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~
6 i- O: k6 K% l& @/ {8 x% s: F, z作为B-U585I-IOT02A开发板之自用程序模板~. S! K [% F; W4 ]8 ?, b
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~. A9 j/ d8 \5 r/ D Z+ H* W
并调了一个LED~主循环代码为查询串口,并输出输入的字~+ z) \ G0 Q* f
结构:5 s+ t5 d( i' O8 ~# Y
3 Q/ r! @* A' ]% nsys包含数据类型的简化定义定义及一些汇编指令~
6 r$ Q/ i% e4 F Y ~% Xdelay包含us及ms级别延时及延时初始化~
( A( }! C8 o Y! ousart_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~
/ q% n$ y) E- g, P串口初始化:
9 E; {, E/ M$ Z- void MX_USART1_UART_Init(void)! e3 K8 c! w& t7 Z
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- /* USER CODE BEGIN USART1_Init 0 */, `7 V+ y7 L) s, W
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- /* USER CODE END USART1_Init 0 */
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- /* USER CODE BEGIN USART1_Init 1 */
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9 t) N% N! @( v2 r$ H- /* USER CODE END USART1_Init 1 */
- [# }4 y% {8 U/ x9 u - huart1.Instance = USART1;7 f" z {) C2 p( X2 }
- huart1.Init.BaudRate = 115200;
4 k4 w# E. q$ t6 C' Z - huart1.Init.WordLength = UART_WORDLENGTH_8B;6 T' r9 S$ L: Y2 ]2 `9 p0 V3 Z2 A c
- huart1.Init.StopBits = UART_STOPBITS_1; k: z& N {4 P+ p
- huart1.Init.Parity = UART_PARITY_NONE;
$ H7 t0 k' w( D8 u9 ]- ]/ T" x3 b9 }6 l - huart1.Init.Mode = UART_MODE_TX_RX;! l/ u( P( Z9 ?3 ^4 q
- huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;# a6 i- w2 Z. L# ]8 i* V+ |
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;
, i, }6 W' O5 }7 j |. j - huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
2 I4 ?; y9 r S4 D( \4 q - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
) C4 {$ Y. W6 n, K5 b4 P$ c - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;0 [: i" ^2 [3 { M1 a2 H$ N
- if (HAL_UART_Init(&huart1) != HAL_OK)# g; e$ I* [4 t
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- Error_Handler();0 o6 z) d1 q& v9 h. }% j$ S* U
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- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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- Error_Handler();
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. X, j# h( P8 X6 M0 _! i( I$ g - if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)$ m2 g- a( o, A
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- Error_Handler();9 D8 C% o2 Q! Q* P0 p% x k. r0 z
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- if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)0 r3 G" X. `8 y2 k# F0 t/ m
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- Error_Handler();
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! g* C+ C8 r9 o$ |+ \ - /* USER CODE BEGIN USART1_Init 2 */
, U) l! Q& I& f1 o) I* I - #if EN_USART1_RX
8 [% K0 X' {+ x# q7 V* f - 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& W# @ o0 A9 H9 L& b' Z
- #endif
+ E& y0 g7 j% n8 _7 K% v - /* USER CODE END USART1_Init 2 */
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- }
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* d1 }/ ?$ A7 A( u; x2 G串口中断会掉函数:
4 E( T. q5 H) [; W& ^% P- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)6 i _" z% A; U
- {
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% s! h" Z2 H) A- if(huart->Instance==USART1)//如果是串口1* v2 f$ [0 i; b; ?4 W) E. p
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- if((USART_RX_STA&0x8000)==0)//接收未完成' e' Q6 J. x# f/ c/ f
- {
3 @2 G+ m# U' U1 u" ?: a - if(USART_RX_STA&0x4000)//接收到了0x0d
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, \: e% k Y5 Q5 P - if(aRxBuffer[0]!=0x0a)USART_RX_STA=0;//接收错误,重新开始
' j3 a7 w6 |# o' o8 J4 u) Z - else USART_RX_STA|=0x8000; //接收完成了
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- else //还没收到0X0D0 q' L6 z4 s9 N8 k( p, S
- {
/ F0 ]8 ]+ F8 T) T* K, R: i& g - if(aRxBuffer[0]==0x0d)USART_RX_STA|=0x4000;
$ Z6 H! T4 Z" L3 t4 s - else
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- USART_RX_BUF[USART_RX_STA&0X3FFF]=aRxBuffer[0] ;+ v( v% u7 q2 }# v* T" b
- USART_RX_STA++;
- F& Z2 }& O0 U - if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收 : G+ v1 M# z- M
- }
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- HAL_UART_Receive_IT(huart,(u8 *)aRxBuffer, RXBUFFERSIZE);& T* _3 Z/ x2 ] [1 w
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- }
复制代码 delay函数:" S, V5 s1 B" t8 P$ \% B8 D6 V
- void delay_us(u32 nus)
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- u32 ticks;' P) G4 I4 O" t. {$ G+ [
- u32 told,tnow,tcnt=0;
: e% H7 v! N. Z% y/ z - u32 reload=SysTick->LOAD; //LOAD的值
' Z$ D5 k0 @7 Z - ticks=nus*fac_us; //需要的节拍数 8 V4 K; ~' {3 o; _ l# m. J* L
- told=SysTick->VAL; //刚进入时的计数器值 v/ v: n: Z0 T/ G0 Q6 I4 k
- while(1); F! P: ^% W, h9 D9 Q9 c. u- Y
- {
* k1 X! \8 v8 H- h - tnow=SysTick->VAL;
- T% b8 j" I/ l) v - if(tnow!=told)* T, w# o4 j; i) x+ L# X& B
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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.
: U. d" M A4 e- q; E( i$ o& [ - else tcnt+=reload-tnow+told; 8 ?1 J" W+ j, e+ N
- told=tnow;
; X1 F& V: J) J% [" a) _! O - if(tcnt>=ticks)break; //时间超过/等于要延迟的时间,则退出.
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6 M% G/ l x8 c/ \# i1 R# r$ j: G - //延时nms
' R9 \! {! Q8 T% c: `0 Y2 E - //nms:要延时的ms数
* h" e j- U4 _8 A# L* O! @ - void delay_ms(u16 nms)% i/ ]# o/ R8 p
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- u32 i;
! b+ K. C7 _" h X, T0 }. W- } - for(i=0;i<nms;i++) delay_us(1000);2 q7 s. n4 ~1 M0 s3 p
- }
复制代码 main,c0 \9 a: r& L& w! c, r5 _
- int main(void)
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8 T% M; i/ E: k# x: b6 E) y* i - /* USER CODE BEGIN 1 */0 r+ }6 E8 I4 X: D
- u8 len; " D6 Y3 [/ b+ X
- u16 times=0;% |! e. a, k( f6 a
- /* USER CODE END 1 */
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- /* MCU Configuration--------------------------------------------------------*/( i8 _ q5 A9 R( g
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- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
9 V A' A) l! a2 M) R! T* D - HAL_Init();3 T9 K: q0 Y( K+ v
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- /* USER CODE BEGIN Init */
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! C5 y6 j3 w+ M5 ~4 }! _# v- /* USER CODE END Init */
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+ I3 B" x y2 q- /* Configure the system clock */
5 c1 m$ v6 ~9 h0 w - SystemClock_Config();
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* `" [5 B, U) m& N- /* USER CODE BEGIN SysInit */, F$ U8 u3 ?4 x0 ^$ S
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- /* USER CODE END SysInit */# O$ j8 B# x4 z+ j
$ {! m( K! `1 K4 }; ]* a& K( n, |- /* Initialize all configured peripherals */- X- `5 L& s3 ]. ~: y8 K& x; V
- MX_GPIO_Init();/ g Z, W: k& {* R+ q9 i3 |$ v
- MX_USART1_UART_Init();
+ D4 _! s# {9 C# l" C+ n3 n! v - MX_SPI2_Init();
2 v- C$ B' v/ U - /* USER CODE BEGIN 2 */" _7 i* i4 s* f/ w" w( L, ^
-
, A4 A# o! T9 I$ r# x - //uartdbg_init(115200);' d0 ]/ z* F2 o) Z3 L9 V
- delay_init(168); //初始化延时函数
9 j" X/ n- _3 ^! N$ A - uartdbg_init(115200);0 G( ]: n' j4 C/ ~
- LED_Init(); //初始化LED
& T+ p4 T) t; z2 q - /* USER CODE END 2 */7 ^: N9 P1 N* ]% k
$ d- z6 t: O/ y+ h% d/ C- /* Infinite loop */
9 M5 C1 P) b9 j3 G - /* USER CODE BEGIN WHILE */* k2 g) i5 ~: r( u5 }
- while (1)/ \1 \4 _( Y# F# e9 b0 m: G/ Y$ ]
- {
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- if(USART_RX_STA&0x8000)
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: |5 k5 K( M# f( ?8 c) o - len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度
' ?, p+ Z4 L% e1 s5 U - printf("\r\n您发送的消息为:\r\n");! w% P- d/ p! A/ S" _- T
- HAL_UART_Transmit(&UART1_Handler,(uint8_t*)USART_RX_BUF,len,1000); //发送接收到的数据
" S1 u5 {5 w. w& b - while(__HAL_UART_GET_FLAG(&UART1_Handler,UART_FLAG_TC)!=SET); //等待发送结束, e `; ~# r9 w
- printf("\r\n\r\n");//插入换行4 k- W! J9 |, `+ }! t) o# w
- USART_RX_STA=0;
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- {
2 H. o' A' i5 n& L2 G7 S1 O - times++;& z. i/ m1 n: D k, N
- if(times%5000==0)/ q0 N' t! t7 O/ Y
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- printf("\r\nSTM32F417_COREBOARD 串口实验\r\n");
, T/ p% C/ Q( P4 o8 k4 O: w - printf("胤幻1988@ST中文论坛\r\n\r\n\r\n");: x$ F1 U" q/ r
- }; g0 y: b. I2 I- D" N# Q6 D' }
- if(times%200==0){printf("请输入数据,以回车键结束\r\n"); }
. R, ?( }1 Z, k" y) q# E- A1 z - if(times%30==0)LED0=!LED0;//闪烁LED,提示系统正在运行.
6 \ ^: q0 [6 o' u* b8 t& z - delay_ms(10); " K4 K6 V. ~, Y( ]' }, p
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- /* USER CODE END WHILE */* b8 Z1 U9 ?. u& Q* z1 f, d) l
' x" q7 @/ |* J% E- h# f- /* USER CODE BEGIN 3 */2 ~$ [( }# `0 ^1 a' I
- }
; s* |1 P$ w3 V7 q% ^ - /* USER CODE END 3 */, W' x7 Y9 E7 H* H$ C. A
- }
复制代码 下载后,串口响应:/ A8 w; C( W& g# |: x) {0 Z
$ M/ q' H1 N( u9 a8 y5 b) I' p好了,模板就到这了~& I t% l1 r' U* L
代码:
STM32U585AI_DEMO.rar
(14.94 MB, 下载次数: 1)
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