瑞萨CPK-RA6M4 开发板测评+DAC输出正弦波

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瑞萨CPK-RA6M4 开发板测评+DAC输出正弦波 [复制链接]

拿到开发板一段时间了，断续开始学习RTT，目前先做了下简单的外设功能，已经适配了的外设，我选择使用DAC输出正弦波测试。下面就看下我怎么添加的。

首先还是需要在工程中找到RA Smart工具配置外设引脚功能。

新建一个DAC外设。

这里进去就选择模拟设备，然后选择DAC即可。

进去后需要配置输出的管脚，跟着箭头就能完成配置。

之后记得生成下。

之后配置RTT，使能DAC即可。然后就可以点击构建项目，就能生成代码了。

生成了一个dac.c的文件，之后我们进去之前的main函数中修改。修改方式就按照dac.c中的一个初始化函数来即可。

#define DAC_DEV_NAME "dac0"

#define DAC_DEV_CHANNEL 0



static rt_dac_device_t dac_device = RT_NULL;





//设置了个数组存放正弦波的数据

const uint16_t Sine12bit2[500] = {

                      2048,2073,2099,2125,2150,2176,2202,2227,2253,2279,2304,2330,2355,2380,

2406,2431,2456,2482,2507,2532,2557,2582,2606,2631,2656,2680,2705,2729,2753,

2777,2801,2825,2849,2872,2896,2919,2942,2966,2988,3011,3034,3056,3079,3101,

3123,3145,3166,3188,3209,3230,3251,3272,3292,3313,3333,3353,3372,3392,3411,

3430,3449,3468,3486,3504,3522,3540,3558,3575,3592,3609,3625,3641,3657,3673,

3689,3704,3719,3734,3748,3762,3776,3790,3803,3816,3829,3842,3854,3866,3878,

3889,3900,3911,3921,3932,3942,3951,3961,3970,3978,3987,3995,4003,4010,4017,

4024,4031,4037,4043,4048,4054,4059,4063,4068,4072,4075,4079,4082,4085,4087,

4089,4091,4092,4094,4094,4095,4095,4095,4094,4094,4092,4091,4089,4087,4085,

4082,4079,4075,4072,4068,4063,4059,4054,4048,4043,4037,4031,4024,4017,4010,

4003,3995,3987,3978,3970,3961,3951,3942,3932,3921,3911,3900,3889,3878,3866,

3854,3842,3829,3816,3803,3790,3776,3762,3748,3734,3719,3704,3689,3673,3657,

3641,3625,3609,3592,3575,3558,3540,3522,3504,3486,3468,3449,3430,3411,3392,

3372,3353,3333,3313,3292,3272,3251,3230,3209,3188,3166,3145,3123,3101,3079,

3056,3034,3011,2988,2966,2943,2919,2896,2872,2849,2825,2801,2777,2753,2729,

2705,2680,2656,2631,2606,2582,2557,2532,2507,2482,2456,2431,2406,2381,2355,

2330,2304,2279,2253,2227,2202,2176,2150,2125,2099,2073,2048,2022,1996,1970,

1945,1919,1893,1868,1842,1816,1791,1765,1740,1715,1689,1664,1639,1613,1588,

1563,1538,1513,1489,1464,1439,1415,1390,1366,1342,1318,1294,1270,1246,1223,

1199,1176,1153,1129,1107,1084,1061,1039,1016,994,972,950,929,907,886,865,

844,823,803,782,762,742,723,703,684,665,646,627,609,591,573,555,537,520,

503,486,470,454,438,422,406,391,376,361,347,333,319,305,292,279,266,253,

241,229,217,206,195,184,174,163,153,144,134,125,117,108,100,92,85,78,71,

64,58,52,47,41,36,32,27,23,20,16,13,10,8,6,4,3,1,1,0,0,0,1,1,3,4,6,8,10,

13,16,20,23,27,32,36,41,47,52,58,64,71,78,85,92,100,108,117,125,134,144,

153,163,174,184,195,206,217,229,241,253,266,279,292,305,319,333,347,361,

376,391,406,422,438,454,470,486,503,520,537,555,573,591,609,627,646,665,

684,703,723,742,762,782,803,823,844,865,886,907,929,950,972,994,1016,1039,

1061,1084,1107,1129,1153,1176,1199,1223,1246,1270,1294,1318,1342,1366,1390,

1415,1439,1464,1489,1513,1538,1563,1588,1613,1639,1664,1689,1715,1740,1765,

1791,1816,1842,1868,1893,1919,1945,1970,1996,2022};





void hal_entry(void)

{

    rt_kprintf("\nHello RT-Thread!\n");

    static int i = 0;



    dac_device = (rt_dac_device_t )rt_device_find(DAC_DEV_NAME);

   if (dac_device == RT_NULL)

   {

       rt_kprintf("dac sample run failed! can't find %s device!\n", DAC_DEV_NAME);

   }



   rt_dac_enable(dac_device, DAC_DEV_CHANNEL);







    while (1)

    {

//        rt_pin_write(LED3_PIN, PIN_HIGH);

//        rt_thread_mdelay(500);

//        rt_pin_write(LED3_PIN, PIN_LOW);

//        rt_thread_mdelay(1);

        i++;

        if(i>500)

        {

            i = 0;

        }

        rt_dac_write(dac_device,0,Sine12bit2[i]);

        rt_kprintf("I:%d",i);

    }

}

这里贴下主要代码。主要就是需要初始化外设，然后在调用写值即可，开始调试可以写固定值看有没有输出。综上，开始调试RTT，使用其组件还是很快就能完成任务的。下面看下效果。

同时其也支持串口命令，输入dac即可看到全部命令。也很方便调试功能。

lugl4313820

示波器不错呀，看来楼主是大佬，作品很精彩！

瑞萨CPK-RA6M4 开发板测评+DAC输出正弦波 [复制链接]

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