AD9106 相关问题

cheney03 发表于 2021-4-20 11:28

本帖最后由 cheney03 于 2021-4-20 11:34 编辑

<p>项目要用到AD9106这款芯片，现在遇到了点问题.</p>

<p> 首先我把我的需求说一下。我需要至少生成两路正弦波，并且能够同步输出，幅度/相位/频率（频率固定60/120/240/480/960KHz）均可改变。</p>

<p>因为我的输出频率在1MHz以下，所以时钟我采用的是单端输入，参考的是数据手册page 24of48 图39设计，如图此设计是否可行？</p>

<div style="text-align:start; text-indent:0px; -webkit-text-stroke-width:0px">
<p> </p>

<p><span style="font-size:14px"><span style="color:#000000"><span style="font-family:"lucida Grande", Verdana, "Microsoft YaHei""><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#ffffff"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="line-height:23.8px">我采用的是单片机IO口模拟SPI写AD9106，目前棘手的问题是数据无法写入芯片,SPI写数据正确，已经用逻辑分析仪验证</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
</div>

<div style="text-align:start; text-indent:0px; -webkit-text-stroke-width:0px">
<p><span style="font-size:14px"><span style="color:#000000"><span style="font-family:"lucida Grande", Verdana, "Microsoft YaHei""><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#ffffff"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="line-height:23.8px"> 因为配置BGDR（写地址0x03）,改变数据，通过万用表测量到REFIO引脚的无电平变化，正常改变code值，VREFIO的值也会改变。</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
</div>

<div style="text-align:start; text-indent:0px; -webkit-text-stroke-width:0px">
<p> </p>
</div>

<p> </p>

cheney03 发表于 2021-4-20 11:39

<p>原理图是参考虾哥的帖子https://bbs.eeworld.com.cn/thread-511550-1-1.html，还有官方设计的</p>

cheney03 发表于 2021-4-20 11:43

<pre>
<code>
#include <reg52.h>
#include <intrins.h>
sbit TRIGGER =P2^0;
sbit SCLK =P2^1;
sbit SDIO =P2^2;
sbit CS    =P2^3;
sbit RESET =P2^4;

void SET_CS()
{
CS=1;    //P2.3->/CS, /CS=1
}

void CLR_CS()
{
CS=0;          // /CS=0
}

void SET_SCLK()
{
SCLK=1;       //P2.3->SCLK, SCLK=1
}

void CLR_SCLK()
{
SCLK=0; // SCLK=0
}

void SET_SDIO(void)
{
SDIO=1;       //P2.2->SDIO, SDIO=1
}

void CLR_SDIO(void)
{
SDIO=0; //SDIO=0
}

void SET_Trigger(void)
{
TRIGGER=1;       //P2.3->Trigger, Trigger=1
}

void CLR_Trigger(void)
{
TRIGGER=0;    //Trigger=0
}

void SET_Reset(void)
{
RESET=1;       //P2.3->Trigger, Trigger=1
}

void CLR_Reset(void)
{
TRIGGER=0;    //Trigger=0
}

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

void spi_write_byte(unsigned char temp)
{
unsigned char i;
for(i=0;i<8;i++)//32
{
if(temp&0x80)
{
   SET_SDIO();                   //Send 1 to SDIO pin
}
else
{
CLR_SDIO();                //Send 0 to SDIO pin
}

delay(1);
SET_SCLK();    //SCLK Rising
delay(2);
CLR_SCLK();    //SCLK falling
delay(1);
temp<<= 1;                         //Rotate data
}
}

void WriteToAD9106(unsigned int Address, unsigned int Data)
{

CLR_CS();
CLR_SCLK();

delay(1);
spi_write_byte(Address >> 8);
spi_write_byte(Address);

spi_write_byte(Data >> 8);
spi_write_byte(Data);
SET_CS();
}

//void WriteToAD9106(unsigned int InstruAndData,unsigned int InstruAndData2)
//{
//unsignedint SendValue =0;
//unsignedint SendValue2 =0;
//unsignedint i = 0;

//SendValue = InstruAndData;
//SendValue2 = InstruAndData2;
//delay(1);
//                                     //bring CS low
//CLR_SCLK();
//CLR_CS();
//delay(1);
//for(i=0;i<16;i++)//32
//{
// if(SendValue&0x8000)
// {
// SET_SDIO();                   //Send 1 to SDIO pin
// }
// else
// {
// CLR_SDIO();                //Send 0 to SDIO pin
// }

// delay(1);
// SET_SCLK();    //SCLK Rising
// delay(2);
// CLR_SCLK();    //SCLK falling
// delay(1);
// SendValue <<= 1;                   //Rotate data
// }
//for(i=0;i<16;i++)//32
//{

// if(SendValue2&0x8000)
// {
// SET_SDIO();                   //Send 1 to SDIO pin
// }
// else
// {
// CLR_SDIO();                //Send 0 to SDIO pin
// }
// delay(1);
// SET_SCLK();    //SCLK Rising
// delay(2);
// CLR_SCLK();    //SCLK falling
// delay(1);
// SendValue <<= 1;                   //Rotate data
// }

// SET_CS();                      //bring CS high again
//}

void AD9106_Init()
{
SET_CS();
SET_Trigger();
CLR_Reset();
delay(14);
SET_Reset();

WriteToAD9106(0x001f,0x0000);//模式连续运行。
WriteToAD9106(0x000c,0x9f1f);
WriteToAD9106(0x0027,0x3131);//DDS输出,预存波形
WriteToAD9106(0x0037,0x00fc);//上斜坡锯齿波

WriteToAD9106(0x0035,0x4000);//Data=0x4000Very important,the maximum value is 0x4000
WriteToAD9106(0x003e,0x006c);//Register 0x3E, Data=0x0E38
WriteToAD9106(0x003f,0xe600);//Register 0x3F, Data=0xE600    5MHz output,50MHz fsys
WriteToAD9106(0x001d,0x0001);//用新配置更新所有SPI设置(自清零)

WriteToAD9106(0x001e,0x0001);//PAT_STATUS 0x1E, run bit=1    Very important
WriteToAD9106(0x001d,0x0001);
delay(14);
CLR_Trigger();
WriteToAD9106(0x001d,0x0001);
}

void main()
{
//unsignedint InstruAndData_PatternType=0x001F0000;          //Register 0x1F,Data=0x0000(Continuous)
//unsignedint InstruAndData_Wave4=0x00263131;                //Register 0x26,Data=0x3131(wavefrom typ)    DAC4 and DAC3 select the DDS prestore wave form.
//unsignedint InstruAndData_DGAIN4=0x00324000;             //DAC4_DGAIN 0x32, Data=0x4000Very important,the maximum value is 0x4000
//unsignedint InstruAndData_DGAIN3=0x00334000;          //DAC3_DGAIN 0x33,
//unsignedint InstruAndData_DDSMSB=0x003E1999;//0x003E0E38; //Register 0x3E, Data=0x0E38
//unsignedint InstruAndData_DDSLSB=0x003F9A00;//0x003FE600; //Register 0x3F, Data=0xE600    10MHz output,180MHz fsys 10M=(FTW/2^24)*180M FTW=0XE38E6(932067.5555555556)
//unsignedint InstruAndData_DDS4_PW=0x00401300;             //Register 0x40, DDS4degree    adjust the DDS4 and DDS3 to have the same phase
//unsignedint InstruAndData_Run=0x001E0001;                //PAT_STATUS 0x1E, run bit=1    Very important
//unsignedint InstruAndData_update=0x001D3D70;//0x001D0001; //Register 0x1D, Data=0xE600

// AD9106_Init();

while(1)
{

//    AD9106_Init();
   WriteToAD9106(0x0003,0x003F);

////WriteToAD9106(0x3203,0x982F);
////WriteToAD9106(InstruAndData_PatternType);
// WriteToAD9106(0x001F,0x0000);
////WriteToAD9106(InstruAndData_Wave4);
//    WriteToAD9106(0x0026,0x3131);
////WriteToAD9106(InstruAndData_DGAIN4);
//    WriteToAD9106(0x0032,0x4000);
////WriteToAD9106(InstruAndData_DGAIN3);
// WriteToAD9106(0x0033,0x4000);
////WriteToAD9106(InstruAndData_DDSMSB);
// WriteToAD9106(0x003E,0x1999);
////WriteToAD9106(InstruAndData_DDSLSB);
//    WriteToAD9106(0x003F,0x9A00);
////WriteToAD9106(InstruAndData_DDS4_PW);
// WriteToAD9106(0x0040,0x1300);

////WriteToAD9106(InstruAndData_update);
// WriteToAD9106(0x001D,0x3D70);
////WriteToAD9106(InstruAndData_Run);
// WriteToAD9106(0x001E,0x0001);
////WriteToAD9106(InstruAndData_update);
// WriteToAD9106(0x001D,0x3D70);
// delay(10);
// CLR_Trigger();
////WriteToAD9106(InstruAndData_update);
// WriteToAD9106(0x001D,0x3D70);
////while(1);
//
}
}

</code></pre>

<p> </p>

littleshrimp 发表于 2021-4-20 11:48

<p>用示波器测量一下时钟“CLKP”是否正常，用万用表测试一下AVDD，DVDD电压是否正常，除硬件问题。</p>

<p>芯片复位后，使用SPI读取全部非零的寄存器，对比数据手册看数值是否一致。</p>

<p>用官方提供的ADuC7026例程做移植，或者参照https://wiki.analog.com/resources/eval/dpg/eval-ad9106这里的例程测试能否正常通信。</p>

<p> </p>

cheney03 发表于 2021-4-20 11:50

cheney03 发表于 2021-4-20 11:43
#include <reg52.h>
#include <intrins.h>
sbit TRIGGER =P2^0;
sbit SCLK =P2^1;
sbit ...

<p>程序也是参考官方的，发现用官方的SPI写例程连续写地址+数据共32位数据不对，后面我分开写地址和数据，用逻辑分析仪I抓取SPI写数据正确，但是数据无法写入芯片，WriteToAD9106(0x0003,0x003F);写地址0x0003,改变数据字，通过万用表测量到REFIO引脚的无电平变化,说明数据没有写入</p>

littleshrimp 发表于 2021-4-20 12:49

cheney03 发表于 2021-4-20 11:50
程序也是参考官方的，发现用官方的SPI写例程连续写地址+数据共32位数据不对，后面我分开写地址和数据，用 ...

<p>可以试着排除硬件或通信问题，比如复位后读全部非零寄存器，或者写入后再读出对比看是否一致。</p>

<p>或者测量硬件看是否正常。</p>

cheney03 发表于 2021-4-20 15:00

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-20 12:49
可以试着排除硬件或通信问题，比如复位后读全部非零寄存器，或者写入后再读出对比看是否一致。

或者测 ...

<p>还有一个疑问，我主机MCU供电电压是5V的，AD9106的供电电压3.3V，SPI通讯是否要求主从机电压一致？若像我这样SPI通讯，电压过高是否会损坏或者击穿芯片？</p>
</div><script>showreplylogin();</script><script type="text/javascript">(function(d,c){var a=d.createElement("script"),m=d.getElementsByTagName("script"),eewurl="//counter.eeworld.com.cn/pv/count/";a.src=eewurl+c;m.parentNode.insertBefore(a,m)})(document,523)</script>

cheney03 发表于 2021-4-20 15:34

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-20 11:48
用示波器测量一下时钟“CLKP”是否正常，用万用表测试一下AVDD，DVDD电压是否正常，除硬件问题。 ...

<p>示波器测输入时钟晶振输入正常，AVDD,DVDD均为3.3V，接REFIO电容两端参考电压为0.999V，DLDO1/DLDO2/CLKLDO 电容两端电压均为1.8V</p>
</div><script>showreplylogin();</script>

littleshrimp 发表于 2021-4-20 16:29

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-20 15:00
还有一个疑问，我主机MCU供电电压是5V的，AD9106的供电电压3.3V，SPI通讯是否要求主从机电压一致？若像我 ...

<p>不能使用5V驱动，应该会损坏，但不一定肯定会损坏。</p>

<p></p>
</div><script>showreplylogin();</script>

littleshrimp 发表于 2021-4-20 16:29

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-20 15:34
示波器测输入时钟晶振输入正常，AVDD,DVDD均为3.3V，接REFIO电容两端参考电压为0.999V，DLDO1/DLDO2/CLKL ...

<p>那还是重点检查通信吧，应该是通信方面的问题。</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-20 16:37

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-20 16:29
那还是重点检查通信吧，应该是通信方面的问题。

<p>我也觉得通信方面问题比较大，写数据我用逻辑分析仪抓取数据是对的，读要怎么读寄存器呢，小白不怎么会写程序</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-20 16:40

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-20 16:37
我也觉得通信方面问题比较大，写数据我用逻辑分析仪抓取数据是对的，读要怎么读寄存器呢，小白不怎么会写 ...

<pre>
<code>从AD9106写一字节,模拟SPI总线方式
void spi_write_byte(unsigned char temp)
{
unsigned char i;
for(i=0;i<8;i++)//32
{
if(temp&0x80)
{
   SET_SDIO();                   //Send 1 to SDIO pin
}
else
{
CLR_SDIO();                //Send 0 to SDIO pin
}

delay(1);
SET_SCLK();    //SCLK Rising
delay(2);
CLR_SCLK();    //SCLK falling
delay(1);
temp<<= 1;                         //Rotate data
}
}

//从AD9106读一字节,模拟SPI总线方式
unsigned char spi_read_byte()
{
unsigned char tdata,i;
for(i=8;i;i--)
{ delay(1);
   CLR_SCLK();
   delay(2);
   SET_SCLK();
   tdata<<=1;
   if(SDIO)
tdata|=1;

}
return tdata;
}

unsigned int Read_AD9106(unsigned int Address)
{

unsigned int data1,data2;
unsigned int tdata;

CLR_CS();
CLR_SCLK();

delay(1);
spi_write_byte(Address >> 8);//
spi_write_byte(Address); //发送命令字和地址

data1=spi_read_byte(); //读取数据
data2=spi_read_byte();

SET_CS();
tdata=(data1<<8)|data2;
return tdata;
}
</code></pre>

<p> </p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-20 16:45

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-20 16:29
那还是重点检查通信吧，应该是通信方面的问题。

<p>先发送命令字+地址  接着读两字节（数据为16位），然后两字节数据再做处理，这样时序方面有没错呢？</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-21 11:40

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-20 16:29
那还是重点检查通信吧，应该是通信方面的问题。

<p>有个很奇怪的现象，按图中接法，逻辑分析仪单独接单片机，抓取的数据正确，但是中间连接了我的AD9106实验板，无法抓取数据，感觉是芯片的SLCK/SDIO/CS这几引脚有阻碍作用。AD9106的输入时钟（CLKP/CLKN）对SPI通讯没影响吧，是不是只要上电，硬件SLCK/SDIO/CS连接正确就能写数据到芯片？</p>
</div><script>showreplylogin();</script>

littleshrimp 发表于 2021-4-21 12:01

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-21 11:40
有个很奇怪的现象，按图中接法，逻辑分析仪单独接单片机，抓取的数据正确，但是中间连接了我的AD9106实验 ...

<p>现在两端的电平都是3.3V吗？</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-21 13:31

<div class='shownolgin' data-isdigest='no'>littleshrimp 发表于 2021-4-21 12:01
现在两端的电平都是3.3V吗？

<p>是的，电平一样。<strong>问题终于解决了，是我SPI通讯线过长，之前的线长40cm,换了20cm的，成功写入</strong>。再次感谢你的解答，后面可能还会遇到问题，到时再向你请教。</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-21 15:40

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-21 11:40
有个很奇怪的现象，按图中接法，逻辑分析仪单独接单片机，抓取的数据正确，但是中间连接了我的AD9106实验 ...

<p>现在SPI写数据可以写入芯片，改变BGDR值，<span style="font-size:9.5pt"><span style="font-family:MinionPro-Regular"><span style="color:#070001">V</span></span></span><span style="font-size:5.5385pt"><span style="font-family:MinionPro-Regular"><span style="color:#070001">REFIO</span></span></span><span style="font-size:9.5pt"><span style="font-family:IYGYJS+HYa3gj"><span style="color:#070001">电平有改变.。但是我的数据跟数据手册中的不一样。当</span></span></span>BGDR=0x00时，电压应该是1.04V，我的测出来是0.98V。当BGDR=0x20(32)时，电压应该是0.84V，我的测出来是0.78V。</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-25 11:03

<div class='shownolgin' data-isdigest='no'><p>波形已经调出来了，但是波形不稳会上下抖动，而且一段时间后会失真</p>
</div><script>showreplylogin();</script>

cheney03 发表于 2021-4-25 11:06

<div class='shownolgin' data-isdigest='no'> 本帖最后由 cheney03 于 2021-4-25 11:07 编辑

<pre>
<code>void AD9106_Init()
{
SET_CS();
SET_Trigger();
CLR_Reset();
delay(14);
SET_Reset();

WriteToAD9106(0x001f,0x0000);    //模式连续运行。
// WriteToAD9106(0x0009,0x9F1F);    // DAC4 RSET(0x000c,0x9f1f);DAC1 RSET
WriteToAD9106(0x0026,0x3131);    //(0x0027,0x3131); //DDS输出,预存波形
WriteToAD9106(0x0032,0x4000);    // DAC4_DGAIN
WriteToAD9106(0x0033,0x4000);    // DAC3_DGAIN

//WriteToAD9106(0x0036,0x00fc);    //DAC3/4 //(0x0037,0x00fc); DAC1/2锯齿配置寄存器上斜坡锯齿波

//WriteToAD9106(0x0035,0x4000);    //Data=0x4000Very important,the maximum value is 0x4000
WriteToAD9106(0x003e,0x0A3D); //    //Register 0x3E, Data=0x009D
WriteToAD9106(0x003f,0x7100); //    //Register 0x3F, Data=0x4900    1MHz output,25MHz fsys
WriteToAD9106(0x001d,0x0001);    //用新配置更新所有SPI设置(自清零)

WriteToAD9106(0x001e,0x0001);    //PAT_STATUS 0x1E, run bit=1    Very important
WriteToAD9106(0x001d,0x0001);    //用新配置更新所有SPI设置(自清零)
delay(14);
CLR_Trigger();
WriteToAD9106(0x001d,0x0001);    //用新配置更新所有SPI设置(自清零)
}</code></pre>

<p>初始化函数是按这个配置的</p>
</div><script>showreplylogin();</script>

littleshrimp 发表于 2021-4-25 11:25

<div class='shownolgin' data-isdigest='no'>cheney03 发表于 2021-4-25 11:06
void AD9106_Init()
{
SET_CS();
SET_Trigger();
CLR_Reset();
delay(14);
SET_R ...

<p>你的电流输出没有加缓冲放大器是吗？</p>
</div><script>showreplylogin();</script>

页: [1] 2 3

电子工程世界-论坛's Archiver

AD9106 相关问题