五、中断处理

void SysTick_Handler(void)
{TimingDelay_Decrement();
}void ESP8266_USART_INT_FUN(void)
{uint8_t ucCh;if ( USART_GetITStatus (ESP8266_USARTx, USART_IT_RXNE ) != RESET ){ucCh  = USART_ReceiveData(ESP8266_USARTx );if ( strEsp8266_Fram_Record .InfBit .FramLength < ( RX_BUF_MAX_LEN - 1 ) )                       //预留1个字节写结束符strEsp8266_Fram_Record .Data_RX_BUF [ strEsp8266_Fram_Record .InfBit .FramLength ++ ]  = ucCh;}if ( USART_GetITStatus(ESP8266_USARTx, USART_IT_IDLE ) == SET )                                         //数据帧接收完毕{strEsp8266_Fram_Record .InfBit .FramFinishFlag = 1;ucCh = USART_ReceiveData(ESP8266_USARTx );ucTcpClosedFlag = strstr(strEsp8266_Fram_Record .Data_RX_BUF, "CLOSED\r\n" ) ? 1 : 0;}
}void ADC_IRQHandler_FUN(void)
{if(ADC_GetITStatus(ADCx,ADC_IT_EOC)!=RESET){ADC_ClearITPendingBit(ADCx,ADC_IT_EOC);/* 读取ADC的转换值 */ADC_ConvertedValue = ADC_GetConversionValue(ADCx);}
}

主要就是3个ESP8266的通信中断，定时器中断和ADC采集中断

六、主体框架

对采集数据的初始化

 for(i=0;i<n_ir_buffer_length;i++){while(MAX30102_INT==1);   //wait until the interrupt pin assertsmax30102_FIFO_ReadBytes(REG_FIFO_DATA,temp);aun_red_buffer[i] =  (long)((long)((long)temp[0]&0x03)<<16) | (long)temp[1]<<8 | (long)temp[2];    // Combine values to get the actual numberaun_ir_buffer[i] = (long)((long)((long)temp[3] & 0x03)<<16) |(long)temp[4]<<8 | (long)temp[5];   // Combine values to get the actual numberif(un_min>aun_red_buffer[i])un_min=aun_red_buffer[i];    //update signal minif(un_max<aun_red_buffer[i])un_max=aun_red_buffer[i];    //update signal max}un_prev_data=aun_red_buffer[i];//calculate heart rate and SpO2 after first 500 samples (first 5 seconds of samples)maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid);

		//dumping the first 100 sets of samples in the memory and shift the last 400 sets of samples to the topfor(i=100;i<500;i++){aun_red_buffer[i-100]=aun_red_buffer[i];aun_ir_buffer[i-100]=aun_ir_buffer[i];//update the signal min and maxif(un_min>aun_red_buffer[i])un_min=aun_red_buffer[i];if(un_max<aun_red_buffer[i])un_max=aun_red_buffer[i];}//take 100 sets of samples before calculating the heart rate.for(i=400;i<500;i++){un_prev_data=aun_red_buffer[i-1];while(MAX30102_INT==1);max30102_FIFO_ReadBytes(REG_FIFO_DATA,temp);aun_red_buffer[i] =  (long)((long)((long)temp[0]&0x03)<<16) | (long)temp[1]<<8 | (long)temp[2];    // Combine values to get the actual numberaun_ir_buffer[i] = (long)((long)((long)temp[3] & 0x03)<<16) |(long)temp[4]<<8 | (long)temp[5];   // Combine values to get the actual numberif(aun_red_buffer[i]>un_prev_data){f_temp=aun_red_buffer[i]-un_prev_data;f_temp/=(un_max-un_min);f_temp*=MAX_BRIGHTNESS;n_brightness-=(int)f_temp;if(n_brightness<0)n_brightness=0;}else{f_temp=un_prev_data-aun_red_buffer[i];f_temp/=(un_max-un_min);f_temp*=MAX_BRIGHTNESS;n_brightness+=(int)f_temp;if(n_brightness>MAX_BRIGHTNESS)n_brightness=MAX_BRIGHTNESS;}//send samples and calculation result to terminal program through UARTif(ch_hr_valid == 1 && n_heart_rate<120)//**/ ch_hr_valid == 1 && ch_spo2_valid ==1 && n_heart_rate<120 && n_sp02<101{dis_hr = n_heart_rate;dis_spo2 = n_sp02;}else{dis_hr = 0;dis_spo2 = 0;}
//				printf("HR=%i, ", n_heart_rate); 
//				printf("HRvalid=%i, ", ch_hr_valid);
//				printf("SpO2=%i, ", n_sp02);
//				printf("SPO2Valid=%i\r\n", ch_spo2_valid);}maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid);

核心功能的实现

		if(order[0] == 1){show2(order[1],order[2],order[3],order[4]);Delay_ms(500);printf("可燃气体浓度  %f\r\n", Smog_GetPPM());if(order[1] == 1){LED1_ON;}else{LED1_OFF;}if(order[2] == 1){LED2_ON;}else{LED2_OFF;}if(order[3] == 1){LED3_ON;}else{LED3_OFF;}if(order[4] == 1){BEEP_StateSet(BEEPState_ON);}else{BEEP_StateSet(BEEPState_OFF);}			}else{sprintf(cStr,"%d+%d+%d+%d+%d+%d+%d",DHT11_Data.temp_int,DHT11_Data.humi_deci,DHT11_Data.temp_int,DHT11_Data.temp_deci,dis_hr,dis_spo2,m);ESP8266_SendString(ENABLE,cStr,0,Single_ID_0);  show((u8 *)temp_1,(u8 *)hum_2,(u8 *)s_3,(u8 *)o_4);if( DHT11_Data.temp_int > order[1] || DHT11_Data.temp_int < order[2] ){LED1_ON;LED2_OFF;LED3_OFF;BEEP_StateSet(BEEPState_ON);Delay_ms(1000);}else if( DHT11_Data.humi_int > order[3] || DHT11_Data.humi_int < order[4] ){LED2_ON;LED1_OFF;LED3_OFF;BEEP_StateSet(BEEPState_ON);Delay_ms(1000);}else if( dis_hr > order[6] || dis_hr < order[5]){if( dis_hr == 0){}else{LED1_ON;LED2_ON;LED3_OFF;BEEP_StateSet(BEEPState_ON);Delay_ms(1000);}}else if( dis_spo2 < order[7] || dis_spo2 > order[8]){if( dis_spo2 == 0){}else{LED2_ON;LED3_ON;LED1_OFF;BEEP_StateSet(BEEPState_ON);Delay_ms(1000);}}else if(m == 1){LED1_OFF;LED2_OFF;LED3_ON;BEEP_StateSet(BEEPState_ON);Delay_ms(1000);}else{LED1_OFF;LED2_OFF;LED3_OFF;BEEP_StateSet(BEEPState_OFF);	Delay_ms(1000);}LED1_OFF;LED2_OFF;LED3_OFF;BEEP_StateSet(BEEPState_OFF);}

我把服务器数据重新转换放到了数组中，再用一个大分支结构对其中的数据进行判别然后实现对应功能。

烟雾

读取电压值

float Smog_Get_Vol(void)
{u16 adc_value = 0;//这是从MQ-7传感器模块电压输出的ADC转换中获得的原始数字值，该值的范围为0到4095，将模拟电压表示为数字值float voltage = 0;//MQ-7传感器模块的电压输出，与一氧化碳的浓度成正比adc_value = ADC_ConvertedValue;//#define SMOG_ADC_CHX	ADC_Channel_4	定义烟雾传感器所在的ADC通道编号Delay_ms(5);voltage  = (3.3/4096.0)*(adc_value);return voltage;
}

/*********************
// 传感器校准函数，根据当前环境PPM值与测得的RS电压值，反推出R0值。
// 在空气中运行过后测出R0为26
float MQ7_PPM_Calibration()
{
   float RS = 0;
   float R0 = 0;
   RS = (3.3f - Smog_Get_Vol()) / Smog_Get_Vol() * RL;//RL   10 // RL阻值
   R0 = RS / pow(CAL_PPM / 98.322, 1 / -1.458f);//CAL_PPM 10 // 校准环境中PPM值
   return R0;
}
**********************/

// 计算Smog_ppm
float Smog_GetPPM()
{float RS = (3.3f - Smog_Get_Vol()) / Smog_Get_Vol() * RL;float ppm = 98.322f * pow(RS/R0, -1.458f);}

通信帧格式

接收帧格式

模式 1
1 LED1 LED2 LED3 BEEP
每个功能一位控制 1开 0关

模式2

0 两位数表示温度上限左高位右低位温度下限湿度上限湿度下限心率用一位表示 0 1 2 分别为小孩成年人老人输入其它数值表示是个人就行两位表示血氧下限左高右低
模式2接收一共12位

050108020490

发送帧格式
sprintf(cStr,"%d+%d+%d+%d+%d+%d+%d",DHT11_Data.temp_int,DHT11_Data.humi_deci,DHT11_Data.temp_int,DHT11_Data.temp_deci,dis_hr,dis_spo2,m);
温度整数+温度小数+湿度整数+湿度小数+心率+血氧饱和度+是否有可燃气体

wifi接收数据的处理

由于接收到的是字符串，所以剪掉字符0变成整数，传多位数据的时候乘10改变位置就行。

主要是确保数据不会出错。暂时没使用任何协议，算是自己指定了一个没有校验的简单协议吧。以后有机会改成MQTT格式或者MODBUS格式的协议。

u32* wifi_rec(void)
{u32 pCH;int i;ESP8266_ReceiveString(ENABLE);if ( strEsp8266_Fram_Record .InfBit .FramFinishFlag ){strEsp8266_Fram_Record .Data_RX_BUF [ strEsp8266_Fram_Record .InfBit .FramLength ]  = '\0';printf ( "\r\n%s\r\n", strEsp8266_Fram_Record .Data_RX_BUF );if(strEsp8266_Fram_Record .Data_RX_BUF[0] == '1'){for(i = 0; i < 12;i++){order[i] = strEsp8266_Fram_Record .Data_RX_BUF[i] - '0';}	}else{for(i = 0; i < 9;i++){if (i == 0)order[i] = strEsp8266_Fram_Record .Data_RX_BUF[i] - '0';else{if( i % 2 == 0){order[i/2] = (((strEsp8266_Fram_Record .Data_RX_BUF[i-1] - '0') * 10) + (strEsp8266_Fram_Record .Data_RX_BUF[i] - '0'));}}}//0 模式 1234 温湿度 56心率 78血氧//第九位 0 1 2 小孩 成年人 老人   80-140  60-100  55-75  switch(strEsp8266_Fram_Record .Data_RX_BUF[9]){case 0:order[5] = 80;order[6] = 140;break;case 1:order[5] = 60;order[6] = 100;break;case 2:order[5] = 55;order[6] = 75;break;default:order[5] = 40;order[6] = 160;break;}//血氧饱和度正常人 90 - 100order[7] = (((strEsp8266_Fram_Record .Data_RX_BUF[10] - '0') * 10) + (strEsp8266_Fram_Record .Data_RX_BUF[11] - '0'));printf("血氧下限 %d",order[7]);order[8] = 100;}/*将接收到的字符串转成整形数*/pCH=atoi(strEsp8266_Fram_Record .Data_RX_BUF);switch(pCH){case 0:break;case 1:break;case 2:break;}         }  return order;
}

OLED显示

void show(uint8_t *a,uint8_t *b, uint8_t *c, uint8_t *o)
{OLED_CLS();//清屏OLED_ShowCN(0,0,26);//温OLED_ShowCN(16,0,27);//度OLED_ShowCN(32,0,14);//：OLED_ShowStr(48,0,a,2);		//2表示8X16OLED_ShowCN(0,2,28);//湿OLED_ShowCN(16,2,27);//度OLED_ShowCN(32,2,14);//：OLED_ShowStr(48,2,b,2);		//2表示8X16OLED_ShowCN(0,4,29);//心OLED_ShowCN(16,4,30);//率OLED_ShowCN(32,4,14);//：OLED_ShowStr(48,4,c,2);		//2表示8X16OLED_ShowCN(0,6,37);//血OLED_ShowCN(16,6,38);//氧OLED_ShowCN(32,6,14);//：OLED_ShowStr(48,6,o,2);		//2表示8X16
}

上面是自主更新，下面是被控制模式，由于服务器童鞋没写远程改上下限功能，我的这部分也被注释掉了。真要用还得调试一下，毕竟没检验过。

void show2(u32 a,u32 b, u32 c, u32 o)
{OLED_CLS();//清屏OLED_ShowCN(0,0,41);//红OLED_ShowCN(16,0,44);//灯OLED_ShowCN(32,0,14);//：if(a  == 1){OLED_ShowCN(48,0,46);//开}else{OLED_ShowCN(48,0,47);//关}OLED_ShowCN(0,2,45);//绿OLED_ShowCN(16,2,44);//灯OLED_ShowCN(32,2,14);//：if(b  == 1){OLED_ShowCN(48,2,46);//开}else{OLED_ShowCN(48,2,47);//关}OLED_ShowCN(0,4,42);//黄OLED_ShowCN(16,4,44);//灯OLED_ShowCN(32,4,14);//：if(c  == 1){OLED_ShowCN(48,4,46);//开}else{OLED_ShowCN(48,4,47);//关}OLED_ShowStr(0,6,(u8*)"BEEP",2);OLED_ShowCN(32,6,14);//：if(o  == 1){OLED_ShowCN(48,6,46);//开}else{OLED_ShowCN(48,6,47);//关}
}