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!
, V/ o6 b1 }6 _ V( b7 h
( M* Z& ]: G+ _, d; y% B/ s 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。$ E8 x* S9 s) X" |5 { G5 S8 Q" G
* ~, |: W$ y" _) r# d5 w/ z那么我们在使用的时候,main函数中调用A函数初始化即可。
/ c4 m5 A% t" K5 `1 ?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。( u: o$ Q$ h' ^1 t: B5 f) e
这就是三个长得像的家伙的关系。1 }& M& D+ |/ d7 Y
CubeMX有个特点,函数前都不会有啥注释的。哈哈。: ^2 I' K" r2 W4 S( w7 x$ G
下面就是初始化代码了,这个是CubeMx自动产生的:
2 @" g* J2 q0 |6 ?1 d& B7 W Q1 p8 Y1 L8 e3 ?. I
- #include "usart.h"/ V9 S! R; Y/ ?+ I
7 q! O9 G/ D3 h6 ~" B$ d- /* USER CODE BEGIN 0 */" `/ x: B( ^! [2 p8 U$ K% k
- $ d# F9 I) T1 c
- /* USER CODE END 0 */
& `' b* q/ H4 _6 V& K I* L" h - 1 k& _! x3 n1 E2 Y2 P0 }$ B* M7 Z; Z
- UART_HandleTypeDef hlpuart1;; b3 o- `5 @/ R7 ^
- UART_HandleTypeDef huart1;; i. ^1 Q& X# g5 f7 q2 h7 I9 a
1 |% K4 B, R: D: ~& k1 h$ u- /* LPUART1 init function */# a+ `. u# g4 M* j4 {
& M7 y! i1 B" l' T- void MX_LPUART1_UART_Init(void)1 j* Y, X) ]) ~# ?' Z4 ]' A
- {% ]+ ^+ z+ `- v7 F3 y
; M+ J; ?2 S4 S+ P2 z! s; x# a- /* USER CODE BEGIN LPUART1_Init 0 */
1 Y) K. |. T8 d( L8 b - 6 }, Q! A# b( w! L Q) _9 @
- /* USER CODE END LPUART1_Init 0 */
5 v' b& e! K; p: |5 v1 w - : l3 O! p2 m* T& c, N# }5 b
- /* USER CODE BEGIN LPUART1_Init 1 *// p( Z; {- {9 [# I# y& G/ d& a
- 4 v' X9 x0 B8 n0 \7 r0 O
- /* USER CODE END LPUART1_Init 1 */7 G/ O0 S1 @% T8 \* t
- hlpuart1.Instance = LPUART1;3 F8 S% Z3 @2 r& d; W' b8 P
- hlpuart1.Init.BaudRate = 115200;
! M- M( d, h$ c0 G9 h/ w; a* p - hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
8 x% U: K: n. c2 J3 Q" E - hlpuart1.Init.StopBits = UART_STOPBITS_1;
7 N6 `2 w8 ?$ b* d, _! O - hlpuart1.Init.Parity = UART_PARITY_NONE;- o$ O6 [4 A% {3 V$ C
- hlpuart1.Init.Mode = UART_MODE_TX_RX;+ P2 ~+ a+ ]3 e7 I2 b/ k) F
- hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;6 I# A/ b: B2 b/ t) t4 p
- hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
% N( p) s2 o: q5 X7 ^$ { - hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;+ s' N4 S. q+ n
- hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;8 u- U# `+ N3 U; X, Z. ]
- if (HAL_UART_Init(&hlpuart1) != HAL_OK)! ]; w# `3 r( t
- {3 Q4 p& {; d$ E( x( @, w
- Error_Handler();4 F6 r8 C$ o5 W! L% t
- }
( A8 v% y! \" T7 M. ]* G% O - if (HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
+ ^! E6 o6 S4 d% W - {: q% \# A; c. A( Z5 r6 X/ U
- Error_Handler();
' x$ Q( ^5 }! |; y, V- l - }
! r1 a3 Z, r: ]& T I, r2 N - if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)7 n, P U+ i) f7 J& L; X
- {2 k0 p5 }% C& ?1 r
- Error_Handler();- ^# D3 T' o+ j3 B
- }
* c2 Y" O+ t4 K. d/ w5 T8 h9 t9 z) ]. i - if (HAL_UARTEx_DisableFifoMode(&hlpuart1) != HAL_OK)
6 Q( H# \8 O+ T! x# K, ]5 g* }2 K - {
& g4 _2 A) v7 h# O# ] - Error_Handler();
4 }8 R2 C" a% E4 |) T - }
# v# \6 v9 y0 h+ L; W& R4 | - /* USER CODE BEGIN LPUART1_Init 2 */* C9 m6 f' W$ q* ^4 t6 m% e1 R
/ `6 o* w& {8 V. T. M- /* USER CODE END LPUART1_Init 2 */
" {: |; W2 ]1 m& k D
3 z+ K0 ?# v6 i6 X) o- q- }4 y+ z& |# D2 J. s' q, M
- /* USART1 init function */
5 Q% o( Z. F" [3 U7 }
. a* @1 Q9 ?8 ?0 b, [8 Q( D, m- void MX_USART1_UART_Init(void)
- `$ j+ p. `9 m6 y; R - {# a# f1 K8 w8 Z$ e
- c7 O9 M' e. n- /* USER CODE BEGIN USART1_Init 0 */
* |/ j7 B& {' J' M f
9 ?2 v$ T. t" M5 y! f; O* P/ I( j# D! ?- /* USER CODE END USART1_Init 0 */
% y r3 o+ O/ ]6 Y4 }# G - ; @( h* l) t: x" q
- /* USER CODE BEGIN USART1_Init 1 */1 h8 F+ L5 T: m r" z0 a1 n
1 ^9 A7 c$ M5 z: Y. O. w3 y( s! o- /* USER CODE END USART1_Init 1 */6 i# C2 q5 `' a$ Q" W/ _% D! B& M: @ k
- huart1.Instance = USART1;' r$ x8 f& b$ d* W( a' z
- huart1.Init.BaudRate = 115200;
8 m2 ~5 Y- b; F% B$ p$ D, G/ l - huart1.Init.WordLength = UART_WORDLENGTH_9B;
- V4 E- n" y' W: j, j8 f6 w' E - huart1.Init.StopBits = UART_STOPBITS_1;: h h* B; ]! a* D) E
- huart1.Init.Parity = UART_PARITY_NONE;
9 d9 }' b* Y6 {/ Y( f- V - huart1.Init.Mode = UART_MODE_TX_RX;
8 M" ?) _$ \( y4 c' I - huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; h2 y% ?" V9 r
- huart1.Init.OverSampling = UART_OVERSAMPLING_16;2 P( j- @. P( c1 @0 d
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
! a w. y, Z( T$ V - huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
% V6 z3 z/ Z1 T1 k8 x+ F - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;5 z0 t" @, l/ h' E; [
- if (HAL_UART_Init(&huart1) != HAL_OK)
. e. f- m$ a& H2 P4 _ - {
( y# v" \& x) I - Error_Handler();
. ^) [6 {4 P1 Y$ @4 q9 O - }- Z# R1 B9 s/ ]/ S
- if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
% M& D. M( k( E, C0 c: M4 P1 @" a - {
' I; l- b) E: O: E$ A+ v9 _# j* a5 X - Error_Handler();2 n4 f, f7 ^% q) B; ? {
- }" \" c( x% ~7 h2 N
- if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
; q; X6 |$ u; D, o - {% r% |. k3 P7 I8 \1 x Q
- Error_Handler();
2 Q+ |+ l, B7 n* y; y - }
0 T4 w5 `) L# G8 I3 q: B& w0 F - if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)7 B' V9 f1 O7 p) {7 ~% [' t
- {
7 Q8 e* ], d0 M - Error_Handler();6 P! D; v3 S5 M0 k* |# c, F
- }" q1 ^: | w' S; |) a' m: k
- /* USER CODE BEGIN USART1_Init 2 */
: ^/ l% Y1 C3 q8 P% b' x% w
$ p1 }9 `1 z! }0 ]. q, [- /* USER CODE END USART1_Init 2 */
: m+ V- d# x& k9 b8 |4 V% Q7 B
7 X0 a% Z1 W0 X1 e: Z- }0 j7 h9 I$ d ]! k3 P
- & f, Q: {3 e, \6 h' h
- void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle) p/ `9 g& W9 @4 F. y8 \( e
- {
- O, a0 M1 U5 @- k
3 U5 Q7 c) V/ J# {, p, Y9 D6 L' j- GPIO_InitTypeDef GPIO_InitStruct = {0};" o. e: F! ~* n ^+ n5 I# c9 A
- if(uartHandle->Instance==LPUART1)! r/ [# \9 C: L* g6 I0 ^
- {
/ |% @! G5 u8 g+ o6 g R: m - /* USER CODE BEGIN LPUART1_MspInit 0 */
% E- j. U0 {: z( N1 I- N
) m8 R Z* {, r3 M2 U4 {- /* USER CODE END LPUART1_MspInit 0 */
6 u: X7 b% Y! g4 _' }+ d- Q - /* LPUART1 clock enable */
, `6 q8 W3 t2 B9 |# b - __HAL_RCC_LPUART1_CLK_ENABLE();4 f, K% z" X2 q# f
) m. B, B6 V, O. ]- __HAL_RCC_GPIOA_CLK_ENABLE();
- z) M( T. u0 s& j4 o; C. M - /**LPUART1 GPIO Configuration7 k" R& w9 U0 H4 p0 k& M
- PA2 ------> LPUART1_TX
4 [: z5 @% \6 @' V+ i- G/ e' x - PA3 ------> LPUART1_RX8 f' \$ ~$ u& M# h8 {/ n; u
- *// W9 M2 a+ K( e! `
- GPIO_InitStruct.Pin = LPUART1_TX_Pin|LPUART1_RX_Pin;+ p+ C" k5 G7 D: i, Y* q- C
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;' F# b: Q J7 E) @
- GPIO_InitStruct.Pull = GPIO_NOPULL;
6 |! @& T& v# A - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;& s# P. d5 Q. k
- GPIO_InitStruct.Alternate = GPIO_AF12_LPUART1;
8 l+ P5 g5 }* z( c# M% f - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);3 V+ b' C6 z, h) m
% v5 J( `- J% L- /* USER CODE BEGIN LPUART1_MspInit 1 */
, d, y- R& J2 s$ b: m: o6 Q8 J
% H! r+ v* W/ g; }! Q- /* USER CODE END LPUART1_MspInit 1 */
2 u# u; ?- \" a/ q4 e O+ A# s9 {. n - }$ t j! ~4 `. K6 e K
- else if(uartHandle->Instance==USART1)
& O. q# F# m/ x% Q# W1 j m - {9 [7 Q4 v) K5 A
- /* USER CODE BEGIN USART1_MspInit 0 */0 a7 f3 v( C' i" {2 B
+ D( y" c9 |4 N: e' I- /* USER CODE END USART1_MspInit 0 */
) |5 c) b _, r" u5 m+ F6 b - /* USART1 clock enable */! f5 M# j! @8 j" |. I/ v
- __HAL_RCC_USART1_CLK_ENABLE();7 }: p8 z8 H9 p6 s! T
, j# u. P" \ y- __HAL_RCC_GPIOC_CLK_ENABLE();
: x }4 D n L2 x; d" d" G& d, s - /**USART1 GPIO Configuration
9 O# |* t* J0 u" N8 W, B - PC4 ------> USART1_TX& D! O5 v8 n& m
- PC5 ------> USART1_RX6 K& d1 Y V% q8 W- ^
- */
; k. j6 Y" k; I3 X7 \ - GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;5 E2 l; z }1 @4 R9 m7 o. z
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
- r8 L; P0 @' ~ g7 R& f% h - GPIO_InitStruct.Pull = GPIO_NOPULL;
! s3 b+ i5 D1 B0 I* R - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;% g2 N$ |& o d' s! L7 f2 {
- GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
# v9 z( c" l# ]1 _1 N, @3 M - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
4 p) c" t/ y' ]- E& a; l3 ?
& E+ r9 ]' A8 R- /* USER CODE BEGIN USART1_MspInit 1 */3 X5 E* g: A- O* `7 V
- 4 W3 [( Y+ W5 J& b+ p- l2 u- e6 ?
- /* USER CODE END USART1_MspInit 1 */% ?6 u) i# Z n5 e* ?$ s7 O
- }7 U( C# h% c; L. t( w
- }
' S# e. c1 W N( R0 J; s
9 v; N$ z5 G% @) k- void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)& y P! G! i4 z
- {
5 P/ p7 U+ e5 [1 a. K9 ]) F! H0 A - 5 f: o( c6 b; ?
- if(uartHandle->Instance==LPUART1)
5 b, S' J d% c7 V - {1 C( q, E K/ }3 d9 @
- /* USER CODE BEGIN LPUART1_MspDeInit 0 */
' {0 _! t" D6 L
: e9 `$ `( b+ |- j4 n( r- /* USER CODE END LPUART1_MspDeInit 0 */
r5 i% O; v8 U) y( d3 w - /* Peripheral clock disable */
' u: E9 _/ R x& Z7 x- g - __HAL_RCC_LPUART1_CLK_DISABLE();5 r. L$ \/ ~- ]( q: G7 R" L3 g }
2 u( r2 `0 [$ r/ Q" s J- /**LPUART1 GPIO Configuration
+ h) Q5 K7 o6 m7 Y5 J) R$ H3 Q - PA2 ------> LPUART1_TX
. n7 _9 m3 t- A3 ~' x, z - PA3 ------> LPUART1_RX
1 F [: X! j0 ]5 J1 k+ r$ K - */6 F* C/ U o4 b6 ?/ `3 }9 M
- HAL_GPIO_DeInit(GPIOA, LPUART1_TX_Pin|LPUART1_RX_Pin);: M+ y* o/ v% }; P6 D Y0 y
% B4 Z+ T$ B* Q4 ~- /* USER CODE BEGIN LPUART1_MspDeInit 1 */6 R* p$ t; E+ }
, s( {3 ~! @/ Q4 D8 y- /* USER CODE END LPUART1_MspDeInit 1 */1 R+ b' M" O: N3 x- ~
- }+ Q F) q2 E$ s% A
- else if(uartHandle->Instance==USART1)2 m9 b& Y/ ]( C# j/ k( v; D8 ^
- {) b1 ~% k, J2 _1 G9 ^! V
- /* USER CODE BEGIN USART1_MspDeInit 0 */2 e% r) {& A6 ~* Z: ^8 h/ ?0 `5 a
. |) E' x9 q- C# k0 H0 z- /* USER CODE END USART1_MspDeInit 0 */
\- I! I1 p I5 U3 E$ `; X - /* Peripheral clock disable */
4 R# H+ P7 s O" D1 Y) t - __HAL_RCC_USART1_CLK_DISABLE();
. A9 T& Z4 l6 R( J7 H# E6 q6 d0 }
" t7 ~8 z# k& E2 T- /**USART1 GPIO Configuration4 G, a8 b0 K4 ~: y. p1 b
- PC4 ------> USART1_TX
4 G( a8 b3 \- w8 Y - PC5 ------> USART1_RX
1 y9 z, {; B! ` - */4 s/ u( `) Y' B8 E
- HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4|GPIO_PIN_5);
" t0 m* A$ L7 F" s% A, C
' ?% U1 |/ Y3 U+ v5 Q( s- /* USER CODE BEGIN USART1_MspDeInit 1 */! Q) o0 h( E' F3 ]6 t. O
- 1 Z; y0 z' k7 G' c" i
- /* USER CODE END USART1_MspDeInit 1 */
' C( Q" n1 f# R0 s+ c - }
* M8 P% y" x# u: o - }) H/ i9 Z: k; L% W$ @% s
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:7 N. g0 e4 q0 U' m
- 7 p. u5 p: P( `5 w% f) x
- /*** x6 v# I* t: E7 L7 D! o% P6 `
- * @brief Retargets the C library printf function to the USART.
% ?. N9 ]0 i- [, C* i4 k - * @param None2 m, W ~, {3 Z+ ~
- * @retval None
8 ]/ }. j4 U& D - */3 e' Y2 P! q4 Y
- " S/ C9 U4 n$ b q3 z }
- #ifdef __GNUC__
0 F9 }' B/ q# t! r' g - /* With GCC, small printf (option LD Linker->Libraries->Small printf
* y, A% G( w2 f& M - set to 'Yes') calls __io_putchar() */; ^, m- ?! e+ t3 _% R
- #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
3 J( K1 u# v+ [- K- w - #else
q0 Q* g. B. r& l+ } - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
# V" b, Z' h; D1 y5 B1 y' p - #endif /* __GNUC__ */% O0 I0 J: x* n/ A1 x! s7 p
# n8 q4 C* v" [, g- PUTCHAR_PROTOTYPE
5 h! |5 t7 t( U6 A# L) A; H - {
! W/ Z5 T: b" ?1 Q - /* Place your implementation of fputc here */
7 f, I3 `1 j$ I Q) B - /* e.g. write a character to the USART1 and Loop until the end of transmission */+ F/ a8 M! ~/ Q( Z8 j; A/ P0 a; _4 y4 [
- HAL_UART_Transmit(&hlpuart1, (uint8_t *)&ch, 1, 0xFFFF);
) y5 d4 v4 q( q# [" ^, k. D - return ch;
. A( i) Y# P4 |% y! t - }
4 x7 ?/ C6 j; F) w( d8 |- s- m
复制代码 整个工程编译下来占用空间大小:7 m) y* c4 T4 J8 y, ~. ]
==============================================================================0 |) H5 z7 O* [; V
" K: M+ g. m ~4 X
+ y5 [' u2 `# B2 z Code (inc. data) RO Data RW Data ZI Data Debug " P, s& A" Z' P
. G1 \# B2 F: t$ g0 j+ i
8204 434 568 20 1316 691029 Grand Totals
" X% |: k( R: N+ t, p 8204 434 568 20 1316 691029 ELF Image Totals" e3 r* n/ @" F
8204 434 568 20 0 0 ROM Totals, r' p$ c. Z+ `9 o1 R4 W' S& J
& H) }% u: b# r* L& J
==============================================================================
9 L+ N' \* k6 C0 b4 F
* n! S8 `& z' @, c& u# p Total RO Size (Code + RO Data) 8772 ( 8.57kB)& c3 r7 a$ Q: T9 R
Total RW Size (RW Data + ZI Data) 1336 ( 1.30kB)
" E* k- u2 A4 P0 D Total ROM Size (Code + RO Data + RW Data) 8792 ( 8.59kB)
1 }( n3 S6 Q& g9 i& C% _
2 A9 {+ n2 q0 \! z8 ?' _: X==============================================================================
Y* E- P% u8 K0 ~- k% x6 ?8 l# b/ k- {( N6 I
: l/ L" r) {2 } U
, k9 r' h2 A6 o4 Y4 r4 r
最后,看看效果如何:5 W: d/ ]4 ]3 B4 }' j
8 v0 ^& e- T$ g5 ]7 X6 y. s非常完美!, P a. [ w8 y
整个工程代码见附件:, v5 k0 U6 Y! J/ b: R1 I
STM32CubeIDE.zip
(1.4 MB, 下载次数: 4)
|