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【Vision Board 创客营】Vision Board上的DAC实践

发布于 2024-04-24 21:51:18 浏览：206 订阅该版

[tocm]

### 1、概述

感谢官方举办【Vision Board 创客营】活动，使得我有机会试用Vision Board开发板，体验嵌入式AI的快乐。在此，再次感谢官方以及导师们的热情帮助。在本次活动中，本人选择的是DAC功能的测试。

### 2、环境配置

##### 配置

系统：Win11

开发板：RA8-M85-vision-board

开发IDE：RTThread Studio 版本: 2.2.6

##### 环境配置

- 下载[开发所需软件资料](https://pan.baidu.com/s/1O38xjFGV2K1RP7tP1WlcvA?pwd=ra8v)

- 根据官方提供的[文档]( [Vision Board 环境搭建 (qq.com)](https://docs.qq.com/doc/DY2hkbVdiSGV1S3JM) )搭建开发环境

### 3、新建工程以及编写测试例程

1. 新建工程

- 打开RTThread Studio IDE ，选择文件 --> 新建 --> RT-Thread 项目

- 输入工程信息，可参考下图：

![创建工程.png](https://oss-club.rt-thread.org/uploads/20240424/3ee6415fabc4c61cce89a8f67b37682d.png.webp)

- 使能DAC驱动框架，可参考下图：

![配置驱动1.png](https://oss-club.rt-thread.org/uploads/20240424/88ba2fdd1ebd726b05dd502c3643a834.png)

![配置驱动2.png](https://oss-club.rt-thread.org/uploads/20240424/c1cc8f638ff9e7c307643d997e477b3c.png.webp)

- 打开RA Smart Configurator （记得选择sc_v2023-10_fsp_v5.1.0 文件夹），进行DAC硬件功能配置，具体可参考下图：

![引脚功能配置1.png](https://oss-club.rt-thread.org/uploads/20240424/dbf0330e097162594348253c8747111c.png.webp)

![引脚功能配置2.png](https://oss-club.rt-thread.org/uploads/20240424/7c10fcc8a38e13e6c28366de0b1451a8.png.webp)

![引脚功能配置3.png](https://oss-club.rt-thread.org/uploads/20240424/a2389c17a10a9a1d62f2eaf572201dc4.png.webp)

2. 测试程序

- 在工程src目录中，右键新建 test_dac.c 文件，文件内容如下：

```c
     /**
      功能说明：通过DAC生成一个正弦波，其中每一个dac的输出值，是通过py程序自动生成，可在附录中自取
     */
     /*
      * Copyright (c) 2006-2021, RT-Thread Development Team
      *
      * SPDX-License-Identifier: Apache-2.0
      *
      * Change Logs:
      * Date           Author       Notes
      * 2024-04-20     MagicKingC       the first version
      */
     #include <rtthread.h>
     #include <rtdevice.h>
     
     #define DAC_DEV_NAME    "dac0"
     #define DAC_DEV_CHANNEL 0
     
     static rt_uint32_t sin_wave_vaule[]={
             2048,2073,2098,2123,2149,2174,2199,2224,2249,2274,
             2299,2324,2349,2374,2399,2423,2448,2473,2497,2522,
             2546,2571,2595,2619,2643,2667,2691,2715,2739,2763,
             2786,2810,2833,2856,2879,2902,2925,2947,2970,2992,
             3015,3037,3059,3081,3102,3124,3145,3166,3187,3208,
             3229,3249,3269,3290,3309,3329,3349,3368,3387,3406,
             3425,3443,3462,3480,3498,3515,3533,3550,3567,3584,
             3600,3617,3633,3648,3664,3679,3694,3709,3724,3738,
             3752,3766,3780,3793,3806,3819,3831,3843,3855,3867,
             3878,3890,3900,3911,3921,3931,3941,3950,3960,3968,
             3977,3985,3993,4001,4008,4015,4022,4029,4035,4041,
             4046,4052,4057,4061,4066,4070,4074,4077,4080,4083,
             4086,4088,4090,4092,4093,4094,4095,4095,4095,4095,
             4094,4093,4092,4091,4089,4087,4084,4082,4079,4075,
             4072,4068,4064,4059,4054,4049,4044,4038,4032,4026,
             4019,4012,4005,3997,3989,3981,3973,3964,3955,3946,
             3936,3926,3916,3906,3895,3884,3873,3861,3849,3837,
             3825,3812,3799,3786,3773,3759,3745,3731,3717,3702,
             3687,3672,3656,3641,3625,3608,3592,3575,3559,3541,
             3524,3507,3489,3471,3453,3434,3416,3397,3378,3358,
             3339,3319,3300,3280,3259,3239,3218,3198,3177,3156,
             3134,3113,3091,3070,3048,3026,3004,2981,2959,2936,
             2913,2891,2868,2844,2821,2798,2774,2751,2727,2703,
             2679,2655,2631,2607,2583,2559,2534,2510,2485,2460,
             2436,2411,2386,2361,2336,2312,2287,2262,2237,2211,
             2186,2161,2136,2111,2086,2061,2035,2010,1985,1960,
             1935,1910,1885,1859,1834,1809,1784,1760,1735,1710,
             1685,1660,1636,1611,1586,1562,1537,1513,1489,1465,
             1441,1417,1393,1369,1345,1322,1298,1275,1252,1228,
             1205,1183,1160,1137,1115,1092,1070,1048,1026,1005,
             983,962,940,919,898,878,857,837,816,796,
             777,757,738,718,699,680,662,643,625,607,
             589,572,555,537,521,504,488,471,455,440,
             424,409,394,379,365,351,337,323,310,297,
             284,271,259,247,235,223,212,201,190,180,
             170,160,150,141,132,123,115,107,99,91,
             84,77,70,64,58,52,47,42,37,32,
             28,24,21,17,14,12,9,7,5,4,
             3,2,1,1,1,1,2,3,4,6,
             8,10,13,16,19,22,26,30,35,39,
             44,50,55,61,67,74,81,88,95,103,
             111,119,128,136,146,155,165,175,185,196,
             206,218,229,241,253,265,277,290,303,316,
             330,344,358,372,387,402,417,432,448,463,
             479,496,512,529,546,563,581,598,616,634,
             653,671,690,709,728,747,767,787,806,827,
             847,867,888,909,930,951,972,994,1015,1037,
             1059,1081,1104,1126,1149,1171,1194,1217,1240,1263,
             1286,1310,1333,1357,1381,1405,1429,1453,1477,1501,
             1525,1550,1574,1599,1623,1648,1673,1697,1722,1747,
             1772,1797,1822,1847,1872,1897,1922,1947,1973,1998,
             2023,2048
     };

/**
      * 通过dac生成sin波形
      * @param agrc
      * @param agrv
      * @return
      */
     static int sin_dac_sample(int agrc, char **agrv){
         rt_dac_device_t dac_dev;

//打开硬件外设
         dac_dev = (rt_dac_device_t)rt_device_find(DAC_DEV_NAME);
         if (dac_dev == RT_NULL) {
             rt_kprintf("can't find %s device\r\n",DAC_DEV_NAME);
             return -RT_ERROR;
         }

rt_dac_enable(dac_dev, DAC_DEV_CHANNEL);

rt_kprintf("begin echo sin wave\r\n");

for (int i = 0; i < 300; ++i)
         {
             for (int j = 0; j < sizeof(sin_wave_vaule)/sizeof(rt_uint32_t); ++j) {
                 rt_dac_write(dac_dev, DAC_DEV_CHANNEL, sin_wave_vaule[j]);
                 rt_thread_mdelay(1);
             }
         }

rt_kprintf("end echo sin wave\r\n");

return 0;
     }

MSH_CMD_EXPORT(sin_dac_sample,dac out sin wave sample)

```

- 进行程序编译，然后烧录到开发板

### 4、测试

1. 打开串口工具输入 ，在finsh 命令行中输入 sin_dac_sample ，然后回车，现象可看下图：

![测试图.png](https://oss-club.rt-thread.org/uploads/20240424/4c9fbc965b9a858e25deca4693f43ba0.png)

![000.BMP](https://oss-club.rt-thread.org/uploads/20240424/16c7f7e36a834dcda9f0f9b09eb4a91c.bmp)

到此测试完毕

### 5、总结

到此 DAC 测试已经完毕，感觉在本次测试下来的很顺利，开发速度非常块，需要简单的几个配置，就可以将DAC使用起来。