1.串口1 USART1初始化 [注意使能接收中断]
7 h% B7 @* L" j T) [( ]. i- /**
( o5 R5 C( X& e - * @brief USART1 Initialization Function" g' p" e7 N( ]" c" z
- * @param None
% ~& Z/ S |" }1 x2 \& s! \8 ? - * @retval None
; j5 D5 ]1 p/ G0 V7 V3 w- j+ [' @ - */
1 b L; D: X$ |7 {, x - UART_HandleTypeDef huart1;9 x7 F( v7 W% Q% L! c8 R
- void MX_USART1_UART_Init(void)
8 w* j6 S7 u; b6 T+ D/ a6 G - {* w- ]3 y3 a9 `7 X C6 a; T: w [
- huart1.Instance = USART1;
1 z1 k1 _$ ^7 i7 x* R' m - huart1.Init.BaudRate = 115200;
! f+ c* J7 I( t+ O* W; o" q5 L- @ - huart1.Init.WordLength = UART_WORDLENGTH_8B;- p- H' E; x* s# G
- huart1.Init.StopBits = UART_STOPBITS_1;
8 h0 g8 u6 b x6 W" c - huart1.Init.Parity = UART_PARITY_NONE;
# I1 S3 M) b# Z - huart1.Init.Mode = UART_MODE_TX_RX;" T- X2 v; _2 ?" f# @) |5 }
- huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
1 m, }/ \3 x# }# i - huart1.Init.OverSampling = UART_OVERSAMPLING_16;1 @4 Y% P, h+ ]+ m3 L a* r$ U3 L6 z
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;7 ?4 P, C' f8 w9 f0 F/ l
- huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;8 }, N7 E6 B, p1 l! T H8 `9 g
- if (HAL_UART_Init(&huart1) != HAL_OK)
9 y5 N" ?0 d8 P6 T$ u- k - {
2 g0 t4 D; S" ] - Error_Handler();
1 s' t0 l3 T7 r* @, c - }0 g/ k% K0 D6 g7 T
- //使能接收中断
" S ]! r! J, \ - HAL_UART_Receive_IT(&huart1,usart1_RxBuf_temp,1); // Enable the USART1 Interrupt
3 c1 L) V8 ? U, m - }
复制代码
$ @! |1 z0 A ~+ Z2.串口接收中断
) ]8 F2 x5 J6 w" e- /**
0 h) z# `& _# h8 u7 t) S: l5 Z - * @brief This function handles USART1 global interrupt / USART1 wake-up interrupt through EXTI line 25.* D1 f; N1 q- N; d! r4 H) {
- */% ]( H, B/ v" o) h c, s7 w* [+ @( H$ \ |
- void USART1_IRQHandler(void)
U0 J3 S' C p2 }' z8 o - {. k% z1 c/ F6 m# h o) w' N$ q
- HAL_UART_IRQHandler(&huart1);
: r c D, b4 l; `2 u! ^1 k4 u - }
复制代码 ( J5 u) Q0 C% u, X* I. ^
3.串口接收中断完成回调函数
" Q ?) ?7 Z6 C3 X" L- /*** G1 x* [8 ]( L8 v! N
- * @brief Rx Transfer completed callback r# M" J/ t t* M1 c* i
- * @param UartHandle: UART handle2 h8 o# I$ O7 q$ e2 k4 H9 z
- * @note This example shows a simple way to report end of IT Rx transfer, and
k( S3 E$ Z. ~% X7 W& C2 Y4 e - * you can add your own implementation.' T; s( ~( z6 N% x
- * @retval None
) x- g3 u) o/ K4 Z1 S - */
8 y- G1 t6 P4 ]6 B2 a7 d, g5 T0 A - void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)% a# L3 U. n* F: V
- {
m0 T K1 B/ ^) q d - if(UartHandle->Instance == USART1)
- {2 W5 m/ ]( {* P - {9 U* M" i% G7 g
- Netctrlp_Receive(usart1_RxBuf_temp[0]);6 F: u. Z7 d; M9 ]7 Y1 h
- HAL_UART_Receive_IT(&huart1,usart1_RxBuf_temp,1); // 重新使能串口1接收中断
' [/ V- b# y# B9 f" K7 A( r - }8 F1 a7 U3 ], [8 ?
- }
复制代码
/ |& i" d8 {- n- ^4.重定向输入输出,将输出重定向至printf
: O6 J A5 r8 i6 d- uint8_t ch;( L t5 N0 O6 i- c' H1 }4 c" N
- uint8_t ch_r;; b1 F! b6 v% Q
- //重写这个函数,重定向printf函数到串口,意思就是说printf直接输出到串口,其默认输出到控制台的
" h! k8 ?* o! x9 u4 k - /*fputc*/ [3 F3 x. t B3 {) c# ?( Z7 y- g
- int fputc(int c, FILE * f)
9 r& _# D# [3 N; L2 | - { a7 F. f7 H8 l0 Z
- ch=c;* \. Q" x+ L3 f; ~
- // HAL_UART_Transmit_IT(&huart1,&ch,1);//发送串口$ e! \5 h0 [( v3 B% L7 s2 ]
- HAL_UART_Transmit(&huart1,&ch,1,100);//发送串口
5 Q N% Z5 j4 \9 U - return ch;( h" U5 s. t9 y* q3 ?: N; S
- }
" J' n: M7 D4 z7 l( r( h
# W1 d9 T) j, L& }" D' S' w- //重定向scanf函数到串口 意思就是说接受串口发过来的数据,其默认是接受控制台的数据
2 z5 G n5 A' ^9 x5 J, K( Y7 k - /*fgetc*/6 ~# J. Y) x" `6 a& H0 a
- int fgetc(FILE * F)
, Q7 |! ~ \5 e1 Y6 |* ~ - {
, D; M) l3 H( Z) i7 {$ W - HAL_UART_Receive_IT(&huart1,&ch_r,1);//接收
$ p; B+ G- n ^2 O; P$ T - return ch_r;
& e, L% X- O$ ~) e1 v) \, j; f" k; n - }
复制代码
( W6 E" Q8 d% O6 j, `( ?! B" U; I5.main.c 主函数
2 [% c6 K- s4 F% j- int main(void) //SLAVE
! G/ Q4 m) g- t) `4 { - {% l% r$ U4 l+ ]3 K! U
- HAL_Init();
, u: b( u" O# `/ f7 B* G - /* Configure the system clock */
1 `4 K" p7 y* Q. M - SystemClock_Config();
! r; d6 m# R0 D8 p/ I - MX_USART1_UART_Init();
1 A- P: p7 W9 \ - 1 I4 W: R6 m1 t1 b: R
- while(1){
1 c, s* r9 T$ Y B( W" s - DBG_print(DBG_DEBUG, " A.");
# F7 M" I3 l" |2 h - HAL_Delay(100);" J) m% W8 s# i2 P3 x
- }* w; O6 w* C* C. g1 K% S
- }
复制代码
! e( R! U) a" X1 \2 R3 F# C
`6 u* F q* K4 f' f- k) a* X( I/ h2 _' N3 c, y' H! ?
|