一.题目分析
(1).题目
(2).题目分析
1..按键功能分析
a. B1界面切换
b. B2每次按下,PA6手动模式占空比参数增加10%
c. B3每次按下,PA7手动模式占空比参数增加10%
d. B4模式切换
f. 在数据显示界面下每次按下B3按键,互换PA6和PA7输出脉冲信号频率
(3).逻辑导图
二.CubeMX配置
由于蓝桥杯使用的板子都是STM32G431RBT6,配置都是相同的,模板已经在第六届蓝桥杯嵌入式省赛程序设计题解析(基于HAL库)-CSDN博客配置完成,大家可以前往学习
三.相关代码实现
(1)MAIN
1.全局变量声明
#include "main.h"
#include "RCC\bsp_rcc.h"
#include "KEY_LED\bsp_key_led.h"
#include "LCD\bsp_lcd.h"
#include "ADC\bsp_adc.h"
#include "TIM\bsp_tim.h"//***全局变量声明区
//*减速变量
__IO uint32_t uwTick_Key_Set_Point = 0;//控制Key_Proc的执行速度
__IO uint32_t uwTick_Led_Set_Point = 0;//控制Led_Proc的执行速度
__IO uint32_t uwTick_Lcd_Set_Point = 0;//控制Lcd_Proc的执行速度//*按键扫描专用变量
uint8_t ucKey_Val, unKey_Down, ucKey_Up, ucKey_Old;//*LED专用变量
uint8_t ucLed;//*LCD显示专用变量
uint8_t Lcd_Disp_String[21];//最多显示20个字符//全局变量
_Bool Lcd_Show_State;//0- 数据界面,1- 参数界面
uint8_t PWM_Running_State = 2;
float R37_Voltage;
uint8_t PA6_Duty_Int = 10;
uint8_t PA7_Duty_Int = 10;//***子函数声明区
void Key_Proc(void);
void Led_Proc(void);
void Lcd_Proc(void);
2.系统主函数
//***系统主函数
int main(void)
{/* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* Configure the system clock */SystemClock_Config();/*bsp资源的初始化*/KEY_LED_Init();LCD_Init();LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White); ADC2_Init();PWM_OUTPUT_TIM3_Init();PWM_OUTPUT_TIM17_Init();//PA6绿色__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, 1000);__HAL_TIM_SET_AUTORELOAD(&htim3, 9999); //PA7黄色__HAL_TIM_SET_COMPARE(&htim17, TIM_CHANNEL_1, 500);__HAL_TIM_SET_AUTORELOAD(&htim17, 4999); //*启动定时器3和定时器17通道输出HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_1); //PA6HAL_TIM_PWM_Start(&htim17,TIM_CHANNEL_1); //PA7while (1){Key_Proc();Led_Proc();Lcd_Proc();}}
3.按键扫描子函数
a.逻辑框图
b.程序源码
//***按键扫描子函数
void Key_Proc(void)
{if((uwTick - uwTick_Key_Set_Point)<50) return;//减速函数uwTick_Key_Set_Point = uwTick;ucKey_Val = Key_Scan();unKey_Down = ucKey_Val & (ucKey_Old ^ ucKey_Val); ucKey_Up = ~ucKey_Val & (ucKey_Old ^ ucKey_Val); ucKey_Old = ucKey_Val;switch(unKey_Down){case 1://B1Lcd_Show_State ^= 1;LCD_Clear(Black);break;case 2://B2if(Lcd_Show_State == 1)//当处于参数界面{PA6_Duty_Int += 10;if(PA6_Duty_Int == 100) PA6_Duty_Int = 10; }break; case 3://B3 //0- 数据界面,1- 参数界面if(Lcd_Show_State == 0)//当处于数据界面{if(PWM_Running_State == 0) PWM_Running_State = 1;else if(PWM_Running_State == 1) PWM_Running_State = 0;else if(PWM_Running_State == 2) PWM_Running_State = 3;else if(PWM_Running_State == 3) PWM_Running_State = 2; }if(Lcd_Show_State == 1)//当处于参数界面{PA7_Duty_Int += 10;if(PA7_Duty_Int == 100) PA7_Duty_Int = 10; }break; case 4://B4if(PWM_Running_State == 0) PWM_Running_State = 2;else if(PWM_Running_State == 2) PWM_Running_State = 0;else if(PWM_Running_State == 1) PWM_Running_State = 3;else if(PWM_Running_State == 3) PWM_Running_State = 1; break;}
3.LED扫描子函数
a.逻辑框图
b.程序源码
//***LED扫描子函数
void Led_Proc(void)
{if((uwTick - uwTick_Led_Set_Point)<200) return;//减速函数uwTick_Led_Set_Point = uwTick;if(PWM_Running_State >= 2)//自动模式{ ucLed |= 0x01;//LD1点亮}else //手动模式{ucLed &= (~0x01);//LD1熄灭 }if(Lcd_Show_State)//参数界面{ucLed &= (~0x02);//LD2熄灭 }else//数据界面{ucLed |= 0x02;//LD2点亮 }LED_Disp(ucLed);
}
3.LCD扫描子函数
a.逻辑框图
b.程序源码
void Lcd_Proc(void)
{if((uwTick - uwTick_Lcd_Set_Point)<100) return;//减速函数uwTick_Lcd_Set_Point = uwTick;//数据采集区R37_Voltage = ((((float)getADC2())/4096)*3.3);//我的显示if(Lcd_Show_State == 0)//数据界面{sprintf((char *)Lcd_Disp_String, " Data");LCD_DisplayStringLine(Line0, Lcd_Disp_String); sprintf((char *)Lcd_Disp_String, " V:%4.2fV",R37_Voltage);LCD_DisplayStringLine(Line2, Lcd_Disp_String); if(PWM_Running_State <= 1){sprintf((char *)Lcd_Disp_String, " Mode:MANU");LCD_DisplayStringLine(Line4, Lcd_Disp_String); }else{sprintf((char *)Lcd_Disp_String, " Mode:AUTO");LCD_DisplayStringLine(Line4, Lcd_Disp_String); } }else //参数界面{sprintf((char *)Lcd_Disp_String, " Para");LCD_DisplayStringLine(Line0, Lcd_Disp_String); sprintf((char *)Lcd_Disp_String, " PA6:%02d%%",(unsigned int)PA6_Duty_Int);LCD_DisplayStringLine(Line2, Lcd_Disp_String); sprintf((char *)Lcd_Disp_String, " PA7:%02d%%",(unsigned int)PA7_Duty_Int);LCD_DisplayStringLine(Line4, Lcd_Disp_String); }//数据输出区switch(PWM_Running_State){case 0:__HAL_TIM_SET_AUTORELOAD(&htim3, 9999); //PA6(绿色)的频率为100hz__HAL_TIM_SET_AUTORELOAD(&htim17, 4999);//PA7(黄色)的频率为200hz__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, (100*PA6_Duty_Int));//PA6(绿色)的占空比跟随设置__HAL_TIM_SET_COMPARE(&htim17, TIM_CHANNEL_1, (50*PA7_Duty_Int));//PA7(黄色)的占空比跟随设置 break;case 1:__HAL_TIM_SET_AUTORELOAD(&htim3, 4999); //PA6(绿色)的频率为200hz__HAL_TIM_SET_AUTORELOAD(&htim17, 9999);//PA7(黄色)的频率为100hz__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, (50*PA6_Duty_Int));//PA6(绿色)的占空比跟随设置__HAL_TIM_SET_COMPARE(&htim17, TIM_CHANNEL_1, (100*PA7_Duty_Int));//PA7(黄色)的占空比跟随设置 break; case 2:__HAL_TIM_SET_AUTORELOAD(&htim3, 9999); //PA6(绿色)的频率为100hz__HAL_TIM_SET_AUTORELOAD(&htim17, 4999);//PA7(黄色)的频率为200hz__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, (unsigned int)(10000*(R37_Voltage/3.3)));//PA6(绿色)的占空比跟随设置__HAL_TIM_SET_COMPARE(&htim17, TIM_CHANNEL_1, (unsigned int)(5000*(R37_Voltage/3.3)));//PA7(黄色)的占空比跟随设置 break; case 3:__HAL_TIM_SET_AUTORELOAD(&htim3, 4999); //PA6(绿色)的频率为200hz__HAL_TIM_SET_AUTORELOAD(&htim17, 9999);//PA7(黄色)的频率为100hz__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, (unsigned int)(5000*(R37_Voltage/3.3)));//PA6(绿色)的占空比跟随设置__HAL_TIM_SET_COMPARE(&htim17, TIM_CHANNEL_1, (unsigned int)(10000*(R37_Voltage/3.3)));//PA7(黄色)的占空比跟随设置 break; }
}
(2)BSP
在第六届蓝桥杯嵌入式省赛程序设计题解析(基于HAL库)-CSDN博客里面有详细的讲解,大家可前往此链接学习