最近为了学习HAL库和熟悉STM32CUBEIDE软件,用手上STM32F407板子做了小工程,里面包含有串口1,串口2的使用,定时器中断,EXTI,DAC输出,ADC的DMA读取和用SPI驱动的TFT彩屏显示。 g+ [ Y) Y5 n
先放一张工程做好的图吧
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程序很简单,用CUBEMX初始化后,只需要自己写回调函数和主函数的部分,先看一下外设的CUBEMX初始化;
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两个串口的初始化是一样的这是设置的NVIC中断不同,后面放出工程的NVIC配置。
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% t6 C4 j% P" o7 r% c% I9 B0 c定时器的配置要多一点,但只用定时器则比较简单
* @* u: }! Y% A3 N1 x7 q! Q8 M(3)ADC6
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- ^, e4 }! _) N7 H- G2 Q! f' `
/ k0 Z0 m4 B U4 K* h" ?ADC的DMA读取设置
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! q" g2 z# `- N8 d5 M(4)DAC1
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" r# o* R( n9 K" o0 }/ A(5)SPI2
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(6)EXTI
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(7)NVIC, B7 u2 T4 W0 ]: H; U3 b
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所有的外设初始化配置完成了;
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: l" z' p7 r( ~, B1 S( z9 Q下面看一下中断相应的回调函数,在HAL库中,写中断处理函数和标准库不同,我个人认为现在只需要在回调函数里写内容就行了,我们看一下HAL库里面的IRQ函数,比如HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)- void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
* G; a; u" s0 d4 p - {- ^, }; c" ?( T, }0 C0 X" G
- /* EXTI line interrupt detected */
* x. r7 P! E. F7 _+ B8 l2 J - if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
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- __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);" b$ J, t4 H( B, M
- HAL_GPIO_EXTI_Callback(GPIO_Pin);8 ^' O. b0 j1 c- l) P w- s
- }
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- 9 r4 C+ j- {7 a. g9 O; S
- /**/ \6 ?4 E! m) h6 l3 ~% M6 o
- * @brief EXTI line detection callbacks.5 n1 u* X& h1 [* O( I1 @1 a4 l% l- G
- * @param GPIO_Pin Specifies the pins connected EXTI line: U) [; }1 ]# }, Z
- * @retval None
: \7 _' b; k: H- _$ n - */. ]# b K/ w3 m4 }& X3 d# h
- __weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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- /* Prevent unused argument(s) compilation warning */& l6 a3 y3 g4 w( i
- UNUSED(GPIO_Pin);
( m \2 r0 [) A) F* [) y - /* NOTE: This function Should not be modified, when the callback is needed,7 z4 ^$ g& Z! q% `& e) c! t
- the HAL_GPIO_EXTI_Callback could be implemented in the user file& d' i# h2 z7 E
- */! ~# N$ h& u5 K% S1 O1 ^
- }
复制代码 HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)里面会调用 HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)函数,而 HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)是需要自己编写。
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(1)串口8 C6 _+ R7 M4 X+ X) E/ V1 w
% \+ \6 X# }7 t- uint8_t RX_buff[RX_len];
) n0 |8 B2 A B/ E - uint8_t RX_temp=0;( N1 R" t4 m# H7 B: G
- uint8_t RX_i=0;: K" R F6 C+ Z/ {" c% H
- uint8_t RX2_temp=0;& p5 d& }" ^ ? P' l
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- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)( A6 f5 I% \" L/ Y
- {- d) u' l+ ^1 S+ Z% h y
- // uint8_t buff[10];
8 Q! j1 z- W2 z% O" D) { - if(huart->Instance==USART1)! m# N4 e( w$ P
- { u5 W% F7 P* i. J
- //HAL_UART_Transmit(&huart1, &RX_temp, 1, 1);
: L1 O, V6 z# Y( x, H1 D: u! O - if(RX_i>=RX_len)! K/ P p8 y q" q% ^5 s9 }9 p
- {' N1 n7 k: p4 x" L' w1 {
- RX_i=0;8 b2 r5 @) \0 y( [
- HAL_UART_Transmit(&huart1, send_buff, sizeof(send_buff), 1);
& ^* F3 y+ a7 W( M; @: \ - memset(RX_buff,0,sizeof(RX_buff));
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- RX_buff[RX_i++]=RX_temp;
! t1 b. l6 {2 r& v `3 a - if((RX_buff[RX_i-1]=='\n')||(RX_buff[RX_i-2]=='\r'))' [1 ]( v! `* o) l& t
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- HAL_UART_Transmit(&huart1, RX_buff, strlen(RX_buff), 10);//Timeout 不能太小,也不能太长+ c u1 K4 J& l
- memset(RX_buff,0,sizeof(RX_buff));
' s; U; @ j2 L6 g: C6 u - RX_i=0;
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- }
* D5 o4 s5 v- G4 t - HAL_UART_Receive_IT(&huart1, &RX_temp, 1);
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) I; z2 |9 `6 M# s0 i5 I- Y- if(huart->Instance==USART2)$ J r( n, Z3 a, a( g
- {: R& {0 R) |$ R8 i+ M9 Y. r
- HAL_UART_Transmit(&huart2, &RX2_temp, 1, 10);
9 t/ r) @8 A8 n! e( O0 ]/ m: | - HAL_UART_Receive_IT(&huart2, &RX2_temp, 1);
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复制代码 (2)TIM3定时器中断
1 e3 c' a2 g! r: u8 I1 D* x- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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- t, W8 w, }/ t! \: y - if(htim->Instance=htim3.Instance)
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- HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);: h/ G* \& A* s+ B. E8 U6 L
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- }
复制代码 (3)EXTI中断
3 B# z2 g9 w6 z( g- void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)2 d E6 S1 S7 p: F7 U' q% [
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- HAL_Delay(100);
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1 ?& B* D' n4 }5 {' b6 L- switch(GPIO_Pin)
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5 g; s& Q2 K5 Y, {# F - case WK_UP_Pin:' h( p, {" \& J) T) H5 c
- if(HAL_GPIO_ReadPin(WK_UP_GPIO_Port,WK_UP_Pin) == 1)! ` j5 Z6 D% X6 @9 z6 J
- {
/ `# c& S/ h$ a2 g; z4 D - HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);
5 k% N' z9 C( W5 m9 g - DAC_Value=3299;
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- break;' N- A' ]0 m6 } Z# G" N
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- case GPIO_PIN_2:
' C% b) t- q& q- }; O0 S% e% q - if(HAL_GPIO_ReadPin(GPIOE,GPIO_PIN_2) == 0)
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6 q3 Q2 I( E% Z/ v" L; `6 [ - HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);
/ B& p( U+ w; @ - if(DAC_Value<3200) DAC_Value+=100;6 W6 U7 G$ E+ K$ w
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- break;7 |0 W, `) r ^+ q# M& h4 w
3 @( i2 ^9 o( w- g5 |, z- case GPIO_PIN_3:% a; Y' f6 c6 t1 ^
- if(HAL_GPIO_ReadPin(GPIOE,GPIO_PIN_3) == 0)
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- HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);$ k, P" Q4 h- b& \8 B! M" t
- if(DAC_Value>=100) DAC_Value-=100;
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+ Y- ^7 x2 i3 ^5 f* v/ d } - break;
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- case GPIO_PIN_4:
: Z4 t- [( @# e* i6 h - if(HAL_GPIO_ReadPin(GPIOE,GPIO_PIN_4) == 0). u# z7 W8 @2 d* a( d5 _
- {- s/ U; Y" Q; p& L. `
- HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);/ Q+ j& t* {- t7 a# K) L6 f( y
- DAC_Value=0;
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% k- p5 d* J7 T1 f3 { - break;
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复制代码 再看一下用SPI往LCD里面写数据的程序
8 P& `1 ~5 {9 I9 a- c# T9 [- uint8_t SPI_WriteByte(uint8_t Byte)& H7 ] {/ @9 v2 v' _
- {
% P0 C a) i. ~& ]4 z" {3 v - HAL_SPI_Transmit(&hspi2, &Byte, sizeof(Byte), 10);- G5 O5 Y/ Z9 g5 K0 \- U( M5 Q
- }
复制代码 下面看一下主函数% j! h7 F3 S7 d. K" k+ _8 a
- int main(void)/ r, E- p8 ~5 b5 r( U1 p% q
- {8 h5 G% D, s0 j8 R
- /* USER CODE BEGIN 1 */
" L0 |9 I- I: L N' V - uint8_t buff[50];
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- /* USER CODE END 1 */" o$ ? Z* z5 k5 q( J
-
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! {: f( ~' O- T5 j$ t7 f- /* MCU Configuration--------------------------------------------------------*/
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, h0 i- [; j$ b- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */+ O* H0 Y' H7 E+ L/ e0 Q* G& f
- HAL_Init();
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- /* USER CODE BEGIN Init */+ E& Q, n3 v+ z& n6 k$ ]$ s
2 y# q! L9 ?! C" I( [3 p- /* USER CODE END Init */( z+ C7 L6 V9 D6 T$ s5 K, `5 E
- ' w' r9 n9 L6 h2 B2 j* a% a9 @& Y
- /* Configure the system clock */$ O2 W7 N+ D8 A5 J) D0 a; F
- SystemClock_Config();
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- /* USER CODE BEGIN SysInit */
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4 B, ^* T% m+ ^, n1 @1 M- /* USER CODE END SysInit */
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- l: N+ |- d/ M- /* Initialize all configured peripherals */" U/ N4 ?/ @7 o6 Q5 P: h1 u
- MX_GPIO_Init();- {* _7 W& m' i
- MX_DMA_Init();
' F7 \$ _/ b9 Z3 H( Y; m: W - MX_USART1_UART_Init();
# H) T6 y w7 A& l - MX_TIM3_Init();. e4 p. p2 R; v7 f5 L* c' h
- MX_ADC1_Init();# I2 @4 v: w2 Z( U/ ^+ S
- MX_DAC_Init();7 g4 B! \- H1 ?( U( {2 |8 Q
- MX_SPI2_Init();
" L* O2 f" W$ z, z7 p% Z7 { - MX_USART2_UART_Init();$ Y. O- Q; I B! C; r' I
- /* USER CODE BEGIN 2 */
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- LCD_Init();$ p7 P. I; \% @7 L# E! n2 Z
- POINT_COLOR=RED;% o1 z" W, Q2 ]5 R6 e
- LCD_ShowString(10, 50, 16, "Welcome come to My world",0);
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- //LCD_BL_SET;$ U/ L1 Z9 J4 F; J/ Z t
- memset(RX_buff,0,RX_len);7 s" O5 ^5 s" u# x
- HAL_UART_Receive_IT(&huart1, &RX_temp, 1);
' v4 y8 Q2 o- k0 ? - HAL_UART_Receive_IT(&huart2, &RX2_temp, 1);+ ]7 q: R! k- u0 i/ [! l
0 S' ^* v; R7 f8 d% G& t4 A: C |- HAL_TIM_Base_Start_IT(&htim3);9 q$ D6 T6 |0 N5 K2 e
% u% S5 B' {) c {# a+ ~- HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
& A" u, ]# v, T6 } - HAL_ADC_Start_DMA(&hadc1, ADC_val, ADC_length);7 r3 O/ W4 x w: e( f6 i' P& @
- * u/ _( _; E3 t7 v6 @# Y/ Q" h
- //HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, 0x100);, w0 i! W, p6 X6 _3 G+ u* k: y2 f
- DAC1_Set_Vol(DAC_Value);
( c) n- \* C2 x! ~) N - /* USER CODE END 2 */
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- /* Infinite loop */: C6 h# n" J7 q6 e# w( ?8 K
- /* USER CODE BEGIN WHILE */
' S3 I! _# u3 [. @* D - while (1)
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- /* USER CODE END WHILE */
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- /* USER CODE BEGIN 3 */' q) h8 l2 U& \, s
- HAL_Delay(500);
$ {2 ~6 d, q9 ]4 s8 X+ z( y) b) ` - DAC1_Set_Vol(DAC_Value);
8 ^& H( U! y- [% }$ ~1 d- q! L3 }2 H7 u - sprintf(buff,"S:ADC: %1.2f DAC:%4d\r\n",Get_ADC(),DAC_Value);
l" B& | y6 r9 \0 e - LCD_ShowString(10, 70, 16, buff, 0);
+ E4 U5 u4 ?6 I# T - : ~# m0 t3 j2 P
- sprintf(buff,"S:DACG:%5d\r\n",HAL_DAC_GetValue(&hdac,DAC_CHANNEL_1));
. f/ I6 `, X) a+ ~5 q - LCD_ShowString(10, 90, 16, buff, 0);
& Y- n1 {. b1 b2 ^( X1 Q - HAL_UART_Transmit(&huart1, buff, strlen(buff), 10);
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- /* USER CODE END 3 */- B3 q+ u9 H" A
- }
复制代码 在STM32CUBEIDE中,想要调用sprintf()和printf()程序的话要在软件里设置一下& z6 ^% C0 y9 Z! \
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(PS:软件里面也要选Debug模式,Release模式好像编译不了这两个函数)2 ?7 h6 q) r# U# [. Y# M
工程:Pro5.zip8 c J! Q+ f6 G. s% d6 { ^; ~8 s
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