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[STM32F0]

抽奖中了一个F072开发板,分享使用其DAC

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wuxiubo|  楼主 | 2020-10-19 19:59 | 只看该作者 |只看大图 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 wuxiubo 于 2020-10-19 20:00 编辑

上个礼拜有幸参加抽奖中了一块F072的开发板。就是下图:


板子上带有ST-LINK仿真器,不用外接仿真器十分方便。

之后就是在CUBEMX上看其资源,发现居然还带了DAC功能,果断尝试了下。
效果如下:


使用生成代码,在加上一些其他代码就完成了正弦波的输出,然后用示波器测量下即可。
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * [url=home.php?mod=space&uid=288409]@file[/url]           : main.c
  * [url=home.php?mod=space&uid=247401]@brief[/url]          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>© Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dac.h"
#include "dma.h"
#include "tim.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
const uint16_t Sine12bit[100]={
0x0800,0x0881,0x0901,0x0980,0x09FD,0x0A79,0x0AF2,0x0B68,0x0BDA,0x0C49,
0x0CB3,0x0D19,0x0D79,0x0DD4,0x0E29,0x0E78,0x0EC0,0x0F02,0x0F3C,0x0F6F,
0x0F9B,0x0FBF,0x0FDB,0x0FEF,0x0FFB,0x0FFF,0x0FFB,0x0FEF,0x0FDB,0x0FBF,
0x0F9B,0x0F6F,0x0F3C,0x0F02,0x0EC0,0x0E78,0x0E29,0x0DD4,0x0D79,0x0D19,
0x0CB3,0x0C49,0x0BDA,0x0B68,0x0AF2,0x0A79,0x09FD,0x0980,0x0901,0x0881,
0x0800,0x077F,0x06FF,0x0680,0x0603,0x0587,0x050E,0x0498,0x0426,0x03B7,
0x034D,0x02E7,0x0287,0x022C,0x01D7,0x0188,0x0140,0x00FE,0x00C4,0x0091,
0x0065,0x0041,0x0025,0x0011,0x0005,0x0001,0x0005,0x0011,0x0025,0x0041,
0x0065,0x0091,0x00C4,0x00FE,0x0140,0x0188,0x01D7,0x022C,0x0287,0x02E7,
0x034D,0x03B7,0x0426,0x0498,0x050E,0x0587,0x0603,0x0680,0x06FF,0x077F,
};
uint16_t DualSine12bit[100];
/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * [url=home.php?mod=space&uid=247401]@brief[/url]  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
uint32_t Idx;        //定义变量
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_DAC_Init();
  MX_TIM6_Init();
  /* USER CODE BEGIN 2 */
/*读入正弦波数据*/
for (Idx = 0; Idx <100; Idx++)  
        {  
                DualSine12bit[Idx] = (Sine12bit[Idx] << 16)+ (Sine12bit[Idx]);  
        }
        HAL_TIM_Base_Start(&htim6);
    HAL_DAC_Start_DMA(&hdac,DAC_CHANNEL_1,(uint32_t *)DualSine12bit,100,DAC_ALIGN_12B_R);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
添加的代码就几行,非常简单

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沙发
凯复Kane| | 2020-10-19 21:15 | 只看该作者
谢谢分享 自带DAC还是蛮方便的

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板凳
王栋春| | 2020-10-19 21:15 | 只看该作者
波形图上有寄生干扰呀

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地板
wuxiubo|  楼主 | 2020-10-19 22:47 | 只看该作者
王栋春 发表于 2020-10-19 21:15
波形图上有寄生干扰呀

额,这个可能是他DAC的原因

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5
wahahaheihei| | 2020-10-19 23:00 | 只看该作者
真棒,这个板子真给力。

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6
wuxiubo|  楼主 | 2020-10-20 10:50 | 只看该作者
wahahaheihei 发表于 2020-10-19 23:00
真棒,这个板子真给力。

嗯嗯,除了主频低点,外设还是很丰富的。

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