当年学STM32从正点原子入得坑,很习惯它的那套程序架构及几个核心文件~这了我已官方的例程为样板稍微修改下~
+ v1 a& u6 N4 m1 n% w作为B-U585I-IOT02A开发板之自用程序模板~) y3 q' S* |6 }, ~# B/ e$ L% I7 H
主要开启了SYSTICK 作为延时函数基准,具有毫秒微妙级别延时函数,USART1作为调试串口,快速printf及接受数据~
4 N: E" e+ Y- l& R; P5 D2 P) a% o并调了一个LED~主循环代码为查询串口,并输出输入的字~( Q/ ^- H0 i8 L0 K! X4 Q$ V
结构:( L Y. u8 X- e3 _6 l' Z9 Y
4 V) T" z" I; T; F r5 |# ]sys包含数据类型的简化定义定义及一些汇编指令~1 |9 x$ F2 F6 {' z) U
delay包含us及ms级别延时及延时初始化~
) N) A! {) s. U" d) v2 U) X qusart_debug包含串口printf重定向及串口接受中断函数,数据接收均以“\r\n”为结束标志~ J- y6 t {8 ]# L3 p- U
串口初始化:* u5 Q9 ?% ?7 \; ~! ^) \& D$ ~
- void MX_USART1_UART_Init(void)
1 T5 T" V. D/ E; t - {6 X4 i5 _7 c! d" t L
0 m, T3 C- f {( }- /* USER CODE BEGIN USART1_Init 0 */& O8 T+ W6 a) z( J- p" M) S
- % z5 s$ _* O& s% I: h
- /* USER CODE END USART1_Init 0 */0 \2 C8 d/ [# K* b; I: f* ]$ Z
3 e" \9 l& [) Q2 C# E" G6 K% Y8 N0 t- /* USER CODE BEGIN USART1_Init 1 */. Y8 ~6 j, f5 h9 K& H: n4 I0 J4 c
- ! b! h, s% A5 d1 i. n% \ |6 H
- /* USER CODE END USART1_Init 1 */+ M& ]& T2 |& V0 o
- huart1.Instance = USART1;
: A" k! K' m, P0 D - huart1.Init.BaudRate = 115200;3 O R4 T$ c* m
- huart1.Init.WordLength = UART_WORDLENGTH_8B;0 P% @3 k) q! u& {- ^
- huart1.Init.StopBits = UART_STOPBITS_1;% A* j, M3 Q0 C
- huart1.Init.Parity = UART_PARITY_NONE;" A4 V3 T9 d5 ] h' g0 C& u
- huart1.Init.Mode = UART_MODE_TX_RX;' j6 Z3 }3 ?/ ?! ^0 b8 J" t
- huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;6 u+ F' M' |9 j; P9 @
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;
: L m* J( u. U/ x% D |. D5 Z - huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
- Q( Z. Z1 B1 l1 l( V - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
4 G7 l7 `" F' \7 r' O9 D - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT; a: \ g% N$ d2 a/ k5 L t: t9 ]
- if (HAL_UART_Init(&huart1) != HAL_OK)
+ S* `9 @/ C u4 T& {" b - {+ f- f2 W' _! I# {3 z( t3 k1 z
- Error_Handler();% Y% q# e8 r3 T8 a' {* J
- }4 c& t( q$ e1 c1 X* Y
- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
9 r7 [# b/ h, K8 d) t/ E4 f" e - {
' a Z7 L8 t* G' w8 P - Error_Handler();
+ R3 ~- v% u7 J) J7 i - }
% e b9 c2 z: g. ? - if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
' l# g& @5 _$ L* S: _4 ~ - {2 @4 g% w& \/ y8 f, B9 R
- Error_Handler();8 P3 S. _9 p+ k
- }8 j$ i3 p M0 }1 F T/ P
- if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)0 H5 x; O' c7 ?. V: \; s" H
- {
" L8 I) [9 o7 v) W; x* Z) g( d - Error_Handler();
1 F3 h2 ^& Y4 ^- @& T$ V7 L - }7 B4 j+ k% s# D
- /* USER CODE BEGIN USART1_Init 2 */
: @2 [, U; h2 x- @! y/ D9 p2 Y - #if EN_USART1_RX" P7 X' k8 M' j
- HAL_UART_Receive_IT(&huart1, (u8 *)aRxBuffer, RXBUFFERSIZE);//该函数会开启接收中断:标志位UART_IT_RXNE,并且设置接收缓冲以及接收缓冲接收最大数据量1 s. F2 G N4 q* P" s9 l' c% ^
- #endif+ o/ ]. v* y5 Z
- /* USER CODE END USART1_Init 2 */
8 w$ u0 ~$ C* w$ [
7 X) p, ?0 I G" ~2 }8 b/ J/ B y0 }- }
复制代码
( K# R; {% R) p4 [
5 m8 J& U8 F4 x* z7 R. i6 ]串口中断会掉函数:2 T* @) W4 ]3 |* b0 K
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
; ^) z" B% T. Z" J; I" h - {
g1 H8 o/ ] l+ A4 X- U - / y" W2 [% E; |( H& K- t2 ~
- if(huart->Instance==USART1)//如果是串口1) V, [$ G4 g+ U/ j. [; n5 @
- {
6 }, j# q: s1 i. H! j - if((USART_RX_STA&0x8000)==0)//接收未完成& m" C- y4 c& s- G4 F! s7 D
- {
% a8 b. n. ?1 O7 ?4 O1 I - if(USART_RX_STA&0x4000)//接收到了0x0d
. G/ S2 v9 C5 }8 u: J; J2 E. s - {5 l X/ n- P/ T C# t5 b8 X
- if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
( y- ~3 j' C" V1 v" d - else USART_RX_STA|=0x8000; //接收完成了
) z' A) D% C2 c1 `- c - }
& z, A* D+ F3 B3 X5 `5 \9 D - else //还没收到0X0D
& J+ W. K( V4 W: q ^( Q% y/ B - { 4 q8 D7 z8 g- u9 W7 f7 A+ {4 |+ k% C# b
- if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000; `; T0 k; I3 v9 v- [* w
- else
9 _, P: O8 M, y* }/ ^/ a - {
+ {) g$ V7 u+ p0 w( ]) I7 W- F8 O. H - USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;$ k( `2 D* c7 M0 Q$ F1 h
- USART_RX_STA++;
4 M0 \: {2 v( o8 M; C" y/ Y - if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
' h9 {6 t) j+ w - } 1 G' i- g# J( O. I1 v
- }
- X" | [, W- I& z - }
. g$ g& _5 f/ P% w2 s( b - " `3 C. J) i: i& C+ d- E, ?7 }/ v
- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);3 G- o+ C& ?! Z7 k3 f. I
- }
. @3 W! V4 v7 O8 D - }
复制代码 delay函数:6 s4 E! [* m! j: t1 j
- void delay_us(u32 nus)3 \5 I w+ e$ n/ W8 V1 ^
- { 3 p2 a! M3 L$ v- H7 E! g
- u32 ticks;
\. _" |9 s5 n. F - u32 told,tnow,tcnt=0;+ J \( q! e; o- m0 g" X$ v7 u
- u32 reload=SysTick->LOAD; //LOAD的值 g. c+ o: F4 d# a; U
- ticks=nus*fac_us; //需要的节拍数 - [8 i# _9 I: F |/ }
- told=SysTick->VAL; //刚进入时的计数器值. ]- A% c o" \; r
- while(1)& L! K U6 y( N. ?) v+ i
- {
& F3 n, P. @$ D' y - tnow=SysTick->VAL; : J8 X' M5 N8 ` X$ b
- if(tnow!=told)
' N: z/ ~1 o. V. h7 X% N1 ]7 q - {
+ W4 g+ f; p4 m; ^, P* A- G - if(tnow<told)tcnt+=told-tnow; //这里注意一下SYSTICK是一个递减的计数器就可以了./ {4 A! j f, S
- else tcnt+=reload-tnow+told; , q3 J7 f4 ?/ v( a
- told=tnow;
' o0 l: \+ x& k- R9 c - if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.
0 q' R8 ]3 r2 v - }
8 a+ i% I: l8 D, f - };
0 J' S' y: R6 n0 h - }- T/ R" m) R6 e( d4 E: i' Y/ D X
-
6 ~% x( n# K) j {7 v/ f - //延时nms
5 M9 p7 x \. L7 I( A; V! W9 z - //nms:要延时的ms数
) Z7 G3 H- o+ J1 f# K" \ - void delay_ms(u16 nms), o! ]" S2 C( y
- {
" s0 f f) {$ F5 S- F- ? - u32 i;
- T0 r3 n" X1 i8 @+ X3 P p: T& K0 f - for(i=0;i<nms;i++) delay_us(1000);
5 Y! q0 h3 ], v0 T - }
复制代码 main,c
/ I" h N6 M1 r( K* @- int main(void)
% s& D! }% J% @& r: z - {& `' Z+ K6 P- Y% O$ q* [# @; u
- /* USER CODE BEGIN 1 */5 \# s- t+ [# t6 ], z
- u8 len; " c* c- \3 c- c- I/ j/ \4 F# h/ I$ K
- u16 times=0;
+ ~" V0 b0 v. A3 m# | - /* USER CODE END 1 */
5 M) Z4 @% F% N9 E5 k5 [ - 1 V5 \- z R. b0 K4 q- W( X, P+ U
- /* MCU Configuration--------------------------------------------------------*/
4 I) S* ^0 W5 |6 s+ b7 ` - " f: ~5 ?( ?& m5 c% t7 M/ I
- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */9 {- n2 j0 |: e \
- HAL_Init();
) A% P* Y) M- C- ?' k$ U# i - 2 G$ T1 Q# o, @, ` v' t& f9 y
- /* USER CODE BEGIN Init */
* n9 c# e9 m8 l- N, X; L7 F- p
; F) ]/ _& Y* U* J" o$ K- /* USER CODE END Init */) V% N$ e6 I* g9 T! U7 F: I
( X: u" V4 M) N. L- /* Configure the system clock */1 d+ T& ]5 S3 A* Q
- SystemClock_Config();
3 ]# ]: @- t) b/ L7 {0 P' i
) V+ {+ ]2 h( Y! F) k+ @. n- /* USER CODE BEGIN SysInit */) `) L' i& f9 c) p G+ B
- 6 d& o/ } G8 s8 C. K
- /* USER CODE END SysInit */' |# P$ G: g1 ]
- 7 C+ L) J3 R4 P* l7 R
- /* Initialize all configured peripherals */( a: A/ t8 `0 y, v. B5 D) Z
- MX_GPIO_Init();' I! [1 D) w m y2 Z( ^7 N4 x
- MX_USART1_UART_Init();
; O5 R! C+ Q0 z+ s5 T+ F" @ - MX_SPI2_Init();
4 x: ]/ V5 ?6 Z* y6 @# E1 [1 o4 X) X1 P - /* USER CODE BEGIN 2 */
) |, y& Z: G* Q% L -
5 L a. Y& O1 m3 F+ C - //uartdbg_init(115200);
+ \3 \7 L* l' J0 A/ L - delay_init(168); //初始化延时函数' }; H. C7 G* H
- uartdbg_init(115200);0 a) B1 O$ j; y! U5 \% r. W' ?
- LED_Init(); //初始化LED . T& ^ L& E( e" n; R4 {8 [* @
- /* USER CODE END 2 */* |0 O' i9 e' R4 G
- + g; f6 S& [$ k! a2 U3 w$ y
- /* Infinite loop */ }# Y8 P0 c% w( |" p0 k
- /* USER CODE BEGIN WHILE */
) d: B9 e4 W/ L) g9 S. P X - while (1)
& \9 n1 e# @3 P2 S - {
$ z" p* r7 ~ g - ) M X: W% d8 I
- if(USART_RX_STA&0x8000)4 E p) P: _ X( y7 Y9 j
- { ! y9 t8 I$ B( E9 z! \
- len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度" E9 e. @2 H5 W; N% u1 D
- printf("\r\n您发送的消息为:\r\n");
# K! s+ A1 y( s% G! W! Y7 n2 Q# o1 W - HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据
5 f& J ]5 C ?, B/ c - while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束
( b5 `' x7 ]! B" t - printf("\r\n\r\n");//插入换行
1 d5 o8 ]8 k( q( V - USART_RX_STA=0; e# x+ R4 }- I: x1 ?
- }else$ D- U. g: V }
- {* K/ G0 {: R! m- z$ b
- times++;
) Y% Y' w1 @6 W - if(times%5000==0)
" Z. w( b' ]7 W* ~# Q - {
/ f' o4 |. z+ d0 A - printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");
) `1 W& ~/ G! |/ g/ e; z - printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");5 s2 Y6 N ]( G) s' [+ g+ h4 o
- }/ Y: z9 i! @5 k2 ~! ?& e1 m4 x6 g
- if(times%200==0){printf("请输入数据,以回车键结束\r\n"); } / b; I2 {& j8 @
- if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.8 A$ U& P% T, i; |, f: |
- delay_ms(10); ' L u% Z$ K) k# t! x; `* K g
- } 1 p* ?& y; ~! |5 h( k! F
- /* USER CODE END WHILE */
" q5 U$ J' C4 S' a; F3 ] - 3 H: a0 z! |! X2 W" W
- /* USER CODE BEGIN 3 */
5 U, s5 |- s; n2 T# _0 V - }
/ e F6 m5 _7 r - /* USER CODE END 3 */$ `+ i6 [) t* {& U4 Z J
- }
复制代码 下载后,串口响应:
* q( P9 g4 Q8 b5 Z; X6 Y: e
# l0 A0 [# U7 n8 |% H好了,模板就到这了~
/ ^ [7 G# u" N' @. e8 W3 }代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 1)
|
' Q3 \. d5 P4 O) z8 |& a
' ? V/ f: |) N! V4 r$ N1 c B: c