突击蓝桥杯嵌入式（十）——巩固训练，第十一届省赛第一场真题突击蓝桥杯嵌入式（十）——巩固训练，第十一届省赛第一场真题

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概述

突击蓝桥杯嵌入式（十）——巩固训练，第十一届省赛第一场真题

一、题干

在这里插入图片描述

二、题目解析

配置任务：

1.ADC:测量R37电压

2.LED:配置锁存器

3.按键3个

变量声明

uint8_t str[21];


__IO uint32_t uwTick_KEY_Speed;
__IO uint32_t uwTick_LCD_Speed;
__IO uint32_t uwTick_Check_Speed;


uint8_t key_value;
uint8_t key_old;
uint8_t key_down;
uint8_t key_up;

uint8_t LCD_flag;	//0:data	1:Para

float Dis_Vmin = 1;
float Dis_Vmax = 3;
float Vmin = 1;
float Vmax = 3;
float Volt;

uint8_t Stop_flag;
uint8_t Start_flag;
int	time;
uint16_t T=0;
uint8_t Time_flag;

LED

void LED_Disp(uint8_t ucled)
{
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|
										GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15,GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOC,ucled<<8,GPIO_PIN_RESET);
	HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
}

ADC

uint16_t get_r37_value()
{
	static uint16_t value;
	HAL_ADC_Start(&hadc2);
	HAL_ADCEx_Calibration_GetValue(&hadc2,3);
	HAL_ADC_PollForConversion(&hadc2,3);
	value = HAL_ADC_GetValue(&hadc2);
	HAL_ADC_Stop(&hadc2);
	return value;
}

KEY

uint8_t Key_Scan()
{
	static uint8_t value;
	if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0) == GPIO_PIN_RESET)	value = 1;
	else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1) == GPIO_PIN_RESET)	value = 2;
	else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2) == GPIO_PIN_RESET)	value = 3;
	else value = 0;
	return value;
}

void Key_Proc()
{
	if(uwTick - uwTick_KEY_Speed < 100)	return;
	else	uwTick_KEY_Speed = uwTick;
	key_value = Key_Scan();
	key_down = key_value&(key_value^key_old);
	key_up = -key_value&(key_value^key_old);
	key_old = key_value;
	switch(key_down)
	{
		case 1:
			LCD_flag^=1;
			if(LCD_flag == 0)
			{
				if(Dis_Vmax - Dis_Vmin >= 1 )
				{
					Vmax = Dis_Vmax;
					Vmin = Dis_Vmin;
				}
				LED_Disp(0X00);
			}
		break;
		case 2:
			if(LCD_flag == 1)
			{		
				Dis_Vmax += 0.1;
				if(Dis_Vmax > 3.3)
				{
					Dis_Vmax = 0;
				}
			}
		break;
		case 3:
			if(LCD_flag == 1)
			{
				Dis_Vmin += 0.1;
				if(Dis_Vmin > 3.3)
				{
					Dis_Vmin = 0;
				}
			}
		break;
	}
}

LCD

void Data_Display()
{
	T = time/10;
	sprintf((char *)str,"      Data             ");
	LCD_DisplayStringLine(Line0,str);
	sprintf((char *)str," V:%.2lfV         ",(get_r37_value()*3.3)/4096);
	LCD_DisplayStringLine(Line2,str);
	sprintf((char *)str," T:%ds           ",T);
	LCD_DisplayStringLine(Line3,str);
}



void Para_Display()
{
	sprintf((char *)str,"      Para             ");
	LCD_DisplayStringLine(Line0,str);
	sprintf((char *)str," Vmax:%.1lfV          ",Dis_Vmax);
	LCD_DisplayStringLine(Line2,str);
	sprintf((char *)str," Vmin:%.1lfV          ",Dis_Vmin);
	LCD_DisplayStringLine(Line3,str);
}


void LCD_Proc()
{
	if(uwTick - uwTick_LCD_Speed < 100)	return;
	else	uwTick_LCD_Speed = uwTick;
	if(LCD_flag == 0)
	{
		Data_Display();
	}
	else if(LCD_flag == 1)
	{
		Para_Display();
	}
}

检查函数

void Check_Proc()
{
	if(uwTick - uwTick_Check_Speed < 100)	return;
	else	uwTick_Check_Speed = uwTick;
	Volt = (get_r37_value()*3.3)/4096;
	if(Volt < Vmin)
	{
		Start_flag =1;
	}
	if(Start_flag == 1)
	{
		if(Volt*10 > Vmin*10)
		{
			Time_flag = 1;
			Start_flag = 0;
			time = 0;
		}
	}
	if(Time_flag == 1)
	{
		time++;
		LED_Disp(0x01);
	}
	if(Volt*10 > Vmax*10 )
	{
		Time_flag = 0;
		LED_Disp(0x00);
	}
	if(LCD_flag == 1)
	{
		if(Dis_Vmax - Dis_Vmin < 1 )
		{
			LED_Disp(0x02);
		}
	}
}