前言
前面我们配置了ADC模块，本节我们学习配置DAC模块。

1.CubeMx的配置步骤
修改之前的ADC的ioc文件来生成工程。



2.生成工程



点击GENERATE CODE生成代码，再在bsp文件夹建立bdac.h和bdac.c，并加入工程中。





至此工程就建立完毕了。


3.测试代码
bdac.h:

1. #ifndef __BDAC_H__
   
2. #define __BDAC_H__
   
3. 
   
4. #include "main.h"
   
5. 
   
6. void setDAC(DAC_HandleTypeDef *hdac, unsigned int Channel, float Vol);
   
7. 
   
8. #endif
   

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bdac.c:

1. #include "bdac.h"
   
2. 
   
3. void setDAC(DAC_HandleTypeDef *hdac, unsigned int Channel, float Vol)
   
4. {
   
5.         unsigned int temp;
   
6.         temp = (unsigned int)(Vol / 3.3f * 4096);
   
7.         HAL_DAC_SetValue(hdac, Channel, DAC_ALIGN_12B_R, temp);
   
8. }
   

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main.c:

1. /* USER CODE BEGIN Header */
   
2. /**
   
3.   ******************************************************************************
   
4.   * @file           : main.c
   
5.   * @brief          : Main program body
   
6.   ******************************************************************************
   
7.   * @attention
   
8.   *
   
9.   * <h2><center>© Copyright (c) 2023 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    
11.   *
    
12.   * This software component is licensed by ST under BSD 3-Clause license,
    
13.   * the "License"; You may not use this file except in compliance with the
    
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    
16.   *
    
17.   ******************************************************************************
    
18.   */
    
19. /* USER CODE END Header */
    
20. /* Includes ------------------------------------------------------------------*/
    
21. #include "main.h"
    
22. #include "adc.h"
    
23. #include "dac.h"
    
24. #include "tim.h"
    
25. #include "gpio.h"
    
26. 
    
27. /* Private includes ----------------------------------------------------------*/
    
28. /* USER CODE BEGIN Includes */
    
29. #include "lcd.h"
    
30. #include "badc.h"
    
31. #include "stdio.h"
    
32. #include "bdac.h"
    
33. /* USER CODE END Includes */
    
34. 
    
35. /* Private typedef -----------------------------------------------------------*/
    
36. /* USER CODE BEGIN PTD */
    
37. 
    
38. /* USER CODE END PTD */
    
39. 
    
40. /* Private define ------------------------------------------------------------*/
    
41. /* USER CODE BEGIN PD */
    
42. /* USER CODE END PD */
    
43. 
    
44. /* Private macro -------------------------------------------------------------*/
    
45. /* USER CODE BEGIN PM */
    
46. 
    
47. /* USER CODE END PM */
    
48. 
    
49. /* Private variables ---------------------------------------------------------*/
    
50. 
    
51. /* USER CODE BEGIN PV */
    
52. float Vol1 = 0;
    
53. /* USER CODE END PV */
    
54. 
    
55. /* Private function prototypes -----------------------------------------------*/
    
56. void SystemClock_Config(void);
    
57. /* USER CODE BEGIN PFP */
    
58. 
    
59. /* USER CODE END PFP */
    
60. 
    
61. /* Private user code ---------------------------------------------------------*/
    
62. /* USER CODE BEGIN 0 */
    
63. 
    
64. /* USER CODE END 0 */
    
65. 
    
66. /**
    
67.   * @brief  The application entry point.
    
68.   * @retval int
    
69.   */
    
70. int main(void)
    
71. {
    
72.   /* USER CODE BEGIN 1 */
    
73. 
    
74.   /* USER CODE END 1 */
    
75. 
    
76.   /* MCU Configuration--------------------------------------------------------*/
    
77. 
    
78.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    
79.   HAL_Init();
    
80. 
    
81.   /* USER CODE BEGIN Init */
    
82. 
    
83.   /* USER CODE END Init */
    
84. 
    
85.   /* Configure the system clock */
    
86.   SystemClock_Config();
    
87. 
    
88.   /* USER CODE BEGIN SysInit */
    
89. 
    
90.   /* USER CODE END SysInit */
    
91. 
    
92.   /* Initialize all configured peripherals */
    
93.   MX_GPIO_Init();
    
94.   MX_TIM3_Init();
    
95.   MX_TIM16_Init();
    
96.   MX_TIM17_Init();
    
97.   MX_ADC1_Init();
    
98.   MX_ADC2_Init();
    
99.   MX_DAC1_Init();
    
100.   /* USER CODE BEGIN 2 */
     
101.         LCD_Init();
     
102.         LCD_Clear(Black);
     
103.         LCD_SetBackColor(Black);
     
104.         LCD_SetTextColor(White);
     
105.         HAL_DAC_Start(&hdac1 , DAC_CHANNEL_1);
     
106.         HAL_DAC_Start(&hdac1 , DAC_CHANNEL_2);
     
107. 
     
108.         setDAC(&hdac1, DAC_CHANNEL_2, 3.0);
     
109.   /* USER CODE END 2 */
     
110. 
     
111.   /* Infinite loop */
     
112.   /* USER CODE BEGIN WHILE */
     
113.   while (1)
     
114.   {
     
115.     /* USER CODE END WHILE */
     
116. 
     
117.     /* USER CODE BEGIN 3 */
     
118.                 setDAC(&hdac1, DAC_CHANNEL_1, Vol1);
     
119.                 char text[30];
     
120.                 sprintf(text, "    V1:%.2f", getADC(&hadc1));
     
121.                 LCD_DisplayStringLine(Line4, (unsigned char *)text);
     
122.                 sprintf(text, "    V2:%.2f", getADC(&hadc2));
     
123.                 LCD_DisplayStringLine(Line5, (unsigned char *)text);
     
124.                 Vol1 += 0.1;
     
125.                 if(Vol1 == 3.4)
     
126.                 {
     
127.                         Vol1 = 0;
     
128.                 }
     
129.                 HAL_Delay(500);
     
130.   }
     
131.   /* USER CODE END 3 */
     
132. }
     
133. 
     
134. /**
     
135.   * @brief System Clock Configuration
     
136.   * @retval None
     
137.   */
     
138. void SystemClock_Config(void)
     
139. {
     
140.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     
141.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
     
142.   RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
     
143. 
     
144.   /** Configure the main internal regulator output voltage
     
145.   */
     
146.   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
     
147.   /** Initializes the RCC Oscillators according to the specified parameters
     
148.   * in the RCC_OscInitTypeDef structure.
     
149.   */
     
150.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
     
151.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
     
152.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     
153.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
     
154.   RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV3;
     
155.   RCC_OscInitStruct.PLL.PLLN = 20;
     
156.   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
     
157.   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
     
158.   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
     
159.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
160.   {
     
161.     Error_Handler();
     
162.   }
     
163.   /** Initializes the CPU, AHB and APB buses clocks
     
164.   */
     
165.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     
166.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     
167.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
168.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     
169.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     
170.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     
171. 
     
172.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
     
173.   {
     
174.     Error_Handler();
     
175.   }
     
176.   /** Initializes the peripherals clocks
     
177.   */
     
178.   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
     
179.   PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
     
180.   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
     
181.   {
     
182.     Error_Handler();
     
183.   }
     
184. }
     
185. 
     
186. /* USER CODE BEGIN 4 */
     
187. 
     
188. /* USER CODE END 4 */
     
189. 
     
190. /**
     
191.   * @brief  This function is executed in case of error occurrence.
     
192.   * @retval None
     
193.   */
     
194. void Error_Handler(void)
     
195. {
     
196.   /* USER CODE BEGIN Error_Handler_Debug */
     
197.   /* User can add his own implementation to report the HAL error return state */
     
198.   __disable_irq();
     
199.   while (1)
     
200.   {
     
201.   }
     
202.   /* USER CODE END Error_Handler_Debug */
     
203. }
     
204. 
     
205. #ifdef  USE_FULL_ASSERT
     
206. /**
     
207.   * @brief  Reports the name of the source file and the source line number
     
208.   *         where the assert_param error has occurred.
     
209.   * @param  file: pointer to the source file name
     
210.   * @param  line: assert_param error line source number
     
211.   * @retval None
     
212.   */
     
213. void assert_failed(uint8_t *file, uint32_t line)
     
214. {
     
215.   /* USER CODE BEGIN 6 */
     
216.   /* User can add his own implementation to report the file name and line number,
     
217.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
218.   /* USER CODE END 6 */
     
219. }
     
220. #endif /* USE_FULL_ASSERT */
     
221. 
     
222. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     

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4.演示效果



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