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。& f; S$ m- r# n" G
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。
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" y" W, l: L, ^" o, M 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
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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。 - Q/ L) A: g9 W+ _% J! y2 N
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- #include "stm32u5xx_ll_icache.h"0 \+ N4 P, W6 b r4 @7 f6 [3 D
- #include "stm32u5xx_ll_pwr.h"
7 c; m; | r7 e* ` - #include "stm32u5xx_ll_crs.h"
7 n: a% @! [9 w0 h7 U/ A' R8 _! T8 k2 @ - #include "stm32u5xx_ll_rcc.h"8 B# |. [4 l3 H5 h" `
- #include "stm32u5xx_ll_bus.h"
5 S' @+ t7 V9 I: a2 e, p - #include "stm32u5xx_ll_system.h"
; i0 e' S4 o, s0 p: B. z - #include "stm32u5xx_ll_exti.h"9 }) |, x( a2 {9 Z
- #include "stm32u5xx_ll_cortex.h"% W0 K/ W% ^4 Q/ m# Y
- #include "stm32u5xx_ll_utils.h", @# W6 C* b7 i9 S2 o
- #include "stm32u5xx_ll_dma.h"
% L1 T# n6 r9 B Z! ~! O - #include "stm32u5xx_ll_gpio.h"; {# ]- H% O: n. M+ A* o, T, `/ D0 L3 ~
- #include "stm32u5xx_ll_lpgpio.h"; Q! F# Y6 W5 c$ q* A+ d
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8 c9 q$ i* |. t b: \- #define LED1_Pin LL_GPIO_PIN_7! Q2 `- j* h! K6 m/ B
- #define LED1_GPIO_Port GPIOC
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- k5 w6 R2 e5 c- /**1 m6 {" w. A3 ?* c$ ]0 O
- * @brief Power Configuration: e0 X) @ N5 c% i9 `. p
- * @retval None% _4 s% _3 f# ^9 h) N
- */
; s3 R& o. }0 X+ Y - static void SystemPower_Config(void)
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& ~$ u! I, {$ G, m' g- /*
: W: O6 v( c; n; x - * Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral# a! P5 J4 f. G! p4 N6 Y E
- */+ C& X- B/ I, `3 \2 A# L6 q" O
- LL_PWR_DisableUCPDDeadBattery();" ^+ ~4 j6 j' e! m+ t/ [. X$ S
- 8 j1 N8 Z4 Q4 @
- /*
; {! N- `+ }3 e6 V# d - * Switch to SMPS regulator instead of LDO
6 @, G9 }. O& B' M( L1 e' z - */
. s; ]1 h4 z6 j- v5 v8 p! x5 x - LL_PWR_SetRegulatorSupply(LL_PWR_SMPS_SUPPLY);
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Q5 s ~- l9 f! E) t- while(LL_PWR_IsActiveFlag_REGULATOR()!=1)
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3 S% S4 R( u3 c6 y+ ~5 v- /**
. t4 O0 {4 `1 @" g# O. `* q, R - * @brief ICACHE Initialization Function
2 C; F& v+ N+ Z3 `) l8 O - * @param None/ q$ u* ]* @' {, G) C: c
- * @retval None1 f) Z9 O7 n9 O# g4 o
- */
9 ], I1 U% r0 C - static void MX_ICACHE_Init(void)
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5 y/ F7 n$ m8 o* {( q! ?- /** Enable instruction cache in 1-way (direct mapped cache); B. T/ m4 p+ {1 I: G
- */
8 _& x; N. F! v' m+ Y' F w B, j# q - LL_ICACHE_SetMode(LL_ICACHE_1WAY);( L9 O* i) e9 ~9 T$ ?! Q
- LL_ICACHE_Enable();
5 D1 R* g, Y/ R$ t7 _ - /* USER CODE BEGIN ICACHE_Init 2 */
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- /* USER CODE END ICACHE_Init 2 */
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( j8 Q+ B& |, n2 Y0 u" s- void SystemClock_Config(void)% v; [% Z7 C8 _4 h8 P& J7 k1 r
- {
* s1 X: Q# R* s - LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);' m; E8 G1 ?. Z, m7 r; Q( ?
- while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_4)
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- LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);. j2 Z6 F' x; f8 ^+ k, q
- LL_RCC_MSIS_Enable();
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7 f5 o3 F" ?0 o1 |1 g+ T- /* Wait till MSIS is ready */' i" R, [$ A# V; D: [. L7 Q
- while(LL_RCC_MSIS_IsReady() != 1): u& ~# n6 |4 q0 I: M
- {
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2 D/ Y. m& L/ J( B- M- LL_RCC_MSI_EnableRangeSelection();
6 j) O% I0 |7 l3 e8 F - LL_RCC_MSIS_SetRange(LL_RCC_MSISRANGE_4);" d7 C N, `( [! I0 P3 c
- LL_RCC_MSI_SetCalibTrimming(16, LL_RCC_MSI_OSCILLATOR_1);; g: p. o1 H% i3 w9 A, n6 @
- LL_RCC_PLL1_ConfigDomain_SYS(LL_RCC_PLL1SOURCE_MSIS, 1, 80, 2);
2 E( }* ?9 F3 R, l( ]2 E6 n - LL_RCC_PLL1_EnableDomain_SYS();2 G2 ^ n4 s O4 v6 m ~
- LL_RCC_SetPll1EPodPrescaler(LL_RCC_PLL1MBOOST_DIV_1);
" p5 C: Y- A+ G! u$ k6 L' U - LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_4_8);" d! f0 l1 Q _, B8 [+ c" V. F
- LL_RCC_PLL1_Enable();; |5 i! v3 K. o1 M
2 T: c% |+ ]# t! a/ n# ?4 b ^- /* Wait till PLL is ready */: b, P* U; u$ ^7 L
- while(LL_RCC_PLL1_IsReady() != 1)
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- }
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- /* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */
7 j' x Y4 N! i3 ^ o+ }; x - LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2);# n/ `+ e( W# C) B5 s9 `
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- LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1);
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7 @7 @* y- H4 [ j3 _- /* Wait till System clock is ready */
n! u9 |$ C) n d( }5 R* k - while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL1)
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- }
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/ b+ O! c9 d: e9 R' q0 Q- /* Insure 1µs transition state at intermediate medium speed clock based on DWT*/
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- DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;6 ]! f% B$ q' v$ [7 b& o, ]6 \
- DWT->CYCCNT = 0;- B4 C6 C) T5 I4 |- S
- while(DWT->CYCCNT < 100);3 ]0 M( l, Z2 ^6 i* b
3 M2 I* Q9 n) L7 u7 Z- LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);8 W% Y+ Z7 B4 Z3 g% I8 f5 e
- LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);! R) a/ S& W! `" r* y; U1 q
- LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
) L( [. g; D: Z( s) _+ q4 W) s* S - LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_1);( T; L; l- s; U, h8 \8 @& ^1 C
+ ~( v& |- N( m7 v2 _) g- LL_Init1msTick(160000000);
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- LL_SetSystemCoreClock(160000000);/ \5 N- s, z2 I4 E2 e8 r
- }
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. k+ r3 }2 ?4 M& [- /**; a# J2 I! H1 u& a7 y
- * @brief GPIO Initialization Function" f' f1 m8 {0 p" i
- * @param None
$ ]$ W, _2 k, \3 n; m6 E - * @retval None2 d7 K( j; g u. D7 [* S; c+ y
- */% Y0 I P3 k: y
- static void MX_GPIO_Init(void)
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- t, T9 y( `, K% o( M, ` - LL_GPIO_InitTypeDef GPIO_InitStruct = {0};3 p3 G1 x( ^1 z6 d
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- /* GPIO Ports Clock Enable */4 }5 f; S( N5 r z- b v3 Y3 [ ]$ A
- LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);* j: N X2 I. J: B( W8 x* U
h0 K" T( O5 Z0 N+ f- /**/+ p5 b. S+ F6 X4 L) C/ u3 ~
- LL_GPIO_ResetOutputPin(LED1_GPIO_Port, LED1_Pin);! Z: w' j* v: Y% O& s& v6 U
- - b0 ~) b+ H% @1 ?- q
- /**/
' @' X: B6 A2 }! ~- r P( I - GPIO_InitStruct.Pin = LED1_Pin;
2 u. B) ?) j7 a& M2 ]! W& r! @ - GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;& W. _ S/ m6 z' b. [! g9 _
- GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
" M/ ?0 w. x9 J% B - GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;( y9 N% }1 k2 C5 s9 z5 f: s- W
- GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
6 a) C, ?7 L8 J0 {4 r - LL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);
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4 {4 |+ @- c( c2 t& T, b- int main(void)
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- LL_AHB3_GRP1_EnableClock(LL_AHB3_GRP1_PERIPH_PWR);
2 x* A0 N5 k, [- n' Y& ^( _* O - SystemClock_Config();7 F) P* v [4 j* l0 }5 ?! K
- SystemPower_Config();0 p. C) o! M K& @) _6 c' z9 B
- MX_GPIO_Init();
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[; @' v5 a6 W( v9 q9 h - while (1)
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- LL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);: G$ t( _* s: V: M* O0 ?
- LL_mDelay(500);
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4 J/ Q: ]4 l' c7 q7 G8 N' n - /* USER CODE END 3 */
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- #ifdef USE_FULL_ASSERT9 X0 D! Q) q5 R6 @4 Q
- /**
# @$ x/ l4 r" T6 K+ g R% K - * @brief Reports the name of the source file and the source line number
) k" U7 L3 V3 u2 V+ C( |& J7 U - * where the assert_param error has occurred.# c0 J6 Q9 I$ h# ]4 j
- * @param file: pointer to the source file name
- R* C9 @0 F4 e; J6 } - * @param line: assert_param error line source number
, ^ O0 {$ T4 W - * @retval None3 D8 b' ?- p6 P3 i& Q
- */+ b. z" G" M7 e7 G6 L
- void assert_failed(uint8_t *file, uint32_t line)) E% ~2 l. R. r, O! `; O& \) i
- {" [ F. L) g$ E
- /* USER CODE BEGIN 6 */* M4 P2 l f+ h2 t w# C; H u5 Z6 e) Z
6 d5 p( U4 i, z& r* F- /* User can add his own implementation to report the file name and line number,1 k0 n3 l- L* u$ l1 I6 y6 t7 x
- ex: printf("Wrong parameters value: file %s on line %d", file, line) */" a( _, C. M2 T
, O6 P+ h t: [$ c( l' T- /* Infinite loop */- a& U4 e9 d; b6 ?3 ~: {- p
- while (1)
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- }
7 k) z1 e- V; c& q) d" g - /* USER CODE END 6 */
# G/ ]+ u( v! A - }
, p, H2 B) `# T% o1 } - #endif /* USE_FULL_ASSERT */5 W n. H" A+ V4 y
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。 # m2 I. d2 \" b3 ^6 _. k
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好了,先分享到这,过年后来了的第一篇。
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期待下一篇