RT-Thread-【开发板评测】Renesas RA6M4开发板之DAC+光线传感器RT-Thread问答社区

【开发板评测】Renesas RA6M4开发板之DAC+光线传感器

发布于 2022-04-01 18:59:32 浏览：889 订阅该版

很高兴获得这次瑞萨的RA6M4评测机会，这次拿到的任务是DAC加光线传感器，首先这款板子上的芯片是真的大，144个脚，功能也很强大具体的不多说，只说今天的评测任务，先看一下板子：
   ![9201e9a4e21ca15304ca0133d8a940b.jpg](https://oss-club.rt-thread.org/uploads/20220401/f3e1ed5f90d79b6e5bdfc3345575da1d.jpg.webp)
  一，ADC测试流程，首先瑞萨提供了一款类似STM32CubeMX的套置工具，目前在RT-thread中使用需要配置，下面说一下具体的过程以及测试的情况，首先新建立一个基于CPK-RA6M4的工程![image.png](https://oss-club.rt-thread.org/uploads/20220401/30bc19f72acb415032ab0182e3f12245.png)
接下来在RT-thread中打开DAC功能![image.png](https://oss-club.rt-thread.org/uploads/20220401/867a2c65e11185d72051085447a0005f.png.webp)然后写点测试代码    
     for ( value =0;value <4000;value ++ )
       {
      rt_dac_write(dac_dev, DAC_DEV_CHANNEL, value);
      rt_kprintf("the value is :%d \n", value);

/* 转换为对应电压值 */
      vol = value * REFER_VOLTAGE / CONVERT_BITS;
      rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
      rt_thread_mdelay(2);
       }
       for (value =4000;value>0;value -- )
                 {
                rt_dac_write(dac_dev, DAC_DEV_CHANNEL, value);
                rt_kprintf("the value is :%d \n", value);

/* 转换为对应电压值 */
                vol = value * REFER_VOLTAGE / CONVERT_BITS;
                rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
                rt_thread_mdelay(2);
                 }

然后编译试一下，此时不出意外肯定报错，信息如下，提示缺少配置文件，![image.png](https://oss-club.rt-thread.org/uploads/20220401/e96a9197b9cedf4584daac252bf32d5e.png.webp)这个时候不要慌，也不要砸电脑，打开工程里面的RA智能配置![image.png](https://oss-club.rt-thread.org/uploads/20220401/bb2e67b25596500abb49ef7305d923bd.png)记得点开要把它加载到安装fsp安装目录下![image.png](https://oss-club.rt-thread.org/uploads/20220401/310bff81195e39bc6840c4fd1dae3c2a.png)接下来就把P014引脚的GPIO先关了，再把DAC打开，记得要NEW STACK一个DAC，配置如下![image.png](https://oss-club.rt-thread.org/uploads/20220401/a002198f108e2b22c14a8d578fd945cb.png.webp)接下点生成工程链接就好了，再回去RT-THREAD里面就能正常编译和烧录了，下面是测试视频[15b0f8cc3c9f6896b62f876f436054a1.mp4](https://oss-club.rt-thread.org/uploads/20220401/a1b33e9dba90a0ee49041b26ee4d9ffe.mp4)同时在串口里能看到打印信息，总体测试精度还是可以请看图
![image.png](https://oss-club.rt-thread.org/uploads/20220401/4d6d2ef22421f8619ab4c447acd3da63.png)![image.png](https://oss-club.rt-thread.org/uploads/20220401/79928014d3c1acb4a4840998873f989b.jpg.webp)

![image.png](https://oss-club.rt-thread.org/uploads/20220401/ab9475cf9cdc8fdc14b9033043503134.png)
![image.png](https://oss-club.rt-thread.org/uploads/20220401/68468ac9b026dc08acee1392fa16e003.jpg.webp)
![image.png](https://oss-club.rt-thread.org/uploads/20220401/17332d8cdafbc18cc07012c5a1ea09f0.png)
![image.png](https://oss-club.rt-thread.org/uploads/20220401/b63e3257fb4b28f4f974b912ea092708.jpg.webp)
DAC测试就介绍到这里。
  下面说一下光线传感器，这款板子上的光线传感器的样子![image.png](https://oss-club.rt-thread.org/uploads/20220401/18821283d34fec7e03f2296ef00f4d90.jpg.webp)表面看不出来是什么型号，通过官方开发板原理图知道是ISL29035![image.png](https://oss-club.rt-thread.org/uploads/20220401/4ee4ac0b81ae946cd4a56cbb43d1d9ad.png)这样就可以在rt-thread里面添加一个软件包![image.png](https://oss-club.rt-thread.org/uploads/20220401/e68f0802d1920819f0809889aaf3532d.png)
再要配置软件模拟IIC，器件地址要改一下

![image.png](https://oss-club.rt-thread.org/uploads/20220401/a75cca1295aece5a2f6921fe6ced4daf.png.webp)
接下来就能开始编译测试了，不出意外此时也没有意义，直接烧录，回到串口界面MSH里输入list_device看下有没有添加的设备信息!![image.png](https://oss-club.rt-thread.org/uploads/20220401/e8a202296e534ac17b4b51643a332c9e.png)接着开始输入sensor probe li_isl29 挂载设备![image.png](https://oss-club.rt-thread.org/uploads/20220401/eaad97062c6c3f233faaeab662cdb156.png)然后再list_device看一下有没有挂载成功![image.png](https://oss-club.rt-thread.org/uploads/20220401/35292ea422427766edf1b5616d3889a8.png)
成功之后可以开始使用器件去读了，我做了一个OP3001的对比测试，OP3001加了一个感光球罩，可以看得出来感光球罩的影响还是比较大。
![image.png](https://oss-club.rt-thread.org/uploads/20220401/16e656bc971d77c06f0a7d12167900bb.png)

![image.png](https://oss-club.rt-thread.org/uploads/20220401/395216ae9a7f459ea3104a7b2a3b35e4.png)

![image.png](https://oss-club.rt-thread.org/uploads/20220401/395216ae9a7f459ea3104a7b2a3b35e4.png)
![image.png](https://oss-club.rt-thread.org/uploads/20220401/fd4080d791b7216576187f65cca37131.jpg.webp)
好了此次测试任务到此结束，感谢瑞萨也感谢RT-THREAD,更感谢大家的阅读。[ra6m4_DAC_IIC_test.zip](https://oss-club.rt-thread.org/uploads/20220401/c74eed491102f606509b57d118a43936.zip)