蓝桥杯嵌入式CT117E硬件开发平台经验分享09 | 2011蓝桥杯赛题

蓝桥杯嵌入式CT117E硬件开发平台 | 2011天华杯（蓝桥杯）赛题解答

本人也是从开始接触STM32到最后多少有点熟悉，因为之前只做过51单片机，对于STM32了解的还是比较少的，因此代码也是从最原来的杂乱到最后多少有点结构的想法，慢慢进步的一个过程，第一届赛题设计，对整体把握略微不足。本文章仅作大致讲解，具体实现方法可自行下载完整工程源代码及试题： 模拟停车场停车计费系统试题解答。

1. 拿到赛题后，第一步则是先做出来显示界面，因为LCD驱动已给，所以显示界面还是很快上手的一个任务突破点。在做显示的时候，按照之前讲解的思路设计显示函数和结构体。如下所示：
   

typedef enum{   
	LCDMENU_CARIN = 0,
	LCDMENU_CAROUT
}LCDMENU_TypeDef;
/*****************************************
LCD显示处理；
*****************************************/
char LCD_DisBuff[20]={0};
LCDMENU_TypeDef LCD_MENU = LCDMENU_CARIN;
void LCD_Proc()
{
	static LCDMENU_TypeDef LCD_MenuState_Last = LCDMENU_CARIN;
	if(LCD_MENU != LCD_MenuState_Last)    //传入界面不一样，做的工作，需要清屏一次
	{
		LCD_MenuState_Last = LCD_MENU;
		LCD_Clear(White);
		LCD_SetBackColor(White);
		LCD_SetTextColor(Blue);	
	}
	if(LCD_MENU == LCDMENU_CARIN)
	{
		LCD_DisplayStringLine(Line3 ,(unsigned char *)"  ID Code   Time   ");
		memset(LCD_DisBuff,'0',sizeof(LCD_DisBuff));
		sprintf(LCD_DisBuff,"    %d   %02d:%02d:%02d   ",IDx,PARKING_Structure[IDx].Idx_hour, \
							PARKING_Structure[IDx].Idx_min,PARKING_Structure[IDx].Idx_sec);
		LCD_DisplayStringLine(Line5 ,(unsigned char *)LCD_DisBuff);
		memset(LCD_DisBuff,'0',sizeof(LCD_DisBuff));
		sprintf(LCD_DisBuff,"            Rates:%d",Rates);
		LCD_DisplayStringLine(Line8 ,(unsigned char *)LCD_DisBuff);
	}
	else if(LCD_MENU == LCDMENU_CAROUT)
	{
		LCD_DisplayStringLine(Line3 ,(unsigned char *)"  ID Code   Fee   ");
		memset(LCD_DisBuff,'0',sizeof(LCD_DisBuff));
		sprintf(LCD_DisBuff,"    %d        %d   ",IDx,PARKING_Structure[IDx].IDx_Fee);
		LCD_DisplayStringLine(Line5 ,(unsigned char *)LCD_DisBuff);
		memset(LCD_DisBuff,'0',sizeof(LCD_DisBuff));
		sprintf(LCD_DisBuff,"            Rates:%d",Rates);
		LCD_DisplayStringLine(Line8 ,(unsigned char *)LCD_DisBuff);
	}
	else
	{
		
	}
}

2. 显示界面可以后则是按键输入任务
   

typedef struct{		
	u8 Idx_hour;
	u8 Idx_min;
	u8 Idx_sec;
	u16 IDx_Fee;
	JUDGE_TypeDef IsPark;
}PARKING_TypeDef;
void KEY_Proc(u8 key_num)
{
	u8 i=0;
	if(key_num != 0xff)  // There are remaining parking spaces
	{
		switch(key_num)
		{
			case 1:
					LCD_MENU = LCDMENU_CARIN;
					if(IsPark_Count >= 10)
						BUZ_Structure.IS_KEY_PARKING_FULL = TRUE;						
					else
					{
						BUZ_Structure.IS_KEY_PARKING_FULL = FAUSE;	
						while(USART2REC_Structure.IS_USART2_RecSucess == FAUSE)
						{
							LED_Control(LED7,REVERSE);	
							BUZ_Control(REVERSE);
							DelaySisTick_Time(DELAY_SISTICKTIMESET_MS(200));
						}
						LED_Control(LED7,OFF);	
						BUZ_Control(OFF);
						if(USART2REC_Structure.USART2_RecTab[0] == 'I')
						{
							IDx = (USART2REC_Structure.USART2_RecTab[2] - 0x30);
							if(USART2REC_Structure.USART2_RecTab[2] == '1' && USART2REC_Structure.USART2_RecTab[3] == '0')
							{
								IDx = 10;
							}
							USART2REC_Structure.IS_USART2_RecSucess = FAUSE;
						}					
						PARKING_Structure[IDx].Idx_sec = PARKING_Structure[IDx].Idx_min = PARKING_Structure[IDx].Idx_hour = 0;
						PARKING_Structure[IDx].IsPark = TRUE;								
					}						
					break;
			case 2:			
					LCD_MENU = LCDMENU_CAROUT;					
					while(USART2REC_Structure.IS_USART2_RecSucess == FAUSE)
					{
						LED_Control(LED8,REVERSE);	
						BUZ_Control(REVERSE);
						DelaySisTick_Time(DELAY_SISTICKTIMESET_MS(200));
					}
					LED_Control(LED8,OFF);	
					BUZ_Control(OFF);
					if(USART2REC_Structure.USART2_RecTab[0] == 'I')
					{
						IDx = (USART2REC_Structure.USART2_RecTab[2] - 0x30);
						if(USART2REC_Structure.USART2_RecTab[2] == '1' && USART2REC_Structure.USART2_RecTab[3] == '0')
						{
							IDx = 10;
						}
						USART2REC_Structure.IS_USART2_RecSucess = FAUSE;
					}	
					PARKING_Structure[IDx].IDx_Fee = PARKING_Structure[IDx].Idx_sec * Rates;
					PARKING_Structure[IDx].IsPark = FAUSE;										
					break;
			case 3:
					IDx ++;	
					if(IDx > 10)
						IDx = 1;								
					break;
			case 4:
					if(LCD_MENU == LCDMENU_CARIN)
						LCD_MENU = LCDMENU_CAROUT;
					else
						LCD_MENU = LCDMENU_CARIN;
					break;
			default :
						break;
		}
	}
	IsPark_Count = 0;
	for(i = 1 ;i < 11;i++)
	{
		if(PARKING_Structure[i].IsPark == TRUE)
			IsPark_Count ++ ;
	}
}

3. 既然是任务要求，免不了初始化 的了，之所以现在提，则是因为需要考虑定义多少变量，都需要定义并使用哪些，以及如何定义，是结构体类型还是什么类型等，因此这一步则是结合前面时候及时更新的初始化操作。
   

	extern char LCD_DisBuff[20];
	extern LCDMENU_TypeDef LCD_MENU;
	
	extern BUZ_TypeDef BUZ_Structure;
	
	u8 IDx = 1;
	u8 Rates = 1;
	u8 IsPark_Count = 0;
	PARKING_TypeDef PARKING_Structure[11];
	
    DelaySisTick_Init(SISTICK_10US,1);
	
	STM3210B_LCD_Init();
	LCD_Clear(White);
	LCD_SetBackColor(White);
	LCD_SetTextColor(Blue);	

	LED_Init();
	LED_Control(LEDALL,OFF);
	Key_Init();
	BUZ_Init();
	USART2_Config();
	USART2_SendString("\r\nUSART2 TEST:\r\n");
	TIM3_Config();

4. 串口操作，关于串口的接收之后的处理。
   

// 串口接收，串口中断设计
	if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)   //使用 if 语句来判断是否是真的产生 USART 数据接收这个中断事件
	{
		USART_ClearITPendingBit(USART2, USART_IT_RXNE);
		ucTemp = USART_ReceiveData(USART2);
		if(ucTemp == 'I' || ucTemp == 'F' )
		{	
			USART2REC_Structure.USART2_RecNum = 0;
			memset(USART2REC_Structure.USART2_RecTab,0x00,USART2_RecTab_Max);
		}
		if(ucTemp == '\n')
			USART2REC_Structure.IS_USART2_RecSucess = TRUE;
//		if(USART2REC_Structure.USART2_RecNum > 2)
//			USART2REC_Structure.IS_USART2_RecSucess = TRUE;
		if(USART2REC_Structure.IS_USART2_RecSucess == FAUSE)
			USART2REC_Structure.USART2_RecTab[USART2REC_Structure.USART2_RecNum++] = USART_ReceiveData(USART2);
		if(USART2REC_Structure.USART2_RecNum > USART2_RecTab_Max - 1)
		{
			USART2REC_Structure.USART2_RecNum = 0;
		}
	}
/*****************************************
串口数据的处理；
*****************************************/
extern USART2REC_TypeDef USART2REC_Structure;
void USERT2_Proc()
{
	if(USART2REC_Structure.IS_USART2_RecSucess == TRUE)
	{
//		USART2_SendString(USART2REC_Structure.USART2_RecTab);   //发送到串口中断测试接收正确性
		if(USART2REC_Structure.USART2_RecTab[0] == 'F')
		{
			Rates = (USART2REC_Structure.USART2_RecTab[2] - 0x30);
			if(USART2REC_Structure.USART2_RecTab[2] == '1' && USART2REC_Structure.USART2_RecTab[3] == '0')
			{
				Rates = 10;
			}
			USART2REC_Structure.IS_USART2_RecSucess = FAUSE;
		}
	}	
}

5. LED指示灯操作和蜂鸣器操作，放在最后，也是最方便做的，在处理数据时候放是否LED工作的标志位和蜂鸣器工作的标志位即可。
   

两种状态类型定义：
typedef enum{		
	OFF = 0,
	ON = 1,
	REVERSE = 2
}STATE_TypeDef;

typedef enum{		
	FAUSE = 0,
	TRUE = 1
}JUDGE_TypeDef;


void LED_Proc()
{
	if(IsPark_Count < 10)  // There are remaining parking spaces
	{
		LED_Control(LED1,ON);	
		LED_Control(LED2,OFF);	
	}
	else
	{
		LED_Control(LED2,ON);	
		LED_Control(LED1,OFF);	
	}	
}
/*****************************************
蜂鸣器处理；
*****************************************/
BUZ_TypeDef BUZ_Structure;
void BUZ_Proc(void)
{
	if(BUZ_Structure.IS_KEY_PARKING_FULL == TRUE)
		BUZ_Control(ON);
	else
		BUZ_Control(OFF);
}