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標題: 基于ADF4351的信號發生器 [打印本頁]

作者: 15034148562 時間: 2020-4-13 12:03
標題: 基于ADF4351的信號發生器
#include "ADF4351.h"
#include "delay.h"

//#define
#define ADF4351_R0 ((u32)0X2C8018)
#define ADF4351_R1 ((u32)0X8029)
#define ADF4351_R2 ((u32)0X10E42)
#define ADF4351_R3 ((u32)0X4B3)
#define ADF4351_R4 ((u32)0XEC803C)
#define ADF4351_R5 ((u32)0X580005)

#define ADF4351_R1_Base ((u32)0X8001)
#define ADF4351_R4_Base ((u32)0X8C803C)
#define ADF4351_R4_ON    ((u32)0X8C803C)
#define ADF4351_R4_OFF ((u32)0X8C883C)

#define ADF4351_RF_OFF ((u32)0XEC801C)

#define ADF4351_PD_ON ((u32)0X10E42)
#define ADF4351_PD_OFF ((u32)0X10E02)

void ADF_Output_GPIOInit(void)
{
GPIO_InitTypeDef GPIO_InitStruct;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStruct);

}

void ADF_Input_GPIOInit(void)
{
GPIO_InitTypeDef GPIO_InitStruct;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING ;
GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void delay (int length)
{
while (length >0)
length--;
}

void WriteToADF4351(u8 count, u8 *buf)
{
u8 ValueToWrite = 0;
u8 i = 0;
u8 j = 0;

// ADF_Output_GPIOInit();

ADF4351_CE = 1;
delay_us(1);
ADF4351_CLK = 0;
ADF4351_LE = 0;
delay_us(1);

for(i = count; i>0; i--)
{
ValueToWrite = *(buf+i-1);
for(j=0; j<8; j++)
{
if(0x80 == (ValueToWrite & 0x80))
{
ADF4351_OUTPUT_DATA = 1;
}
else
{
ADF4351_OUTPUT_DATA = 0;
}
delay_us(1);
ADF4351_CLK = 1;
delay_us(1);
ValueToWrite <<= 1;
ADF4351_CLK = 0;
}
}
ADF4351_OUTPUT_DATA = 0;
delay_us(1);
ADF4351_LE = 1;
delay_us(1);
ADF4351_LE = 0;
}

void ReadToADF4351(u8 count, u8 *buf)
{
u8 i = 0;
u8 j = 0;
u8 iTemp = 0;
u8 RotateData = 0;

ADF_Input_GPIOInit();
ADF4351_CE = 1;
delay_us(1);
ADF4351_CLK = 0;
ADF4351_LE = 0;
delay_us(1);

for(i = count; i>0; i--)
{
for(j = 0; j<8; j++)
{
RotateData <<=1;
delay_us(1);
iTemp = ADF4351_INPUT_DATA;
ADF4351_CLK = 1;
if(0x01 == (iTemp&0x01))
{
RotateData |= 1;
}
delay_us(1);
ADF4351_CLK = 0;
}
*(buf+i-1) = RotateData;
}
delay_us(1);
ADF4351_LE = 1;
delay_us(1);
ADF4351_LE = 0;
}

void ADF4351Init(void)
{
u8 buf[4] = {0,0,0,0};

ADF_Output_GPIOInit();

buf[3] = 0x00;
buf[2] = 0x58; //R5
buf[1] = 0x00; //write communication register 0x00580005 to control the progress
buf[0] = 0x05; //to write Register 5 to set digital lock detector
WriteToADF4351(4,buf);

buf[3] = 0x00; //R4
buf[2] = 0xec; //(DB23=1)The signal is taken from the VCO directly;(DB22-20:4H)the RF divider is 16;(DB19-12:C8H)R is 200
buf[1] = 0x80; //(DB11=0)VCO powerd up;
buf[0] = 0x3C; //(DB5=1)RF output is enabled;(DB4-3=3H)Output power level is 5
WriteToADF4351(4,buf);

buf[3] = 0x00;
buf[2] = 0x00; //R3
buf[1] = 0x04; //(DB14-3:96H)clock divider value is 150.
buf[0] = 0xB3;
WriteToADF4351(4,buf);

buf[3] = 0x00; //R2
// buf[2] = 0x01; //(DB6=1)set PD polarity is positive;(DB7=1)LDP is 6nS;
// buf[1] = 0x0E; //(DB8=0)enable fractional-N digital lock detect;
buf[2] = 0x00;
buf[1] = 0x4E;
buf[0] = 0x42; //(DB12-9:7H)set Icp 2.50 mA;
WriteToADF4351(4,buf); //(DB23-14:1H)R counter is 1

buf[3] = 0x00;
buf[2] = 0x00; //R1
buf[1] = 0x80;    //(DB14-3:6H)MOD counter is 6;
buf[0] = 0x29;    //(DB26-15:6H)PHASE word is 1,neither the phase resync
WriteToADF4351(4,buf);    //nor the spurious optimization functions are being used
   //(DB27=1)prescaler value is 8/9

buf[3] = 0x00;
buf[2] = 0x2c;
buf[1] = 0x80; //R0
buf[0] = 0x18; //(DB14-3:0H)FRAC value is 0;
WriteToADF4351(4,buf); //(DB30-15:140H)INT value is 320;

// WriteOneRegToADF4351(ADF4351_R0);
// WriteOneRegToADF4351(ADF4351_R1);
// WriteOneRegToADF4351(ADF4351_R2);
// WriteOneRegToADF4351(ADF4351_R3);
// WriteOneRegToADF4351(ADF4351_R4);
// WriteOneRegToADF4351(ADF4351_R5);

}
void WriteOneRegToADF4351(u32 Regster)
{
u8 buf[4] = {0,0,0,0};
buf[3] = (u8)((Regster>>24)&(0X000000FF));
buf[2] = (u8)((Regster>>16)&(0X000000FF));
buf[1] = (u8)((Regster>>8) &(0X000000FF));
buf[0] = (u8)((Regster)&(0X000000FF));
WriteToADF4351(4,buf);
}
void ADF4351_Init_some(void)
{
WriteOneRegToADF4351(ADF4351_R2);
WriteOneRegToADF4351(ADF4351_R3);
WriteOneRegToADF4351(ADF4351_R5);
}

void ADF4351WriteFreq(float Fre) // (xx.x) M Hz
{
u16 Fre_temp, N_Mul = 1, Mul_Core = 0;
u16 INT_Fre, Frac_temp, Mod_temp, i;
u32 W_ADF4351_R0 = 0, W_ADF4351_R1 = 0, W_ADF4351_R4 = 0;
float multiple;

if(Fre < 35.0)
Fre = 35.0;
if(Fre > 4400.0)
Fre = 4400.0;
Mod_temp = 250;
Fre = ((float)((u32)(Fre*10)))/10;

Fre_temp = Fre;
for(i = 0; i < 10; i++)
{
if(((Fre_temp*N_Mul) >= 2199.9) && ((Fre_temp*N_Mul) <= 4400.1))
break;
Mul_Core++;
N_Mul = N_Mul*2;
}

multiple = (Fre*N_Mul)/25; //帶寬出已固定為參考25M，若改參考頻率，則應修改R4低字節
INT_Fre = (u16)multiple;
// if(((u32)(multiple*10000)%10)> 5)
// multiple += 0.001;
Frac_temp = ((u32)(multiple*250))%250;
while(((Frac_temp%5) == 0) && ((Mod_temp%5) == 0))
{
Frac_temp = Frac_temp/5;
Mod_temp = Mod_temp/5;
}
while(((Frac_temp%2) == 0)&&((Mod_temp%2) == 0))
{
Frac_temp = Frac_temp/2;
Mod_temp = Mod_temp/2;
}

Mul_Core %= 7;
W_ADF4351_R0 = (INT_Fre<<15)+(Frac_temp<<3);
W_ADF4351_R1 = ADF4351_R1_Base + (Mod_temp<<3);
W_ADF4351_R4 = ADF4351_R4_ON + (Mul_Core<<20);

// WriteOneRegToADF4351(ADF4351_PD_OFF); //ADF4351_RF_OFF
// WriteOneRegToADF4351((u32)(ADF4351_R4_OFF + (6<<20)));
WriteOneRegToADF4351(ADF4351_RF_OFF);
WriteOneRegToADF4351(W_ADF4351_R1);
WriteOneRegToADF4351(W_ADF4351_R0);
WriteOneRegToADF4351(W_ADF4351_R4);
// WriteOneRegToADF4351(ADF4351_PD_ON);

// WriteOneRegToADF4351((u32)(ADF4351_R4_ON + (Mul_Core<<20)));
}

作者: admin 時間: 2020-4-14 01:20
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