
}
}
}
//====================================================================================
//函数名称:void AD9854_WR_Byte(unsigned char addr,unsigned char dat)
//函数功能:AD9854并行口写入数据
//入口参数:addr 6位地址
// dat 写入的数据
//出口参数:无
//====================================================================================
void AD9854_WR_Byte(unsigned char addr,unsigned char dat)
{
AD9854_AdrBus = (addr&0x3f) | (AD9854_AdrBus&0xc0);
AD9854_DataBus = dat;
AD9854_WR = 0;
AD9854_WR = 1;
}
//====================================================================================
//函数名称:void AD9854_Init(void)
//函数功能:AD9854初始化
//入口参数:无
//出口参数:无
//====================================================================================
void AD9854_Init(void)
{
AD9854_WR=1;//将读、写控制端口设为无效
AD9854_RD=1;
AD9854_UDCLK=0;
AD9854_RST=1; //复位AD9854
AD9854_RST=0;
AD9854_WR_Byte(0x1d,0x10); //关闭比较器
AD9854_WR_Byte(0x1e,CLK_Set); //设置系统时钟倍频
AD9854_WR_Byte(0x1f,0x00); //设置系统为模式0，由外部更新
AD9854_WR_Byte(0x20,0x60); //设置为可调节幅度，取消插值补偿
AD9854_UDCLK=1; //更新AD9854输出
AD9854_UDCLK=0;
}
//====================================================================================
//函数名称:void Freq_convert(long Freq)
//函数功能:正弦信号频率数据转换
//入口参数:Freq 需要转换的频率，取值从0~SYSCLK/2
//出口参数:无但是影响全局变量FreqWord[6]的值
//说明：该算法位多字节相乘算法，有公式FTW = (Desired Output Frequency × 2N)/SYSCLK
// 得到该算法，其中N=48，Desired Output Frequency 为所需要的频率，即Freq，SYSCLK
// 为可编程的系统时钟，FTW为48Bit的频率控制字，即FreqWord[6]
//====================================================================================
void Freq_convert(long Freq)
{
unsigned long FreqBuf;
unsigned long Temp=Freq_mult_ulong;
unsigned char Array_Freq[4]; //将输入频率因子分为四个字节
Array_Freq[0]=(unsigned char)Freq;
Array_Freq[1]=(unsigned char)(Freq>>8);
Array_Freq[2]=(unsigned char)(Freq>>16);
Array_Freq[3]=(unsigned char)(Freq>>24);
FreqBuf=Temp*Array_Freq[0];
FreqWord[0]=FreqBuf;
FreqBuf>>=8;
FreqBuf+=(Temp*Array_Freq[1]);
FreqWord[1]=FreqBuf;
FreqBuf>>=8;
FreqBuf+=(Temp*Array_Freq[2]);
FreqWord[2]=FreqBuf;
FreqBuf>>=8;
FreqBuf+=(Temp*Array_Freq[3]);
FreqWord[3]=FreqBuf;
FreqBuf>>=8;
FreqWord[4]=FreqBuf;
FreqWord[5]=FreqBuf>>8;
}
//====================================================================================
//函数名称:void AD9854_InitFSK(void)
//函数功能:AD9854的FSK初始化
//入口参数:无
//出口参数:无
//====================================================================================
void AD9854_InitFSK(void)
{
AD9854_WR=1; //将读、写控制端口设为无效
AD9854_RD=1;
AD9854_UDCLK=0;
AD9854_RST=1; //复位AD9854
AD9854_RST=0;
AD9854_WR_Byte(0x1d,0x10); //关闭比较器
AD9854_WR_Byte(0x1e,CLK_Set); //设置系统时钟倍频
AD9854_WR_Byte(0x1f,0x02); //设置系统为模式1，由外部更新
AD9854_WR_Byte(0x20,0x60); //设置为可调节幅度，取消插值补偿
AD9854_UDCLK=1; //更新AD9854输出
AD9854_UDCLK=0;
}
//====================================================================================
//函数名称:void AD9854_SetFSK(unsigned long Freq1,unsigned long Freq2)
//函数功能:AD9854的FSK设置
//入口参数:Freq1 FSK频率1
// Freq2 FSK频率2
//出口参数:无
//====================================================================================
void AD9854_SetFSK(unsigned long Freq1,unsigned long Freq2)
{
unsigned char count=6;
unsigned char Adress1,Adress2;
const unsigned int Shape=4000; //幅度设置. 为12 Bit,取值范围为(0~4095)
Adress1=0x04; //选择频率控制字1地址的初值
Adress2=0x0a; //选择频率控制字2地址的初值
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