AD9910+STM32参考程序_ad9910_

#include 'pbdata.h' const uchar cfr1[4] = {0x00,0x40,0x00,x00}；//CF1控制字 [22] = 1:反sinc滤波器有效 uchar cfr2[4] = {0x01,0x00,0x00,0x00};//CF2控制字[23] = 1:内部I/O更新有效 const uchar cfr3[4] = {0x05,0x0f,0x41,0x32};CF3控制字，40M输入，25倍频，PDF工作，输入分频器工作，设置PLL电流，频段 uchar profile0[8] = {0x3f,0xff,0x00,0x00,0x25,0x09,0x7b,0x42};// // 01振幅控制，23相位控制，4567，频率调谐字 // 高字节 低字节 uchar drgparameter[20] = {0};//DRG参数 void AD9910_IOInit(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOA |RCC_APB 2Periph_GPIOC,ENABLE); GPIO_INitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_INitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_INitStructure.GPIO_Mode_Out_PP; GPIO_INit(GPIOB,&GPIO_INitStructure); GPIO_INitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_2; GPIO_INitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_INitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA,&GPIO_INitStructure); GPIO_INitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_8; GPIO_INitStructure.GPIO_Mode = GPIO_Mode_IPU;//上拉输入 GPIO_INit(GPIOA,&GPIO_INitStructure); GPIO_INitStructure.GPIO_Pin = GPIO_Pin_ALL^(GPIO_Pin_14 | GPIO_Pin_15); GPIO_INitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_INitStructure.GPIO_Mode = GPIO_Mode_Out_PP; } //================================================================ //==================发送8位数据程序===================================== void txd_8bit(uchar txdat) { uchar i,sbt; sbt = 0x80; SCLK = 0; for(i = 0; i < 8; i ++) { if((txdat & sbt) == 0) AD9910_SDIO = 0; else AD9910_SDIO = 1; SCLK = 1; sbt = sbt >> 1; SCLK = 0; } } //================================================================== //==========================ad9910初始化程序=========================== void Init_ad9910(void) { uchar k,m; AD9910_IOInit(); AD9910_PWR = 0;//1开启省电模式，0关闭 PROFILE2 = PROFILE1 = PROFILE0 = 0; DRCTL = 1; DRHOLD = 0;//DRCTL:数字斜坡控制，数字输入(高电平有效)控制斜率极性；DRHOLD：数字斜坡保持(高电平有效) DRG即数字斜坡发生器 MAS_REST = 1;//主机复位，高电平有效，所有储存元件清0，寄存器设置位默认值 delay_ms(5); MAS_REST = 0; CS = 0; txd_8bit(0x00);//CFR1控制字地址 for(m = 0; m < 4; m ++) txd_8bit(cfr1[m]); CS = 1; for(k = 0; k < 10; k ++) ; CS = 0; txd_8bit(0x01);//CFR2控制字 for(m = 0; m < 4; m ++) txd_8bit(cfr2[m]); CS =1; for(k = 0; k < 10; k ++) ; CS = 0; txd_8bit(0x02);//CFR3控制字 for(m = 0; m < 4; m ++) txd_8bit(cfr3[m]); CS =1; for(k = 0; k < 10; k ++) ; UP_DAT = 1; for(k = 0; k < 10; k ++) ; UP_DAT = 0; delay_ms(1); } //==================================================================== //==========================ad9910发送频率值程序=========================== void txfrc(void) { uchar m,k; CS = 0; txd_8bit(0x0e); for(m = 0; m < 8; m ++) txd_8bit(profile0[m]); CS = 1; for(k = 0; k < 10; k ++); UP_DAT = 1; for(k = 0; k < 10; k ++); UP_DAT = 0; delay_ms(1); } //============================================================ //======================计算频偏字，频率字和发送程序=================== void Freq_convert(ulong Freq) { ulong temp; if(Freq > 400_000_000)//400M Freq = 400000000; Temp = (ulong)Freq *4.294967296;//FTW = freq *(2^32/1G),1G是输入时钟 profile0[7] = (uchar)temp; profile0[6] = (uchar)(temp >> 8); profile0[5] = (uchar)(temp >> 16); profile0[4] = (uchar)(temp >> 24); txfrc(); } //========================================================================== //=========================计算幅度字和发送程序=================================== void write_Amplitude(uint Amp) { ulong temp; tmep = (ulong)Amp * 25.20615385;//将输入幅度因子分为两个字节，25.20615385 = 2^14/650; if(temp > 3fff) temp = 0x3fff; temp &= 0x3fff; profile0[1] = (uchar)Temp; profile0[0] = (uchar)(temp >> 8); txfrc(); } //============================================================================= //==========================ad9910发送DRG参数程序================================== void txdrg(void ) { uchar m ,k; CS = 0; txd_8bit(0x0b);发送数字斜坡限制地址0x0b; for(m = 0; m < 8; m ++) txd_8bit(drgparameter[m]); CS = 1; for(k = 0; k < 10; k ++); CS = 0; txd_8bit(0x0c);//发送数字斜坡步长地址0x0c for(m = 0 ; m < 16; m ++) txd_8bit(drgparameter[m]); CS =1; for(k = 0; k < 10; k ++); CS = 0; txd_8bit(0x0d);//发送数字斜坡速率地址0x0d for(m = 0; m < 20; m ++) txd_8bit(drgparameter[m]); CS = 1; for(k = 0; k < 10; k ++); UP_DAT = 1; for(k = 0; k < 10; k ++); UP_DAT = 0; delay_ms(1); } //==================================================================== //=========================扫频波参数设置和发送程序========================== void sweepfre(ulong sweepMinFre,ulong sweepMaxFre,ulong SweepStepFre,ulong SweepTime) { ulong Temp1,Temp2,ITemp3,DTemp3,ITemp4,DTemp4; Temp1 = (ulong)SweepMinFre * 4.294967296; if(SweepMaxFre > 400000000) SweepMaxFre = 400000000; Temp2 = (ulong)SweetMaxFre * 4.294967296; if(SweepStepFre > 400000000) SweepStepFre = 400000000; ITemp3 = (ulong)SweepStepFre * 4.294967296; DTemp3 = ITemp3; ITemp4 = (ulong)SweepTime * 250;//250 = 1000MHz / 4;单位us 为什么除以4?DDS时钟位1/4Fer t = 4p/freq;p是步进间隔 if(ITemp4 > 0xffff) ITemp4 = 0xffff; DTemp4 = ITemp4; //扫描下限 drgparameter[7] = (uchar)Temp1; drgparameter[6] = (uchar)(Temp1 >> 8); drgparameter[5] = (uchar)(Temp1 >> 16); drgparameter[4] = (uchar)(Temp1 >> 24); drgparameter[3] = (uchar) Temp2; drgparameter[2] = (uchar) (Temp2 >> 8); drgparameter[1] = (uchar) (Temp2 >> 16); drgparameter[0] = (uchar)(Temp2 >> 24); //频率步进（单位:hz） drgparameter[15] = (uchar)ITemp3; drgparameter[14] = (uchar) (ITemp3 >> 8); drgparameter[13] = (uchar) (ITemp3 >> 16); drgparameter[12] = (uchar) (ITemp3 >> 24); drgparameter[11] = (uchar) (DTemp3); drgparameter[10] = (uchar) (DTemp3 >> 8); drgparameter[11] = (uchar) (DTemp3 >> 16); drgparameter[10] = (uchar) (DTemp3 >> 24); //步进时间间隔（单位：us） drgparameter[19] = (uchar)ITemp4; drgparameter[18] = (uchar)(ITemp4 >> 8); drgparameter[17] = (uchar)(DTemp4); drgparameter[16] = (uchar)(DTemp4 >> 8); //发送DGR参数 Txdrg(); //============================================================================= } //==================================================================== AD9910 MAIN函数 //===================================================================== #include 'pbdata.h' void RCC_Configuration(void); //void GPIO_Configuration(void); extern uchar cfr2[4];//cfr2控制字 int main(void) { RCC_Configuration();//系统时钟初始化 //GPIO_Configuration();//端口时钟初始化 delay_init(72); Init_ad9910(); //初始状态：100hz,vpp=100mV Freq_convert(300000000);//写频率，输入范围1 ~400 000 000hz Write_Amplitude(150);//写幅度，幅度范围 1~650mV while(1) { if(PAin(0) == 0) { delay_ms(5); cfr2[1] = 0x00;//DRG 失能 Init_ad9910(); Write_Amplitude(100)//写幅度，幅度范围1~650mV Freq_convert(300000000);//写频率，输入范围1~400000000hz } // if(PAin(8) == 0) // { // delay_ms(5); // cfr2[1] = 0x0e;//DRG使能 // Init_ad9910(); // Write_Amplitude(500);x写幅度，幅度范围1~650mv // //扫频波下限频率，上限频率，频率步进(单位hz),步进时间间隔(单位us) // SweepFre(1000,100000,10,240);//步进时间范围1~262us // } } } void RCC_Configuration(void) { SystemInit(); // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能APB2外设(GPIOB)时钟 } void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_PIN = GP