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~! o* U9 k5 i7 E c; \& J$ m; u
作为B-U585I-IOT02A开发板之自用程序模板~8 P' l5 _2 d% k
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~
& u. I$ d* q! l; b4 g0 V并调了一个LED~主循环代码为查询串口,并输出输入的字~) x7 K4 p( S; I2 c6 [- o* P: u
结构:6 F1 G6 ] N) B8 H4 z3 n
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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~4 L- `$ `) j5 ^! C% q- N) T4 f
delay包含us及ms级别延时及延时初始化~8 o2 L+ I( O: Z
usart_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~
0 k6 B; A9 Q2 [& T6 G" d7 Z串口初始化:
2 y* H/ v# k: O+ d6 D- void MX_USART1_UART_Init(void)
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- /* USER CODE BEGIN USART1_Init 0 */
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- \+ q. t+ J$ K1 P! X- /* USER CODE END USART1_Init 0 */
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3 k/ }% q/ |# L2 @( R6 {7 ^2 x. X" X- /* USER CODE BEGIN USART1_Init 1 */( l$ _3 U% ]. w
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- /* USER CODE END USART1_Init 1 */ G/ J: }& W3 B' h. }6 {8 d
- huart1.Instance = USART1;
' z! D1 G2 X9 j% c( ^) P - huart1.Init.BaudRate = 115200;
i" T0 @- ?" U - huart1.Init.WordLength = UART_WORDLENGTH_8B;
9 M8 y4 m/ _! ?4 X3 b& C - huart1.Init.StopBits = UART_STOPBITS_1;
% s3 X! ?# h6 K& I9 U& B - huart1.Init.Parity = UART_PARITY_NONE;5 V% g$ M, O/ j4 y# u0 l$ y
- huart1.Init.Mode = UART_MODE_TX_RX;
& n5 I P) }2 I; P4 n5 O - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;2 n6 I# \# ]4 S, K' r/ _
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;) c+ C. K& {2 Y6 V' u3 b
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;9 m J1 ]: k+ u: e
- huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;6 k0 C( a K9 s \ g# w
- huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;5 d# J9 W; E) C+ H) r2 j" k
- if (HAL_UART_Init(&huart1) != HAL_OK)) F `- g2 y% i7 V# L
- {
& A+ R/ i! t! K' _1 g6 j - Error_Handler();
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, k* i5 E1 q w4 y4 \: F1 F* l' p - if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)1 y9 t+ O) C& Q* }% c0 Z3 H
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- Error_Handler();) c+ ~0 O5 N, `6 W6 s
- }
. @' G0 T r- m+ y - if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
( [) R; C' V+ q* _0 C1 }6 T - {
8 i; R; ?* _8 F# Z% y, V5 V# D2 J - Error_Handler();
+ w$ g( J, i7 }( ]5 O/ T( r# m6 l+ T - }
. X: A. M+ r7 z/ Q: G& ~! B - if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
+ e" |" W$ G9 ~2 ` - {
& |2 Q% d$ c$ q& ]/ V - Error_Handler();) V9 }8 U2 ~) }
- }
d* S# F. w; ?' \- W: o$ n2 i$ Z - /* USER CODE BEGIN USART1_Init 2 */
# _: O& @2 E2 h: ~% b/ B - #if EN_USART1_RX
6 S7 R/ D. T P4 r2 U; I - 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4 u( A( P* f$ S0 \
- #endif% }* p' r, k( R3 M
- /* USER CODE END USART1_Init 2 */
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复制代码 % v Q$ F Q d) R) m8 e
2 K9 X& x3 N6 a$ ?: X串口中断会掉函数:
* h( p2 ]6 z( @, p5 d- R% H- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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- if(huart->Instance==USART1)//如果是串口1* r% u9 g' Q+ w6 }4 F0 n
- {
8 a; J/ m+ ^: x3 I7 N% h - if((USART_RX_STA&0x8000)==0)//接收未完成& p: w; h# j1 T
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- if(USART_RX_STA&0x4000)//接收到了0x0d5 c8 W* p- x, l. ~7 L8 a; B" }
- {
- D" h- H4 i1 e - if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
4 w( \0 ?6 @! \6 F - else USART_RX_STA|=0x8000; //接收完成了 8 d) R9 X" N' i+ o; Z6 O* ]* y: s# d/ g
- }4 O+ Z( d: @9 U; Z: b. k! }
- else //还没收到0X0D" j. J! _0 y* S' S4 ?
- {
7 K* b- a# m7 W+ h* i8 ^5 M5 k - if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;' M, `! ^- g0 g
- else- G1 `" _2 @& s1 R. {" e
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- USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;, f; }4 P8 T+ j$ {
- USART_RX_STA++;
1 o' g# C. ^& O4 \7 V - if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收 / c9 j' v; b3 m
- }
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- }
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- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);
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复制代码 delay函数:
7 ~; k7 h: D* _2 F, c" J- void delay_us(u32 nus)
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% @' X Y- j ]$ Z/ z6 { - u32 ticks;
+ c1 m. C% R% F. P# K9 |5 {6 K - u32 told,tnow,tcnt=0;7 ^7 o# y0 ^- Q
- u32 reload=SysTick->LOAD; //LOAD的值
. e8 [, [! j0 w4 c. r - ticks=nus*fac_us; //需要的节拍数 7 [8 `& a3 K7 k) Z) O. L5 N: C' J
- told=SysTick->VAL; //刚进入时的计数器值0 d6 Z( X6 ?( H/ q% ~# F
- while(1)
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- tnow=SysTick->VAL; # K/ h, @* _) W, R
- if(tnow!=told)
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- 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.; N4 S- R! H5 S0 L0 I5 w
- else tcnt+=reload-tnow+told; ) D, L0 L0 B9 z$ H
- told=tnow;, M' {5 ?2 i& j, J5 O
- if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出." e ]- X2 P- }9 d8 T* p
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- };
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h4 L8 b3 Q9 O( m0 _( k5 K; D - //延时nms1 g" C9 i: C& i* m) h2 V9 E
- //nms:要延时的ms数
+ ]7 B) l1 \3 x: u& f& N2 B& u! V - void delay_ms(u16 nms); S# o; ~/ \. [1 E! U0 F
- {
% i2 g6 h( B2 t- h* r2 t1 L - u32 i;
- w$ a- |* Z9 q# H+ z - for(i=0;i<nms;i++) delay_us(1000);
, o0 A6 v% p0 Z" H) S% R - }
复制代码 main,c, L: T. p; f! T8 c# c
- int main(void)
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- /* USER CODE BEGIN 1 */
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- u16 times=0;
* V) B5 T' ?; l2 X* g# {! s - /* 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. */9 N9 U. W8 H+ n& {& i
- HAL_Init();
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- /* USER CODE BEGIN Init */
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- /* USER CODE END Init */
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. A' H" _* z0 u3 B4 _- /* Configure the system clock */
' Z0 D" N: [# K; C - SystemClock_Config();0 G- X, F5 R0 s3 M8 B
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- /* USER CODE BEGIN SysInit */
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/ |: ?! A# H7 z e% P5 o- /* USER CODE END SysInit */- E, p$ C0 ]) n6 _
4 O r2 U2 d' D/ H7 T! [) q- /* Initialize all configured peripherals */
& J. y% N% ~4 f+ w - MX_GPIO_Init();
{# L# |- K9 a$ h4 B R - MX_USART1_UART_Init();
, `4 {# u' F6 {& d) Y' D- l - MX_SPI2_Init();4 x" z- P7 U0 T5 @+ }0 g
- /* USER CODE BEGIN 2 */' a- J/ J! O. V. Y# y3 t3 D
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- //uartdbg_init(115200);
: r! E/ F8 p( c3 G: w: ~ - delay_init(168); //初始化延时函数0 t* y" Y1 z6 F; [' J0 T% s4 j6 a- v
- uartdbg_init(115200);
# R1 b# A" y4 T7 ?. {- R0 l0 I& A - LED_Init(); //初始化LED
w8 y$ a- R3 @# X - /* USER CODE END 2 */
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- /* Infinite loop */
, f0 I2 ^3 ?6 s/ `9 P, e7 c - /* USER CODE BEGIN WHILE *// ^: {$ `% n4 |2 m# B0 A0 R
- while (1)
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7 i! {3 Q t# y! C7 R- A- if(USART_RX_STA&0x8000)) K2 ~: n2 w. w" v7 f: A
- { * b" ]: ]) ?! k0 y( v/ m# E# ]
- len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度
1 f& i/ h( F' Z$ {. z - printf("\r\n您发送的消息为:\r\n");+ q) x. u, s. ^5 Q- {% c/ \
- HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据+ h5 J3 U* G- [8 F
- while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束
/ G/ @0 n5 X- } - printf("\r\n\r\n");//插入换行
4 d0 u6 E9 f$ s - USART_RX_STA=0; N, ~( D" H" V$ v `1 t6 z( ^
- }else
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; o3 v# k% ]6 D' S4 p% ^6 m - times++;
: O9 T @* _, [* {6 p - if(times%5000==0)7 _4 F _4 Z& e
- {
$ [( }# i! p6 j - printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");
8 m8 c0 J, ?$ i+ ]8 M2 o - printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");1 I+ U) K2 T2 P7 u3 r7 L6 P: X ?* J3 R
- }
. T8 Y, m5 ]% G( c- F9 b - if(times%200==0){printf("请输入数据,以回车键结束\r\n"); } % r" {/ r: U: L1 u1 R4 a
- if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.3 k2 G/ d# M; q f% `) _& {3 h
- delay_ms(10);
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7 Z$ h: Y; \2 O9 A: }/ n y - /* USER CODE END WHILE */
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- /* USER CODE BEGIN 3 */
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, Y% \+ G: \0 l$ ~9 A! y$ n9 E - /* USER CODE END 3 */
, q4 A. A9 g: N! d2 o/ K - }
复制代码 下载后,串口响应:
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9 K2 l5 q% Y; P3 @: |, F好了,模板就到这了~
. r- h5 j5 Q5 k; u0 L5 [代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 5)
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