Diff: BME280/BME280.hpp

Revision:

0:80c7778c82b8

Child:

3:30d9b8d9adc9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BME280/BME280.hpp	Tue Oct 31 18:41:30 2017 +0800
@@ -0,0 +1,74 @@
+#include "mbed.h"
+
+#ifndef BME280_HPP
+#define BME280_HPP
+
+#define BME280_size 14
+
+Serial sensor(PA_11,PA_12);
+Serial pc(USBTX,USBRX);
+int AT[3] = {0xA5,0x52,0xF7};
+class BME280{
+public:
+    void judgement_data(char buf[]);
+    int Temp_read();
+
+private:
+    void receive();
+    void send_AT();
+    char buf[BME280_size];
+    int Lux,Temp,Preesure,Hum,Height;
+
+};
+void BME280::judgement_data(char buf[]){
+    int i=0;
+    if(buf[i++]== 0x5A){
+        //pc.printf("first_step\n");
+        if(buf[i++]== 0x5A){
+            //pc.printf("second_step\n");
+           //i++;//go to data type
+            if(buf[i] == 0x15){
+                //pc.printf("Lux type\n");
+                i++;//04
+                Lux = ((buf[i+1]<<24) | (buf[i+2]<<16) | (buf[i+3]<<8) | buf[i+4])/100;
+                //Lux = (0x00<<24) | (0x00<<16) | (0xFE<<8) | 0x40;//test
+                //pc.printf("Lux = %d\n", Lux);
+            }else if(buf[i] == 0x45){
+                //pc.printf("temp type\n");
+                i++;//0A
+                Temp = ((buf[i+1]<<8)|(buf[i+2]))/100;
+                Preesure = ((buf[i+3]<<24)|(buf[i+4]<<16)|(buf[i+5]<<8)|(buf[i+6]))/100;
+                Hum = ((buf[i+7]<<8)|(buf[i+8]))/100;
+                Height = ((buf[i+9]<<8)|(buf[i+10]));
+                //pc.printf("Temp = %d\n", Temp);
+                //pc.printf("Preesure = %d\n", Preesure);
+                //pc.printf("Hum = %d\n", Hum);
+                //pc.printf("Height = %d\n", Height);
+            }
+        }
+    }
+}
+void BME280::receive(){
+    for(int i=0;i<BME280_size;i++){
+        buf[i] = sensor.getc();  
+        //pc.putc(buf[i]);
+    }
+    
+}
+void BME280::send_AT(){
+    for(int i=0;i<3;i++){
+        sensor.putc(AT[i]);
+        //pc.putc(AT[i]);
+    }
+}
+int BME280::Temp_read(){
+    send_AT();
+    //wait(0.2);
+    receive();
+    //wait(0.2);
+    judgement_data(this->buf);
+    
+    return Temp;
+}
+
+#endif