1. 使用 CubeMx 创建 ADC 工程: i* I0 p1 |; C0 l
打开 CubeMx 软件,选中我们此次使用的单片机型号 STM32G030F6P6 ,点击 StartProject.
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先配置一下串口,用来打印相关信息
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再来配置 ADC
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配置DMA( _( b+ s* e1 K7 F2 C- r
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J& \" T. l1 `) t; N/ xPS: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.
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( Z; B! k5 j# A; Q9 Q% ^5 x B配置时钟; F2 ^* T8 B7 k. o
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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.
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配置工程相关选项
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配置完成后点击右上角 GENERATE CODE完成工程的创建5 t4 h v9 Y$ Q3 G2 B
; B& E7 |1 ~* e, X5 ?. X; i2. 编程
; I$ l9 |( F) z! Y2.1 串口相关的代码5 X# B7 s% ^7 X9 h! J8 m; d
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6 c4 x! t" h4 r* ]& k, X3 k
- /* Includes ------------------------------------------------------------------*/ ?4 R- ~& Q; T- v- R' ^9 q
- #include "main.h") Z, ~) s2 p; \% j; j# Y; X
7 t3 d+ L# z% k; ?3 ~7 y- /* Private includes ----------------------------------------------------------*/( a0 l: a |; b3 @7 x7 `2 N$ ^
- /* USER CODE BEGIN Includes */$ a" e. }7 h9 O4 i Q
- #include "stdio.h"
2 R m8 k/ F+ o, W6 \ - /* USER CODE END Includes */
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2 ]# l/ Y M% D: c) s- h2 {- /* Private typedef -----------------------------------------------------------*/" w* Z; M \: f, |1 d+ L- J+ @
- /* USER CODE BEGIN PTD */3 E/ Q8 h9 |3 D* u0 q
- % a. x; J) M+ Z1 K4 @% s$ ]
- /* USER CODE END PTD */
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4 H, Q9 n! c, n5 X. \- /* Private define ------------------------------------------------------------*/, M+ S2 }! y/ G' A: M/ G
- /* USER CODE BEGIN PD */
; {1 S% m* m0 a; W - /* USER CODE END PD */
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- /* Private macro -------------------------------------------------------------*/
0 a* J% F1 E1 p/ n6 y7 O6 z - /* USER CODE BEGIN PM */8 g ]9 ?. E! E6 y- i3 T
- 0 T+ C7 P6 U. R2 Z: F. q
- /* USER CODE END PM */$ o# F6 I$ _2 T3 q) M
2 b8 c! m$ Y" y# g5 D- /* Private variables ---------------------------------------------------------*/) J* O- S/ U/ c `' E
- ADC_HandleTypeDef hadc1;
; p( |0 H& W& i( _% Z - DMA_HandleTypeDef hdma_adc1;
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# Q( t' c2 l: d. r4 F: P. `6 s- UART_HandleTypeDef huart1;: B6 f% M% B" m o* @
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- /* USER CODE BEGIN PV */
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4 u! W6 w0 E+ s5 I- /* USER CODE END PV */
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- /* Private function prototypes -----------------------------------------------*/6 [, y6 Z7 p- l) o
- void SystemClock_Config(void);5 J1 H1 O; I6 {+ Y$ u& B
- static void MX_GPIO_Init(void);6 [7 n6 u8 U2 M* v
- static void MX_DMA_Init(void);
/ L) O0 k2 S* _$ }5 A+ _ - static void MX_ADC1_Init(void);% @3 a) y c2 d8 [& v4 k# L9 o* w
- static void MX_USART1_UART_Init(void);, g# V, z) E- i, e
- /* USER CODE BEGIN PFP */
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5 }& W9 _1 ~/ s7 i- /* USER CODE END PFP */5 _' q, P; o P/ u
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- /* Private user code ---------------------------------------------------------*/
0 ^' q, N1 N# x# h2 D: M. m - /* USER CODE BEGIN 0 */
: J8 b) y8 f/ e" f" h! H9 A - __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! P: Y( F# H& }5 h% [9 O
- uint16_t adcAverageBuff[2] = {0}; //对每个通道30个ADC值取平均值# w; P% a$ {. V2 G3 }
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2 f+ G) }8 k6 a, ~ q5 ?, v- #ifdef __GNUC_
) v( g' d" D, m6 E - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
, L; g/ g, Q3 s6 _: g - #else
( u1 J+ P2 E8 ^9 |( k! s- Z0 l - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)* ?9 N9 D# h: @( q+ C
- #endif/ _! P' O3 t. N3 G6 r! p5 |
- PUTCHAR_PROTOTYPE& ^# ?% y6 \, d" [6 O0 q; b
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- HAL_UART_Transmit(&huart1, (uint8_t*)&ch, 1, 0xFFFF);: V6 Q: Z9 M2 @1 s$ k$ f- ?' g7 m2 ^
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- return ch;
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2 z$ T6 j5 u; Q. H5 h- /* USER CODE END 0 */
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2.2 main 函数
4 ~( F: [* k$ ?6 c4 ?1 ^' I, B, L- /**
3 w& j' v2 a; t0 b2 R: W - * @brief The application entry point.
* W* j1 A# {2 K' Z+ d - * @retval int( x1 y" A/ K' C/ U2 M! {8 E1 D
- */: S" }* ]2 Z% d, g
- int main(void)
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- /* USER CODE BEGIN 1 */; Y- x" [$ g' B* S; g( l' e
- float votage = 0;
3 H6 z7 t; s: @' q5 M, I4 ` - uint32_t sum = 0;6 F& Y) Y! |# M! V/ w
- /* USER CODE END 1 */+ P7 a* W2 r5 b2 \
+ p) }' n, y0 J4 b" K- G' z- /* MCU Configuration--------------------------------------------------------*/
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4 K6 r: N& B$ t1 |7 \4 n3 z% J- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
% H' U- c: Y1 t* y A& | - HAL_Init();6 q7 ]+ L) A; b- \, Y* M& g
- M- w/ U- Y0 L8 h4 _6 c- /* USER CODE BEGIN Init *// W) v4 M+ V6 ~. x
. r; U+ E3 }( G- /* USER CODE END Init */
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- /* Configure the system clock */3 l+ e3 W) u- K" F4 p" \
- SystemClock_Config();1 \7 P' m6 N: p. m) a& o
! T! K6 H2 Q$ n& N- /* USER CODE BEGIN SysInit */. Z6 Y- k6 m$ E! e6 l3 q
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- /* USER CODE END SysInit */7 O* _9 N: V3 l* ^) D) _9 L3 t6 R; x Y
, G) n4 h: q( W8 ]. p5 @; b/ M- /* Initialize all configured peripherals */6 C1 H0 p" G; }
- MX_GPIO_Init();
% |& F" v8 U0 v2 p: M - MX_DMA_Init();
! X5 ?4 H o# \& k5 a& v - MX_ADC1_Init();
* M1 H) @7 S' p- x4 l4 A+ X1 E - MX_USART1_UART_Init();
' M l+ P6 t1 p5 t# V) D9 Y - /* USER CODE BEGIN 2 */8 i: s+ S1 U3 L( V! u
- printf("stm32g030f6 adc demo...... \n");
4 o) e. n; C8 e8 p' E! E0 G - HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adcCovValueBuff, 60);
+ Y2 a. [; a/ A/ E - /* USER CODE END 2 */
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( W" X; O6 D" {6 j5 D# p; b7 r- /* Infinite loop */
9 i$ L& C: z! A& {. i+ A) z - /* USER CODE BEGIN WHILE */) R) g( U/ v4 C7 V
- while(1)
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- for(uint8_t i = 0; i < 2; i++)
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; }, M8 f3 X6 O/ }8 N - for(uint8_t count = 0; count < 30; count++)
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/ L& B5 t5 x% S' L$ I - sum += adcCovValueBuff[count];. s3 V \/ m1 i9 B% W1 s6 c3 O
- }
+ A4 v* K8 Z5 s3 v3 ~1 l - adcAverageBuff = sum / 30;, t* I: \+ A ?8 w z: ?
- sum = 0;
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! ~ C. [) n) K4 w' n- printf("---------------------------------------- \n");
+ E* k' Z8 S, {' M4 e4 | - printf("ADC Channel01 Value:0x%04X \n", adcAverageBuff[0]);* } V& \& E. w2 Y# X9 H0 Y
- votage = (float) adcAverageBuff[0] / 4096 * (float)3.3;9 [8 j( A- `! l
- printf("ADC Channel01 Voltage:%f V \n", votage);
5 |6 N: ^+ g* W9 ]$ v7 B) n - printf("ADC Channel02 Value:0x%04X \n", adcAverageBuff[1]);+ E1 Z+ V1 q! L- s8 e
- votage = (float) adcAverageBuff[1] / 4096 * (float)3.3;2 B4 w9 i" l1 Z/ W; ^$ f
- printf("ADC Channel02 Voltage:%f V \n", votage);9 z& ^0 p% a. C3 s! i
- printf("---------------------------------------- \n");
# L1 }. a& c- y7 W( w - HAL_Delay(1000);! Z+ Q/ h( a; f9 d
- /* USER CODE END WHILE */9 C) Y, n! ^# ?1 X$ a5 _ s
3 J* c! m9 k% D" N- /* USER CODE BEGIN 3 */
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- /* USER CODE END 3 */! N; H& g$ n+ X0 [/ ]" L3 l$ E
- }
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) S$ p6 P4 ]! o1 g. G% o2.3 外设的初始化函数, M" D3 F1 Z- E/ @/ {- V. T
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。
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- /**5 }2 _+ |# p+ x$ ~: [6 ~" v
- * @brief ADC1 Initialization Function
$ b% i7 o$ ~ L5 ]7 v% H7 a - * @param None
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- static void MX_ADC1_Init(void)9 w& U- u$ l3 R
- {
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( |, j" n9 E% H; m: u: H- /* USER CODE BEGIN ADC1_Init 0 */
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: x2 J/ w8 r( [8 ~0 `- /* USER CODE END ADC1_Init 0 */
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' V. l3 S8 E$ D6 {* u3 o- ADC_ChannelConfTypeDef sConfig = {0};( R+ @. c( G l2 g- i
, y9 e' N& Q, } H) X& M- B, O- /* USER CODE BEGIN ADC1_Init 1 */
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- /* USER CODE END ADC1_Init 1 *// e B2 N; h# K9 z
- /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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- hadc1.Instance = ADC1;# y4 J+ G! S2 H: Z) a
- hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;& q" I* M4 V# f5 k2 [/ Y
- hadc1.Init.Resolution = ADC_RESOLUTION_12B;
6 N& \% m1 s) b% d( a - hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;' ^1 g: y# o% s% e* r8 c2 L0 O
- hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;$ l, k- c0 T& z% D" H
- hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;3 \. ^% E; P# \0 D
- hadc1.Init.LowPowerAutoWait = DISABLE;
6 z" {5 ?4 d: X2 b) S - hadc1.Init.LowPowerAutoPowerOff = DISABLE;
, t- Y* i- |1 H: M* { - hadc1.Init.ContinuousConvMode = ENABLE;
% w1 O" q0 g- t8 S - hadc1.Init.NbrOfConversion = 2;
3 B8 f: r, d9 C/ a6 x. d - hadc1.Init.DiscontinuousConvMode = DISABLE;
% q9 d' y4 C+ X) ~ - hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;; m& @& m- c! q, ?% E+ w( I
- hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
$ R9 a `% Y; v+ x; W - hadc1.Init.DMAContinuousRequests = ENABLE;
" c0 @( e- Z' [ h - hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
% Q4 C; \! Y M, W/ `+ s+ H - hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_12CYCLES_5;; H6 z+ U) ^; I) _' g5 H
- hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_12CYCLES_5;( x2 I/ O8 v: C% o
- hadc1.Init.OversamplingMode = DISABLE;0 P0 c7 M6 `' v
- hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;. T& v$ ]# d: x- g7 V
- if(HAL_ADC_Init(&hadc1) != HAL_OK)( O' z. I; c N
- {
2 C. w: E% d& ~- \ - Error_Handler();
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( U" |* A% K) @! d7 w9 k7 _7 n - /** Configure Regular Channel
2 t" u: ]5 d9 x& c% b - */! |9 p/ f. N: p3 Y# z2 S! c
- sConfig.Channel = ADC_CHANNEL_7;" v& g( F4 a8 {: c, w$ Q# D1 g
- sConfig.Rank = ADC_REGULAR_RANK_1;' [# k8 c: w/ i; u. s" Y7 h5 V
- sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;' b+ i" e2 B! t4 ?: t" h! j
- if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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- Error_Handler();
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- /** Configure Regular Channel( Q5 D9 k$ U8 a# e, Z
- */
2 C% s& I/ T$ h' g; O5 C. R - sConfig.Channel = ADC_CHANNEL_8;
( C1 y3 t1 p/ D. j" F# Z! |4 L+ M& \ - sConfig.Rank = ADC_REGULAR_RANK_2;
' _6 Q* `% Y* n$ |) r - sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2;; v9 Z# g# O- ]
- if(HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)4 d, ?* ?3 j* R) L$ k7 G* T( I* b$ |+ [- o( l
- {
7 A4 ^: } B U- K - Error_Handler();, Y* U* G4 \0 y0 I: s8 O
- }
+ X7 M/ Q( B3 K8 P7 W3 ? - /* USER CODE BEGIN ADC1_Init 2 */. Y( x. {1 [% t9 }. q1 Q8 s
) ]2 \" c E$ @) @+ Y1 c* s- /* USER CODE END ADC1_Init 2 */
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' G6 p) E8 u3 a' `1 D* a! h8 K- /**" [; T* n3 r3 E7 o: M
- * @brief USART1 Initialization Function
y; G. ^% w& R3 r9 i4 V - * @param None5 F% X0 e$ B. C( ?6 L" Q
- * @retval None
0 s3 w: ?1 ?& [! p - */# C# X' x3 I2 S1 ^
- static void MX_USART1_UART_Init(void)
' I J" i9 w9 n2 g7 W - {
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1 \4 i1 j1 }) f% E- /* USER CODE BEGIN USART1_Init 0 */6 q6 {9 i' c% D3 w- M) F3 J
5 p9 w+ [! }* b) P8 ?- /* USER CODE END USART1_Init 0 */; ^+ L' y8 L" T: \0 J1 U& \7 r
9 ]) t n, p7 }0 d$ @+ n* k7 U: d" Y- /* USER CODE BEGIN USART1_Init 1 */
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- /* USER CODE END USART1_Init 1 */1 O" f# E. T7 W
- huart1.Instance = USART1;( C7 W+ |. k! O
- huart1.Init.BaudRate = 115200;6 Q6 |6 t; t$ X, i8 o& d
- huart1.Init.WordLength = UART_WORDLENGTH_8B;
8 P8 v$ N! f" t+ [ - huart1.Init.StopBits = UART_STOPBITS_1;
: y5 p+ B4 o }8 ~9 e* N - huart1.Init.Parity = UART_PARITY_NONE;
) D) j& A$ g5 ]/ r! } - huart1.Init.Mode = UART_MODE_TX_RX;
" F/ A( y3 S; e# k - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
* v) r% ?: Q6 W7 G- R - huart1.Init.OverSampling = UART_OVERSAMPLING_16;
* g4 R; Z. U" D - huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;+ W- }7 n5 R+ q% C8 J2 r
- huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;+ O& k+ f4 k; ^ K; i! A
- huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;" \2 W/ N+ ^4 C1 t/ ]
- if(HAL_UART_Init(&huart1) != HAL_OK)8 Q& s- z/ I8 D* L7 Z' X' R* w
- {
% T0 P! N5 H; W4 Q# d; c+ s0 p - Error_Handler();
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7 M) m% a$ |) J - if(HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)( r8 t% |% P9 ^
- {+ ` m0 x; L0 M/ t$ T6 W
- Error_Handler();
# ?5 j# J: j9 F6 ^ - }
) U. [$ e. c- s) \* x/ e4 Y - if(HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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- Error_Handler();
- s3 Z8 M# F4 r - }
- l3 D/ G' m% ?. [: G6 J. z - if(HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)" ~7 n8 I s9 \1 }8 C9 k% x. U
- {' _0 g- A9 S9 t* w1 M
- Error_Handler();
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^+ j$ j) x7 @0 _3 } - /* USER CODE BEGIN USART1_Init 2 */
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- /* USER CODE END USART1_Init 2 */# u$ c6 H# Z0 y; Y/ X" C
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/ q' A" p0 V+ w) M; j- Y" I) m- /**
' ]" u( m5 x( ?. ]& ^4 }! l - * Enable DMA controller clock! w; i( O+ ?: V3 @
- */& }( p6 Z P0 _* X3 V8 V R; M9 N
- static void MX_DMA_Init(void)
! {( h5 r- @. m8 O% T3 g/ `3 }6 f: a - {5 d9 Q7 {2 e, Z: {/ ]* ~
- ' w" E& V5 L9 S& t
- /* DMA controller clock enable */+ q- `, d# Z5 n6 m, f! j4 b
- __HAL_RCC_DMA1_CLK_ENABLE();
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- /* DMA interrupt init */' T, p+ B1 \! Y8 L0 R
- /* DMA1_Channel1_IRQn interrupt configuration */
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9 |4 X) c; {) l- //HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0); //未使用中断功能,故注释 , K3 K; l; ~, Q, k9 K
- //HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);8 v9 r6 r2 V" r
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- }
0 n. R3 f% n" }
+ g5 ~8 c8 M8 s! w; w9 v- /**
5 x; r/ @5 }) x4 t: i" |+ V2 W- ~7 k - * @brief GPIO Initialization Function9 R/ c% Z% z6 I0 e8 M1 L
- * @param None
2 ~- S' G% I* z# W/ X0 ~) }$ ^ - * @retval None4 s( i( c2 a* c/ R% l6 l
- */
1 y) @3 Q, ~: P* L - static void MX_GPIO_Init(void)
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- + ~8 [! j# C( Y3 t, ~
- /* GPIO Ports Clock Enable */: F, k) n9 A3 K7 p- m1 u7 Z
- __HAL_RCC_GPIOB_CLK_ENABLE();: z9 j4 | b) @& k: M$ t! A
- __HAL_RCC_GPIOA_CLK_ENABLE();. S" ~4 x Q; s
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3. 实验现象
& o9 z: r1 `5 E/ \) }2 M# n编译并将程序下载到开发板中,连接串口助手并打开;" ~# w% z7 c) |! }) A! T f
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.) Z" a2 y- Q$ J: I
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