题目分析

主要用到了

按键：按键扫描，消抖处理 + 每个按键执行的任务
LCD：按照要求实现两个显示界面即可
LED：在按键按下的条件下，点亮或熄灭某个灯
ADC：获取R37输出的电压值，并以此控制PWM输出信号占空比
PWM：通过PA6和PA7引脚输出频率和占空比一定的波
功能模块

key

创建工程
按键刷新时间不大于100MS
按键扫描函数

LCD

添加lcd.c文件
刷新时间100ms
首先编写符合题目要求的LCD的两个显示界面

void task_display(void)
{
	if(LCD_show==1)
	{ 
		LCD_SetBackColor(Black);
		LCD_SetTextColor(White);

		LCD_DisplayStringLine(Line0,(unsigned char *)"      Data          ");	
		LCD_DisplayStringLine(Line1,(unsigned char *)"                    ");		
		sprintf((char *)str, "   V:%.2fV          ", R37_Value * 3.3 / 4096);
		LCD_DisplayStringLine(Line2, (uint8_t *)str);	
		LCD_DisplayStringLine(Line3,(unsigned char *)"                    ");			
		sprintf((char *)str, "   Mode:%s        ",mode_str);
		LCD_DisplayStringLine(Line4, (uint8_t *)str);	
		LCD_DisplayStringLine(Line5,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line6,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line7,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line8,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line9,(unsigned char *)"                    ");			
	}		
	else if(LCD_show==2)
	{
		LCD_SetBackColor(Black);
		LCD_SetTextColor(White);

		LCD_DisplayStringLine(Line0,(unsigned char *)"      Para          ");	
		LCD_DisplayStringLine(Line1,(unsigned char *)"                    ");		
		sprintf((char *)str, "   PA6:%d%%          ", PA6_Duty);
		LCD_DisplayStringLine(Line2, (uint8_t *)str);	
		LCD_DisplayStringLine(Line3,(unsigned char *)"                    ");			
		sprintf((char *)str, "   PA7:%d%%          ", PA7_Duty);
		LCD_DisplayStringLine(Line4, (uint8_t *)str);	
		LCD_DisplayStringLine(Line5,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line6,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line7,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line8,(unsigned char *)"                    ");	
		LCD_DisplayStringLine(Line9,(unsigned char *)"                    ");		
	}
}

按键and LED

先对按键进行扫描
接着编写按键对应的任务函数

按下B1

初始模式是数据界面，数据界面LD2点亮。按下B1，切换至参数界面，且LD2熄灭。
if(key_value== 1)
{
if(LCD_show== 1)
{
LCD_show=2;
LEDx_on(2);
}
else if(LCD_show==2)
{
LCD_show=1;
LEDx_off(2);
}
}

按下B2

在手动模式下，每按一下B2，占空比增加10%，占空比在10%到90%范围内变化。且仅在参数界面，B2起作用。
key_value=0;
if(LCD_show== 2)
{
PA6_Duty+=10;
if(PA6_Duty>=100)PA6_Duty=10;
if(mode== 1) __HAL_TIM_SET_COMPARE(&htim16, TIM_CHANNEL_1, 10000*PA6_Duty/PA6_Freq);
}

按下B3
同B2
按下B4

切换手动模式和自动模式。手动模式LED1熄灭
key_value=0;
if(mode== 0)
{
mode=1;
LEDx_off(1);
mode_str=“MANU”;
__HAL_TIM_SET_COMPARE(&htim16,TIM_CHANNEL_1,10000PA6_Duty/PA6_Freq);
__HAL_TIM_SET_COMPARE(&htim17,TIM_CHANNEL_1,10000PA7_Duty/PA7_Freq); //恢复初始数据
}
else if(mode== 1)
{
mode=0;
mode_str=“AUTO”;
LEDx_on(1);
}