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~$ \7 b, y/ d# B) u& N
作为B-U585I-IOT02A开发板之自用程序模板~
_( c" G/ {" h& G, z2 ~0 n9 V6 |) }; U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~
% q9 W$ v2 |$ G' ^) Q并调了一个LED~主循环代码为查询串口,并输出输入的字~
$ \" n n# g2 k) F/ z结构:
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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~
0 ?9 n6 R+ z! k5 J) F4 Qdelay包含us及ms级别延时及延时初始化~
5 d/ ^0 Z$ ^. x: zusart_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~
5 s; M( Y% z1 C6 m. c串口初始化:
+ z: C7 b& M) T& O9 P/ `- void MX_USART1_UART_Init(void)! i8 R2 F8 j, u7 u! O
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' n6 |! R8 [2 w1 {# J8 f9 l- /* USER CODE BEGIN USART1_Init 0 */, [& i3 @0 s p! p( H% m
/ Q; v2 B1 [! }% k, X- /* USER CODE END USART1_Init 0 */; B0 k) k0 b1 t3 d9 I
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- /* USER CODE BEGIN USART1_Init 1 */
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+ p( @. D5 {/ X- B- /* USER CODE END USART1_Init 1 */5 E2 a9 \0 M C1 y" P F3 \, e9 D
- huart1.Instance = USART1;
1 a6 k. A$ a: L r) J2 Y - huart1.Init.BaudRate = 115200;8 A/ A% K# k# O8 H/ u- W# Y
- huart1.Init.WordLength = UART_WORDLENGTH_8B;' B- Y, U* u' q1 `" T$ ]) h
- huart1.Init.StopBits = UART_STOPBITS_1;6 |! \' J7 w: z& G
- huart1.Init.Parity = UART_PARITY_NONE;: n0 W m; Q: w: i: ~. C( V& e
- huart1.Init.Mode = UART_MODE_TX_RX;
/ g$ P9 k+ F3 |2 O+ O+ L - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;+ q5 i9 v$ q8 k2 T* W, ~
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;( H3 w; \+ N, b' r
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
3 E( ]# k9 T% b( \" G1 `1 X3 c$ { - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
5 t6 z2 J( L$ B. j& d, V4 ^ - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
# K7 [" ]% A8 K* U z4 _8 @ - if (HAL_UART_Init(&huart1) != HAL_OK)
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- Error_Handler();
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- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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1 z; ] x) B0 C3 ?8 w* U - Error_Handler();
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! L; f' i9 ?0 U# u$ x - if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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* F p( J: y: z7 w! P4 M9 O) u - Error_Handler();; p b/ y* q0 ?3 z: z% P& N" `- e
- }
0 N: K! E% r/ ^* } - if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
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2 M9 _' F. F% K/ d - Error_Handler();6 y0 y8 T# e% j$ _* D. B) K8 k
- }
2 y1 _. f' N0 H1 g5 j - /* USER CODE BEGIN USART1_Init 2 */
( |) d! v$ A: y - #if EN_USART1_RX8 R( g7 q v. K' M9 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
) F3 W" K+ g" q$ [ - #endif
r6 m- }8 N* K+ k" I! H4 I, ` - /* USER CODE END USART1_Init 2 */
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复制代码 . a. s& {9 Q; f1 J
# M3 b& ^# X2 b, X' A串口中断会掉函数:
% w5 N2 Q) _; e( W; R, D, R* p( K- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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- if(huart->Instance==USART1)//如果是串口1
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- P/ i9 {8 t; L/ D: A. P+ \ Y - if((USART_RX_STA&0x8000)==0)//接收未完成
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1 N, }3 m% \5 ?% S, X - if(USART_RX_STA&0x4000)//接收到了0x0d+ Y5 W0 A8 v1 x" C F7 Y1 N3 h
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- if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
$ ], s5 b( `' |9 u3 b: z2 v' n3 Y4 m - else USART_RX_STA|=0x8000; //接收完成了
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- else //还没收到0X0D6 r# G: H$ _8 L8 n8 z
- {
9 {1 }% \" P) W$ ]" a+ o" J9 t - if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;% b( n* K; t0 l: K0 o2 w& q
- else
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- USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;) v* M- T0 u/ m$ y1 P0 l% y7 H2 W
- USART_RX_STA++;
: A4 q6 M/ ]! R" x - if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收 , Y, A3 N; }: |# n2 O
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- }
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- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);; s* d9 I6 B* e& N7 ^: X7 o
- }
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复制代码 delay函数:
) n9 G- a- \% N4 u8 _& t0 h6 f- void delay_us(u32 nus)/ C9 I# S7 E% S) {, {
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- u32 ticks;
2 ^( {! @4 a% C* \5 s! W- ?& Q% a/ W - u32 told,tnow,tcnt=0;
2 n- G/ s( `/ t9 e ^6 L5 N - u32 reload=SysTick->LOAD; //LOAD的值 8 Y; Z5 {) x4 v% P8 T# J
- ticks=nus*fac_us; //需要的节拍数
7 L5 i$ Q$ w$ `* A+ F - told=SysTick->VAL; //刚进入时的计数器值 J ]4 Q7 Y' A+ C8 r& X
- while(1)" z, B9 h& C3 p
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- tnow=SysTick->VAL;
) d* s: I. q B - 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.* C+ i% M/ w9 p! b: {3 Y5 r' `7 a
- else tcnt+=reload-tnow+told; 6 H/ E1 U [6 [! {
- told=tnow;( ^; E3 ?& l$ D+ V8 o
- if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.4 u& D# f* E; d* [: g8 F" a
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- };
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* j3 I& } ]$ ~6 L$ ]1 C - //延时nms- w# g- O2 [4 Y( @) g b: N
- //nms:要延时的ms数 g' j% r# b/ ^7 E
- void delay_ms(u16 nms)
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- u32 i;
. a" X% T/ G5 s3 x8 ~0 s - for(i=0;i<nms;i++) delay_us(1000);
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复制代码 main,c
7 r- D3 q, c9 n% r- int main(void)
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# u- ]# \6 t4 n& V' ]( X( a - /* USER CODE BEGIN 1 */
" u$ v- `9 E% O3 x! d - u8 len;
; c& {7 t, x( j4 i - u16 times=0;6 ?5 J( ~+ z; M
- /* USER CODE END 1 */" f2 s3 h2 e0 P% r
~( B! A7 ?, ~9 D5 f- /* MCU Configuration--------------------------------------------------------*/' G; R1 ~2 G7 M9 x3 a
|" Y+ D8 v* X, \( n& ~% o+ _, e- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
5 X0 Y8 @9 o# N6 ? - HAL_Init();
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- /* USER CODE BEGIN Init */
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) v6 L- l; t' X- o v7 C- /* USER CODE END Init */! m, H' t' U$ |) {6 t+ d/ }9 w
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- /* Configure the system clock */$ B' Z% Z. A" ^* O' C( r5 R
- SystemClock_Config();8 B N! j% X, t) s; ^
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- /* USER CODE BEGIN SysInit */
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, _; R- F4 h8 Z3 F/ k6 M& l6 @- /* USER CODE END SysInit */: ]& a- q) X/ r4 x
$ A# O3 @7 n$ U: x; c+ _- /* Initialize all configured peripherals */& j& [& s) I% y+ U0 {% c$ p% f
- MX_GPIO_Init();) e8 g8 h* {! v6 R' E
- MX_USART1_UART_Init();
! [- C1 \2 W/ q4 X6 Z( ^ - MX_SPI2_Init();
! ~. H! m4 h2 ^ - /* USER CODE BEGIN 2 */
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- //uartdbg_init(115200);' K6 _8 D1 k% o
- delay_init(168); //初始化延时函数
2 E2 N. v$ {/ @6 R1 V3 m+ }- o% B5 k - uartdbg_init(115200);
/ r, k7 x/ L# p: G0 ?' `# d" w' d9 P - LED_Init(); //初始化LED
* |2 ~1 t! ?/ w& [( ]" B - /* USER CODE END 2 */( J% p2 H$ z8 |& _: [3 V
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- /* Infinite loop */% E; _. c7 S* U
- /* USER CODE BEGIN WHILE */
$ E3 Q: }. ~, f% d: p - while (1)6 r4 F8 j+ h- [; H
- {
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5 G1 R, ^; ~1 h7 s) C# A- if(USART_RX_STA&0x8000), Z1 q2 Z: ~3 V5 g; B' T
- {
; }3 B ~$ |; x& q) U! \ - len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度. _4 m6 u% ~+ V1 q. ~
- printf("\r\n您发送的消息为:\r\n");
) z P+ L) p) ~4 P - HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据
) h( t; E" B) k2 U4 A+ U - while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束
7 ?. m7 E1 ]* ^ g4 A- F, j0 w9 B - printf("\r\n\r\n");//插入换行
. @, W) R- w2 ?3 c# I# \ P - USART_RX_STA=0;
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, _# S$ h7 g9 `' w$ d - times++;. y3 q& L$ Q- J. w' P e
- if(times%5000==0): v2 }6 j& c R, J4 c
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- printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");9 z' \6 P7 \$ m, C7 r7 P, Q
- printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");$ {8 S" g0 C+ r) I9 \
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- if(times%200==0){printf("请输入数据,以回车键结束\r\n"); }
, h! w7 o. D" H - if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.
3 i8 J: f$ _. d a - delay_ms(10); : p' x% |' b. ^8 U& K
- }
8 Z C- E/ P) ]2 B - /* USER CODE END WHILE */
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' a( N' Z! Q' v. l u- /* USER CODE BEGIN 3 */$ K6 y+ z8 r: F9 k# I1 n9 Z B; ~) S
- }
' f( V4 }- V( u O/ F0 I9 H - /* USER CODE END 3 */
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复制代码 下载后,串口响应:" _" f+ B3 e7 G6 n, B
# b) J% v- s" }' P3 x& r& l6 o好了,模板就到这了~% K' i4 w4 C5 P- f7 C5 X3 O
代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 5)
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