STM32L4用按键点亮一个灯

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STM32L4用按键点亮一个灯 [复制链接]

1. #include "stm32l4xx_hal.h"
   
2. void SystemClock_Config(void);
   
3. int main()
   
4. {
   
5.         GPIO_InitTypeDef  GPIO_InitStruct;
   
6.         HAL_Init();
   
7.         SystemClock_Config();
   
8.          __HAL_RCC_GPIOA_CLK_ENABLE();
   
9.          __HAL_RCC_GPIOC_CLK_ENABLE();
   
10. 
    
11.         GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
    
12.   GPIO_InitStruct.Pull  = GPIO_PULLUP;
    
13.   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    
14.   GPIO_InitStruct.Pin = GPIO_PIN_5 ;
    
15.   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    
16.        
    
17.         GPIO_InitStruct.Mode = GPIO_MODE_INPUT ;
    
18.   GPIO_InitStruct.Pull = GPIO_NOPULL;
    
19.   GPIO_InitStruct.Pin = GPIO_PIN_13;
    
20.         HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
    
21.         while(1)
    
22.         {
    
23.                 if(HAL_GPIO_ReadPin(GPIOC,GPIO_PIN_13))
    
24.                 {
    
25.                         HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET);
    
26.                   
    
27.                 }
    
28.                 else
    
29.                         HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET);
    
30.        
    
31.         }
    
32. }
    
33. void SystemClock_Config(void)
    
34. {
    
35.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    
36.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    
37. 
    
38.   /* MSI is enabled after System reset, activate PLL with MSI as source */
    
39.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
    
40.   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
    
41.   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
    
42.   RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
    
43.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    
44.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
    
45.   RCC_OscInitStruct.PLL.PLLM = 1;
    
46.   RCC_OscInitStruct.PLL.PLLN = 40;
    
47.   RCC_OscInitStruct.PLL.PLLR = 2;
    
48.   RCC_OscInitStruct.PLL.PLLP = 7;
    
49.   RCC_OscInitStruct.PLL.PLLQ = 4;
    
50.   if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    
51.   {
    
52.     /* Initialization Error */
    
53.     while(1);
    
54.   }
    
55.   
    
56.   /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
    
57.      clocks dividers */
    
58.   RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
    
59.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    
60.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    
61.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;  
    
62.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;  
    
63.   if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
    
64.   {
    
65.     /* Initialization Error */
    
66.     while(1);
    
67.   }
    
68. }
    

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xutong

https://bbs.eeworld.com.cn/thread-558354-1-1.html  先从昨日的帖子开始

眼大5子

else 后面的语句最好也用{}包起来，养成良好的习惯

xutong

眼大5子 发表于 2017-9-8 09:41
else 后面的语句最好也用{}包起来，养成良好的习惯

ok

xutong

keil注释复制出来是乱码的解决方法