前言
前面我们配置了ADC模块，本节我们学习配置DAC模块。
! R/ o0 H) W1 L6 e0 e
1.CubeMx的配置步骤
修改之前的ADC的ioc文件来生成工程。


; c& o( K4 n; v. Z5 N6 K  `9 c
9 w% K. ~& N* {7 i& q2.生成工程
2 `7 S5 p+ i1 Y- ]5 ~


: Q1 q4 y& i2 X9 X* Y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。
2 X; T0 O& @& C5 z' `$ M. O

4 X5 q, b* ~7 I7 O6 f
1 }" W8 B5 o: E8 O9 ]5 e
' n1 a# N; t7 q+ r9 O- Z
至此工程就建立完毕了。
/ h7 o+ K* i8 _$ O$ J  Z
$ w' t6 G( o% `) F0 Q
: i; x- W. D, T! O3.测试代码
bdac.h:

1. #ifndef __BDAC_H__
   2 `! x0 k* z8 O; ^
2. #define __BDAC_H__
   
3. 
   
4. #include "main.h"
   : Y5 U$ R* B. C* J' ~6 o/ _6 e. W
5. 
   8 C/ U) ~! A' {/ T
6. void setDAC(DAC_HandleTypeDef *hdac, unsigned int Channel, float Vol);
   / T  z$ M2 J) ]1 d# D$ D
7. 
   
8. #endif
   3 ~& Z, s3 q# ]( E9 Z; v0 n- I* _: i7 ^

复制代码

: c: x( G; d: Q; H5 ^1 U
bdac.c:
8 g+ k. f" f2 [" f! `+ D

1. #include "bdac.h"
   
2. 
   . q% |4 d( M3 d. J6 u6 O1 `
3. void setDAC(DAC_HandleTypeDef *hdac, unsigned int Channel, float Vol)
   / W2 e; N) h1 J- o7 ?, |
4. {
   + ]$ ?$ h, _$ I+ G, y5 f+ o, Z% F
5.         unsigned int temp;
   
6.         temp = (unsigned int)(Vol / 3.3f * 4096);
   % C' @6 E/ m1 T" {
7.         HAL_DAC_SetValue(hdac, Channel, DAC_ALIGN_12B_R, temp);
   8 i  j5 Q8 Q; G
8. }
   

复制代码

main.c:

1. /* USER CODE BEGIN Header */
   
2. /**
   
3.   ******************************************************************************
   , H* v& `) j; C  k) K
4.   * @file           : main.c
   & \, I9 F" a' U( \' e& V; j- c
5.   * @brief          : Main program body
   
6.   ******************************************************************************
   4 D4 ^, B% c1 ^- [8 [0 i* w* Y
7.   * @attention
   
8.   *
   : [. k. p' a  K1 l/ Z. K# A
9.   * <h2><center>© Copyright (c) 2023 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    + L% \9 b5 [1 s6 R! n
11.   *
    
12.   * This software component is licensed by ST under BSD 3-Clause license,
    # f9 k  G2 z7 I/ O5 }
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:
    5 v, M. N6 S, E1 ?( R7 C; q* z
15.   *                        opensource.org/licenses/BSD-3-Clause
    
16.   *
    
17.   ******************************************************************************
    
18.   */
    : g, x6 a  e9 _' t* X, q
19. /* USER CODE END Header */
    , u6 k4 X2 B6 H9 K
20. /* Includes ------------------------------------------------------------------*/
    
21. #include "main.h"
    & G0 b$ q' s9 y8 r9 m8 e& O: S5 S+ Q
22. #include "adc.h"
    
23. #include "dac.h"
    
24. #include "tim.h"
    " s& m& ]# b5 j; B. N2 X
25. #include "gpio.h"
    ! S7 F3 @$ j: g/ F' i) v. d0 T
26. 
    
27. /* Private includes ----------------------------------------------------------*/
    $ F! {% g& ^8 b
28. /* USER CODE BEGIN Includes */
    . O+ M' V3 S( R% c
29. #include "lcd.h"
    & o3 ]  J! e# ^) U0 i
30. #include "badc.h"
    0 P2 q& C5 x$ ]1 i/ m
31. #include "stdio.h"
    0 P% ~2 n4 n# B; D1 q. k9 V) B" c) ]
32. #include "bdac.h"
    
33. /* USER CODE END Includes */
    
34. 
    
35. /* Private typedef -----------------------------------------------------------*/
    - t4 l7 u5 e' p7 R
36. /* USER CODE BEGIN PTD */
    
37. 
    1 l( b( B) q, c) H8 L, ?3 B# }% p, X' y
38. /* USER CODE END PTD */
    , E+ H5 J! A  S: Y" O* p/ u
39. 
    
40. /* Private define ------------------------------------------------------------*/
    
41. /* USER CODE BEGIN PD */
    
42. /* USER CODE END PD */
    6 s% Y: U/ P+ z3 u9 N2 ^/ p, [
43. 
    
44. /* Private macro -------------------------------------------------------------*/
    
45. /* USER CODE BEGIN PM */
    * |$ _& [! _5 g9 [- w2 y0 b
46. 
    
47. /* USER CODE END PM */
    
48. 
    & {" T" B6 R* i8 }
49. /* Private variables ---------------------------------------------------------*/
    2 S% \# O! M7 V1 ~: u
50. 
    2 _2 ?2 F' ?5 Y, r+ U
51. /* USER CODE BEGIN PV */
    
52. float Vol1 = 0;
    
53. /* USER CODE END PV */
    $ {/ h' a' ~% l* N6 i
54. 
    
55. /* Private function prototypes -----------------------------------------------*/
    
56. void SystemClock_Config(void);
    
57. /* USER CODE BEGIN PFP */
    4 e8 v8 h5 A% Z5 G2 ^( R
58. 
    . I4 K+ _: U5 {( B. C) B3 y) e  {3 M
59. /* USER CODE END PFP */
    + i% M8 c7 L. j0 A8 [
60. 
    / S& o9 g! o6 A
61. /* Private user code ---------------------------------------------------------*/
    . N! Y7 T# E  f/ p
62. /* USER CODE BEGIN 0 */
    
63. 
    , Z# t9 n5 R+ J9 n7 _
64. /* USER CODE END 0 */
    
65. 
    , d  b3 ?$ n& c. `" i0 ^
66. /**
    & C4 D" k+ T, h0 j% V
67.   * @brief  The application entry point.
    
68.   * @retval int
    ' I" T; k+ C. X9 a9 c2 c6 _3 l5 J
69.   */
    9 t' \4 {% g: `, z7 E8 O( Q
70. int main(void)
    6 t- V) `2 P4 a* U
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();
    . g, n1 J  w9 m4 }2 P
80. 
      {. G# h5 ~$ b8 k# W
81.   /* USER CODE BEGIN Init */
    % f; q( g% E! s5 h$ ~; P
82. 
    
83.   /* USER CODE END Init */
    & o. K4 A0 a7 l. b. \$ u) u, m
84. 
    ) d1 _& I$ u/ u: c
85.   /* Configure the system clock */
    * \; G! \- V/ f! Y  z1 x* Q
86.   SystemClock_Config();
    9 b2 n/ u; Q$ @) U2 a: j# M
87. 
    
88.   /* USER CODE BEGIN SysInit */
    
89. 
    + o$ g8 u8 t' p& @
90.   /* USER CODE END SysInit */
    
91. 
    + H. D/ o& V9 m& I' o. _
92.   /* Initialize all configured peripherals */
    - B/ l* s- g7 n% b
93.   MX_GPIO_Init();
    % M4 i. u# M% w: l8 j. `" k
94.   MX_TIM3_Init();
    9 i" k8 h# R- p! }' L1 `& M
95.   MX_TIM16_Init();
    / T/ w7 {, d5 @& W% D5 y" R3 h% Y3 e
96.   MX_TIM17_Init();
      _1 J& b% O  O2 M) o$ o' p$ j
97.   MX_ADC1_Init();
    
98.   MX_ADC2_Init();
    
99.   MX_DAC1_Init();
    & ?) [% f. f: v7 E
100.   /* USER CODE BEGIN 2 */
     # f8 g$ V7 `* l: d
101.         LCD_Init();
     $ }( b5 c1 H$ X( `9 @( ]  j5 a
102.         LCD_Clear(Black);
     7 j0 Y4 K/ w& ~, x7 @( e
103.         LCD_SetBackColor(Black);
     
104.         LCD_SetTextColor(White);
     - I( O9 j( }7 H2 H* ~" a; ^$ `
105.         HAL_DAC_Start(&hdac1 , DAC_CHANNEL_1);
     
106.         HAL_DAC_Start(&hdac1 , DAC_CHANNEL_2);
     * K* ]( S% v$ M. T+ y( _
107. 
     
108.         setDAC(&hdac1, DAC_CHANNEL_2, 3.0);
     
109.   /* USER CODE END 2 */
     
110. 
     
111.   /* Infinite loop */
     & c5 H7 m3 x# h6 H; d6 `# M
112.   /* USER CODE BEGIN WHILE */
     
113.   while (1)
     
114.   {
     " R: X% M2 x3 L; ~5 H, n
115.     /* USER CODE END WHILE */
     " w! J! E2 |7 e6 j+ y
116. 
     
117.     /* USER CODE BEGIN 3 */
     
118.                 setDAC(&hdac1, DAC_CHANNEL_1, Vol1);
     - S' J9 h% Y: N6 Q
119.                 char text[30];
     1 i: M: H( R: e2 Y/ ^
120.                 sprintf(text, "    V1:%.2f", getADC(&hadc1));
     
121.                 LCD_DisplayStringLine(Line4, (unsigned char *)text);
     * J! i. F5 ^9 b; `2 ]
122.                 sprintf(text, "    V2:%.2f", getADC(&hadc2));
     
123.                 LCD_DisplayStringLine(Line5, (unsigned char *)text);
     
124.                 Vol1 += 0.1;
     
125.                 if(Vol1 == 3.4)
     0 Z7 Y. Y6 E8 u) D4 x( @$ |/ m: p
126.                 {
     ' C3 N/ R: Q; d4 p
127.                         Vol1 = 0;
     
128.                 }
     ' e& |8 \3 ?8 r( a1 Z# n; W4 @( c# o; M
129.                 HAL_Delay(500);
     . z* @7 G' R9 a& v" q* j. k
130.   }
     7 `' w( ]& t# Y+ \3 U; G8 \* [
131.   /* USER CODE END 3 */
     
132. }
     
133. 
     " ?- m, X9 w: o6 M
134. /**
     
135.   * @brief System Clock Configuration
     
136.   * @retval None
     4 L. y9 F3 S" x
137.   */
     
138. void SystemClock_Config(void)
     " ?) O  V# L" g8 p
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
     % W% C& H! g  g2 {# [; v
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.
     / S  v" S& G, V/ m1 D
149.   */
     ) x# W6 U5 b2 P
150.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
     
151.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
     
152.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     9 v/ M* E/ L' q! d  S
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;
     ) `1 |# c& g' m! v& _
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)
     + s- f# j+ t* x0 Q
160.   {
     
161.     Error_Handler();
     
162.   }
     
163.   /** Initializes the CPU, AHB and APB buses clocks
     
164.   */
     4 g% I4 n( r0 z- G* ]/ G. w1 A
165.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     1 U% s2 O* U" j& K/ w  w( A, {
166.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     . }% _& z2 A! H: o1 Y$ e
167.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
168.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     
169.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
       B. ^: z) S1 B" w9 P2 D. \0 \7 q2 @
170.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     * i2 u6 `; }: ?* g: G4 M
171. 
     
172.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
     
173.   {
     ; J9 {' U6 [, j
174.     Error_Handler();
     
175.   }
     $ Z7 K8 \8 V' y# J) F* W; C. B
176.   /** Initializes the peripherals clocks
     
177.   */
     6 R4 O6 k* I8 w1 F% i) t) M, U
178.   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
     
179.   PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
     
180.   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
       ~2 \- M7 o* Z
181.   {
     
182.     Error_Handler();
     ! p: Z- g& ~+ l; j
183.   }
     & @2 O2 k( ?! h. n
184. }
     8 ]( s& o* o$ b
185. 
     : N. P/ U+ h4 |2 b
186. /* USER CODE BEGIN 4 */
     
187. 
     & [. b9 \7 @6 F9 a, |2 K2 w) t; K/ T/ U
188. /* USER CODE END 4 */
     * B, S5 q6 [' b% p* |, j' l) v2 C
189. 
     5 h* v+ a% {& D; j# M8 l
190. /**
     
191.   * @brief  This function is executed in case of error occurrence.
     : L: y: F7 j" ?/ ~- k8 p7 x
192.   * @retval None
     
193.   */
     
194. void Error_Handler(void)
       }+ ?! V  @% I+ ?: }0 ^
195. {
     ! C3 x  @1 @, `
196.   /* USER CODE BEGIN Error_Handler_Debug */
     5 A& l$ H" I; G: ~7 W
197.   /* User can add his own implementation to report the HAL error return state */
     3 P1 t' f: _/ Z! s" F
198.   __disable_irq();
     
199.   while (1)
     * m( o  g/ w$ `- s1 P2 O
200.   {
     ( [4 b* P2 q* Y
201.   }
     : K9 G7 r' |" R: x$ U
202.   /* USER CODE END Error_Handler_Debug */
     ) d7 Y; b8 l& ^0 s& o& {5 x
203. }
     * b1 f$ A: r4 a7 t1 k, V
204. 
     & {3 m; l/ Y. r* _. c  l
205. #ifdef  USE_FULL_ASSERT
     
206. /**
     5 D! f' S- ?' S  \/ D1 Y9 N
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.   */
     - e2 {8 j0 W! E
213. void assert_failed(uint8_t *file, uint32_t line)
     0 ~' ?5 n% x0 ^; y& }) J" L. K- @
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) */
     / S0 K1 Y# x' o% G; P- ^' Z
218.   /* USER CODE END 6 */
     $ M. }4 o, E  J  L# r" \; }: i' H
219. }
     
220. #endif /* USE_FULL_ASSERT */
     % C# r$ }: j0 o: T. |
221. 
     
222. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     9 g; z+ v8 v( H$ h) O. M. N6 J

复制代码

; _7 W+ X% C, l8 e8 h0 x/ }6 h4.演示效果
1 a5 A; N# c1 g# O, a. T% v4 x


————————————————
版权声明：火花页.