/*! * \file main.c * \author Patrick Taling * \date 31/03/2017 * \version 1.0 * * \brief * Simple I2C SHT2x library to measure relative humidity and temperature and write it to an I2C LCD with the ATxmega256a3u. * Rights are owned by the original authors (Atmel, w.e.dolman, Noel200 (Elektroda) and Sensirion) * The user is responsible for any damage on any devices * * \Hardware * # 1602 I2c HD44780 LCD from HobbyElectronica https://www.hobbyelectronica.nl/product/1602-lcd-i2c-blauw-backlight/ * # HvA Xmega-bord (ATxmega256a3u with programmer/ USB-RS232-interface ATxmega32a4u) * # 3.3V - 5V levelshifter with two BS170 N-channel MOSFET * # Humidity/ temperature sensor module (EBM016) https://www.elektor.nl/humidity-sensor-module-ebm016 * * \development * # Atmel Studio 7 (version: 7.0.118) * # OS Version: Microsoft Windows NT 6.2.9200.0 (Platform: Win32NT) * # Atmel Gallary (7.8) * * \details * #The file main.c is the main to write text to a I2C lcd (PCF8574T adress 0x27) with the ATxmega256a3u. * #For the use of the main code you need the i2c library from w.e.dolman (w.e.dolman@hva.nl) * #For i2c.c use code 21.8 from "de taal C en de Xmega tweede druk" http://dolman-wim.nl/xmega/book/index.php * #For i2c.h use code 21.9 from "de taal C en de Xmega tweede druk" http://dolman-wim.nl/xmega/book/index.php * * #The main code needs some parts of the i2c_lcd library from Noel200 from http://www.elektroda.pl/rtvforum/topic2756081.html. * #The library can be downloaded from: http://www.elektroda.pl/rtvforum/login.php?redirect=download.php&id=670533. * #Go to LCD_PCF8574T/lcd_pcf/ and use i2c_lcd.c and i2c_lcd.h from the pakkage * * #The libraby needs some parts of the the SHT2x library from SENIRION from https://www.sensirion.com/en/products/humidity-sensors/humidity-temperature-sensor-sht2x-digital-i2c-accurate/ * #The libraby can be download from: https://www.sensirion.com/en/products/all-documents-of-sensirions-humidity-sensors-for-download/ * # Go to SHT2x/ Sample Code SHT21 and download the zip file Sensirion_Humidity_Sensors_SHT21_Sample_Code_C-file * \note the following files aren't fully used. Most parts are used in other .c of .h files or disabled. * DisplayDip204.C, DisplayDip204.h, * I2C_HAL.c, I2C_HAL.h, * System.c, System.h and * io70f3740.h. * \note for the use of two SHT2X you should use different IOs for SDA or additional hardware such as I2C multiplexer. * The adress of the SHT2x can’t be changed. * * * # All libraries are included in the folder i2c_SHT2x. * # For i2c.c and i2c.h use folder i2c_Dolman * # For i2c_lcd.c and i2c_lcd.h use folder i2c_lcd_Elektroda. * # For I2C_SHT2x.c, I2C_SHT2x.h and Typedefs.h use folder i2c_SHT2x_Sensirion. * * \verbatim * #include * #include * #include \endverbatim * \par * * \note An AVR-project can use multiple I2C's. One shoud take care that * in different source files there are no multiple i2c_init * definitions for the same I2C. */