蓝桥杯嵌入式第12届真题(完成) STM32G431_蓝桥杯嵌入式真题

蓝桥杯嵌入式第12届真题(完成) STM32G431

题目

程序

main.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "led.h"
#include "key.h"
#include "usart1.h"
#include "stdio.h"
#include "string.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
uint8_t view = 1;
uint8_t carnums = 8;
uint8_t CNBRnums = 2;
uint8_t VNBRnums = 4;
uint8_t IDLEnums = 2;
float CNBRprice = 3.50f;
float VNBRprice = 2.00f;
uint8_t lcdtext[20];
extern struct Key key[4];
uint8_t pwm = 0;
extern uint8_t rxflag;
extern uint8_t rxdata[1];
extern uint8_t rxindex;
extern uint8_t rxbuffer[22];
uint8_t cartype[4];
uint8_t carnum[4];
uint8_t cartime[12];
uint8_t printtext[30];
struct Times
{
  int year;
	int month;
	int day;
	int hour;
	int min;
};
struct Cars // 串口接收
{
	char carKind[5]; //车型
	char carNum[5];  //车牌号
	char carTime[12]; //进入时间
	struct Times Time;
};

struct Cars car;
struct Cars park[8]={0,0,0,0,0,0,0,0}; 
float stopprice;
uint8_t led,led1enable,led2enable;
int monthDays[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
uint8_t isError = 0;
/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void key_process(void);
void usart1_process(void);
void lcd_process(void);
void led_process(void);
void outpark(uint8_t car_num);
void inpark(void);
void isErrorProcess(void);
void lcdclear(void);
int isLeapYear(int year);
long dateToTotalMinutes(struct Times t);
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_TIM17_Init();
  MX_USART1_UART_Init();
	HAL_TIM_Base_Start_IT(&htim2);
	HAL_UART_Receive_IT(&huart1,rxdata,1);
  /* USER CODE BEGIN 2 */

    LCD_Init();
		lcdclear();
		led_Display(0x00);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */



   

    while (1)
    {
				key_process();
				usart1_process();
				lcd_process();
				led_process();
			isErrorProcess();
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV2;
  RCC_OscInitStruct.PLL.PLLN = 20;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the peripherals clocks
  */
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
  PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
void key_process(void)
{
	if(key[0].key_single_flag)
	{
		key[0].key_single_flag = 0;
		if(view==1)
		{
			view = 2;
		}else{
			view = 1;
		}
		
	}
	if(key[1].key_single_flag)
	{
		key[1].key_single_flag = 0;
		if(view==2)
		{
			CNBRprice+=0.5f;
			VNBRprice+=0.5f;
			
		}
	}
	if(key[2].key_single_flag)
	{
		key[2].key_single_flag = 0;
		if(view==2)
		{
			CNBRprice-=0.5f;
			VNBRprice-=0.5f;
			
		}
	}
	if(key[3].key_single_flag)
	{
		key[3].key_single_flag = 0;
		pwm=!pwm;
		if (pwm)
		{
			HAL_TIM_PWM_Start(&htim17,TIM_CHANNEL_1);
			__HAL_TIM_SET_COMPARE(&htim17,TIM_CHANNEL_1,200);
		}else{
			
			HAL_TIM_PWM_Stop(&htim17, TIM_CHANNEL_1); // 停止PWM
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET); // 设置PA7为低电平
		}
	}
	
}
void outpark(uint8_t car_num)
{
   
		sscanf(car.carTime, "%4d%2d%2d%2d%2d", &car.Time.year, &car.Time.month, &car.Time.day, &car.Time.hour, &car.Time.min);
    // 计算两个时间点的总分钟数
    long carTimeInMin = dateToTotalMinutes(car.Time);
    long parkTimeInMin = dateToTotalMinutes(park[car_num].Time);
    // 计算经过的总时间（以分钟为单位），并转换为小时
    long diffInMin = carTimeInMin - parkTimeInMin;
    int hoursPassed = diffInMin / 60;
    // 如果不满一小时，则按一小时计算
    if(diffInMin % 60 > 0) {
        hoursPassed++;
    }

    // 保证至少为1小时
    if(hoursPassed <= 0) {
        hoursPassed = 1;
    }
		if(strcmp(car.carKind,"VNBR") ==0)
		{
			VNBRnums --;
			IDLEnums ++;
			stopprice=hoursPassed*VNBRprice;
		}else if(strcmp(car.carKind,"CNBR") ==0)
		{
			CNBRnums --;
			IDLEnums ++;
			stopprice=hoursPassed*CNBRprice;
		}
		memset(&park[car_num],0,sizeof(park[car_num]));
    sprintf((char *)printtext,"%s:%s:%d:%.2f\r\n",car.carKind,car.carNum,hoursPassed,stopprice);
		HAL_UART_Transmit(&huart1,printtext,strlen((char *)printtext),50);

    
}

void inpark(void)
{
		sscanf(car.carTime, "%4d%2d%2d%2d%2d", &car.Time.year, &car.Time.month, &car.Time.day, &car.Time.hour, &car.Time.min);
    for (int i = 0; i < 8; i++) {
        // 查找第一个空位
        if (park[i].carNum[0] == '\0') { // 假设未使用的车位carNum为'\0'
            park[i] = car;

            // 更新车位统计信息
            if (strcmp(car.carKind, "CNBR") == 0) {
                CNBRnums++;
                IDLEnums--;
            } else if (strcmp(car.carKind, "VNBR") == 0) {
                VNBRnums++;
                IDLEnums--;
            }

            break; // 退出循环
        }
    }

}


void usart1_process(void)
{
	if(rxflag)
	{
		rxflag = 0;
		rxindex = 0;
		int parsedItems = sscanf((char*)rxbuffer,"%4s:%4s:%12s",car.carKind,car.carNum,car.carTime);
		if(parsedItems == 3)
		{
			if(strcmp(car.carKind,"CNBR")==0||strcmp(car.carKind,"VNBR")==0)//格式正确
			{
				for(int i = 0;i < 8;i++)
				{
					if(strcmp(park[i].carNum,car.carNum)==0) //车库中有，需要出库
					{
						if(strcmp(park[i].carKind,car.carKind) == 0)
						{
							outpark(i);
							break;
						}else{
							isError = 1;
						}
					}else if(strcmp(park[i].carNum,car.carNum)!=0&&IDLEnums>0)//车库中没有需要，入库
					{
						inpark();
						break;
					}
				}
			
			}else
        {
            isError = 1;
        }
			
		}else
			{
					isError = 1;
			}
		rxflag = 0;
		rxindex = 0;
		HAL_UART_Receive_IT(&huart1,rxdata,1);
	}
}

void isErrorProcess(void)
{
	if(isError == 1)
	{
		sprintf((char *)printtext,"Error\r\n");
		HAL_UART_Transmit(&huart1,(uint8_t*)printtext,strlen((char *)printtext),50);
		isError = 0;
	}
}
void lcd_process(void)
{
	switch (view)
  {
  	case 1://车位显示页面
		{
			sprintf((char *)lcdtext,"       Data");
			LCD_DisplayStringLine(Line1,lcdtext);
			sprintf((char *)lcdtext,"  CNBR:%d",CNBRnums);
			LCD_DisplayStringLine(Line3,lcdtext);
			sprintf((char *)lcdtext,"  VNBR:%d",VNBRnums);
			LCD_DisplayStringLine(Line5,lcdtext);
			sprintf((char *)lcdtext,"  IDLE:%d",IDLEnums);
			LCD_DisplayStringLine(Line7,lcdtext);
		}
  	break;
  	case 2: //费率设置页面
		{
			sprintf((char *)lcdtext,"       Para");
			LCD_DisplayStringLine(Line1,lcdtext);
			sprintf((char *)lcdtext,"  CNBR:%.2f",CNBRprice);
			LCD_DisplayStringLine(Line3,lcdtext);
			sprintf((char *)lcdtext,"  VNBR:%.2f",VNBRprice);
			LCD_DisplayStringLine(Line5,lcdtext);
		}
  		break;
  }
}
void led_process(void)
{
	if(IDLEnums>0)
	{
		led1enable = 1;
	}else{
		led1enable = 0;
	}
	if(pwm==1)
	{
		led2enable = 1;
	}else{
		led2enable = 0;
	}
	if(led1enable)
	{
		led|=0x01;
	}else{
		led&=~0x01;
	}
	if(led2enable)
	{
		led|=0x02;
	}else{
		led&=~0x02;
	}
	led_Display(led);
}

void lcdclear()
{
    LCD_Clear(Black);
    LCD_SetBackColor(Black);
    LCD_SetTextColor(White);
}

int isLeapYear(int year) {
    if (year % 4 != 0) return 0;
    if (year % 100 != 0) return 1;
    if (year % 400 == 0) return 1;
    return 0;
}
long dateToTotalMinutes(struct Times t) {
    // 添加之前的年份所包含的分钟数
    long totalMinutes = (t.year - 1) * 365 * 24 * 60;
    
    // 添加闰年的额外分钟数
    totalMinutes += ((t.year - 1) / 4 - (t.year - 1) / 100 + (t.year - 1) / 400) * 24 * 60;
    
    // 添加当前年份中之前月份的分钟数
    for (int i = 0; i < t.month - 1; i++) {
        totalMinutes += monthDays[i] * 24 * 60;
    }
    
    // 如果当前年份是闰年并且月份大于2，则额外添加一天的分钟数
    if (t.month > 2 && isLeapYear(t.year)) totalMinutes += 24 * 60;
    
    // 添加当前月份中的天数、小时和分钟
    totalMinutes += (t.day - 1) * 24 * 60; // 天数减1，因为当天不满24小时
    totalMinutes += t.hour * 60;
    totalMinutes += t.min;

    return totalMinutes;
}
/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
    /* User can add his own implementation to report the file name and line number,
       tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516

key.c

#include "key.h"
struct Key key[4]={0,0,0,0};
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	if(htim->Instance==TIM2)
	{
		 key[0].key_gpio =  HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);
		 key[1].key_gpio =  HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);
		 key[2].key_gpio =  HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);
		 key[3].key_gpio =  HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);
		 for(int i = 0;i<4;i++)
     {
			 switch (key[i].key_status)
       {
				 case 0:
				{
					if(key[i].key_gpio==0)
					{
						key[i].key_status = 1;
					}
				}
       		break;
       	case 1:
				{
					if(key[i].key_gpio==0)
					{
						key[i].key_single_flag = 1;
						key[i].key_status = 2;
					}else{
						key[i].key_status = 0;
					}
				}
       		break;
       	case 2:
				{
					if(key[i].key_gpio==1)
					{
						
						key[i].key_status = 0;
					}
					
				}
       	break;
       }
     }
	}
	
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

led.c

#include "led.h"

void led_Display(uint8_t led)
{
	HAL_GPIO_WritePin(GPIOC,GPIO_PIN_All,GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
	HAL_GPIO_WritePin(GPIOC,led<<8,GPIO_PIN_RESET);
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
}


1
2
3
4
5
6
7
8
9
10
11
12
13

usart1.c

#include "usart1.h"
#include "usart.h"
#include "string.h"
uint8_t rxflag;
uint8_t rxdata[1];
uint8_t rxindex = 0;
uint8_t rxbuffer[22];

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
		if(huart->Instance==USART1)
		{
			rxbuffer[rxindex++] = rxdata[0];
			HAL_UART_Receive_IT(huart,rxdata,1);
			if(rxindex==22)
			{
				rxflag = 1;
			}
		}

}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

程序很常规，只有串口那里处理比较麻烦，有几个注意事项

• 使用或和与操作实现单独对led某一位进行操作
• 需要判断闰年
• 处理错误，有好几种
• sscanf解析字符串