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185 lines
6.6 KiB
Markdown
185 lines
6.6 KiB
Markdown
# DDS
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<el-tag effect="plain">SKU:U105</el-tag>
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<div class="product_pic"><img src="assets/img/product_pics/unit/dds/dds_01.webp"><img src="assets/img/product_pics/unit/dds/dds_02.webp"></div>
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## 描述
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**DDS** 是一款信号源Unit. 采用AD9833可编程波形发生器+STM32F0控制方案。提供I2C通信接口(addr:0x31)，实际使用时以配置寄存器的方式进行操作。能够非常方便的控制该信号源输出多种波形(正弦波、三角波、方波输出、锯齿波，信号输出幅值0-0.6V)，与调整频率、相位。并且支持休眠策略，空闲状态时能够进一步减小电能损耗。该Unit适用于各种测试仪器的电子线路原型设计中充当信号源。
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## 产品特性
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- 数字可编程频率和相位
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- 信号输出幅值0-0.6V
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- 正弦波/三角波/方波/锯齿波(固定频率:13.6KHz)/DC输出
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- 输出频率范围：0MHz至1MHz(10MHz基准时钟)
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- 28bit频率分辨率
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- 11bit相位分辨率
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## 包含
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- 1x DDS Unit
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- 1x HY2.0-4P线缆
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- 1x SMA-2.54mm线缆
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## 应用
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- 频率刺激/波形发生
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- 液流和气流测量
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- 传感器应用：接近度、运动和缺陷检测
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- 线路损耗/衰减
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- 测试与医疗设备
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- 扫描/时钟发生器
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- 时域反射(TDR)应用
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## 规格参数
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<table>
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<tr style="font-weight:bold">
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<td>规格</td>
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<td>参数</td>
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</tr>
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<tr>
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<td>支持波形</td>
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<td>正弦波/三角波/方波/锯齿波(固定频率:13.6KHz)/DC输出</td>
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</tr>
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<tr>
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<td>信号输出幅值</td>
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<td>0-0.6V</td>
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</tr>
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<tr>
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<td>输出频率范围</td>
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<td>0 MHz至1MHz(10 MHz基准时钟)</td>
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</tr>
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<tr>
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<td>频率分辨率</td>
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<td>28bit</td>
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</tr>
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<tr>
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<td>相位分辨率</td>
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<td>11bit</td>
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</tr>
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<tr>
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<td>净重</td>
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<td>11.1g</td>
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</tr>
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<tr>
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<td>毛重</td>
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<td>34.7g</td>
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</tr>
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<tr>
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<td>产品尺寸</td>
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<td>71*24*8mm</td>
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</tr>
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<tr>
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<td>包装尺寸</td>
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<td>88.5*60*21mm</td>
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</tr>
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</table>
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## EasyLoader
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>EasyLoader是一个简洁快速的程序烧录器，其内置了一个产品相关的案例程序，通过简单步骤将其烧录至主控，即可进行一系列的功能验证.**(程序烧录前，请根据设备类型安装相应驱动程序. M5Core型主机[请点击此处查看CP210X驱动安装教程](zh_CN/arduino/arduino_development?id=安装串口驱动)**
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<div class="easyloader-box">
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<div style="background-color:white;">
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<div><img src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/easyloader_intro.webp"></div>
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<div class="easyloader-btn">
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<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/Windows/UNIT/For%20M5Core/EasyLoader_DDS_UNIT_With_M5Core.exe">Windows</a>
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</div>
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</div>
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<div>
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<video id="example_video" controls>
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<source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/Unit/DDS_UNIT.mp4" type="video/mp4">
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</video>
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<div class="easyloader-mask">
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<a>
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<svg id="play-btn" t="1583228776634" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="4152" width="75" height="75"><path d="M512 0C229.216 0 0 229.216 0 512s229.216 512 512 512 512-229.216 512-512S794.784 0 512 0z m0 928C282.24 928 96 741.76 96 512S282.24 96 512 96s416 186.24 416 416-186.24 416-416 416zM384 288l384 224-384 224z" p-id="4153" fill="#007aff"></path></svg></a>
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<p>案例描述:</p>
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<p>控制DDS Unit输出正弦波/三角波/方波/锯齿波.</p>
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</div>
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</div>
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</div>
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## 相关链接
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- **[AD9833](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/unit/dds/ad9833.pdf)**
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## 案例程序
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### Arduino
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- [Arduino示例程序](https://github.com/m5stack/M5Stack/tree/master/examples/Unit/DDS_AD9833)
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## 原理图
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<img src="assets/img/product_pics/unit/dds/dds_sch.webp">
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## 管脚映射
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<table>
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<tr><td>M5Core</td><td>SCL</td><td>SDA</td><td>5V</td><td>GND</td></tr>
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<tr><td>DDS Unit</td><td>GPIO22</td><td>GPIO21</td><td>5V</td><td>GND</td></tr>
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</table>
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## 通讯协议
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- 协议类型I2C
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- I2C Address: **0x31**
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>写寄存器时，需要将最高位置1。mclk置1将保持输出最后一个信号幅值，DAC置1将停止Unit输出。
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```clike
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/*--------------------------------------------------------------------------------------------------*/
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| DDS CTRL REG | 0x20
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| ------------------------------------------------------------------------------------------------
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| dds_ctrl_reg[0] | R/W | System control
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| W | R | R | R | R | MODE |
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| -MODE: 000 Reserved
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| 001 SINE
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| 010 TRIANGLE
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| 011 SQUARE
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| 100 SAWTOOTH
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| 101 DC
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//
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| dds_ctrl_reg[1] | R/W | System control
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| W | FSELECT | PSELECT | S01 | S12 | RSET | R | R |
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| -FSELECT: 0 Used FREQ0
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1 Used FREQ1
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| -PSELECT: 0 Used PHASE0
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1 Used PHASE1
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| -SLEEP01: 1 Disenable mclk
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| -SLEEP12: 1 Disenable DAC
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/*----------------------------------------------------------------------------------------------------
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/*--------------------------------------------------------------------------------------------------*/
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| DDS FREQ PHASE REG | 0x30
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| ------------------------------------------------------------------------------------------------
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| dds_freq_phase_reg[0:3] | R/W | FREQ(28bit)
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| 31 | 30 | 29:28 | 27:0 |
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| W | N | R | freq reg 0 |
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//
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| dds_freq_phase_reg[4:5] | R/W | PHASE(12bit)
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| 15 | 14 | 13:12 | 11:0 |
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| W | N | R | phase reg 1 |
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//
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/*---------------------------------------------------------------------------------------------------*/
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```
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<script>
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var purchase_link = 'https://m5stack.com/products/dds-unit-ad9833';
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anchor_search(purchase_link);
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scrollFunc();
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</script> |