说实话，我不喜欢hall库，也许很多人用起来很顺手，但是我用起来不习惯，而且LL库效率明显高得多，也许是没有接触过上层代码的原因吧，那么我就来说一下LL库的环境搭建以及点灯。
        我们首先根据官方的LL库以及例程做更改，新建文件夹，拷贝文件，具体如下图。

* @: P* p6 K! ?4 s& W

        并将文件拷贝到个个文件夹内，方便将文件归类以及后期文件管理，具体的可以看附件里，附件内的源码。具体的可以查看keil工程下的文件，如下图

文件拷贝完成之后，然后添加文件路径和初始化定义，然后增加如下代码到Main.c文件。

: y+ n" K% ]$ q5 D: Z: f9 V7 ?

1. 
   7 l( }4 M2 s  k4 n
2. #include "stm32u5xx_ll_icache.h"
   8 Q5 d7 x$ d: e3 p7 D% }
3. #include "stm32u5xx_ll_pwr.h"
   
4. #include "stm32u5xx_ll_crs.h"
   
5. #include "stm32u5xx_ll_rcc.h"
   
6. #include "stm32u5xx_ll_bus.h"
   4 N$ O; R# u0 k- Q& @9 L
7. #include "stm32u5xx_ll_system.h"
   + [  M6 L5 A- |: I2 V# ~% Y' L
8. #include "stm32u5xx_ll_exti.h"
   
9. #include "stm32u5xx_ll_cortex.h"
   
10. #include "stm32u5xx_ll_utils.h"
    
11. #include "stm32u5xx_ll_dma.h"
    2 k9 E& S+ ?% R! L" o7 w% H% t
12. #include "stm32u5xx_ll_gpio.h"
    
13. #include "stm32u5xx_ll_lpgpio.h"
    
14. 
    ! ?% t: a4 a* ~6 h) F8 ~
15. 
      {; V9 t0 Q/ V( o
16. 
    8 e$ j3 G4 Z) F; j3 a9 D: H
17. 
    + B" r& q$ h0 T& x( l' ?: U
18. #define LED1_Pin LL_GPIO_PIN_7
    
19. #define LED1_GPIO_Port GPIOC
    
20. 
    
21. 
    
22. 
    ; C- e( F' }: S4 [4 ^0 j
23. /**
    + R4 X' L5 P1 Q5 }' N: o# @4 Z
24.   * @brief Power Configuration
    
25.   * @retval None
    
26.   */
    1 c% R% x4 B' ~) }( R& U
27. static void SystemPower_Config(void)
    
28. {
    
29. 
    ( ?5 t0 V/ a3 M: h
30.   /*
    6 R8 b; Y9 j# b! d: k" g$ [
31.    * Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral
    
32.    */
    
33.   LL_PWR_DisableUCPDDeadBattery();
    1 r; g/ L' w: f- k
34. 
    
35.   /*
    
36.    * Switch to SMPS regulator instead of LDO
    ; n7 u) F( M5 I; s& c8 j3 a
37.    */
    " w2 C& B9 F( @" j
38.   LL_PWR_SetRegulatorSupply(LL_PWR_SMPS_SUPPLY);
    
39. 
      H4 L; {6 I7 c) y- ?
40.   while(LL_PWR_IsActiveFlag_REGULATOR()!=1)
    
41.   {
    1 G. _& \; `$ X, }% b1 T  T2 p
42.   }
    
43. }
    
44. 
    
45. /**
    
46.   * @brief ICACHE Initialization Function
    1 Q9 C# _3 ~3 s# n6 {7 S7 t6 p  {; r# ?$ m
47.   * @param None
    3 ~( z2 L0 Y% [% e- g$ f, k7 T
48.   * @retval None
    9 M- }# }- U( F% a, c, y2 P
49.   */
    
50. static void MX_ICACHE_Init(void)
    + q1 j+ S# V  a% e$ \8 w. R
51. {
    
52. 
    * q: Y2 D. u$ `
53.   /** Enable instruction cache in 1-way (direct mapped cache)
    
54.   */
    , a' v, K# \0 R" O: y
55.   LL_ICACHE_SetMode(LL_ICACHE_1WAY);
    
56.   LL_ICACHE_Enable();
    
57.   /* USER CODE BEGIN ICACHE_Init 2 */
    . w2 p! b% J) m. j
58. 
    
59.   /* USER CODE END ICACHE_Init 2 */
    
60. 
    " m0 S8 N2 _2 L) r. b* C8 r
61. }
      A- \' i- w1 e  G& {6 x
62. 
    # h$ z, M8 f1 J& D  I3 h9 r! Z
63. 
    
64. void SystemClock_Config(void)
    
65. {
    $ W: G; I2 J% g7 l) k1 o/ w# ?
66.   LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);
    . Q+ S' \/ X/ V6 `6 i! w
67.   while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_4)
    
68.   {
    ) f: z3 u, G: x
69.   }
    - o4 ?. f! N7 Z% j
70. 
    
71.   LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
    
72.   LL_RCC_MSIS_Enable();
    $ |1 `! j" k1 A% F2 S' n3 r- B
73. 
    
74.    /* Wait till MSIS is ready */
    
75.   while(LL_RCC_MSIS_IsReady() != 1)
    
76.   {
    2 T( N' w# X* K$ F2 Z
77.   }
    8 R- U4 j0 N+ i" ^5 @
78. 
    + y2 H. l* ~' E, V* E7 M+ j
79.   LL_RCC_MSI_EnableRangeSelection();
    ' i, e8 I. f7 z! L* y
80.   LL_RCC_MSIS_SetRange(LL_RCC_MSISRANGE_4);
    
81.   LL_RCC_MSI_SetCalibTrimming(16, LL_RCC_MSI_OSCILLATOR_1);
    
82.   LL_RCC_PLL1_ConfigDomain_SYS(LL_RCC_PLL1SOURCE_MSIS, 1, 80, 2);
    # J. S9 ~  d. m( N7 b0 g$ [- S
83.   LL_RCC_PLL1_EnableDomain_SYS();
    
84.   LL_RCC_SetPll1EPodPrescaler(LL_RCC_PLL1MBOOST_DIV_1);
    
85.   LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_4_8);
    
86.   LL_RCC_PLL1_Enable();
    
87. 
    
88.    /* Wait till PLL is ready */
      n  p' M8 o% \% p
89.   while(LL_RCC_PLL1_IsReady() != 1)
    
90.   {
    
91.   }
    
92. 
    
93.    /* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */
    
94.   LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2);
    
95. 
    
96.   LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1);
    
97. 
    3 {# T/ N4 D4 ]  {1 S! w6 Z. I; _/ j5 d
98.    /* Wait till System clock is ready */
    
99.   while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL1)
    
100.   {
     
101.   }
     
102. 
     
103.   /* Insure 1µs transition state at intermediate medium speed clock based on DWT*/
     ( D8 @- r1 I( j4 @; a& K& t
104.   CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
     
105. 
     
106.   DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
     - x( B: |' a3 v" Y4 }
107.   DWT->CYCCNT = 0;
     / j! O( K) H7 B3 d) O( t: f
108.   while(DWT->CYCCNT < 100);
     
109. 
     ! h  E: o: J6 q) }: c6 U
110.   LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
     
111.   LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
     ' |  D/ m6 R. C3 m; N
112.   LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
     + ?2 _$ t$ K" ~
113.   LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_1);
     3 Q" t/ P+ k# J
114. 
     
115.   LL_Init1msTick(160000000);
     3 I1 S  j) @" y$ G
116. 
     
117.   LL_SetSystemCoreClock(160000000);
     
118. }
     
119. 
     
120. /**
     1 e/ v/ M# `* f1 q2 K
121.   * @brief GPIO Initialization Function
     " L8 r% C1 e6 m6 B% ^
122.   * @param None
     % F0 d* C  y$ T7 p
123.   * @retval None
     
124.   */
     $ A+ \5 S/ _2 X, ~9 E4 t
125. static void MX_GPIO_Init(void)
     
126. {
     
127.   LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
     
128. 
     " j0 f% H- I( \( ~. _
129.   /* GPIO Ports Clock Enable */
     
130.   LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);
     + r, n5 _3 Z' \6 b- q, ~( P* |+ Y
131. 
     " h' v5 {2 q) p. U
132.   /**/
     
133.   LL_GPIO_ResetOutputPin(LED1_GPIO_Port, LED1_Pin);
     % {6 n5 y6 A5 C' g6 N- Y
134. 
     
135.   /**/
     
136.   GPIO_InitStruct.Pin = LED1_Pin;
     # s( c- J4 i% ]7 |/ W! T
137.   GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
     
138.   GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
     % {& {2 U8 C1 |4 _$ A
139.   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
     
140.   GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
     2 M1 G7 F. ~  a& M* U# H
141.   LL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);
     1 h' M! s( q6 H5 [& X/ ?
142. 
     ) v% a- {. h% P3 \! V* o* L
143. }
     + t; g; R8 i& u4 m+ H) b9 k
144. 
     , t0 R* [! l4 Z$ ]) M. M$ N
145. 
     & Y# E4 x- y$ K# m4 f4 {
146. 
     
147. int main(void)
     * a& W& \( g2 [: j/ z9 E% L0 L8 r, P
148. {
     
149.   LL_AHB3_GRP1_EnableClock(LL_AHB3_GRP1_PERIPH_PWR);
     
150.   SystemClock_Config();
     . ^5 H, b7 f: w# t# P
151.   SystemPower_Config();
     5 C' Q2 {( T4 d7 C# Q, }
152.   MX_GPIO_Init();
     
153.   MX_ICACHE_Init();
     
154.   while (1)
     1 Z3 E  z: {7 j% B1 a# c8 l
155.   {
     ; c  D5 g5 r. m) v# p# M4 R
156.                 LL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
     ! R0 L+ d1 d$ O( j- Z. L8 q/ p1 @
157.                 LL_mDelay(500);
     
158.   }
     
159.   /* USER CODE END 3 */
     * ^7 j$ _4 w6 L/ N
160. }
     
161. 
     
162. 
       Y4 |* q6 Y! W8 L, h  D, @
163. 
     ( J: C8 j. V4 O2 j
164. #ifdef  USE_FULL_ASSERT
     * i7 e$ u( a& p& F
165. /**
     
166.   * @brief  Reports the name of the source file and the source line number
     
167.   *         where the assert_param error has occurred.
     - A& S7 y8 l5 `3 c% g3 q( k: J
168.   * @param  file: pointer to the source file name
     
169.   * @param  line: assert_param error line source number
     
170.   * @retval None
     3 j0 m5 A8 N& s! ]# |  [
171.   */
     % E1 Y% _2 k6 q8 \4 d/ f
172. void assert_failed(uint8_t *file, uint32_t line)
     5 E/ h, k! z, r  [& ]7 T
173. {
     
174.   /* USER CODE BEGIN 6 */
     
175. 
     - E/ z2 x5 Q% ~) u5 H$ e
176.   /* User can add his own implementation to report the file name and line number,
     1 v9 i5 S! ]! @; m! h0 r
177.      ex: printf("Wrong parameters value: file %s on line %d", file, line) */
     
178. 
     ; t2 G8 S) a- j& s" F. n
179.   /* Infinite loop */
     - i3 P( f. Q- m& l+ D: T
180.   while (1)
     . Y+ u2 ]7 o- |0 W9 r! J9 K% V
181.   {
     
182.   }
     . }" l; F) u+ Z- M
183.   /* USER CODE END 6 */
     
184. }
     4 a& m$ H9 W. j. E) G4 p- M
185. #endif /* USE_FULL_ASSERT */
     , G& w. W) l0 m; W/ i( x

复制代码

在完成之后，编译，就可成功下载点灯，具体可查看附件。

/ Z! m1 d8 t, |* j! {4 V& h

好了，先分享到这，过年后来了的第一篇。

附件：工程源码 Demo.rar (716.81 KB, 下载次数: 1)

2023-2-2 23:27 上传

点击文件名下载附件

期待下一篇