这几天一直在捣鼓板子,查资料现学现卖,觉都睡不好,一遍熟悉知识点消化,一边总结。做梦都在搞板子!由于第一次使用Hal库,第一次使用新的编译器,又在LL库的边缘徘徊,期间又切换到RTTstudio。 最初几天串口没有调试通,很郁闷,看到别的小伙伴一篇篇的优质测评帖,我心里急啊。今天,我的第三篇测评,他终于来了!
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1. 首先,来个驱动讲解吧,这里要注意的是一个回调函数,我们基本不用管就行,但是和初始化函数长得很像,初学者容易搞糊涂。
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那么我们在使用的时候,main函数中调用A函数初始化即可。
[- Q# W. ^* I7 n5 zC函数为回调函数,其他外设初始化的时候也会自动产生,C函数已经被B函数调用了!B函数在HAL库中。
7 K( ~( z' ?" S这就是三个长得像的家伙的关系。0 t' X6 L8 i; A+ c" V4 X6 V9 {
CubeMX有个特点,函数前都不会有啥注释的。哈哈。
+ l7 g3 |& r2 z0 h下面就是初始化代码了,这个是CubeMx自动产生的:, A2 E$ ]( l+ V7 @. v1 S9 H
4 u+ n% W9 [1 G5 M" ^- #include "usart.h"& {9 k* k! d+ g* s& _; O6 w0 M0 b
- 8 l: U+ u8 e7 R) S$ D" w# u
- /* USER CODE BEGIN 0 */, v1 c" @2 } h3 w7 x
- $ ]/ z- `0 ~* }$ [9 x
- /* USER CODE END 0 */. Y% `5 A3 y4 G9 `
- 0 d* ]3 m! @6 }6 y+ I
- UART_HandleTypeDef hlpuart1;: w$ q1 v7 `% e1 f; ^: l
- UART_HandleTypeDef huart1;* `* u+ b: s8 j- }3 [8 X
- . k8 d$ }3 V4 ~8 }
- /* LPUART1 init function */* c3 [( T$ ?9 m7 t
6 p9 A; r+ R: ?! j- void MX_LPUART1_UART_Init(void)
& [6 C0 u+ \& m9 V7 m( s+ ~& V# F% u - {+ F2 Z: H9 V/ \# [6 ^2 g8 N
- 1 M5 R9 W' w6 p6 j! X- w1 N t
- /* USER CODE BEGIN LPUART1_Init 0 */
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$ m, }; @: ]* G# N1 H- /* USER CODE END LPUART1_Init 0 */
* F+ _3 L0 F* v& l: K3 j1 A5 K9 g - & q2 l5 x% o$ K% R
- /* USER CODE BEGIN LPUART1_Init 1 */
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1 k: i) k/ q$ e- `- /* USER CODE END LPUART1_Init 1 */; |3 G# j4 g2 w8 t( j9 x
- hlpuart1.Instance = LPUART1;
1 P: x. D" q) L% y' l: P. ? - hlpuart1.Init.BaudRate = 115200;
% c: V5 V! Y* r9 J! b8 y - hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
; s- e( i# x7 e3 `' E - hlpuart1.Init.StopBits = UART_STOPBITS_1;$ E# ?7 `0 D+ \! f% C. g
- hlpuart1.Init.Parity = UART_PARITY_NONE;
# Q b) M" z6 p6 p; Z# c6 E& q - hlpuart1.Init.Mode = UART_MODE_TX_RX;
8 r/ }& h( H% Q: g I - hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;2 c/ [, c2 ]7 l/ R w9 _
- hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;; e! O) B* {: \: G% l' e
- hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;; O1 [, I: `0 A" y6 f8 h
- hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
7 _! U! n/ l$ ~5 l1 _ - if (HAL_UART_Init(&hlpuart1) != HAL_OK)! B- x% u* S0 d! I4 Y( L) ?
- {
2 |3 A3 e4 [/ }( o: ` - Error_Handler();
' T& A! m% [2 H) I - }
" D3 `) k% n6 ?9 P# D2 q1 X9 m - if (HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)- O* Y- d: _ N2 x4 @
- {
; T1 {5 R6 L" V! F - Error_Handler();+ J: L. `- R0 p- ~0 d4 b
- }2 {* n3 j3 c9 p/ P- P7 A& q+ `7 n
- if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
: D5 n. Y( u; k# u, e @8 S - {0 k/ A8 S1 l' s8 o" K1 a. e
- Error_Handler();
+ V0 |: D* e) i - }
4 e& k0 R( x; K6 G - if (HAL_UARTEx_DisableFifoMode(&hlpuart1) != HAL_OK)4 i" m( b' r/ `+ K
- {7 P f9 s; k3 j* i' N
- Error_Handler();3 D8 `" r$ i8 n. ~2 u. b7 f+ M
- }6 c0 y+ ^. L* Z7 i# N9 _; q" f
- /* USER CODE BEGIN LPUART1_Init 2 */2 i8 N$ [+ m! K0 g ^" p1 R
4 r F4 ~4 Y( R. T. \- /* USER CODE END LPUART1_Init 2 */9 X9 b; K( _5 J9 i; Q+ l& _5 H
- 9 S0 C% V5 `6 M) R" @$ w! Y
- }. F9 s9 h3 e$ ^. H& }& q' A
- /* USART1 init function */
* U1 M) P5 u! C; O9 K
: R4 K% a# u* h2 f- E- void MX_USART1_UART_Init(void)8 T9 l; R. D. u' J8 J
- {
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$ l' d* W) _: v" g# y- /* USER CODE BEGIN USART1_Init 0 */: W& S1 c& z$ L! y( D! a
4 B" e" I/ P( |( p- L- /* USER CODE END USART1_Init 0 */0 T$ h& l4 t* N6 o
\0 l& @" p6 R2 X4 l5 P- /* USER CODE BEGIN USART1_Init 1 */% C8 P# ?; h' R6 ~% \$ m
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- /* USER CODE END USART1_Init 1 */6 I- Y: f( }! V! l* b
- huart1.Instance = USART1;' _( N2 M7 q6 k4 t! p3 x
- huart1.Init.BaudRate = 115200;
6 o. s) g8 L1 i4 p: M - huart1.Init.WordLength = UART_WORDLENGTH_9B;
7 P- h2 j* j% G: O5 ~ - huart1.Init.StopBits = UART_STOPBITS_1;6 d. R- Y6 z3 ?) v1 ]
- huart1.Init.Parity = UART_PARITY_NONE;
4 r- f0 H4 G9 Y: P2 ^- ^ - huart1.Init.Mode = UART_MODE_TX_RX;: I; b% a' k5 Q( a9 H
- huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
/ O" O. |, p% Q, K. r - huart1.Init.OverSampling = UART_OVERSAMPLING_16;& A* Y% Z9 |3 b. |% W
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
' P( d. g$ H+ |1 w0 F+ R4 U g - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;/ P" z+ S1 e2 P2 L
- huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
0 L( U) }" f) C y - if (HAL_UART_Init(&huart1) != HAL_OK)
8 F. S" [/ |6 K% A2 B - {
& C3 E8 R0 \! m3 ` - Error_Handler();
1 U F$ ^- E3 Q5 P6 \ - }
6 ]! {( f9 s0 {2 n* j) y - if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
' u5 Y7 M l R" B - {
: h8 ^5 u/ A. ]4 d% z% ?- ~2 e - Error_Handler();
/ [% t3 w4 E# y7 B# y i$ C - }
/ B* j, X7 a+ K/ v, X) h4 Q - if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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, m& o6 ?: S# M/ h! W5 Z# u - Error_Handler();+ g$ U) a9 a$ D% i$ g# f x' r
- } B$ b& F7 o* Z. c' y0 R; G0 b2 h/ J, Z
- if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)& x- {) ^0 E S
- {6 z6 h8 p6 k! `3 z3 b' a
- Error_Handler();
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- /* USER CODE BEGIN USART1_Init 2 */
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; n4 G+ z; V# ~ A- /* USER CODE END USART1_Init 2 */8 N! a! z% y/ j: o* c; P
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- }
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- void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)% Q# U- U% S) s1 Y! \3 V1 [( n
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- # U( `" Y+ W2 }% Z. h
- GPIO_InitTypeDef GPIO_InitStruct = {0};0 G% }4 g: b1 Y
- if(uartHandle->Instance==LPUART1)6 t& Z8 K" q4 N) Z* U; y
- {
! \& \6 E" Y- z: M - /* USER CODE BEGIN LPUART1_MspInit 0 */
% Y# |( P/ t2 h/ e - + L, g+ f/ ~+ V, Z
- /* USER CODE END LPUART1_MspInit 0 */+ r$ X; i0 |1 V% E" @) G3 ^
- /* LPUART1 clock enable */, U( N+ L. c2 @/ F5 C# k( n
- __HAL_RCC_LPUART1_CLK_ENABLE();
- c0 L4 H! E5 _5 ^
* ^4 o9 V1 I7 E$ }) ~: m- __HAL_RCC_GPIOA_CLK_ENABLE(); D% e' l0 A- U$ P! f# a
- /**LPUART1 GPIO Configuration
% _9 V& y/ C5 U$ @0 z9 q6 e - PA2 ------> LPUART1_TX
/ W- t% W+ P8 f1 t# k" `& {$ H - PA3 ------> LPUART1_RX
3 ]! M1 m5 M8 c; `, t+ B: j - */
! v: E$ l& B5 ?2 ^2 n% P+ M( W% L% W9 D - GPIO_InitStruct.Pin = LPUART1_TX_Pin|LPUART1_RX_Pin;7 u7 z! S: c5 c: ^+ \- X3 `
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;* M- }, b. M' M) v
- GPIO_InitStruct.Pull = GPIO_NOPULL;
0 k1 U" Q; Q1 ?9 h* f" Q - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
' H4 e! R/ d' h g$ c1 C: H0 D8 I - GPIO_InitStruct.Alternate = GPIO_AF12_LPUART1;
* u% L; B! }6 l3 _6 B - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
* C2 T% X) |8 F7 ?+ Y" ~9 C, R - 2 x! ]( W; Q$ Z: Y0 @1 c7 g
- /* USER CODE BEGIN LPUART1_MspInit 1 */
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" z: h& x* I6 r) @2 Q3 J6 ~- /* USER CODE END LPUART1_MspInit 1 */+ t8 k# a( b& w6 r
- }
' m5 q8 R8 [0 V - else if(uartHandle->Instance==USART1)
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2 `+ |7 J2 d0 ^, Z: E5 t - /* USER CODE BEGIN USART1_MspInit 0 */$ T" d& k3 L* [5 ~0 H9 Q
- ! z: q/ V( ]% [$ t0 r4 P
- /* USER CODE END USART1_MspInit 0 */
& Y' R: `2 A v# l2 Y; o2 W - /* USART1 clock enable */1 ]0 X j1 g4 W" `% }' b) F
- __HAL_RCC_USART1_CLK_ENABLE();- x! ~0 J( S! B% H1 z. d6 u
- " u7 D0 z$ P/ i
- __HAL_RCC_GPIOC_CLK_ENABLE();& I& a+ i; b1 P% H2 W ~# G
- /**USART1 GPIO Configuration
) ], J Y l" r( `. z - PC4 ------> USART1_TX
" X' I+ W! C% s) W$ e6 B& I+ r) A - PC5 ------> USART1_RX: ~8 f8 Z9 i5 u& r% I$ L! h
- */
: C: a* y" ]1 w1 c% h - GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
. {! E, W' ^$ K - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
. u: ]0 B N4 U4 G* d1 ^ - GPIO_InitStruct.Pull = GPIO_NOPULL;
/ e" W& ~5 X: i% K - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;8 I7 J; I/ |+ c6 P
- GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
5 g$ y% J- G" ?! }4 o+ C; T7 I, g - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);5 M# N) j2 K' M! Z
5 E8 O6 r4 l: V8 P- /* USER CODE BEGIN USART1_MspInit 1 */
+ v$ I$ r7 I4 n5 g+ X+ v( m - $ @6 x4 ` k% n- s- |( K& `
- /* USER CODE END USART1_MspInit 1 */
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- % ~. v6 J/ S0 c: V7 J T O, V
- void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)5 X% y) J1 {4 R+ m" Z) f T ^
- {; c7 e& M: h2 \; S
- , b- ~ S T- X2 Y
- if(uartHandle->Instance==LPUART1)& N. j( z6 a/ g7 f
- {
8 N7 K K. v; N8 `" m - /* USER CODE BEGIN LPUART1_MspDeInit 0 */* u/ w; S$ W9 s2 `0 i. o0 k/ b1 e
- # ~$ Z( h, J0 \. [+ I9 k
- /* USER CODE END LPUART1_MspDeInit 0 */6 w/ V" v3 h, U; V! `
- /* Peripheral clock disable *// d3 |& l. l9 Y/ U; J' S) Q6 ?
- __HAL_RCC_LPUART1_CLK_DISABLE();
& m& j3 a5 U3 G" K) o: L' ]
4 P: V" h! A1 {- /**LPUART1 GPIO Configuration
8 X+ V1 x+ f- @ - PA2 ------> LPUART1_TX
4 E' |/ k1 v. e - PA3 ------> LPUART1_RX# h# _" B* y, ^) W
- */2 @. F/ z$ a" d- c4 P R/ b
- HAL_GPIO_DeInit(GPIOA, LPUART1_TX_Pin|LPUART1_RX_Pin);
+ a2 b, J' s* |" w/ t% m, M
{# G* s5 R8 C- /* USER CODE BEGIN LPUART1_MspDeInit 1 */
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- /* USER CODE END LPUART1_MspDeInit 1 */
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- else if(uartHandle->Instance==USART1)
- y6 a7 J+ x% I- E+ r& C) z3 d - {
+ E0 ~1 G# ]& H8 ~ |0 n0 A2 T+ b - /* USER CODE BEGIN USART1_MspDeInit 0 */: Y& E2 B, I- q
- / q. X' j# V6 n: u) p9 \" w0 ]' J
- /* USER CODE END USART1_MspDeInit 0 */
9 v1 C$ t2 i' r. O - /* Peripheral clock disable */0 l' g& r/ ]$ K* z* M# y% F: j
- __HAL_RCC_USART1_CLK_DISABLE();
0 d0 x! o: _7 l2 h' M
) y9 T2 E+ J9 \# x- /**USART1 GPIO Configuration) G, H9 {* `' z8 I5 R; [
- PC4 ------> USART1_TX Y1 C, L. M0 y4 @% |, N
- PC5 ------> USART1_RX6 M' j0 J$ f0 T- R3 b
- */& N8 e) k) a# U1 |* {
- HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4|GPIO_PIN_5);3 L& k' \: r8 _* e# }. }
- ) R6 c+ i8 o6 ^, g m! j* z1 ~% e
- /* USER CODE BEGIN USART1_MspDeInit 1 */
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- /* USER CODE END USART1_MspDeInit 1 */
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- }, g9 {3 m7 _! |0 @0 l2 u% G
复制代码 然后:重点来了:这个部分还是要自己添加才行,CubeMX还没有达到100%给你写代码的水平哦:
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! o, e3 ?+ f$ s* q2 I- /**
* g |8 ~5 `2 s. M6 X' ?& j+ g. B8 ~* X - * @brief Retargets the C library printf function to the USART.& {/ o& {; s+ |( f7 t: C* u! s, G7 s' W
- * @param None
8 J( e6 m2 O$ u. b* p - * @retval None
' @4 t m% ]0 T, | - */$ v0 A9 P+ D# j: a, j* d u4 p7 V6 ?
' j1 N& |( ~( `! s) x0 a. e/ y r+ f- #ifdef __GNUC__
. I- Q& l3 N! a! U: l( w4 F - /* With GCC, small printf (option LD Linker->Libraries->Small printf7 m; H8 ^$ p: ?% T m% E4 G
- set to 'Yes') calls __io_putchar() */4 p) f; Z9 C; N& ~: n. v& P
- #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
4 e0 F* K1 U3 A5 D+ t0 Q - #else
; e8 l" S: _) C/ r$ _ Q$ K, N - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f); {9 Z" b I2 B7 e" f! g) b
- #endif /* __GNUC__ */& X' h3 `3 q: l' e5 B! r8 s
( c& v P& _+ }1 K5 B3 o- PUTCHAR_PROTOTYPE p2 A9 G8 x2 u. n: u6 Y% N
- {
& v+ O9 |" Q; k% G - /* Place your implementation of fputc here */( G' M# U2 b7 @2 j$ B6 l7 H1 n
- /* e.g. write a character to the USART1 and Loop until the end of transmission */
' `9 p8 f+ }5 [. ]7 g) I. Z - HAL_UART_Transmit(&hlpuart1, (uint8_t *)&ch, 1, 0xFFFF);
3 |+ [- ]$ L: w8 \. s - return ch;; e9 {+ N3 M0 D) j2 r# H
- }
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复制代码 整个工程编译下来占用空间大小:
+ F+ d9 y5 U! |# s==============================================================================# y+ y2 Q# c! Z& ]4 y2 X
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$ [2 q) B$ ^4 Z! W7 @ Code (inc. data) RO Data RW Data ZI Data Debug * j" G0 h( I1 w* ?" |/ @' D: {
( [# D# B0 V ^ D; e1 R
8204 434 568 20 1316 691029 Grand Totals. M+ e7 o: b+ I: X2 B% @0 h' G
8204 434 568 20 1316 691029 ELF Image Totals
; k, M% o& c4 L: @& @) r3 w 8204 434 568 20 0 0 ROM Totals
7 b6 y! R% t' f; f/ @/ G
" `9 F6 Z9 K" C* X7 i. ^- t3 \==============================================================================
7 _4 w0 ?( ]# t0 {$ g8 ?2 h( _4 w/ n- x5 v3 i7 h
Total RO Size (Code + RO Data) 8772 ( 8.57kB)
: R8 W4 F; K( T' Z+ p* Z: H4 N Total RW Size (RW Data + ZI Data) 1336 ( 1.30kB)
- Z( W) i" Y; f+ W: J9 x' X Total ROM Size (Code + RO Data + RW Data) 8792 ( 8.59kB)
4 c3 ]4 _* f1 U# C0 h. D! P
" K! T2 j# t2 v `* H" x# `==============================================================================& h8 v+ }% D& t9 L( E* a6 n; [
! p& V1 I* [9 `! x% ^" b3 y
2 w# W, l0 j3 e) P" ~ {
- L" i5 f% o, {6 B& g最后,看看效果如何:
- U3 } J* m5 r* _) W* \; h
1 ]& M: X0 O" o) x+ N9 @2 Q Z
非常完美!
+ k" p, s8 N9 S6 T6 V8 S整个工程代码见附件:/ n* K* ^( j' l7 w# d' c) {9 R% h
STM32CubeIDE.zip
(1.4 MB, 下载次数: 2)
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