root: init sensors: humidity+temp, CO2. Pressure sensor is now static class

SDP600Sensor/src/PressureWrapper.cpp

@@ -0,0 +1,61 @@
+/*
+ * PressureWrapper.cpp
+ *
+ *  Created on: 5 Oct 2022
+ *      Author: evgenymeshcheryakov
+ */
+
+#include "PressureWrapper.h"
+#include <cstdio>
+
+static uint8_t crc8(uint8_t *data, size_t size) {
+	uint8_t crc = 0x00;
+	uint8_t byteCtr;
+	//calculates 8-Bit checksum with given polynomial
+	for (byteCtr = 0; byteCtr < size; ++byteCtr) {
+		crc ^= (data[byteCtr]);
+		for (uint8_t bit = 8; bit > 0; --bit) {
+			if (crc & 0x80) crc = (crc << 1) ^ 0x131; //P(x)=x^8+x^5+x^4+1 = 0001 0011 0001
+			else crc = (crc << 1);
+		}
+	}
+	return crc;
+}
+
+PressureWrapper::PressureWrapper ()
+{
+	NVIC_DisableIRQ(I2C0_IRQn);
+	I2C_config config;
+	I2C i2c_c(config);
+	i2c = &i2c_c;
+}
+
+PressureWrapper::~PressureWrapper ()
+{
+  // TODO Auto-generated destructor stub
+}
+
+int PressureWrapper::getPressure() {
+	int16_t pressure = 0;
+	if(!getRawPressure ()) {
+		unsigned int i = 0;
+		while(i<7200) i++;
+		getRawPressure ();
+		i = 0;
+	}
+	if(crc8(data.rBuffer, 2) == data.crc){
+		pressure = data.rBuffer[0];
+		pressure = pressure << 8;
+		pressure |= data.rBuffer[1];
+		float result = (float) pressure * 0.95 / 240;
+		return (int) result;
+	}
+	return -255;
+}
+
+bool PressureWrapper::getRawPressure () {
+	uint8_t getMeasurementComm = 0xF1;
+	return (i2c->transaction(ADDRESS, &getMeasurementComm, 1, data.rBuffer, 3));
+}
+
+