small changes and many new sensors

2023-10-30 14:30:02 +01:00
parent 07917fe5ba
commit aad07c1b0a
21 changed files with 1642 additions and 297 deletions
--- a/ext/sens/HTU2x.h
+++ b/ext/sens/HTU2x.h
@@ -0,0 +1,101 @@
+ 
+ 
+#pragma once
+
+/**
+ * humidity and temperature sensor
+ * https://www.ttieurope.com/content/dam/tti-europe/manufacturers/te-connectivity/resources/ENG_DS_HPC199_6_A6.pdf 
+ * 
+ * this sensor seems to be a bit stubborn.. requiring active polling until it is finished
+ * just waiting some time does not seem to work
+ * 
+ */
+template <typename I2C> class HTU2x {
+	
+private:
+
+	I2C& i2c;
+	static constexpr const uint8_t ADDR = 0x40;
+	static constexpr const char* NAME = "HTU2x";
+	
+	static constexpr const uint8_t CMD_QUERY_TEMP = 0xF3;
+	static constexpr const uint8_t CMD_QUERY_HUMI = 0xF5;
+	static constexpr const uint8_t CMD_READ_USER_REG = 0xE7;
+	static constexpr const uint8_t CMD_SOFT_RESET = 0xFE;
+
+	
+
+public:
+
+	HTU2x(I2C& i2c) : i2c(i2c) {
+		
+	}
+			
+	/** is the device present on the bus? */
+	bool isPresent() {
+		return i2c.query(ADDR);
+	}
+			
+	struct Result {
+		float temp;
+		float humi;
+		float humiComp;
+	};
+				
+	/** trigger a single measurement */	
+	Result singleMeasure() {
+		
+		uint8_t tmp[3];	// 2 bytes + checksum
+		Result res;
+		
+		sendCMD(CMD_QUERY_TEMP);
+		if (waitForStart()) {
+			i2c.readBytes(tmp, 3);
+			i2c.stop();
+			uint16_t t = ((tmp[0]<<8)|(tmp[1]<<0)) & 0xFFFC;
+			//printf("a: %d\n", t);
+			res.temp = -46.85f + 175.72 * t / float(1<<16);
+		}
+		
+		sendCMD(CMD_QUERY_HUMI);
+		if (waitForStart()) {
+			i2c.readBytes(tmp, 3);
+			i2c.stop();
+			uint16_t h = ((tmp[0]<<8)|(tmp[1]<<0)) & 0xFFFC;
+			//printf("b: %d\n", h);
+			res.humi = -6 + 125 * h / float(1<<16);
+			res.humiComp = res.humi + (-0.15 * (25 - res.temp));
+		}
+		
+		return res;
+		
+	}
+	
+private:
+	
+	bool waitForStart() {
+		for (int i = 0; i < 1024; ++i) {
+			if (i2c.startRead(ADDR)) {return true;}
+		}
+		return false;
+	}
+	
+	void sendCMD(uint8_t cmd) {
+		i2c.writeRaw(ADDR, 1, &cmd);
+	}
+	
+	void readUserRegister() {
+		
+		i2c.writeRaw(ADDR, 1, &CMD_SOFT_RESET);
+		
+		vTaskDelay(100 / portTICK_PERIOD_MS);
+		
+		uint8_t val = 0xaa;
+		i2c.readReg(ADDR, CMD_READ_USER_REG, 1, &val);
+		
+		printf("user: %d\n", val);
+		
+	}
+		
+	
+};