合肥公司门户网站制作,东莞seo推广优化排名,建设银行 上海 招聘网站,一个网站占空间有多少g一、题目分析 考察内容#xff1a;
led按键#xff08;短按#xff09;PWM输出#xff08;PA1#xff09;串口接收lcd显示
根据PWM输出占空比调节#xff0c;高频与低频切换
串口接收#xff08;指令解析#xff09;【中断接收】
2个显示界面
led灯闪烁定时器
二… 一、题目分析 考察内容
led按键短按PWM输出PA1串口接收lcd显示
根据PWM输出占空比调节高频与低频切换
串口接收指令解析【中断接收】
2个显示界面
led灯闪烁定时器
二、Usr.c
/* Includes ------------------------------------------------------------------*/
#include usr.h
#include usart.h
/* values --------------------------------------------------------------------*/
struct keys key[4]{0,0,0,0};
uint8_t menu 0;
uint8_t password_valid 0;//密码有效信号
uint8_t password_err_3 0;//密码3次及以上输入错误信号
uint8_t password_err_time 0;//密码3次及以上输入错误次数
uint8_t B1 ;
uint8_t B2 ;
uint8_t B3 ;
uint16_t F 1000;
uint16_t D 50;
uint16_t password 123;//密码
/* define --------------------------------------------------------------------*/
#define MENU_PSD 0
#define MENU_STA 1/*----------------------------------------------------------------------------*/
void led_set(uint8_t led_dis)
{HAL_GPIO_WritePin(GPIOC,GPIO_PIN_All,GPIO_PIN_SET);//关闭所有ledHAL_GPIO_WritePin(GPIOC,led_dis8,GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
}
void led_2_toggle(void){HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_10,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_11,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_12,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_14,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOC,GPIO_PIN_15,GPIO_PIN_SET);HAL_GPIO_TogglePin(GPIOC,GPIO_PIN_9);HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);
}//key_control
void key_control(void)
{if(key[0].single_flag 1){key[0].single_flag 0;//仅在PSD有效if(menu MENU_PSD){if(B1 ){B1 0;}else{B1;if(B19){B1 0;}}}}else if(key[1].single_flag 1){key[1].single_flag 0;if(menu MENU_PSD){if(B2 ){B2 0;}else{B2;if(B29){B2 0;}}}}else if(key[2].single_flag 1){key[2].single_flag 0;if(menu MENU_PSD){if(B3 ){B3 0;}else{B3;if(B39){B3 0;}}} }else if(key[3].single_flag 1){ //密码输入完成确认key[3].single_flag 0;//此处要写密码判断if((B1-0)*100(B2-0)*10(B3-0) password){password_valid 1;}else{password_err_time ;}if(password_valid 1){menu MENU_STA;password_err_3 0;password_err_time 0;//输入成功将err次数清0}else{B1 ;B2 ;B3 ;if(password_err_time 3){password_err_3 1;}}}else{key[0].long_flag 0;key[1].long_flag 0;key[2].long_flag 0;key[3].long_flag 0;}
}
void dispaly_init(void){LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);
}
void menu_display(void)
{char text[30]{NULL};if(menu MENU_PSD){sprintf(text, PSD );LCD_DisplayStringLine(Line1,(u8*)text);sprintf(text, B1:%c ,B1);LCD_DisplayStringLine(Line3,(u8*)text);sprintf(text, B2:%c ,B2);LCD_DisplayStringLine(Line4,(u8*)text);sprintf(text, B3:%c ,B3);LCD_DisplayStringLine(Line5,(u8*)text);}else{fre_2hz_duty_10_set();sprintf(text, STA );LCD_DisplayStringLine(Line1,(u8*)text);sprintf(text, F:%d,F);LCD_DisplayStringLine(Line3,(u8*)text);sprintf(text, D:%d,D);LCD_DisplayStringLine(Line4,(u8*)text);LCD_ClearLine(Line5);}
}//2hz
void fre_2hz_duty_10_set(void)
{F 2000;D 10;__HAL_TIM_SetCompare(htim2,TIM_CHANNEL_2,100-1);//占空比百分之10__HAL_TIM_SET_PRESCALER(htim2,40-1);//2hz
}
//1hz 50%
void fre_1hz_duty_50_set(void){__HAL_TIM_SetCompare(htim2,TIM_CHANNEL_2,500-1);//占空比百分之50__HAL_TIM_SET_PRESCALER(htim2,80-1);//1hzF 2000;D 50;
}//定时器中断服务函数
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{if(htim-Instance TIM6){key[0].key_sta HAL_GPIO_ReadPin(B1_Port,B1_Pin);key[1].key_sta HAL_GPIO_ReadPin(B2_Port,B2_Pin);key[2].key_sta HAL_GPIO_ReadPin(B3_Port,B3_Pin);key[3].key_sta HAL_GPIO_ReadPin(B4_Port,B4_Pin);for(uint8_t i 0;i4;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;}else{key[i].judge_sta 0;}}break;case 2:{if(key[i].key_sta 1){if(key[i].key_time Short_time){key[i].single_flag 1;key[i].judge_sta 0;}}else{key[i].key_time;if(key[i].key_time Long_time){key[i].long_flag 1;key[i].judge_sta 0;}}}break;}}}if(htim-Instance TIM7){static uint16_t time 0;if(password_valid 1){password_err_3 0;led_set(0x01);F 2000;fre_2hz_duty_10_set();if(time 50-1){password_valid 0;led_set(0x00);time 0;menu MENU_PSD;B1 ;B2 ;B3 ;}else{time ;}}else if(password_err_3 1){static uint8_t cnt 0;cnt ;cnt % 2;//led2翻转if(cnt 0){led_set(0x02);}else{led_set(0x00);}//5s后接触报警if(time 50-1){password_err_3 0;led_set(0x00);time 0; //5s计时清零cnt 0;}else{time ; //计时}F 1000;fre_1hz_duty_50_set();//方波1hz}else{time 0;fre_1hz_duty_50_set();//方波1hz} }}//串口接收完成中断回调服务函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{if(huart-Instance USART1){led_set(0xaa);if(((recevie[0]-0)*100(recevie[1]-0)*10(recevie[2]-0) password)(recevie[3]) -){password (recevie[4]-0)*100(recevie[5]-0)*10(recevie[6]-0);}HAL_UART_Receive_IT(huart1,recevie,7);}
}三、Usr.h
#ifndef __USR_H__
#define __USR_H__#ifdef __cplusplus
extern C {
#endif/* Includes ------------------------------------------------------------------*/
#include main.h
#include lcd.h
#include stdio.h
#include tim.h
/* extern --------------------------------------------------------------------*/
extern uint8_t recevie[7];
//key
struct keys{uint8_t judge_sta;uint8_t key_sta;uint8_t single_flag;uint8_t long_flag;uint8_t key_time;
};
/*key define-------------------------------------------------------------------*/
#define B1_Port GPIOB
#define B2_Port GPIOB
#define B3_Port GPIOB
#define B4_Port GPIOA#define B1_Pin GPIO_PIN_0
#define B2_Pin GPIO_PIN_1
#define B3_Pin GPIO_PIN_2
#define B4_Pin GPIO_PIN_0#define Long_time 200 //2s
#define Short_time 50 //0.5s//led
void led_set(uint8_t led_dis);void led_2_toggle(void);
//key_control
void key_control(void);
void dispaly_init(void);
void menu_display(void);
void fre_2hz_duty_10_set(void);#ifdef __cplusplus
}
#endif
#endif
四、串口中断接收
本题目要求接收7个ASCII码字符 定义uint8_t 类型接收数组
uint8_t recevie[7];
在while(1)前开启串口接收中断函数接收7个字符后进入中断服务函数
HAL_UART_Receive_IT(huart1,recevie,7); 根据中断类型调用中断回调函数
下面展示中断服务函数
//串口接收完成中断回调服务函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{if(huart-Instance USART1){led_set(0xaa);if(((recevie[0]-0)*100(recevie[1]-0)*10(recevie[2]-0) password)(recevie[3]) -){password (recevie[4]-0)*100(recevie[5]-0)*10(recevie[6]-0);}HAL_UART_Receive_IT(huart1,recevie,7);}
}
五、LED灯闪烁问题
计时应该是正确的5s if(htim-Instance TIM7){static uint16_t time 0;if(password_valid 1){password_err_3 0;led_set(0x01);F 2000;fre_2hz_duty_10_set();if(time 50-1){password_valid 0;led_set(0x00);time 0;menu MENU_PSD;B1 ;B2 ;B3 ;}else{time ;}}else if(password_err_3 1){static uint8_t cnt 0;cnt ;cnt % 2;//led2翻转if(cnt 0){led_set(0x02);}else{led_set(0x00);}//5s后接触报警if(time 50-1){password_err_3 0;led_set(0x00);time 0; //5s计时清零cnt 0;}else{time ; //计时}F 1000;fre_1hz_duty_50_set();//方波1hz}else{time 0;fre_1hz_duty_50_set();//方波1hz} }
六、 总结
本次只写一个usr.c usr.h发现确实方便了许多相较于14届难度较小
比照LCD的cubemx配置引脚的时候记得配置PD2led锁存器引脚
复制其他.h时后记得更改预编译
#ifndef __USR_H__ //记得更改
#define __USR_H__#ifdef __cplusplus
extern C {
#endif/* Includes ------------------------------------------------------------------*/
#include main.h#ifdef __cplusplus
}
#endif
#endif
如果没有改为__USR_H__,跳转函数跳转不进去usr.c文件会显示C99_warning
