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!1 p+ V F# D0 x
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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。8 {) s8 k. N& e! L
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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。' K, M+ C* e! l1 w3 U
C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。
( ^+ T6 A7 T; _1 E& y1 x* [; Z这就是三个长得像的家伙的关系。" Z+ ~/ q% p# A' i/ K
CubeMX有个特点,函数前都不会有啥注释的。哈哈。5 t: \( y9 L2 t
下面就是初始化代码了,这个是CubeMx自动产生的:* [$ g3 t }; D3 @3 _1 P
( r! L2 G- W; P! `8 o# U- #include "usart.h"* h6 E" w+ ]8 I
- ! p5 Q9 z6 d' o3 v; ?
- /* USER CODE BEGIN 0 */- j6 S3 r' N" S( N: N+ p O
5 D) i! ]* ~% l: `- /* USER CODE END 0 */# i2 b; _4 F S
- 8 N( @* g: M' E6 `& k' ~6 l4 j
- UART_HandleTypeDef hlpuart1;
- N* S4 s* F* F+ h: c! T - UART_HandleTypeDef huart1;9 n/ ~6 ]& F3 w0 v6 w4 _) Y. e+ ?
- \2 E) P/ R2 W, Y* e
- /* LPUART1 init function */
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- void MX_LPUART1_UART_Init(void)
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% F/ Y5 z, P+ [* L0 B; |- B: B- /* USER CODE BEGIN LPUART1_Init 0 */
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- /* USER CODE END LPUART1_Init 0 */! d; V4 X* R1 o0 a: Z
- {& B9 ?5 U( f7 S a9 Y' u- /* USER CODE BEGIN LPUART1_Init 1 */
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- /* USER CODE END LPUART1_Init 1 */- `3 { ]$ ]0 ?* t2 I
- hlpuart1.Instance = LPUART1;+ P. w5 A6 P- `0 m" d0 a9 `
- hlpuart1.Init.BaudRate = 115200;# a9 L. x; Y; o* b: I. [$ c G. R
- hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
$ K. y' Q# s7 H) H$ e3 _; V - hlpuart1.Init.StopBits = UART_STOPBITS_1;! V( ^ c& F7 V) d
- hlpuart1.Init.Parity = UART_PARITY_NONE;* f" P6 {9 Y' _5 _. f. v/ D# |! Y
- hlpuart1.Init.Mode = UART_MODE_TX_RX;
9 r5 F# F/ _9 e8 \ - hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;2 K4 S) X8 m" n% I) y5 o8 @
- hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;3 j E0 e' \1 b) _" x V
- hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
9 D7 @0 l- ?2 y' x) m/ P - hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;+ r7 a- U& w; D! s9 o# H* h! i4 N
- if (HAL_UART_Init(&hlpuart1) != HAL_OK)
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1 f0 ?+ a* N2 t/ |6 ? - Error_Handler(); `1 t Q7 I. N
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- if (HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
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- Error_Handler();
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- if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
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0 H' l, T& \" \; ] - Error_Handler();
3 J4 r, d: { _- z - }
) u# O* _" _- f+ @3 y3 w# C2 G, P - if (HAL_UARTEx_DisableFifoMode(&hlpuart1) != HAL_OK)7 M7 l6 S* s/ |; a+ k6 p1 a
- {: D; ^3 r/ I! K& A4 ?2 e5 c9 [
- Error_Handler();
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- /* USER CODE BEGIN LPUART1_Init 2 */8 N* p2 j6 e- {# A% l6 i! w8 T
- + S% \9 k6 U- a+ J
- /* USER CODE END LPUART1_Init 2 */1 r6 w' c7 X; G
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- }7 z1 o$ G( ?, L9 _$ v( j
- /* USART1 init function */
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- void MX_USART1_UART_Init(void)
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- /* USER CODE BEGIN USART1_Init 0 */) b. y# Y( o+ W# H$ ~" x
- 2 _0 F8 ~$ c# d5 P( y, }
- /* USER CODE END USART1_Init 0 */
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- /* USER CODE BEGIN USART1_Init 1 */3 r# [! k7 O% ]1 s
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- /* USER CODE END USART1_Init 1 */
5 H: W" D% B( ^3 U - huart1.Instance = USART1;. J- t v* h4 {% q ^6 O. [( Q
- huart1.Init.BaudRate = 115200;8 a2 U# D* l/ J/ |6 T2 I
- huart1.Init.WordLength = UART_WORDLENGTH_9B;
" V7 \8 g7 @9 Z% w - huart1.Init.StopBits = UART_STOPBITS_1;* m9 q F2 W7 }/ w( \
- huart1.Init.Parity = UART_PARITY_NONE;7 H% F' ] [7 e; W, x3 A! U9 @
- huart1.Init.Mode = UART_MODE_TX_RX;
+ C* P4 k/ @7 ]( j1 C - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
( S4 P8 i) L+ U% y' m) l - huart1.Init.OverSampling = UART_OVERSAMPLING_16;
+ S: k; B, V% x# H. ^' d - huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
! s6 I( p3 J0 P$ n - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;2 [- O) V+ G/ C2 `
- huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+ w8 \/ J2 t3 S: q/ a) G - if (HAL_UART_Init(&huart1) != HAL_OK)
' ?' U9 a K* V% U - {
/ S4 r" ^* o: a8 i& k - Error_Handler();3 H ? ]( f# Y* |
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- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)8 x+ a. J3 M6 `# ?( J* w
- {
& f f: @9 e! r/ H5 _7 e( m- x& v - Error_Handler();
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- if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) T0 U( `1 E, P0 w6 c$ ~$ t
- {
4 @, Y: w3 q( X7 h& x - Error_Handler();& r& i" c! p2 J
- }
9 P0 }3 Z9 J5 O& P+ {5 z - if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
+ X% ?) h4 q: v; w+ `$ r$ u$ d - {
8 s& ?! I; ~4 x/ o C( Y - Error_Handler();
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- /* USER CODE BEGIN USART1_Init 2 */
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- /* USER CODE END USART1_Init 2 */
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- void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
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- GPIO_InitTypeDef GPIO_InitStruct = {0};
" J2 m) u$ y2 d! J+ E8 v - if(uartHandle->Instance==LPUART1)9 C9 T6 W5 O6 b- K( F
- {
7 K4 ] d) q6 O! ?3 A# V& ~+ n - /* USER CODE BEGIN LPUART1_MspInit 0 */' |3 W; [5 Q% ]6 X$ t- F
: {# ?/ M- ~* y o8 J4 m. b- /* USER CODE END LPUART1_MspInit 0 */
7 Q% V" R6 x/ D7 \) A$ o - /* LPUART1 clock enable */
& @% U; a4 [7 x% m% f+ D j - __HAL_RCC_LPUART1_CLK_ENABLE();5 b; ?* K) H% b5 A
- , ^- q- G% y5 x. E/ {7 G6 O
- __HAL_RCC_GPIOA_CLK_ENABLE();9 p. F" H3 G N: F; q; r
- /**LPUART1 GPIO Configuration* l& C: q* C! v: u
- PA2 ------> LPUART1_TX9 Y( ^- R, J7 P/ F
- PA3 ------> LPUART1_RX
4 A7 O- R4 W7 F V - */
: {# J0 k! V/ k4 G3 Z6 h5 Y6 _ - GPIO_InitStruct.Pin = LPUART1_TX_Pin|LPUART1_RX_Pin;+ |& x5 c5 J5 }; H# Y" v. ^
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; t0 }% }, U! c9 V. ~ T% c0 J
- GPIO_InitStruct.Pull = GPIO_NOPULL;
, h3 C1 e) e ]& }( `. X! d - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
0 m* I1 c. [2 [" h6 i) h1 G) e1 U' \ - GPIO_InitStruct.Alternate = GPIO_AF12_LPUART1;
" J& x. ?1 x$ ^ - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
# l+ a" X9 L: y7 G+ K+ K - " ]% V2 N: q4 z3 L, Q, \, K# h
- /* USER CODE BEGIN LPUART1_MspInit 1 *// z) [& J$ Q8 r4 D% @6 t
- * w& E! Z O( g
- /* USER CODE END LPUART1_MspInit 1 */
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, X# t T! [& }- R+ a+ t+ s. K - else if(uartHandle->Instance==USART1)
$ | \* {$ u1 R% H+ \! ]) u; N - {# d3 R1 g; T0 C7 k( A
- /* USER CODE BEGIN USART1_MspInit 0 */1 k" x# E) w* g+ H7 f
A) D9 o& U( W' v5 M- /* USER CODE END USART1_MspInit 0 */- c, J, ]) s! w/ s F
- /* USART1 clock enable */
8 E) b" a0 c% q; o- f - __HAL_RCC_USART1_CLK_ENABLE();/ {! o2 d4 B) N, N6 _' ~
- 0 n: j+ b6 Z9 T2 m
- __HAL_RCC_GPIOC_CLK_ENABLE();
1 k0 v, f$ G& `, x - /**USART1 GPIO Configuration9 d7 t9 m% ^" m- E3 t4 [1 X
- PC4 ------> USART1_TX2 h5 j+ {4 @ K
- PC5 ------> USART1_RX
! }+ C7 ~6 Y8 \' J9 K3 ? - */
+ o6 S6 `( e! Q5 N - GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
' x: G5 v" Y. a: F# f - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
& c; U: g2 s% b @+ H - GPIO_InitStruct.Pull = GPIO_NOPULL;- x; [: X9 Q+ H+ V/ t
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;8 L. T/ |( o7 i' X5 E' j) t$ R
- GPIO_InitStruct.Alternate = GPIO_AF7_USART1;- {0 @7 V# Z( H
- HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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- /* USER CODE BEGIN USART1_MspInit 1 */" o: Z8 B, T H/ J) Y
; o; c1 l8 j# W7 F% U- /* USER CODE END USART1_MspInit 1 */
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- }5 K6 u. Z0 x6 ?4 a z
- 0 l( G ]) e9 T
- void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
( w o& C' K# y - {
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- if(uartHandle->Instance==LPUART1) h, V) e9 |- u- U- m! D
- {, s" {0 b' x& b9 G
- /* USER CODE BEGIN LPUART1_MspDeInit 0 */
* [, B& {& L% e3 [) p2 E' j
" M1 _1 X a- l+ q1 t- /* USER CODE END LPUART1_MspDeInit 0 */2 L1 |9 h, n6 H3 e
- /* Peripheral clock disable */ x0 ~6 P! R5 X
- __HAL_RCC_LPUART1_CLK_DISABLE();
3 D+ Q" ~$ q+ N9 K* d& P/ x$ k - / O3 P) ]! a: ?1 k) j/ @6 Z
- /**LPUART1 GPIO Configuration
+ q. b) e8 L8 }2 U8 a9 D( t - PA2 ------> LPUART1_TX9 e+ W( [/ N" S* Y1 k7 s
- PA3 ------> LPUART1_RX) f. v: m* r8 T3 T* m+ m" P+ [
- */2 l' _) q8 x& n: K% V5 |
- HAL_GPIO_DeInit(GPIOA, LPUART1_TX_Pin|LPUART1_RX_Pin);
- _5 `( ?7 z$ e) y6 E
; D e' P6 z" f4 Y0 x: p2 K! F- /* USER CODE BEGIN LPUART1_MspDeInit 1 */ {7 u8 \9 p7 s7 C- @0 d
- : V5 O. B. a) Y) X3 b
- /* USER CODE END LPUART1_MspDeInit 1 */
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- else if(uartHandle->Instance==USART1)' M: @7 y1 c9 u0 L6 o- G* J
- {
' ^4 `8 ?6 G# }8 |! x: V1 k - /* USER CODE BEGIN USART1_MspDeInit 0 */
7 I! j% A5 q" L3 u$ e - * C* B. [& d2 F$ ]
- /* USER CODE END USART1_MspDeInit 0 */
& q' U+ H' A; A6 p - /* Peripheral clock disable */
! u2 c) [5 l" M& `/ D% j$ T - __HAL_RCC_USART1_CLK_DISABLE();+ K( V0 u; J/ ^$ }, E- M4 N
- ' r+ W7 p1 z5 v6 C
- /**USART1 GPIO Configuration- m) [9 W6 M( S5 `
- PC4 ------> USART1_TX; b5 ~- F4 V, H. b& m* |& m, b9 e- p: L
- PC5 ------> USART1_RX& A$ e: s% x6 p4 i' p1 `2 L: @; t
- */% H+ |+ m& ?# S+ @3 N
- HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4|GPIO_PIN_5);
: }. K. |$ N4 z2 G# T) D7 W
- V* [9 N! i; Y* V* W9 l+ R- /* USER CODE BEGIN USART1_MspDeInit 1 */7 u/ \$ j% D" t0 Y( G$ T
- 8 V* r/ ]9 H2 f2 s! G, v" i1 ?( `. f
- /* USER CODE END USART1_MspDeInit 1 */
- ^( Q+ I3 [" c4 O h) L. B E ^) t - }
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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:
8 m2 e0 g6 ]2 s; {
/ Z( Q( E5 b" f% E- /**% e! W1 l; Q5 b0 z& T2 }
- * @brief Retargets the C library printf function to the USART.
H2 r0 U/ b$ T$ r2 }1 o% P5 d - * @param None) B- b$ f6 _: v
- * @retval None
0 e7 ~3 R- P1 o6 ]. G' Y' A - */% l& I9 \0 B9 h# J Z! M9 ]! \- @
- 3 w# t) f( x, P6 f) { \8 B
- #ifdef __GNUC__; V# J$ j2 \& G
- /* With GCC, small printf (option LD Linker->Libraries->Small printf
5 C7 Y# ?+ {7 j$ s4 c- q& D - set to 'Yes') calls __io_putchar() */
/ j8 M+ c, G5 L* G - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
) i. |+ Q! `- B- T g6 O8 p - #else- }6 R1 H8 g }$ Y
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)( M) [- {1 j' C4 t" X
- #endif /* __GNUC__ */0 v; z2 T g2 w6 C. L& |( J6 `. I
- 5 W/ Q% z) o# k) i) c% W0 y
- PUTCHAR_PROTOTYPE4 U9 ^) D2 B3 I6 e5 |
- {
& W, D0 S/ G: `- S - /* Place your implementation of fputc here */
2 W: I0 l7 q5 s7 i7 p- o( ~ - /* e.g. write a character to the USART1 and Loop until the end of transmission */+ V( a) [4 f( o5 ^2 N' e: T" I
- HAL_UART_Transmit(&hlpuart1, (uint8_t *)&ch, 1, 0xFFFF);
8 y/ v1 l. B! G$ ^. |$ {& |+ r9 c7 v8 f - return ch;# L; Z# `1 d2 L0 l
- }
; F- \2 x9 f2 A
复制代码 整个工程编译下来占用空间大小:
0 Q4 e& n* _/ t( v* f# }" W' z" }==============================================================================6 _1 | J/ T! O# g1 D7 b1 p5 m
! W( C* ]0 q U! b; l" _
0 E/ C$ R7 \: `9 ^ g& U Code (inc. data) RO Data RW Data ZI Data Debug
7 O& ?3 |+ x& {2 R( \6 a! ~3 ~5 M( g2 I7 d& {1 G
8204 434 568 20 1316 691029 Grand Totals
* k! W) u3 g1 P+ K$ k 8204 434 568 20 1316 691029 ELF Image Totals: ]8 `" L# J9 V! y! h3 |+ a; Y
8204 434 568 20 0 0 ROM Totals
4 N6 B' N* c3 e( W
. J+ e5 b* H: X==============================================================================; n% x' S* S) W. w6 o
. G% D0 H: O. [2 _/ o
Total RO Size (Code + RO Data) 8772 ( 8.57kB)
! d- k) Z0 X' J4 }5 m Total RW Size (RW Data + ZI Data) 1336 ( 1.30kB)
+ Z; e) ?/ D J. o; ? Total ROM Size (Code + RO Data + RW Data) 8792 ( 8.59kB)
7 q, ?( t0 g' R- v- A9 f7 K+ O- I; }% j A7 ?9 u; A
==============================================================================9 {0 C6 _0 }& G; ~$ P; K8 s& _% z6 A
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最后,看看效果如何:0 ~7 W7 y; ]5 [- g
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非常完美!
& h/ z$ O- z Y$ ~" v整个工程代码见附件:( L; q/ d$ |$ I* g- |& M
STM32CubeIDE.zip
(1.4 MB, 下载次数: 2)
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