Diff: sensor.h

Revision:

0:740c1eb2df13

Child:

1:e34100dd6532

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sensor.h	Thu Jun 23 11:16:14 2016 +0000
@@ -0,0 +1,132 @@
+#include "MicroduinoPinNames.h"
+#include "Config.h"
+#include "AM2321.h"
+
+extern Serial pc;
+extern Timer g_MainTimer;
+#define INTERVAL_pm25    200
+
+//SoftwareSerial pmSerial(4,5);   //PM2.5传感器通讯软串口
+#ifdef OPEN_PM25
+Serial pmSerial(D5, D4); //tx,rx
+#endif
+AnalogIn gLight(A0);
+AnalogIn gCH4(A2);
+AM2321 am2321;
+
+float sensor_tem,sensor_hum,sensor_light,Sensor_etoh;
+
+float sensorPM25 = 0.6;
+
+long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+#ifdef OPEN_PM25
+void PM25_init(void)
+{
+    //pc.printf("Enter PM25_init\r\n");
+    pmSerial.baud(2400);
+}
+
+// 读取PM2.5传感器
+void PM25()
+{
+    //pc.printf("Enter PM25()\r\n");
+    int data_s = 0;    //串口接收数据
+    int num = -1;      //串口接收数据计数
+    int sum = 0;       //校验和
+    int cal[6];        //接收数据缓存
+    float dustDensity = 0;  //PM2.5浓度
+
+    //pmSerial.begin(2400);   //首先启动软串口
+    //pmSerial.baud(2400);
+    //pmSerial.flush();       //清空串口缓存
+
+    uint32_t start = g_MainTimer.read_ms();
+    while(true) {//避免无限循环
+        uint32_t nowTime = g_MainTimer.read_ms();
+        if (nowTime - start > 100) {
+            break;
+        }
+        //pc.printf("PM25:while(1)\r\n");
+        //if(pmSerial.available() > 0) { //串口缓存有数据
+        if (pmSerial.readable() > 0) {
+        //if ((data_s = pmSerial.getc()) != 0) {
+            //myled = 0;
+            //pc.printf("readable() > 0\r\n");
+            //data_s = pmSerial.read();   //读取串口缓存数据
+            data_s = pmSerial.getc();
+            if(data_s == 0xAA) {         //得到数据帧起始位
+                num = 0;                  //开始计数
+            } else if(num >= 0) {
+                num++;                //读到数据，计数+1
+                cal[num-1] = data_s;  //数据保存到缓存中
+                if(num == 6) {         //读到数据帧最后一位
+                    sum = cal[0] + cal[1] + cal[2] + cal[3];  //计算校验和
+                    if(sum == cal[4] && cal[5] == 0xFF) {     //校验和匹配，数据帧最后一位为0xFF，说明接收的数据帧正常
+                        dustDensity = (cal[0]*256 + cal[1])*(5.0/1024)*550;   //计算PM2.5浓度，单位ug/m3
+                    } else {   //接收的数据不正常
+                        dustDensity = 0;    //浓度清零
+                    }
+                    break;
+                }
+            }
+        }
+    }
+    //pmSerial.end();     //关闭软串口
+    //return dustDensity; //返回值
+    sensorPM25 = dustDensity;
+    //pc.printf("sensorPM25 = %f\r\n", sensorPM25);
+}
+#endif
+
+#if 0
+// 读取光照传感器
+void updateLight()
+{
+    //sensor_light = map(analogRead(A0), 0, 1023, 0, 255);
+    //float lvf = gLight;
+    int lt = (int)(gLight.read()*1024.0);
+    
+    //pc.printf("light = %d, lvf = %f\r\n", lt, lvf);
+    sensor_light = map(lt, 0, 1024, 0, 255);// 这里和Arduino不一样，不知道为什么
+    
+}
+#else
+void updateLight(void)
+{
+    uint16_t lt = gLight.read_u16();
+    lt = lt & 0x03FF;
+    sensor_light = map(lt, 0, 1023, 0, 255);
+    //pc.printf("sensor_light=%f\r\n", sensor_light);
+    sensorPM25 += 1.0;
+}
+#endif
+
+// 读取甲醛传感器
+void updateCH4()
+{
+    //Sensor_etoh = map(analogRead(A2), 0, 1023, 0, 30);
+    uint16_t ch4 = gCH4.read_u16();
+    ch4 = ch4 & 0x03FF;
+    Sensor_etoh = map(ch4, 0, 1023, 0, 30);
+    //pc.printf("CH4 = %d\r\n", ch4);
+}
+
+// 读取温湿度传感器
+void updateTempHumi(void)
+{
+    static uint32_t lstTime = 0;
+    uint32_t nowTime = g_MainTimer.read_ms();
+    pc.printf("Enter updateTempHumi(), lstTime:%ums, nowTime:%u, cha:%u\r\n", lstTime, nowTime, nowTime - lstTime);
+    if (nowTime - lstTime < 2000) {
+        return;
+    }
+    am2321.read();
+    sensor_tem = am2321.temperature / 10.0;
+    sensor_hum = am2321.humidity / 10.0;
+    //pc.printf("%u:temp = %.1f, hum = %.1f\r\n",cot, sensor_tem, sensor_hum);
+    lstTime = g_MainTimer.read_ms();
+}