1. 使用 CubeMx 创建 ADC 工程
3 ]. ?- R3 }" f& L8 s# L打开 CubeMx 软件，选中我们此次使用的单片机型号 STM32G030F6P6 ，点击 StartProject.

先配置一下串口，用来打印相关信息
7 N. v. t2 Y1 x+ ~

) ^" _+ g2 ]; F  q5 [0 M9 J
+ z7 V# F# x% I再来配置 ADC
: k, M9 V& \- L  a
# M4 _* k5 C6 e9 t) A

2 H# B+ _' q0 M0 n/ @

配置DMA
$ f$ r- p/ l! J; S% P

9 K$ U+ ~" w9 ?7 d% N: J  R/ `PS：DMA　需要要配置成循环模式，否则只填满一次缓存数组后就停止工作，需要重调用启动 DMA 的函数.

配置时钟

! p7 T/ d- v5 P1 Q! _+ c

5 d2 @3 T' \7 _  ?" s: |ps:本实验使用内部高速时钟，未使用外部晶振，主频设置为最大的64MHZ.
# i: v0 @2 u# Y# M$ M/ X
配置工程相关选项
$ |! Z" D4 a# d) d4 V8 a" n, q2 t+ ^
' i' @  [/ T* C3 g$ s6 y  h8 B

8 Z2 v; B; n# l; L! W
配置完成后点击右上角 GENERATE CODE完成工程的创建
5 N$ d1 K8 U% g: E0 w0 C2 h% z
9 G  v9 {% v" k; f* C6 [- i2. 编程
& e, \$ k3 h2 i2 I' s3 ]- h2.1 串口相关的代码
! Y% T- A" Y% O2 T" N6 N因打印相关信息需要使用 printf ，需要包含 stdio.h 的头文件，且需要重新设 fputc 的函数
" s; a; ]/ d0 q# G# m* w

1. /* Includes ------------------------------------------------------------------*/
   
2. #include "main.h"
   . p  w9 r- f9 J3 L- V  O
3. 
   * z  n' N# s! V
4. /* Private includes ----------------------------------------------------------*/
   
5. /* USER CODE BEGIN Includes */
   
6. #include "stdio.h"
   ) Y6 X6 i- w' I, H6 T0 \* D( b
7. /* USER CODE END Includes */
   
8. 
   1 e/ \* l! G; p1 ~! H: e
9. /* Private typedef -----------------------------------------------------------*/
   
10. /* USER CODE BEGIN PTD */
    
11. 
    
12. /* USER CODE END PTD */
    
13. 
    8 y0 ]  T% N! C; N1 H9 H+ C7 o
14. /* Private define ------------------------------------------------------------*/
    + k( d4 O2 d0 d7 h1 i
15. /* USER CODE BEGIN PD */
    1 |" Q+ n0 ]. k4 P9 E; b: A
16. /* USER CODE END PD */
    9 _8 r* v) A( b6 S7 s" o2 o
17. 
    ! s2 U; Y8 L8 C( U" ~' o
18. /* Private macro -------------------------------------------------------------*/
    # @2 d2 n' `' F: s) c' i/ o
19. /* USER CODE BEGIN PM */
    
20. 
      ~' A6 i8 {: q8 C2 V
21. /* USER CODE END PM */
    8 i' P9 Y+ Y: t: `( }
22. 
    
23. /* Private variables ---------------------------------------------------------*/
    $ ?3 Z, Y6 G2 T2 y$ m& Z, ?
24. ADC_HandleTypeDef hadc1;
    
25. DMA_HandleTypeDef hdma_adc1;
    
26. 
    
27. UART_HandleTypeDef huart1;
    ! j. B$ O! u* @# Q
28. 
    
29. /* USER CODE BEGIN PV */
    0 Q% O8 s' p: m* U1 ~3 |7 I' E
30. 
    
31. /* USER CODE END PV */
    - Q" a1 R$ f0 X5 B- N
32. 
    
33. /* Private function prototypes -----------------------------------------------*/
    $ p; ?1 C6 p; W( q3 ]" y- z
34. void SystemClock_Config(void);
    3 J6 N' l$ x' Q. x1 y
35. static void MX_GPIO_Init(void);
    / F/ P' g  h$ A# G% y
36. static void MX_DMA_Init(void);
    4 s4 X9 H' o- z' J
37. static void MX_ADC1_Init(void);
    
38. static void MX_USART1_UART_Init(void);
    
39. /* USER CODE BEGIN PFP */
    
40. 
    
41. /* USER CODE END PFP */
    - l& `+ \3 n! S( D4 |" O
42. 
    
43. /* Private user code ---------------------------------------------------------*/
    
44. /* USER CODE BEGIN 0 */
    
45. __IO uint16_t adcCovValueBuff[30][2] = {0};        //存放ADC的值 2通道  每个通道存放30个值，由DMA循环写入
    7 {, Q; O) u/ Q. `2 ?& U' O
46. uint16_t adcAverageBuff[2] = {0};        //对每个通道30个ADC值取平均值
    & Z9 l, l' B( j) P
47. 
    
48. 
    8 ]& P) H" C" u  J* n( r9 {% F6 V
49. #ifdef __GNUC_
    4 g* F: e0 E4 V5 ?% a; ?
50. #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
    , C3 J) ^7 `; o& Y1 l, H; K
51. #else
    
52. #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
    & _' _. ^0 Z2 ^1 k$ i3 o7 y
53. #endif
    
54. PUTCHAR_PROTOTYPE
    - Z2 I% O1 e1 T1 R
55. {
    ' g! C5 E1 c6 E0 `) C; h. x/ d
56.     HAL_UART_Transmit(&huart1, (uint8_t*)&ch, 1, 0xFFFF);
    ! P/ Q/ k- E5 k% a
57. 
    6 G  Z0 ~9 s( U: H! d
58.     return ch;
    : P4 N" Z% D2 J! L
59. }
    
60. 
    + V5 X, X% O2 O2 f  m; U3 L( ~
61. /* USER CODE END 0 */

复制代码

* G# O6 \. l* C
2.2 main 函数
! w8 ]" t" P, a' W2 ^

1. /**
   2 m/ Y9 A* N, ]
2.   * @brief  The application entry point.
   
3.   * @retval int
   
4.   */
   7 w* A, i$ `3 Z
5. int main(void)
   
6. {
     G" ~. C- z" \0 ^! P; o6 O0 U' i
7.     /* USER CODE BEGIN 1 */
   4 r0 h; @7 _6 Z$ I1 I
8.     float votage = 0;
   
9.     uint32_t sum = 0;
   5 e1 E7 G. B* _. i# c( f
10.     /* USER CODE END 1 */
    
11. 
    
12.     /* MCU Configuration--------------------------------------------------------*/
    
13. 
    
14.     /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    " i) W# i9 @! s1 X9 x! q
15.     HAL_Init();
    
16. 
    
17.     /* USER CODE BEGIN Init */
    % M/ d9 J2 Z8 r4 B
18. 
    6 G6 E8 E8 p7 N! f5 d
19.     /* USER CODE END Init */
    
20. 
    . L1 ~5 G9 h+ d, f
21.     /* Configure the system clock */
    6 |1 G# ?4 c. r8 S: x8 I" q! m1 a
22.     SystemClock_Config();
    
23. 
    0 O- |, E# o- _  c2 ?
24.     /* USER CODE BEGIN SysInit */
    
25. 
    
26.     /* USER CODE END SysInit */
    % r9 F" g/ \" {' H1 F+ h4 n
27. 
    $ ~+ F  I+ T0 Y" r. C1 }+ r$ n0 n
28.     /* Initialize all configured peripherals */
    
29.     MX_GPIO_Init();
    
30.     MX_DMA_Init();
    
31.     MX_ADC1_Init();
    
32.     MX_USART1_UART_Init();
    ( ^# f8 u' {2 a- T) \
33.     /* USER CODE BEGIN 2 */
    
34.     printf("stm32g030f6 adc demo...... \n");
    1 c; B$ E8 o, ]' H: Y
35.     HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adcCovValueBuff, 60);
    3 T/ q5 ]4 V& L% S8 A) v/ N1 y% }
36.     /* USER CODE END 2 */
    / Z# j3 J% ]9 C# p/ I
37. 
    + K- Y6 d1 y$ D* F$ u; i3 s
38.     /* Infinite loop */
    * M; g! u" _1 ]0 E4 M; J. u
39.     /* USER CODE BEGIN WHILE */
    
40.     while(1)
    4 j* T# e) G* Q0 B2 t
41.     {
    ' S, y, ]% s+ W6 w& `/ G1 m. G9 F
42.         for(uint8_t i = 0; i < 2; i++)
    
43.         {
    
44.             for(uint8_t count = 0; count < 30; count++)
    ) F8 a& B( `! _3 a
45.             {
    % K+ b2 |  X1 L% ?, y3 @
46.                 sum += adcCovValueBuff[count];
    
47.             }
    7 C3 r* |9 X* _" H( I/ s4 a( T7 y. U9 ~" u
48.             adcAverageBuff = sum / 30;
    4 o- P  R2 h+ a8 S2 s0 ]+ T7 n
49.             sum = 0;
    
50.         }
    . [5 m: k, Y7 q
51. 
    1 k2 \2 b- k+ {; L8 `% L, L
52.         printf("---------------------------------------- \n");
    
53.         printf("ADC Channel01 Value:0x%04X \n", adcAverageBuff[0]);
    & Y7 f7 X, p% B: U/ P1 _* K
54.         votage = (float) adcAverageBuff[0] / 4096 * (float)3.3;
    
55.         printf("ADC Channel01 Voltage:%f V \n", votage);
    
56.         printf("ADC Channel02 Value:0x%04X \n", adcAverageBuff[1]);
    
57.         votage = (float) adcAverageBuff[1] / 4096 * (float)3.3;
    5 N( t( w/ ]  m' j1 R2 B
58.         printf("ADC Channel02 Voltage:%f V \n", votage);
    ( k; Q: e% a7 ^+ p/ g$ U! M
59.         printf("---------------------------------------- \n");
    
60.         HAL_Delay(1000);
    - ~$ K# {% `2 J! t* t* Q
61.         /* USER CODE END WHILE */
    
62. 
    
63.         /* USER CODE BEGIN 3 */
    
64.     }
    ' K* L+ C- ~! M& {
65.     /* USER CODE END 3 */
    * g  |- Y/ d' T- m
66. }

复制代码

( D9 v) M4 n8 w6 f+ K2.3 外设的初始化函数
外设的初始化函数都是由 CubeMx 生成的，因为我们只用 DMA 搬运数据，未使用 DMA　的中断功能，故初始化　DMA　时可将中断配置函数注释。

1. /**
   
2.   * @brief ADC1 Initialization Function
   
3.   * @param None
   8 Y3 t" Y& k6 G7 x; x& S( b
4.   * @retval None
   ! r8 Y4 j6 s8 Q7 o
5.   */
   2 o4 A) z4 q( {
6. static void MX_ADC1_Init(void)
   
7. {
   % a! ~7 A/ y" s% y& d& J  M/ h8 t
8. 
   
9.     /* USER CODE BEGIN ADC1_Init 0 */
   
10. 
    
11.     /* USER CODE END ADC1_Init 0 */
    
12. 
    , E- h! c( F. i' V
13.     ADC_ChannelConfTypeDef sConfig = {0};
    
14. 
    2 t  J* S" _5 O1 t
15.     /* USER CODE BEGIN ADC1_Init 1 */
    
16. 
    ' n3 J6 @( t! l5 B# c
17.     /* USER CODE END ADC1_Init 1 */
    
18.     /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
    
19.     */
    
20.     hadc1.Instance = ADC1;
    9 f  O- }1 t' {+ ]
21.     hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
    % Y0 ]. \6 _4 p2 C4 ^
22.     hadc1.Init.Resolution = ADC_RESOLUTION_12B;
    
23.     hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    * `3 ?9 w% k2 E$ |4 a7 i2 [
24.     hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
    
25.     hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
    * o0 M! Z* y& d
26.     hadc1.Init.LowPowerAutoWait = DISABLE;
    
27.     hadc1.Init.LowPowerAutoPowerOff = DISABLE;
    
28.     hadc1.Init.ContinuousConvMode = ENABLE;
    * h' M7 L7 @( y. T$ X
29.     hadc1.Init.NbrOfConversion = 2;
    ; O. [/ e0 }! M! ]4 B* R; l( y
30.     hadc1.Init.DiscontinuousConvMode = DISABLE;
    
31.     hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    $ S% ]) x& m; J% `
32.     hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
    . @2 w) B: E+ {, f
33.     hadc1.Init.DMAContinuousRequests = ENABLE;
    ; d/ k% A+ {/ ^7 D7 }* @. l
34.     hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
    , @; i. T+ x/ h2 p2 ?& c& o  K) u
35.     hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_12CYCLES_5;
    
36.     hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_12CYCLES_5;
    
37.     hadc1.Init.OversamplingMode = DISABLE;
    
38.     hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
    6 l: N( j1 H7 H/ _: t- U0 x$ g
39.     if(HAL_ADC_Init(&hadc1) != HAL_OK)
    
40.     {
    3 N7 y4 X4 p/ U6 U# P
41.         Error_Handler();
    7 K5 d0 s, e+ O0 c5 Y
42.     }
    
43.     /** Configure Regular Channel
    # `! K2 |( R: r+ S  G
44.     */
      B1 {6 r) h, V4 M
45.     sConfig.Channel = ADC_CHANNEL_7;
    
46.     sConfig.Rank = ADC_REGULAR_RANK_1;
    
47.     sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
    6 a$ L* y4 f  @3 Y) Z' o
48.     if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
    ' a/ O7 O# \+ D
49.     {
    ; A3 f, @7 v" V6 B3 g$ {) Y
50.         Error_Handler();
    
51.     }
    : i7 T9 w' \2 l! s
52.     /** Configure Regular Channel
    
53.     */
    
54.     sConfig.Channel = ADC_CHANNEL_8;
    
55.     sConfig.Rank = ADC_REGULAR_RANK_2;
    
56.     sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2;
    4 C  ?% z: {  |8 C( V: `5 t; P# @
57.     if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
    
58.     {
    ( Q' N, E& u) \- W/ s# X2 y! u
59.         Error_Handler();
    & b) {, z" q. z9 e* n( x
60.     }
    
61.     /* USER CODE BEGIN ADC1_Init 2 */
    ' }7 @" Y. u* O; r2 }1 p) M
62. 
    
63.     /* USER CODE END ADC1_Init 2 */
    
64. 
    % a! x0 B1 I# y$ x8 C2 v7 z
65. }
    
66. 
    
67. /**
    " L9 [' B; u# T: _1 d5 z, i
68.   * @brief USART1 Initialization Function
    
69.   * @param None
    
70.   * @retval None
    
71.   */
    : U! k, m3 ~# d& `* ~2 j5 t
72. static void MX_USART1_UART_Init(void)
    
73. {
    
74. 
    
75.     /* USER CODE BEGIN USART1_Init 0 */
    
76. 
    ! _7 B9 K3 O1 g( t9 G
77.     /* USER CODE END USART1_Init 0 */
    # k. q  y+ Q1 m6 D4 E) m9 G. l5 l1 ^
78. 
    9 _2 X/ ?. s# F' T0 }
79.     /* USER CODE BEGIN USART1_Init 1 */
    
80. 
    
81.     /* USER CODE END USART1_Init 1 */
    
82.     huart1.Instance = USART1;
    
83.     huart1.Init.BaudRate = 115200;
    
84.     huart1.Init.WordLength = UART_WORDLENGTH_8B;
    
85.     huart1.Init.StopBits = UART_STOPBITS_1;
    # Y2 G; W7 T6 {
86.     huart1.Init.Parity = UART_PARITY_NONE;
    / d! P0 a8 K  Q$ I! l3 ?  Z; F
87.     huart1.Init.Mode = UART_MODE_TX_RX;
    
88.     huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    
89.     huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    
90.     huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
    / s9 u: c9 k- [& s* ~! Y( I% p
91.     huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
    
92.     huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    
93.     if(HAL_UART_Init(&huart1) != HAL_OK)
    ) f# _+ E: X2 O) \3 Y/ H9 L
94.     {
    - G8 m; z# M2 p+ W8 i
95.         Error_Handler();
    
96.     }
    7 i( R- T% M( D; a, O
97.     if(HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
      @1 ~1 M( V/ o. b2 ~. T
98.     {
    
99.         Error_Handler();
    
100.     }
     0 @) i, m  A! l0 |
101.     if(HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
     
102.     {
     # s/ F% U$ E) ?1 N) v6 T5 P
103.         Error_Handler();
     
104.     }
     + j9 ~& Q+ M) B. F) i7 i1 T; S3 S
105.     if(HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
     
106.     {
     4 @) i+ C; `4 h
107.         Error_Handler();
     , w) T' V  [+ Z& Y+ ~* ?/ B8 n  X
108.     }
     
109.     /* USER CODE BEGIN USART1_Init 2 */
     7 R0 k6 E. s+ z
110. 
     8 a1 B5 I; V9 \, b0 Y
111.     /* USER CODE END USART1_Init 2 */
     # h0 z3 j1 h1 w' j" r6 s! P0 ]% T
112. 
     1 Q( y0 F5 l3 T' q  j
113. }
     
114. 
     % G4 O$ B  z! e
115. /**
     : I$ ~2 {4 x) K/ E
116.   * Enable DMA controller clock
     
117.   */
     7 q, W* ^0 A- |+ D
118. static void MX_DMA_Init(void)
     5 P% n+ o8 w) h6 l" {& Q
119. {
     ! m" S' S' ]; l- d2 i: s, Y
120. 
     
121.     /* DMA controller clock enable */
     
122.     __HAL_RCC_DMA1_CLK_ENABLE();
     
123. 
     
124.     /* DMA interrupt init */
     
125.     /* DMA1_Channel1_IRQn interrupt configuration */
     " r; y8 o6 ~6 C( [
126. 
     4 ]6 X' M, l2 d5 t) _! o7 W
127.     //HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);　//未使用中断功能，故注释　
     8 q) O" d. ^1 S. u; a' z0 R
128.     //HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
     : l: N! F' ^' s' b+ F/ L7 b
129. 
     
130. }
     ( Q  X6 U' C6 A
131. 
     / t2 R( f1 k: j" b
132. /**
     
133.   * @brief GPIO Initialization Function
     & a5 Q# K3 u/ @& F9 z; ]+ v
134.   * @param None
     : X! b+ i; j( Y" ]* f; j8 f
135.   * @retval None
     
136.   */
     : K- M# t$ N# ]: D4 r
137. static void MX_GPIO_Init(void)
     
138. {
     
139. 
     / n9 F8 }2 r& X2 W& m2 F
140.     /* GPIO Ports Clock Enable */
     % v. k/ K  i3 a9 d2 w
141.     __HAL_RCC_GPIOB_CLK_ENABLE();
     
142.     __HAL_RCC_GPIOA_CLK_ENABLE();
     
143. 
     
144. }

复制代码

( Q/ z. M4 S5 d$ F% y
3. 实验现象
! F# N  r: T" N编译并将程序下载到开发板中,连接串口助手并打开；
( t2 G3 ?* W8 {) A# B$ [1 g实验现象：每秒打印一次当前两个通道的　ADC　值及换算后的电压.
% C; B7 {  e4 f) o# J2 K1 D
4 k- N5 I6 u$ B. J" n" B4 R