射频解码程序如下，经过检验，稳定可靠，完成产品级别的交付。
- // MM32射频解码
- uint8_t RF;
- uint8_t HW,LW; //高低电平宽度
- uint8_t Code_x; //接受到第几位编码
- uint8_t FRemote1,FRemote2,FRemote3,FRemote4; //第一次接收到遥控编码，这四个依次从高到低存放遥控码的32位
- uint8_t Encode1,Encode2,Encode3,Encode4; //解码寄存器
- uint8_t SRemote1,SRemote2,SRemote3,SRemote4; //第二次接收到遥控编码
- uint8_t rf_ok1,rf_ok2,rf_ok; //解码过程中的临时接收成功标志，接收到一个完整的遥控命令后置1，通知解码程序可以解码了
- uint8_t old_level; //保存上一次查询到的电平状态
- uint8_t Syn; //接收到同步码时置1
- uint8_t Decode_ok; //判断按键结束，规定时间内未接收到同步码时置1
- uint16_t s; //二次接收的规定时间
- uint16_t time;
- uint8_t rf_data[4]; //接受码存放
- uint8_t Code_check=1; //对码标志
- uint8_t num_y=0; //长按YELLOW计数
- uint8_t num_w=0; //长按WHITE计数
- uint8_t num_o=0; //长按OFF计数
- void TIM2_IRQHandler(void)
- {
-
- if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
- {
-
- TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
- RF = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_5);
- if (!RF)
- {
- LW++;
-
- old_level=0;
- }
- else
- {
- HW++;
- if (!old_level) //检测电平从低到高的跳变，已检测到一个（高-低）完整电平周期
-
- {
- if (((HW>=3)&&(HW<=5))&&((LW>=120)&&(LW<=130))) //同步码
- {
-
- Syn = 1 ;
- time=640;
- Decode_ok=0;
- Code_x = 0;
- FRemote1=0; FRemote2=0; FRemote3=0; FRemote4=0;
- }
- else if((Syn)&&((LW>=10)&&(LW<=14))) //判0
- {
- Code_x++;
- if(Code_x>31)
- {
- if(!rf_ok1) //rf_ok1临时接收成功
- { //将接收到的编码复制到解码寄存器中
- Encode1=FRemote1;
- Encode2=FRemote2;
- Encode3=FRemote3;
- Encode4=FRemote4;
-
- rf_ok1=1; //通知解码子程序可以解码
- Syn=0;
- s=1000;
-
- }
- else
- { //将接收到的编码复制到解码寄存器中
- SRemote1=FRemote1;
- SRemote2=FRemote2;
- SRemote3=FRemote3;
- SRemote4=FRemote4;
-
- rf_ok2=1; //通知解码子程序可以解码
- Syn=0;
- }
- }
- }
- else if ((Syn)&&((LW>=2)&&(LW<=6))) //判1
- {
- switch (Code_x)
- {
- case 0 : { FRemote1=FRemote1 | 0x80; break; }
- case 1 : { FRemote1=FRemote1 | 0x40; break; }
- case 2 : { FRemote1=FRemote1 | 0x20; break; }
- case 3 : { FRemote1=FRemote1 | 0x10; break; }
- case 4 : { FRemote1=FRemote1 | 0x08; break; }
- case 5 : { FRemote1=FRemote1 | 0x04; break; }
- case 6 : { FRemote1=FRemote1 | 0x02; break; }
- case 7 : { FRemote1=FRemote1 | 0x01; break; }
- case 8 : { FRemote2=FRemote2 | 0x80; break; }
- case 9 : { FRemote2=FRemote2 | 0x40; break; }
- case 10: { FRemote2=FRemote2 | 0x20; break; }
- case 11: { FRemote2=FRemote2 | 0x10; break; }
- case 12: { FRemote2=FRemote2 | 0x08; break; }
- case 13: { FRemote2=FRemote2 | 0x04; break; }
- case 14: { FRemote2=FRemote2 | 0x02; break; }
- case 15: { FRemote2=FRemote2 | 0x01; break; }
- case 16: { FRemote3=FRemote3 | 0x80; break; }
- case 17: { FRemote3=FRemote3 | 0x40; break; }
- case 18: { FRemote3=FRemote3 | 0x20; break; }
- case 19: { FRemote3=FRemote3 | 0x10; break; }
- case 20: { FRemote3=FRemote3 | 0x08; break; }
- case 21: { FRemote3=FRemote3 | 0x04; break; }
- case 22: { FRemote3=FRemote3 | 0x02; break; }
- case 23: { FRemote3=FRemote3 | 0x01; break; }
- case 24: { FRemote4=FRemote4 | 0x80; break; }
- case 25: { FRemote4=FRemote4 | 0x40; break; }
- case 26: { FRemote4=FRemote4 | 0x20; break; }
- case 27: { FRemote4=FRemote4 | 0x10; break; }
- case 28: { FRemote4=FRemote4 | 0x08; break; }
- case 29: { FRemote4=FRemote4 | 0x04; break; }
- case 30: { FRemote4=FRemote4 | 0x02; break; }
- case 31: { FRemote4=FRemote4 | 0x01;
- if(!rf_ok1)
- {
- Encode1=FRemote1;
- Encode2=FRemote2;
- Encode3=FRemote3;
- Encode4=FRemote4;
-
- rf_ok1=1;
- Syn=0;
- break;
- }
- else
- {
- SRemote1=FRemote1;
- SRemote2=FRemote2;
- SRemote3=FRemote3;
- SRemote4=FRemote4;
-
- rf_ok2=1;
- Syn=0;
- break;
- }
- }
- }
- Code_x++;
- }
- else
- {
-
- Code_x=0; Syn=0;FRemote1=0;FRemote2=0;
- FRemote3=0; HW=1;LW=0;Decode_ok=1;
-
- }
- LW=0;HW=1;
- }
- old_level=1;
- }
-
- if(Decode_ok)
- {
-
- if(rf_ok1) //规定时间内接收到两帧相同的数据才有效
- {
- s--;
-
- if(!s) rf_ok1=0;
-
- if(rf_ok2)
- {
- if((Encode1==SRemote1)&&(Encode2==SRemote2)&&(Encode3==SRemote3))
- {
- rf_ok=1;
- rf_ok1=0;
- rf_ok2=0;
- time=200;
- }
- else
- {
- rf_ok=0;
- rf_ok1=0;
- rf_ok2=0;
- }
- }
- }
-
- if(rf_ok) //判断是否接收成功
- {
-
- TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
- rf_ok=0;
- rf_data[0]=Encode1;
- rf_data[1]=Encode2;
- rf_data[2]=Encode3;
- rf_data[3]=Encode4;
-
- /*YELLOW 接收*/
- if((rf_data[2]&0x05)==0x05)
-
- {num_y++;num_w=0;num_o=0;}
-
- /*OFF 接收*/
- else if((rf_data[2]&0x01)==0x01)
-
- {num_o++;num_y=0;num_w=0;}
-
- /*WHITE 接收*/
- else if((rf_data[2]&0x06)==0x06)
-
- {num_w++;num_o=0;num_y=0;}
-
- /*其余键接收*/
- else
-
- {num_y=0;num_w=0;num_o=0;}
-
- /*产测*/
- if(((rf_data[2]&0x01)==0x01)&&(num_o>=20)&&(Code_check==0))
- {
- mcu_start_wifitest();
- }
- /*配网*/
- if(((rf_data[2]&0x06)==0x06)&&(num_w>=20)&&(Code_check==0))
- {
- //mcu_set_wifi_mode(SMART_CONFIG);
- mcu_reset_wifi();
- }
-
- /*对码*/
- if(((rf_data[2]&0x05)==0x05)&&(num_y>=5)&&(Code_check==1))
- {
- REMOTE_ID1 = rf_data[0];
- REMOTE_ID2 = rf_data[1];
- REMOTE_ID3 = rf_data[2]&0xf0;
-
- Code_check = 0;
-
- Buzz_Ring(500);
-
- }
-
- else //正常遥控过程
- {
- Remote_Scan(); //接收码校验
-
- OperationCode_Send();
-
- }
- TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
- }
- }
- }
- }
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