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~& _* m/ C0 |" b" c3 s
作为B-U585I-IOT02A开发板之自用程序模板~
0 a: C6 i$ B/ q* @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~/ ~/ Y+ p+ _' Z
并调了一个LED~主循环代码为查询串口,并输出输入的字~0 k _4 ]4 J4 Z/ y J
结构:) ~: x3 |/ H# h) z# v3 v8 H
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sys包含数据类型的简化定义定义及一些汇编指令~
' R! o# p$ {$ o2 idelay包含us及ms级别延时及延时初始化~
/ v6 X. u/ R& Busart_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~
2 ?; O; \# L. n4 \9 w串口初始化:
2 |9 g4 S# L4 X9 \8 d- void MX_USART1_UART_Init(void) V! ]% h! }. f2 T
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- /* USER CODE BEGIN USART1_Init 0 */8 |* i* s: ]$ ]6 _" V. ~7 d" d
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- /* USER CODE END USART1_Init 0 */1 Z( m6 Y& ^( G
6 d& O* T2 |7 ^4 c1 F- /* USER CODE BEGIN USART1_Init 1 */# p2 i$ I2 M" ^! b' Z
5 e: T/ L4 x4 g$ J J. s B1 y- /* USER CODE END USART1_Init 1 */
2 g0 H6 y( _1 U5 f0 h8 W8 T, \4 l - huart1.Instance = USART1;4 I0 T7 g) b( p3 A% b2 H
- huart1.Init.BaudRate = 115200;3 s! W; u% O( {
- huart1.Init.WordLength = UART_WORDLENGTH_8B;( n5 U \' ~. J7 N$ s: a
- huart1.Init.StopBits = UART_STOPBITS_1;
; N0 F3 ]: T6 Y" {# z - huart1.Init.Parity = UART_PARITY_NONE;9 |5 p6 l- F3 ?4 B7 b
- huart1.Init.Mode = UART_MODE_TX_RX;
. {% F7 D- T N V - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
' O0 L/ N) t4 X7 ~' C - huart1.Init.OverSampling = UART_OVERSAMPLING_16;6 k. [1 z L8 F6 ~6 ?
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
4 [. E. N- B9 N7 ` C - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
& o3 t: j8 a; S, x6 D8 \8 k - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;4 d+ Q3 A; ^8 X1 I
- if (HAL_UART_Init(&huart1) != HAL_OK)
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1 n" I9 p+ ] f( J1 g+ u - Error_Handler();1 z8 `1 g9 l3 z) z/ z, _7 c
- }
$ x" H3 }: w9 B, m9 L1 ?2 l& |8 o - if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)2 ^/ n8 }' I- o# l+ o, _
- {
& ^4 _# L, l; x$ U; G7 ] - Error_Handler();
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- if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)0 r% O* Z4 q0 X, `2 C
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- Error_Handler();3 a; T0 b) U7 D. {
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- if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)' ^ B6 T0 T9 j3 p: a
- {
, F% i! }* c3 k( V - Error_Handler();
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& t. \# E3 @# K) J" G7 J. k - /* USER CODE BEGIN USART1_Init 2 */
1 C5 o0 |# h. Y+ k& p% k - #if EN_USART1_RX6 }3 Y8 @. G. w
- 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7 [1 _( d' @) I3 r" K8 z) J
- #endif
/ T0 ^& r& Q' R0 V' {1 D# m# F - /* USER CODE END USART1_Init 2 */+ p5 ?0 F& v6 \# I0 g+ e6 c. s; K
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- }
复制代码
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6 d& O8 x; `; D) y/ {串口中断会掉函数:
- j; U4 r% D8 f2 }5 B- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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- if(huart->Instance==USART1)//如果是串口13 O6 g( C7 n4 F: U! V. y
- {
! z- ?4 ]# D, p- Y# p - if((USART_RX_STA&0x8000)==0)//接收未完成1 }/ y+ _/ ]( D/ T
- {
' R- r) l5 l3 ?7 D# Z2 ^ - if(USART_RX_STA&0x4000)//接收到了0x0d
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- if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始3 P: c% G2 e ]& p h/ Z* N. ], R
- else USART_RX_STA|=0x8000; //接收完成了 % C$ V( E& o5 x( X/ ^
- }
L& \6 g9 ` ^# _+ Z2 p - else //还没收到0X0D# _9 |4 s; N' f8 b' l2 b
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- if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;
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- USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;
# M. W1 G, ?7 S - USART_RX_STA++;
6 @6 o/ o9 N( J - if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
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# R4 h# l' B/ V' P8 }- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);
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- }
复制代码 delay函数:
# a, r4 a6 L9 V3 F- void delay_us(u32 nus)
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- u32 ticks;+ e" V3 k6 F: {" m$ ?
- u32 told,tnow,tcnt=0;& P* s( u1 d( Y( L5 S
- u32 reload=SysTick->LOAD; //LOAD的值 - Z( x9 y: p9 @
- ticks=nus*fac_us; //需要的节拍数
0 g' L* {( i6 a8 M2 y& i - told=SysTick->VAL; //刚进入时的计数器值
, o; z& c. ]2 ?: l5 G8 u! R - while(1) T9 Z; x; [# _! N
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- tnow=SysTick->VAL; 3 b3 O! j: z! n& |- m
- if(tnow!=told)
6 [5 O; r( B) y - {
3 u/ K4 O2 s2 @1 J% v1 T - 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.) E" L* e# t# j3 x, { J6 n
- else tcnt+=reload-tnow+told; ; z @( i$ W& P \% i7 ? [; d
- told=tnow;) m, v" g& ^% s% K e# s2 a" p
- if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.0 T2 T+ \/ N+ h2 \$ N; a
- }
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- }
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_3 y1 z' p, \- u- E - //延时nms
3 Z2 \* i# N# E5 A( |( ?) T. l - //nms:要延时的ms数1 Y. r; R0 J! t- p! R
- void delay_ms(u16 nms)
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- u32 i;6 w. k8 j" H c Q2 F
- for(i=0;i<nms;i++) delay_us(1000);6 w3 |) Z5 g0 a1 t/ n. w
- }
复制代码 main,c
& b( b- c( H6 w; i- int main(void), X9 ]4 ]: Y% d
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- /* USER CODE BEGIN 1 */8 e1 r: U. b+ N$ e
- u8 len; 5 M* y. g' p y
- u16 times=0;
8 ~3 r5 K# r6 z5 Y$ P - /* USER CODE END 1 */
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- /* MCU Configuration--------------------------------------------------------*/
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- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */4 X G! Y. h' V3 |
- HAL_Init();2 e0 e: m8 D1 J8 r) y( j
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- /* USER CODE BEGIN Init */
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' D' H* ?2 N* D# O: U3 K- /* USER CODE END Init */
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- /* Configure the system clock */
$ C, `! v9 M. \9 C: J2 s - SystemClock_Config();
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' e, y/ }4 u( J0 N2 q# K- /* USER CODE BEGIN SysInit */- K9 O$ x ]5 ]# H
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- /* USER CODE END SysInit */
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- /* Initialize all configured peripherals */' }2 t8 [/ @7 ~$ j% _, ^8 u! U
- MX_GPIO_Init();+ a. _- C1 H( Y% T, G
- MX_USART1_UART_Init();
, d* B4 l) q. I! l# |. | - MX_SPI2_Init();
6 K# U8 b e4 z1 _ - /* USER CODE BEGIN 2 */- z, H* O& v0 h
-
* e$ p: g: D7 z. g - //uartdbg_init(115200);
% O9 [1 ]. D' J4 L5 `& d Y - delay_init(168); //初始化延时函数
. s# H& ]3 [& }6 X# v, y - uartdbg_init(115200);
( J0 }% g% b7 v3 G f- x) p7 W9 I - LED_Init(); //初始化LED
( X A; F4 w/ u0 s- O/ b' Z - /* USER CODE END 2 */" \ e) @! Q# h
- ! z+ }) A0 A0 @$ t. I. [
- /* Infinite loop */0 Q7 [ l% K; x% q$ }* L8 ?: @9 J
- /* USER CODE BEGIN WHILE */8 N$ w) r1 Z) K" H0 r( w3 ~: Q+ u
- while (1)& p0 l, E* N% u6 s& r
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- if(USART_RX_STA&0x8000)
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4 Q0 f/ @- o( ?( @5 ?) p" a0 Q' A - len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度
" L# a0 h: {( [ - printf("\r\n您发送的消息为:\r\n");0 S& _6 z- I) O/ F& w) v. i
- HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据$ s% H: m6 ^; j
- while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束
P- _. Q1 P/ H - printf("\r\n\r\n");//插入换行: G) d1 p( Q) T! n! \; y
- USART_RX_STA=0;" E$ A! f! T" [. X( m, R/ Y9 T D
- }else* F F7 p- l4 U2 Y' g
- {
2 n! A" r3 Q2 } r, w0 {! W - times++;9 W9 [" o& F' p& X
- if(times%5000==0)
; B6 [) Z: H) Z, Q$ J - {
8 y& v9 j& c- H3 L2 }; n - printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");3 _# n$ M: [# D* Z! u+ P0 i& n5 @
- printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");3 f' ?' G4 Q0 `! ]
- }
0 Z) _) f' `) H3 }, a - if(times%200==0){printf("请输入数据,以回车键结束\r\n"); } # N# s6 m' O6 b9 d
- if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.
" a) S1 d ?3 X, P' f I( F+ a - delay_ms(10);
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- /* USER CODE END WHILE */
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- /* USER CODE BEGIN 3 */1 l0 P1 v; G4 E1 _5 J1 ~( k
- }
; u9 _: K v& g; I+ L - /* USER CODE END 3 */
1 a8 E. Z% d* |- Y7 k' j" o - }
复制代码 下载后,串口响应:
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6 o4 ]4 B& C" z' H& B2 D( J: D好了,模板就到这了~
1 ?* g" W" D4 b+ \" n代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 5)
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