add driver stub for Sensirion SEN5x PM sensor (71e891f2) · Commits · derf / multipass

Makefile

+4 −0

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		@@ -114,6 +114,10 @@ ifdef CONFIG_driver_scd4x
		CXX_TARGETS += src/driver/scd4x.cc
		endif

		ifdef CONFIG_driver_sen5x
		CXX_TARGETS += src/driver/sen5x.cc
		endif

		ifdef CONFIG_driver_veml6075
		CXX_TARGETS += src/driver/veml6075.cc
		endif

include/driver/sen5x.h

0 → 100644

+81 −0

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		/*
		* Copyright 2021 Daniel Friesel
		*
		* SPDX-License-Identifier: BSD-2-Clause
		*/
		#ifndef SEN5x_H
		#define SEN5x_H

		class SEN5x {
		private:
		SEN5x(const SEN5x &copy);
		unsigned char const address = 0x69;
		unsigned char txbuf[2];
		unsigned char rxbuf[24];

		public:
		SEN5x() {}

		unsigned short const PM_INVALID = 0xffff;
		signed short const TEMPERATURE_INVALID = 0x7fff;
		signed short const HUMIDITY_INVALID = 0x7fff;
		signed short const VOC_INVALID = 0x7fff;
		signed short const NOX_INVALID = 0x7fff;

		/*
		* PM1.0 value, scaled by 10.
		* PM1.0 [µg/m³] = pm10 / 10
		*/
		unsigned short pm1;

		/*
		* PM2.5 value, scaled by 10.
		* PM2.5 [µg/m3] = pm2_5 / 10
		*/
		unsigned short pm2_5;

		/*
		* PM4.0 value, scaled by 10.
		* PM4.0 [µg/m3] = pm4 / 10
		*/
		unsigned short pm4;

		/*
		* PM10 value, scaled by 10.
		* PM10 [µg/m3] = pm10 / 10
		*/
		unsigned short pm10;

		/*
		* Temperature, scaled by 200.
		* Temperature [°c] = temperature / 200
		*/
		signed short temperature;

		/*
		* Relative Humidity, scaled by 100.
		* Relative Humidity [%] = humidity / 100
		*/
		signed short humidity;

		/*
		* VOC Index, scaled by 10.
		* VOC index = voc / 10
		*/
		signed short voc;

		/*
		* NOx Index, scaled by 10.
		* NOx index = nox / 10
		*/
		signed short nox;

		void start();
		void stop();

		bool read();
		};

		extern SEN5x sen5x;

		#endif

src/app/datalogger/main.cc

+39 −0

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		@@ -54,6 +54,9 @@
		#ifdef CONFIG_driver_scd4x
		#include "driver/scd4x.h"
		#endif
		#ifdef CONFIG_driver_sen5x
		#include "driver/sen5x.h"
		#endif
		#ifdef CONFIG_driver_veml6075
		#include "driver/veml6075.h"
		#endif
		@@ -202,6 +205,38 @@ void loop(void)
		}
		#endif

		#ifdef CONFIG_driver_sen5x
		if (sen5x.read()) {
		kout << dec;
		if (sen5x.pm1 != sen5x.PM_INVALID) {
		kout << "PM1.0: " << (sen5x.pm1 / 10) << "." << (sen5x.pm1 % 10) << " µg/m³" << endl;
		}
		if (sen5x.pm2_5 != sen5x.PM_INVALID) {
		kout << "PM2.5: " << (sen5x.pm2_5 / 10) << "." << (sen5x.pm2_5 % 10) << " µg/m³" << endl;
		}
		if (sen5x.pm4 != sen5x.PM_INVALID) {
		kout << "PM4.0: " << (sen5x.pm4 / 10) << "." << (sen5x.pm4 % 10) << " µg/m³" << endl;
		}
		if (sen5x.pm10 != sen5x.PM_INVALID) {
		kout << "PM10 : " << (sen5x.pm10 / 10) << "." << (sen5x.pm10 % 10) << " µg/m³" << endl;
		}
		if (sen5x.humidity != sen5x.HUMIDITY_INVALID) {
		kout << "Humidity: " << (sen5x.humidity / 100) << "." << ((sen5x.humidity % 100) / 10) << " %" << endl;
		}
		if (sen5x.temperature != sen5x.TEMPERATURE_INVALID) {
		kout << "Temperature: " << (sen5x.temperature / 200) << "." << ((sen5x.temperature % 200) / 20) << " °c" << endl;
		}
		if (sen5x.voc != sen5x.VOC_INVALID) {
		kout << "VOC index: " << (sen5x.voc / 10) << "." << (sen5x.voc % 10) << endl;
		}
		if (sen5x.nox != sen5x.NOX_INVALID) {
		kout << "NOx index: " << (sen5x.nox / 10) << "." << (sen5x.nox % 10) << endl;
		}
		} else {
		kout << "SEN5x error" << endl;
		}
		#endif

		#ifdef CONFIG_driver_veml6075
		float uva, uvb;
		if (veml6075.readUV(&uva, &uvb)) {
		@@ -318,6 +353,10 @@ int main(void)
		scd4x.start();
		#endif

		#ifdef CONFIG_driver_sen5x
		sen5x.start();
		#endif

		#ifdef CONFIG_driver_veml6075
		veml6075.init();
		#endif

src/driver/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -119,6 +119,10 @@ config driver_scd4x
		bool "Sensirion SCD4x CO2 Sensor"
		depends on meta_driver_i2c

		config driver_sen5x
		bool "Sensirion SEN5x PM Sensor"
		depends on meta_driver_i2c

		config driver_veml6075
		bool "VEML6075 UV Sensor"
		depends on meta_driver_i2c

src/driver/sen5x.cc

0 → 100644

+51 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2021 Daniel Friesel
		*
		* SPDX-License-Identifier: BSD-2-Clause
		*/
		#include "arch.h"
		#include "driver/sen5x.h"
		#if defined(CONFIG_meta_driver_hardware_i2c)
		#include "driver/i2c.h"
		#elif defined(CONFIG_driver_softi2c)
		#include "driver/soft_i2c.h"
		#endif

		void SEN5x::start()
		{
		txbuf[0] = 0x00;
		txbuf[1] = 0x21;
		i2c.xmit(address, 2, txbuf, 0, rxbuf);
		}

		void SEN5x::stop()
		{
		txbuf[0] = 0x01;
		txbuf[1] = 0x04;
		i2c.xmit(address, 2, txbuf, 0, rxbuf);
		}

		bool SEN5x::read()
		{
		txbuf[0] = 0x03;
		txbuf[1] = 0xc4;

		if (i2c.xmit(address, 2, txbuf, 0, rxbuf)) {
		return false;
		}
		arch.delay_ms(20);
		if (i2c.xmit(address, 0, txbuf, 24, rxbuf)) {
		return false;
		}
		pm1 = (rxbuf[0] << 8) + rxbuf[1];
		pm2_5 = (rxbuf[3] << 8) + rxbuf[4];
		pm4 = (rxbuf[6] << 8) + rxbuf[7];
		pm10 = (rxbuf[9] << 8) + rxbuf[10];
		humidity = (rxbuf[12] << 8) + rxbuf[13];
		temperature = (rxbuf[15] << 8) + rxbuf[16];
		voc = (rxbuf[18] << 8) + rxbuf[19];
		nox = (rxbuf[21] << 8) + rxbuf[22];
		return true;
		}

		SEN5x sen5x;

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