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~
0 E8 z9 _$ H3 g作为B-U585I-IOT02A开发板之自用程序模板~. ~, @* _; C A3 d+ J7 V; F4 h. F
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~! W4 U4 ]/ M% R( g2 D
并调了一个LED~主循环代码为查询串口,并输出输入的字~# Y: {% P& W9 q1 m0 d2 U
结构:) U3 B0 e& Y/ Z7 Z+ j: v5 M0 w( F; e
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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 j- U) c4 P8 O2 }9 i7 m" c- K
delay包含us及ms级别延时及延时初始化~
`! {0 v, i: K& z6 Rusart_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~
7 @2 t3 R- r. @( b) \, M串口初始化:: X7 H; A" f! Z) j" u3 f# p
- void MX_USART1_UART_Init(void)/ W7 K' x% G4 ]% G0 q1 L
- {
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- /* USER CODE BEGIN USART1_Init 0 */
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- /* USER CODE END USART1_Init 0 */
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1 d3 |3 c7 ~1 T- P- /* USER CODE BEGIN USART1_Init 1 */
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* W9 q5 o7 I) C" y: y- /* USER CODE END USART1_Init 1 */
7 U. ^5 T" y7 K! A - huart1.Instance = USART1;
3 T# W5 U6 M* A- V: I - huart1.Init.BaudRate = 115200;
( _7 C! H# a1 e - huart1.Init.WordLength = UART_WORDLENGTH_8B;$ E: j( |8 n% z3 C0 @+ j+ |
- huart1.Init.StopBits = UART_STOPBITS_1;
! }& b/ \1 }* e* d; b6 m - huart1.Init.Parity = UART_PARITY_NONE;
$ o, e+ d2 s# y% I, N - huart1.Init.Mode = UART_MODE_TX_RX;
1 t9 M2 g) O+ V% j5 m* p9 g9 g - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;6 Q/ o5 g5 V4 M
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;
: [# s& M2 j+ b* ~ - huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
* d1 x2 x& r0 x! [) E - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
9 C3 {! G. J) q8 Y2 D# l6 D - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
6 k+ F/ H) X5 g' n! m - if (HAL_UART_Init(&huart1) != HAL_OK) `1 {! a" p! L# D+ B9 i/ `* g
- {
9 a# H) I& D: {5 \ - Error_Handler();" N7 a9 q. s5 _+ t
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- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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! X9 w; K4 e6 O$ u& k - Error_Handler();4 }3 Z2 C: x( q1 ^$ P
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- if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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- Error_Handler();1 w% ~6 w. E% B+ V' P% P( s
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- if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
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) O$ j, P g- W8 Z7 \9 S: i: R - Error_Handler();' i$ w( ]7 M( L4 f" c$ H
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- /* USER CODE BEGIN USART1_Init 2 */
1 W. c$ R& [' |! l2 U - #if EN_USART1_RX: O! w8 ~: I U" h. d2 V1 Y9 T; o
- 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 c# Z, i- S6 q0 W - #endif9 i; ?3 l& {2 n% b# l/ X# B) j
- /* USER CODE END USART1_Init 2 */# o/ t9 @" m" Q6 v
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- }
复制代码 1 r3 E, x8 k0 X, d
/ E2 k5 X) P7 L- u# K' m( {7 Y6 w串口中断会掉函数:+ E- @0 `2 `0 P3 z# j1 i
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)1 Y$ h! `8 s9 Z- J7 x7 ^9 T
- {
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- if(huart->Instance==USART1)//如果是串口1
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- if((USART_RX_STA&0x8000)==0)//接收未完成) z/ Z" ~; i/ P1 a" q( i
- {
5 d& Q, {& I# G+ m* c - if(USART_RX_STA&0x4000)//接收到了0x0d0 t+ p$ g9 x) E9 Z- G4 a
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- if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
0 W% @! ?. g' f( l1 b - else USART_RX_STA|=0x8000; //接收完成了
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2 V7 Z0 ^( h3 ~8 g f. S; t6 J - else //还没收到0X0D
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- if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;$ P5 D- }& ] |* Q) o
- else' l, X9 f! |# I( H
- {
! ~! M+ I0 m% `4 E/ L7 U" S - USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;
7 E6 Y6 |) E U1 ^ - USART_RX_STA++;2 O$ f. @' q+ {4 r
- if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收 % s1 m# G" o+ \" H" F9 \
- }
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- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);
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复制代码 delay函数:
8 H/ w( H; D. P+ c' N; Y- g S- void delay_us(u32 nus)1 M6 C+ C, G* {8 j$ ]
- {
1 n# T% n5 ]" _& z3 m8 u" ^, s: r - u32 ticks;
; `1 l* [$ w& P0 ]# z Q! C; r - u32 told,tnow,tcnt=0;/ y" b; @' ~ R* f% u* V
- u32 reload=SysTick->LOAD; //LOAD的值
7 T) I d( _0 F - ticks=nus*fac_us; //需要的节拍数 1 |9 z. X: E! v! B& ?+ m
- told=SysTick->VAL; //刚进入时的计数器值
# z6 p6 j! ~4 F* C - while(1)
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- tnow=SysTick->VAL; : o3 l9 X7 H* U/ v
- if(tnow!=told)
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$ t6 z4 @, `. N# o2 U - 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.
1 G5 ?4 d5 d* y2 x - else tcnt+=reload-tnow+told; # D) p% S$ H) j3 A7 N/ o
- told=tnow;* `$ t( Y9 @! q r2 R+ b
- if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.% G* `( d& M9 l" u/ b4 s
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- }
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+ N+ ] a: k+ ~9 ]7 c6 S( o - //延时nms
' C- s: V; s# [* \" X7 O8 Y* y - //nms:要延时的ms数 b- V7 v9 l/ j* Q- u5 v+ `
- void delay_ms(u16 nms)
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- u32 i;
6 W+ k' g P* C8 a0 d' A% b - for(i=0;i<nms;i++) delay_us(1000);
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复制代码 main,c
o' V5 G/ b0 }9 e- int main(void)( L+ s, L4 \8 n
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- /* USER CODE BEGIN 1 */6 r0 G2 n1 J2 a. C, W2 K- s
- u8 len;
, c* o# T7 j$ K) M0 m9 [! G: e - u16 times=0;! X! T& Y. f# ?# m h/ c9 Q
- /* USER CODE END 1 */8 |6 k3 f) {8 H" e
, @2 g$ Q, e2 r( [- /* MCU Configuration--------------------------------------------------------*/, z+ h( t0 U/ `' o p7 O- m
4 B. R- I/ b) T0 A+ m7 \0 t- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
5 a6 i0 E, B0 W1 s% r - HAL_Init();& ?' H0 X5 }8 O. K3 }! R# _
E3 R) n2 A( ]. @. a( E- /* USER CODE BEGIN Init */( K+ M1 h* J+ ~8 H
, _# @- g* u0 }; c, A- /* USER CODE END Init */; G N$ i0 ?0 C6 C- t2 [
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- /* Configure the system clock */! Z! J4 u& B1 q( E: L% I
- SystemClock_Config();
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- /* USER CODE BEGIN SysInit */8 s* \0 A" f) P4 z
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- /* USER CODE END SysInit */, h% `$ `. r- f& ]9 T Z
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- /* Initialize all configured peripherals */
* m. m' g# g- O/ C9 o: f, \* Z - MX_GPIO_Init(); n$ U& ?: W% C6 C+ Q* L
- MX_USART1_UART_Init();
& |* Y5 {. r! ^' T$ R - MX_SPI2_Init();% ~4 {+ h7 p1 t( s5 t6 \$ L" U& J
- /* USER CODE BEGIN 2 */
f/ H' Q# I/ q3 N E/ W! @ -
?* U4 o0 X. E5 ]& ^0 Q - //uartdbg_init(115200);
9 c# X4 w; [, g2 Z+ e5 s. G, x - delay_init(168); //初始化延时函数
0 V0 ?' p5 ^. g - uartdbg_init(115200);* L' c( I3 z# |$ l8 ^
- LED_Init(); //初始化LED 0 R, i0 W! U* Z/ \
- /* USER CODE END 2 *// f: ~- r9 ?4 z2 X/ M8 p7 e# m# e
0 k9 y# E! ^4 |9 [. o: C- /* Infinite loop */5 P+ x' w7 B9 z2 p8 ]3 K6 h8 W3 F
- /* USER CODE BEGIN WHILE */% d, z3 B' z+ g: y6 m' O' _
- while (1)
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( g3 S) o% b+ R; D1 s: \: }- if(USART_RX_STA&0x8000)) D6 Y) P$ t; v- v) u. a t ? J
- {
2 O# J0 R V2 b* s - len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度
& R2 `/ A" N; X( Z/ x& p - printf("\r\n您发送的消息为:\r\n");
& a9 ?5 X$ v, u, u7 F( p" Y# S) f - HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据5 L/ E6 z: \; \" Q8 _' _" \ S5 t
- while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束) {# [( S% a9 }7 g& E4 n" w& S# m
- printf("\r\n\r\n");//插入换行( F, ~4 t; g7 d5 t0 u
- USART_RX_STA=0;
7 Y. H& d# n5 t0 u q7 X - }else
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, `+ @2 I# g5 W9 O& n' x - times++;
" }$ J; _, t$ _. v" p% g - if(times%5000==0)
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- printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");) B- a& e$ a1 M! N3 B/ M" F5 b
- printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");
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- if(times%200==0){printf("请输入数据,以回车键结束\r\n"); } 1 `# D# M* u1 i3 C2 e$ R+ n
- if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.
2 b! n* k) A8 I& v4 f - delay_ms(10); V+ O) s8 m0 P/ ]
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- /* USER CODE END WHILE */
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% f# q5 Q' @& C1 K- /* USER CODE BEGIN 3 */5 t/ @' @3 q9 q4 ?4 ]3 a
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- /* USER CODE END 3 */
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复制代码 下载后,串口响应:2 o* s) c& ~+ Q+ i+ v2 L l+ `4 r
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好了,模板就到这了~
+ m3 Y3 w# L$ t$ U" e- a/ Y代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 5)
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