【蓝桥杯_练习】

1.创建工程

2.LED灯点亮

• 高电平为默认不点亮
• PD2电平为低不用设置

led.c

#include "main.h"
#include "gpio.h"
#include "led.h"void LED_Disp(uchar dsLED)
{HAL_GPIO_WritePin(GPIOC,GPIO_PIN_All,GPIO_PIN_SET);
/* 
*  GPIO_PIN_RESET: 1有效置0   0无效保持原来状态
*  GPIO_PIN_SET  : 1有效置1   0无效保持原来状态
*  GPIOC 1111 1111 1111 1111  
*///LED的引脚GPIO的C组的前八位所以左移八位HAL_GPIO_WritePin(GPIOC,dsLED<<8,GPIO_PIN_RESET);
/*  
*   dsLED=0x00<<8 0000 0000 0000 0000  GPIOC 1111 1111 1111 1111
*   dsLED=0xff<<8 1111 1111 0000 0000  GPIOC 0000 0000 0000 0000 
*///打开锁存器HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
}main()
{HAL_Init();SystemClock_Config();MX_GPIO_Init();LED_Disp(0x00);//全部熄灭while (1){LED_Disp(0x00);HAL_Delay(500);LED_Disp(0xff);//全点亮HAL_Delay(500);}
}

3.LCD液晶屏显示

lcd.c

int main(void)
{char text[30];uint i=5;HAL_Init();SystemClock_Config();MX_GPIO_Init();LCD_Init();//LCD屏初始化	LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);sprintf(text,"       SCH%d     ",i);LCD_DisplayStringLine(Line4, (uint8_t *)text);while (1){HAL_Delay(500);}
}

4.定时器按键单机

interrupt.h

#ifndef _INTERRUPT_H_
#define _INTERRUPT_H_#include "main.h"
#include "stdbool.h"struct keys 
{uchar judge_sta;  //进行到底几步bool key_sta;     //按键的状态bool single_flag; //当按键按下为1
};#endif

interrupt.c

#include "interrupt.h"
struct keys key[4]={0,0,0};
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{if(htim->Instance==TIM3){key[0].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);key[1].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);key[2].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);key[3].key_sta=HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);for(int i=0;i<4;++i){switch(key[i].judge_sta){case 0:{if(key[i].key_sta==0)  key[i].judge_sta=1;else key[i].judge_sta=0;}break;case 1:{if(key[i].key_sta==0){key[i].judge_sta=2;key[i].single_flag=1;}		elsekey[i].judge_sta=0;			}break;case 2:{if(key[i].key_sta==1){key[i].judge_sta=0;}}break;}}	}
}

man.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"extern struct keys key[];int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim3);//定时器中断char text[30];while (1){if(key[0].single_flag==1){key[0].single_flag=0;sprintf(text,"       Key0     ");LCD_DisplayStringLine(Line8, (uint8_t *)text);}if(key[1].single_flag==1){key[1].single_flag=0;sprintf(text,"       Key1     ");LCD_DisplayStringLine(Line8, (uint8_t *)text);}}
}

5.定时器（长按键）

interrupt.h

#ifndef _INTERRUPT_H_
#define _INTERRUPT_H_#include "main.h"
#include "stdbool.h"struct keys 
{uchar judge_sta;  //进行到底几步bool key_sta;     //按键的状态bool single_flag; //当按键按下为1bool long_flag;   //长按键uint key_time;    //按下累计的时间
};#endif

interrupt.c

#include "interrupt.h"
struct keys key[4]={0,0,0};
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{if(htim->Instance==TIM3){key[0].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);key[1].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);key[2].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);key[3].key_sta=HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);for(int i=0;i<4;++i){switch(key[i].judge_sta){case 0:{if(key[i].key_sta==0){						 key[i].judge_sta=1;key[i].key_time=0;}else key[i].judge_sta=0;}break;case 1:{if(key[i].key_sta==0){key[i].judge_sta=2;}		elsekey[i].judge_sta=0;}break;case 2:{if(key[i].key_sta==1){key[i].judge_sta=0;if(key[i].key_time<70)key[i].single_flag=1;}else {key[i].key_time++;if(key[i].key_time>70)key[i].long_flag=1;}}break;}}}
}

main.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"
extern struct keys key[];
uchar view;void key_pro(void);
void disp_pro(void);int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();/* USER CODE BEGIN 2 */LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim3);while (1){		key_pro();disp_pro();}
}void key_pro(void)
{if(key[0].single_flag==1){view=!view;key[0].single_flag=0;}
}void disp_pro(void)
{if(view==0){char text[30];sprintf(text,"       Data     ");LCD_DisplayStringLine(Line1, (uint8_t *)text);}else{char text[30];sprintf(text,"   Para     ");LCD_DisplayStringLine(Line1, (uint8_t *)text);}		
}

6.PWM

main.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"extern struct keys key[];
uchar view;uchar pa6_duty=10;
uchar pa7_duty=10;void key_pro(void);
void disp_pro(void);void SystemClock_Config(void);int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();MX_TIM16_Init();MX_TIM17_Init();LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim3);//开启定时器3的中断HAL_TIM_PWM_Start (&htim16, TIM_CHANNEL_1);//PWM开启HAL_TIM_PWM_Start(&htim17, TIM_CHANNEL_1);while (1){key_pro();disp_pro();}
}/* USER CODE BEGIN 4 */
void key_pro(void)
{if(key[0].single_flag==1){view=!view;LCD_Clear(Black);key[0].single_flag=0;}if(key[1].single_flag==1){pa6_duty=pa6_duty%90+10;__HAL_TIM_SetCompare(&htim16, TIM_CHANNEL_1,pa6_duty);//控制占空比key[1].single_flag=0;}if(key[2].single_flag==1){pa7_duty=pa7_duty%90+10;__HAL_TIM_SetCompare(&htim17, TIM_CHANNEL_1,pa7_duty);//控制占空比key[2].single_flag=0;}
}void disp_pro(void)
{if(view==0){char text[30];sprintf(text,"       Data     ");LCD_DisplayStringLine(Line1, (uint8_t *)text);}else{char text[30];sprintf(text,"       Para     ");LCD_DisplayStringLine(Line1, (uint8_t *)text);sprintf(text,"    PA6:%d     ",pa6_duty);LCD_DisplayStringLine(Line2, (uint8_t *)text);sprintf(text,"    PA7:%d     ",pa7_duty);LCD_DisplayStringLine(Line3, (uint8_t *)text);}		
}

7.定时器-输入捕获（频率，占空比测量）

interrupt.c

#include"interrupt.h"
/测量频率+占空比///
double ccr1_val1a=0,ccr1_val2a=0;
double ccr1_val1b=0,ccr1_val2b=0;
uint frq1=0,frq2=0;//频率
float duty1=0,duty2=0;//占空比
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{if(htim->Instance==TIM2){if(htim->Channel==HAL_TIM_ACTIVE_CHANNEL_1)//中断消息来源 选择直接输入的通道{ccr1_val1a=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_1);//直接ccr1_val1b=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_2);//间接__HAL_TIM_SetCounter(htim,0);frq1=(80000000/80)/ccr1_val1a;duty1=(ccr1_val1b/ccr1_val1a)*100;HAL_TIM_IC_Start(htim,TIM_CHANNEL_1);HAL_TIM_IC_Start(htim,TIM_CHANNEL_2);}}if(htim->Instance==TIM3){if(htim->Channel==HAL_TIM_ACTIVE_CHANNEL_1)//中断消息来源 选择直接输入的通道{ccr1_val2a=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_1);ccr1_val2b=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_2);__HAL_TIM_SetCounter(htim,0);frq2=(80000000/80)/ccr1_val2a;duty2=(ccr1_val2b/ccr1_val2a)*100;HAL_TIM_IC_Start(htim,TIM_CHANNEL_1);HAL_TIM_IC_Start(htim,TIM_CHANNEL_2);}}
}

main.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"extern struct keys key[];
extern uint frq1,frq2;
extern float duty1,duty2;uchar view;
uchar pa6_duty=10;
uchar pa7_duty=10;void key_pro(void);
void disp_pro(void);int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();MX_TIM16_Init();MX_TIM17_Init();MX_TIM2_Init();MX_TIM4_Init();LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim4);//开启定时器4的中断HAL_TIM_PWM_Start (&htim16, TIM_CHANNEL_1);//PWM开启HAL_TIM_PWM_Start(&htim17, TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_1);//频率测量捕获定时器开启HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_2);//频率测量捕获定时器开启 间接通道HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_2);
//	__HAL_TIM_SetCompare(&htim16,TIM_CHANNEL_1,pa6_duty);//设置初始pwm频率__HAL_TIM_SetCompare(&htim17,TIM_CHANNEL_1,pa7_duty);while (1){key_pro();disp_pro();}
}void key_pro(void)
{if(key[0].single_flag==1){view=!view;LCD_Clear(Black);key[0].single_flag=0;}if(key[1].single_flag==1){pa6_duty=pa6_duty%90+10;__HAL_TIM_SetCompare(&htim16, TIM_CHANNEL_1,pa6_duty);//控制占空比key[1].single_flag=0;}if(key[2].single_flag==1){pa7_duty=pa7_duty%90+10;__HAL_TIM_SetCompare(&htim17, TIM_CHANNEL_1,pa7_duty);//控制占空比key[2].single_flag=0;}
}void disp_pro(void)
{if(view==0){char text[30];sprintf(text,"      Data      ");LCD_DisplayStringLine(Line1, (uint8_t *)text);sprintf(text,"     FRQ1=%d      ",frq1);LCD_DisplayStringLine(Line2, (uint8_t *)text);sprintf(text,"     duty1=%.3f      ",duty1);LCD_DisplayStringLine(Line3, (uint8_t *)text);	sprintf(text,"     FRQ2=%d      ",frq2);LCD_DisplayStringLine(Line4, (uint8_t *)text);sprintf(text,"     duty2=%.3f      ",duty2);LCD_DisplayStringLine(Line5, (uint8_t *)text);}else if(view==1){char text[30]; sprintf(text,"      Para      ");LCD_DisplayStringLine(Line1, (uint8_t *)text);sprintf(text,"    PA6:%d      ",pa6_duty);LCD_DisplayStringLine(Line2, (uint8_t *)text);sprintf(text,"    PA7:%d      ",pa7_duty);LCD_DisplayStringLine(Line4, (uint8_t *)text);}		
}

8.ADC模数转换

myadc.h

#ifndef _MYADC_H_
#define _MYADC_H_#include "main.h"
double getADC(ADC_HandleTypeDef *pin);#endif

myadc.c

#include "myadc.h"double getADC(ADC_HandleTypeDef *pin)
{uint adc; HAL_ADC_Start (pin); adc = HAL_ADC_GetValue (pin); return adc*3.3/4096;
}

main.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"
#include "myadc.h"extern struct keys key[];
extern uint frq1,frq2;
extern float duty1,duty2;uchar view;uchar pa6_duty=10;
uchar pa7_duty=10;void key_pro(void);
void disp_pro(void);int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();MX_TIM16_Init();MX_TIM17_Init();MX_TIM2_Init();MX_TIM4_Init();MX_ADC1_Init();MX_ADC2_Init();/* USER CODE BEGIN 2 */LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim4);//开启定时器4的中断HAL_TIM_PWM_Start (&htim16, TIM_CHANNEL_1);//PWM开启HAL_TIM_PWM_Start(&htim17, TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_1);//频率测量捕获定时器开启HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_2);//频率测量捕获定时器开启 间接通道HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_2);__HAL_TIM_SetCompare(&htim16,TIM_CHANNEL_1,pa6_duty);//设置初始pwm频率__HAL_TIM_SetCompare(&htim17,TIM_CHANNEL_1,pa7_duty);while (1){key_pro();disp_pro();}
}void disp_pro(void)
{if(view==0){char text[30];sprintf(text,"     ADC1=%.2f      ",getADC(&hadc1));LCD_DisplayStringLine(Line6, (uint8_t *)text);sprintf(text,"     ADC2=%.2f      ",getADC(&hadc2));LCD_DisplayStringLine(Line7, (uint8_t *)text);}else if(view==1){}		
}

9.IIC

i2c - hal.c

#include "i2c - hal.h"
uchar eeprom_read(uchar addr)
{uchar dat;I2CStart();I2CSendByte(0xa0);I2CWaitAck();I2CSendByte(addr);I2CWaitAck();//I2CStop();I2CStart();I2CSendByte(0xa1);I2CWaitAck();dat=I2CReceiveByte();//I2CWaitAck();I2CStop();return dat;
}void eeprom_write (uchar addr,uchar dat)
{I2CStart();I2CSendByte(0xa0);I2CWaitAck();I2CSendByte(addr);I2CWaitAck();I2CSendByte(dat);I2CWaitAck();I2CStop();
}

main.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"
#include "myadc.h"
#include "i2c - hal.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
extern struct keys key[];
extern uint frq1,frq2;
extern float duty1,duty2;uchar view=0;uchar pa6_duty=10;
uchar pa7_duty=10;void key_pro(void);
void disp_pro(void);
/* 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 *//* 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_TIM3_Init();MX_TIM16_Init();MX_TIM17_Init();MX_TIM2_Init();MX_TIM4_Init();MX_ADC1_Init();MX_ADC2_Init();/* USER CODE BEGIN 2 */LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);HAL_TIM_Base_Start_IT(&htim4);//开启定时器4的中断HAL_TIM_PWM_Start (&htim16, TIM_CHANNEL_1);//PWM开启HAL_TIM_PWM_Start(&htim17, TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_1);//频率测量捕获定时器开启HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_1);HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_2);//频率测量捕获定时器开启 间接通道HAL_TIM_IC_Start_IT(&htim3,TIM_CHANNEL_2);__HAL_TIM_SetCompare(&htim16,TIM_CHANNEL_1,pa6_duty);//设置初始pwm频率__HAL_TIM_SetCompare(&htim17,TIM_CHANNEL_1,pa7_duty);while (1){if(key[3].single_flag==1){uchar frq_h=frq1>>8;uchar frq_l=frq1&0xff;eeprom_write(1,frq_h);HAL_Delay(10);eeprom_write(2,frq_l);key[3].single_flag=0;}uint eeprom_val=(eeprom_read(1)<<8)+eeprom_read(2);sprintf(text,"     FRQ_eep=%d   ",eeprom_val);LCD_DisplayStringLine(Line8, (uint8_t *)text);	}
}

10.uart串口通信

interrupter.c

char rxdata[30];
uint8_t rxdat;
uchar rx_pointer;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *hurat)
{rxdata[rx_pointer++]=rxdat;HAL_UART_Receive_IT(&huart1,&rxdat,1);
}

mian.c

#include "led.h"
#include "lcd.h"
#include "stdio.h"
#include "interrupt.h"
#include "myadc.h"
#include "i2c - hal.h"
#include "string.h"extern struct keys key[];
extern char rxdata[30];
extern uint8_t rxdat;
extern uchar rx_pointer;uchar view=0;char car_type[5];
char car_data[5];
char car_time[13];void key_pro(void);
void disp_pro(void);
void uart_rx_proc(void);
int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM3_Init();MX_TIM16_Init();MX_TIM17_Init();MX_TIM2_Init();MX_TIM4_Init();MX_ADC1_Init();MX_ADC2_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */LED_Disp(0x00);//LCD初始化LCD_Init();//LCD屏初始化HAL_UART_Receive_IT(&huart1,&rxdat,1);//打开串口中断LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);while (1){key_pro();disp_pro();if(rx_pointer!=0){int temp=rx_pointer;HAL_Delay(1);if (temp==rx_pointer)uart_rx_proc();//完成接收}}
}void key_pro(void)
{if(key[0].single_flag==1){view=0;LCD_Clear(Black);key[0].single_flag=0;}
}void disp_pro(void)
{if(view==0){char text[30]; sprintf(text,"      Car_msg      ");LCD_DisplayStringLine(Line1, (uint8_t *)text);sprintf(text,"car_type=%s      ",car_type);LCD_DisplayStringLine(Line2, (uint8_t *)text);sprintf(text,"car_data=%s      ",car_data);LCD_DisplayStringLine(Line3, (uint8_t *)text);sprintf(text,"cat_time=%s      ",car_time);LCD_DisplayStringLine(Line4, (uint8_t *)text);		}
}void uart_rx_proc()
{if(rx_pointer>0){if(rx_pointer==22){sscanf(rxdata,"%4s:%4s:%12s",car_type,car_data,car_time);}else {char temp[20];sprintf(temp,"Error");HAL_UART_Transmit(&huart1,(uint8_t *)temp,strlen(temp),50);}rx_pointer=0;memset(rxdata,0,30);}
}