Si7013EVB-UDP-M3L1 User's Guide
Contents
1. SILICON LABS Si7013EVB UDP M3L1 Si7013EVB UDP M3L1 User s Guide 1 Introduction This user s guide describes the hardware and software included with the Si7013EVB UDP and S1 013EVB UDP MSL1 evaluation kits This user s guide is included in the evaluation kit The Si7013EB UDP port header card contains an Si7013 sensor The port header card plugs into a Unified Development Platform UDP SIM3L1xx 32 bit MCU card with Multiplexed LCD SiIM38L1xxLCD B Dk The Si7013EVB UDP M3L1 evaluation kit serves as a demonstration of the Si7013 Digital Humidity and Temperature Sensor combined with the SiIM3L1xx High Performance Low Power 32 Bit Precision32 MCU functioning as a battery operated temperature humidity data logger It includes the software running on the SiIM3L1xx MCU as well as a PC based application used to configure the data logger and retrieve the data In addition to being a demonstration of and an example design for a low power data logger this evaluation kit contains the hardware and software needed to begin the development of virtually any application designed around the Si7013 and SIM3L1xx The two main hardware components of Si7013EVB UDP M3L1 kit are m UDP SIM38L1XX LCD MCU Unified Development Platform UDP SIM3L1xx MCU card with multiplexed LCD E Si7013EB UDP port header card Note Si7013EB UDP refers to the board and Si7013EVB UDP refers to the kit The port header card contains an Si7013 sensor it plugs into the MCU2. This is done using the following procedure 1 Plug the Si7013 port header card onto J21 PBO of the MCU card The Silicon Labs logo on the port header card faces the power connector on the MCU card Make sure that the VIO pin on the port header card matches up with the VIO pin on J21 The top 4 pins 1 4 of the port header card do not connect with J21 Figure 5 Si7013 Port Header Card 6 Rev 0 2 SILICON LABS Si7013EVB UDP M3L1 2 Connect the USB Debug Adapter to a USB port on the PC and connect the USB Debug Adapter to the debug connector J14 on the MCU card 3 Connect the power supply to the MCU board J6 4 Verify that the switches on MCU card are set correctly Table 2 MCU Card Switch Settings Switch Label VBAT Sel 3 3 V_VREG center VIORF Sel VBAT down VIO Sel VBAT down 5 Open Windows Explorer and change to the project folder UDP_Software_vX X Demo SiM3L1 xx where vX X is the version number of the UDP software 6 Double click on the Install Si70xx bat file in the project folder This opens a command window and downloads the pre built image file UDP_Demo_Si70xx hex to the MCU card 7 Verify that Success No errors reported is displayed in the command window 8 Press any key to close the command window The demo software displays temperature and humidity on the LCD The LCD is updated twice a second with new temperature and humidity readings If you prefer the tempera
3. If logging is enabled a dot is displayed to the right of the number 4 7 2 2 2 5 Alarm Display When an alarm occurs the LCD displays a flashing alarm message as shown in Figure 26 Figure 26 Alarm Display An alarm message shows the offending temperature or humidity on the left and the word HI or LOW on the right The above alarm message indicates that there is high temperature alarm and that the high temperature is 35 0 C If both a temperature alarm and a humidity alarm occur at the same time the LCD alternates between the two alarm messages If the alarm message says COMM ERR then the Data Logger firmware has failed to communicate with the Si7005 port header card Please verify that the port header card is properly plugged into the MCU card 22 Rev 0 2 SILICON LABS i7013EVB UDP M3L1 4 7 2 2 3 Alarm Output Pin When a sample is taken that causes an alarm the Data Logger firmware pulses the output pin low The output pin may be used to signal an external device or to sound a buzzer The output pin is PBO 6 which is available on the analog connector J20 The output pin is normally 3 3 V but when an alarm occurs it goes to 0 V for 500 ms The Data Logger firmware configures the output pin for high drive strength so it can sink up to 80 mA Note A buzzer is not included with the evaluation kit If you purchase a buzzer make sure the buzzer works with 3 V and not 12 V Figure 27 Optional 3
4. V Buzzer User Supplied e a 8883 ES Rev 0 2 23 SILICON LABS 24 i7013EVB UDP M3L1 5 Additional Reference Resources Si7013 data sheet AN607 Si70xx Humidity Sensor Designers Guide Si7013USB Dongle users guide SiM3L1xx data sheet UDP SiM3L1xx LCD MCU Card User s Guide SIM3L1xx Reference Manual Rev 0 2 E SILICON LABS NOTES E SILICON LABS Rev 0 2 i7013EVB UDP M3L1 25 i7013EVB UDP M3L1 CONTACT INFORMATION Silicon Laboratories Inc 400 West Cesar Chavez Austin TX 78701 Tel 1 512 416 8500 Fax 1 512 416 9669 Toll Free 1 877 444 3032 Please visit the Silicon Labs Technical Support web page https www silabs com support pages contacttechnicalsupport aspx and register to submit a technical support request Patent Notice Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low power small size ana log intensive mixed signal solutions Silicon Labs extensive patent portfolio is a testament to our unique approach and world class engineering team The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice Silicon Laboratories assumes no responsibility for errors and omissions and disclaims responsibility for any consequences resulting from the use of information included herein Additionally Silicon Laboratories ass
5. button is connected to bit 5 of port bank 1 PB1 5 The MCU is configured to generate a port match interrupt when a button is pressed When the port match interrupt handler detects that a button has been pressed then the interrupt handler reconfigures the port match to detect when the button is released This prevents a large number of useless port match interrupts while the button is held down 4 5 LCD Driver The LCD driver contains routines for displaying characters strings and numbers on the LCD The LCD driver is implemented in the myLCDO c file The LCD driver provides the routines myLCDO put char myLCDO put string and myLCDO put number for displaying characters strings and numbers on the LCD The myLCDO put number displays a number in decimal and right justified within a specified field width The demo software does not use the printf routine because the printf routine is very large and slow Instead the PutHumidity and Putlemperature routines call the myLCDO put number routine which is much smaller and quicker 4 6 IC Driver The 190 driver provides routines for reading and writing registers on an IC slave device The 190 driver is implemented in the myl2C0 c file The 1200 ReadByte routine and the 1200 WriteByte routine read and write 8 bit registers on an I2C slave device The demo software uses these routines to access most registers on the Si7013 The 12CO_ReadData routine and 12CO_Wri
6. card which acts as the system motherboard The Si7013EVB UDP M3L1 kit also includes a CD containing software and documentation including this manual 2 Hardware Description Figure 1 shows the Si7013EB UDP plugged into an SiM3L1xx MCU card SiM3L1xxLCD B DK Figure 2 is a close up of the Si7013EB UDP port header card As will be explained in more detail below the Si7013EB UDP can be used with other Silicon Laboratories unified development platforms The Si7013 temperature and humidity sensor uses the standard IC communications protocol This two wire bidirectional bus has a clock signal SCL and a bi directional data line SDA For more information about the Si7013 and its 1 C interface refer to the Si7013 data sheet Two independent 1 C buses are implemented on the port header card one for the on board Si7013 and one for an optional postage stamp size evaluation board connected via a flex cable Figure 3 shows an external postage stamp size evaluation board for the Si7013 Si7020 or Si7021 The postage stamp size evaluation boards and a 3 foot flat flexible cable are included with the Si7013USB DONGLE evaluation kit and can be ordered separately Rev 0 2 9 13 Copyright 2013 by Silicon Laboratories i7013EVB UDP M3L1 i7013EVB UDP M3L1 Figure 1 Si7013EB UDP Port Header Card Plugged into a UDP SiM3L1xx MCU Card with Multiplexed LCD Figure 2 Si7013EB UDP Port Header Card Figure 3 Si70
7. this means the MCU card cannot communicate with the Si7005 port header card E ESP Rev 0 2 15 SILICON LABS i7013EVB UDP M3L1 4 7 2 1 2 Sensor Data The Sensor Data box shown in Figure 12 displays the current humidity and temperature Sensor Data Humidity 43 9 4 Temperature 264 C f Celsius Fahrenheit Figure 12 Sensor Data Box This box displays the temperature and humidity from the most recent sample The Celsius and Fahrenheit radio buttons select whether the temperatures displayed in this box the Thresholds box and the Log Data box are in Celsius or Fahrenheit These radio buttons do not affect how temperatures are displayed in the LCD 4 7 2 1 3 Data Logger Time The Data Logger Time box shown in Figure 13 is used to set the time in the Data Logger firmware Data Logger Time Time Zone Central Standard Time Time 10 2 2012 11 12 06 AM f 12Hour Y 24 Hour Set Data Loggerto PC Time Figure 13 Data Logger Time Box The upper part of this box displays the current time and current time zone of the Data Logger firmware The 12 Hour and 24 Hour radio buttons select the format of the time displayed in this box and in the Log Data box The Set Data Logger to PC Time button sets the time of the Data Logger firmware to the time of the PC This button also sets the time zone in the Data Logger firmware to the time zone of the PC The Data Logger firmware does not use the time zone informa
8. 13 Postage Stamp Evaluation Board gt E 2 Rev 0 2 SILICON LABS SiI7013EVB UDP M3L1 2 1 Si7013EB UDP Schematics and BOM Figure 4 shows the schematics of the Si7013EB UDP port header card VDD is connected to port pin 17 and GND is connected to port pin 16 This is the standardized location for power and ground on Silicon Laboratories UDP port headers For port headers with only 8 port pins the card can be offset with power and ground pins connecting properly and pins 1 8 of the Si7013EB UDP overhanging By default the on board Si7013 U1 connects SDA to port pin P1 5 SCL to P1 6 and CS to P1 7 There is an optional 6 pin flat flexible header connector J2 that can connect to an external postage stamp size evaluation board for the Si7013 Si7020 or Si7021 The postage stamp size evaluation boards and a 3 foot flat flexible cable are included with the Si 013USB DONGLE evaluation kit and can be ordered separately The optional postage stamp evaluation boards would have SDA connect to port pin 1 3 SCL to P1 4 and CS to P1 2 The BOM for the S1 013EB UDP is shown in Table 1 Table 1 Si7013 UDP Bill of Materials Tol PCB Mfr Part Number Mfr Footprint 20 C0603 CO603X5R6R3 475M Venkel 20 C0402 C0402X7R160 104M Venkel CONN6N FPC FH12 6S 0 5SH 55 Hirose FFC PO 5 SSW 109 02 F D RA Samtec R1 R2 R13 ThickFilm CR0402 16W 1002J Venkel R3 R4 ThickFilm CR0402 16W 2001J Venke
9. Celsius For example 43 7 percent RH is 437 deci percent RH Likewise 25 4 degrees Celsius is 254 deci degrees Celsius The demo software uses equations that are derived from the equations in the Si7005 data sheet The derived equations are modified to use deci units E 8 Rev 0 2 SILICON LABS SiI7013EVB UDP M3L1 4 3 Timeout The Timeout component provides delay and timeout capabilities The Timeout component is implemented in the myCPU c file The AppBuilder generated gCPU c file implements a tick counter called msTicks The tick counter is incremented once a millisecond The current value of the tick counter is obtained by calling get msTicks Timeouts are implemented by calling get msTicks to get a starting time and then repeatedly calling ElapsedTime to get the number of milliseconds that have elapsed since the starting time The Delay routine does not return until the specified number of milliseconds have elapsed 4 4 Button The Button component changes the temperature scale between Celsius and Fahrenheit when the user presses the S1 button In addition the S2 button switches the temperature readings between the internal sensor and the external thermistor The Button component is implemented in the myPB c file The S1 button on the MCU board is connected to bit 4 of port bank 1 PB1 4 This bit is high when the button is not pressed but when the button is pressed the bit goes low The S2
10. and return the value from the Si7013 s Data register The Sensor ReadTemperature and Sensor ReadThermistor routines convert the returned value to deci degrees Celsius The Sensor ReadHumidity routine converts the returned value to deci percent relative humidity The 817013 must contain a thermistor correction coefficient table before the thermistor can be read The Sensor component contains the routines Sensor ReadCoefficient and Sensor WriteCoefficient for reading and writing coefficients in the Si7013 The Sensor enter default mode from reset routine calls the Sensor ReadCoefficient routine to check if the Si7013 contains the thermistor correction coefficient table If the table has not been programmed the Sensor enter default mode from reset routine calls the Sensor WriteCoefficient routine to write the coefficients to the Si7013 The coefficient table only needs to be programmed once The Sensor component also provides the Sensor Sleep and Sensor WakeUp routines These routines are now needed by the Si7013 because the Si7013 automatically sleeps between commands The demo software does not use floating point numbers because the floating point library is large and slow The demo software avoids floating point numbers by using deci units A deci unit is one tenth of a unit The Sensor ReadHumidity routine returns the humidity in deci percent RH and the Sensor ReadTemperature routine returns the temperature in deci degrees
11. ank and buttons S1 S3 do not work In awake mode the firmware does not enter low power mode the LCD is not blank and the buttons work normally 4 7 2 2 1 Buttons The Data Logger firmware uses three buttons and an LED as shown in Figure 21 H HS i SE 81 6 JOYSTICK PB1 4 UP PB1 5 LEFT PB1 6 RIGHT U9 PB1 7 DOWN PBO 1 CENTER 20 ANALOG Figure 21 Data Logger Firmware Buttons a 20 Rev 0 2 SILICON LABS Si7013EVB UDP M3L1 To wake up the Data Logger firmware press down on the center of the joystick button U9 The buttons S1 S3 do not work unless the firmware is awake If no button is pressed within 15 seconds the firmware goes back to sleep S1 changes the information that is displayed on the LCD The LCD rotates through the following displays m Temperature and Humidity Date Time m Sample Count If there is an alarm the Data Logger firmware displays a flashing alarm message on the LCD The alarm message can be dismissed by pressing S1 This allows the normal displays to be seen until the next alarm occurs S2 toggles the displayed temperature between Celsius and Fahrenheit S3 starts and stops logging If logging is disabled pressing S3 enables logging If logging is enabled pressing S3 disables logging If logging is enabled samples are stored in the log The Data Logger firmware blinks DS8 when a sample is taken This allows you to verify that samples are being taken at the expect
12. ation and Software CD CP210x VCP Win _XP_S2K3 Vista 7 exe 2 Use the InstallShield Wizard to install the VCP driver Welcome to the InstallShield Wizard for Silicon Laboratories CP210x CP Drivers for Windows MP 2003 Serverfvista v6 5 3 The InstallShield Wizard will copy Silicon Laboratories CPA Os YCF Drivers for Windows P2003 Server vistas 6 5 3 onto pour computer To continue click Next Figure 6 InstallShield Wizard 3 At the InstallShield Wizard Complete window make sure that Launch the CP210x VCP Driver Installer is checked then click on the Finish button This begins the installation of the USB to UART bridge driver E Rev 0 2 11 SILICON LABS Si7013EVB UDP M3L1 Silicon Laboratories CP210x VCP Drivers for Windows XP 2003 Server Vista 7 InstallShield InstallShield Wizard Complete The InstallShield Wizard has successfully copied the Silicon Laboratories CP2170s VCP Drivers for Windows RH 200 2 Sener vistas v6 5 3 to pour hard dive The driver installer listed below should be executed in order to install drivers or Update an esisting driver Launch the CRM Os YCF Driver Installer Click Finish to complete the Silicon Laboratories CPM Os YCF Drivers for Windows amp P 2003 Server Vista v6 5 3 setup lt Back Cancel Figure 7 InstallShield Wizard Complete Window 4 When the installation of the bridge driver is complete finalize
13. button on the MCU card The Erase Log button deletes all the samples in the log 4 7 2 1 6 Information The Information box displays version and identification information Information aUl Version 1 0 FWY Version 1 0 Microcontroller Ca051F960 Sensor Si ADS Figure 16 Information Box 4 7 2 1 7 Thresholds The Thresholds box is used to configure alarm thresholds A humidity alarm occurs if the humidity is greater than the high humidity threshold or less than the low humidity threshold A temperature alarm occurs if the temperature is greater than the high temperature threshold or less than the low temperature threshold The Thresholds box displays the current threshold settings If a text box is empty that threshold is not used If all text boxes are empty then no humidity or temperature alarms are generated by the Data Logger firmware To set the thresholds enter numbers into the text boxes and then click on the Set Thresholds button If you do not want to use a particular threshold then make that text box empty and click on the Set Thresholds button A humidity threshold may be from 0 to 100 A temperature threshold may be from 40 to 85 if the Celsius radio button is selected and from 40 to 185 if the Fahrenheit radio button is selected Rev 0 2 17 SILICON LABS i7013EVB UDP M3L1 4 7 2 1 8 Log Data The Log Data box shown in Figure 17 displays log data in humidity and temperature g
14. d from the power supply except when the data log is being read or configured Rev 0 2 5 SILICON LABS i7013EVB UDP M3L1 3 Software Description The Si7013EVB UDP SIM3L1xx contains two software projects m Demo Software m Data Logger The purpose of the Demo Software is to provide simple example code The Data Logger project provides a more full featured demonstration of the capability of the Si7013 and SIM3L1 xx 3 1 Demo Software The Si7013 Unified Development Platform UDP Demo software runs on a UDP SiM3L1xx MCU card UDP SIM3L1XX LCD MCU The MCU card may be plugged into a UDP motherboard but this is not necessary A Si7013 port header card Si7013EB UDP is plugged into the MCU card The demo reads the temperature and humidity from the Si7013 port header card and displays them on the MCU card s LCD The user may press the S1 button to toggle the displayed temperature between Celsius and Fahrenheit The user may press the S2 button to switch the displayed temperature from the internal temperature sensor and the external thermistor When the thermistor is displayed a dot is shown after the temperature 3 1 1 Running the Demo Software The Si7013 UDP SiM3L1xx Evaluation Board Documentation and Software CD contains the source code for the Demo Software However you do not need to build the Demo Software because the CD also contains a pre built image file and a batch file to download the image file to the MCU card
15. ed rate If the Data Logger application is not connected to the MCU card then DS8 is off except for occasional blinks If the Data Logger application is connected to the MCU card then DS8 is on except for occasional blinks This allows you to verify that the Data Logger application is successfully communicating with the Data Logger firmware 4 7 2 2 2 LCD Displays There are five LCD displays for temperature and humidity date time sample count and alarm The LCD is blank while the Data Logger is sleeping To see information on the LCD press down on the center of the joystick button 4 7 2 2 2 1 Temperature and Humidity Display This display shows the temperature and humidity from the most recent sample Figure 22 Temperature and Humidity Display You can press the S2 button to switch the temperature between Celsius and Fahrenheit 4 7 2 2 2 2 Date Display This display show the current date Figure 23 Date Display The date is formatied as month day of month year E Rev 0 2 21 SILICON LABS Si7013EVB UDP M3L1 4 7 2 2 2 3 Time Display This display shows the current time Figure 24 Time Display The format of the time is hours minutes seconds A or P This display allows you to verify that the time is set correctly 4 7 2 2 2 4 Sample Count Display This display shows the current number of samples in the log Figure 25 Sample Count Display This display also indicates if logging is enabled
16. hat Success No errors reported is displayed in the command window 8 Press any key to close the command window Initially the MCU board is in low power sleep mode In sleep mode the LCD is blank and the S1 S3 buttons do not work To wake up the MCU board press down on the center joystick button When the MCU board is awake the Data Logger firmware displays temperature and humidity on the LCD The LCD is updated every two minutes with new temperature and humidity readings If you prefer the temperature to be displayed in Fahrenheit then press the S2 button If no button is pressed within 15 seconds the MCU board goes back to sleep The Data Logger firmware is now installed on the MCU card and the USB Debug Adapter is no longer needed Disconnect the USB Debug Adapter from the debug connector on the MCU card E 10 Rev 0 2 SILICON LABS Si7013EVB UDP M3L1 4 7 1 2 Installing CP210x Drivers The MCU card contains a CP2103 USB to UART bridge chip The Data Logger application uses a virtual COM port VCP on the PC to send serial packets to the CP2103 over USB The CP2103 then uses its UART to forward the packets to the Data Logger firmware This section installs two drivers on the PC m CP210x VCP Driver m CP210x USB to UART Bridge Driver Perform the following steps to install these drivers 1 Run the following program from the UDP_Software_v2 0 folder of the Si7013 UDP SiIM3L1xx Evaluation Board Document
17. l R5 R6 R7 ThickFilm CR0402 16W 000 Venkel R8 R9 R10 R11 R12 R15 R16 R14 NTC NCP18XH103F03RB thermistor Si7013 Humidity QFN24 Si7013 A GM1 Silicon 4x4P0 5 Labs Rev 0 2 3 SILICON LABS i7013EVB UDP M3L1 2 2 Si7013EB UDP Schematic NC TC ARa ON 9r anvo 62 99 JIS9JUT IOISTUISUA wore AS anyo vo NC TC sia 9 BLISYIS JAaN JISGOOZIS r INDIA GND cdl cr Edil Ocdl tdl O58 G 121 3 vas J o 2 QLNI SOD JOIJSTUISUL S70USY NNIA 600 ve O dNIA 8 d1 JOJSTUISUL S70USY E O gt oc SILICON LABS SiI7013EVB UDP M3L1 2 3 Extending Battery Life The data logger demo will work for several days on a fresh battery once disconnected from the PC At the default sample rate of once per two minutes the 8192 point storage buffer will fill at about 11 4 days so generally the buffer will not fill before the battery runs out In a real application where it might be desirable to extend battery life and record data for longer time periods the following steps are recommended 1 Reduce the interval between samples so the buffer will not fill during the time period desired 2 Although powered down the USB interface and level translators U4 and U5 of the SIM3L1xx MCU Card with Multiplexed LCD MCU consume power and are not needed in operation See Figure 12 of the SiM3L1xx LCD User s Guide These can be disconnecte
18. oard battery refer to the UDP SiIM3L1xx user s guide Disconnect the MCU card from the PC and take it to the location where you want to take samples Press the S3 button on the MCU card to start logging Wait while samples are logged Press the S3 button on the MCU card to stop logging 9 Take the MCU card back to the PC and reconnect it to the PC 10 Use the Data Logger application to display the log data 11 Save the log data to a file The Data Logger firmware can generate alarms when the temperature or humidity gets too high or too low When an alarm occurs the Data Logger firmware displays a flashing message on the LCD and pulses an output pin If a buzzer is connected to the output pin an audible alarm is produced The Data Logger application can configure the thresholds for the alarms See eS O E 14 Rev 0 2 ESP SILICON LABS i7013EVB UDP M3L1 4 7 2 1 Using the Data Logger Application The Data Logger application runs on a PC and is used to configure the Data Logger firmware The Data Logger application can also display the log data To run the Data Logger application from the Start menu select Start gt Silicon Laboratories Si70xx Data Logger This opens up the Data Logger application shown in Figure 10 E Si70xx Data Logger e Thresholds Log Data Humidity 0 SILICON LABS S E Humidity F Data Logger Sta
19. raphs Log Data Humidity 70 E 60 T E 50 40 30 6 00 PM 9 00 PM 10 00 PM 11 00 PM 12 00 AM 1 00 AM Time Minimum Humidity 46 Average Humidity 62 2 Madmum Humidity 79 2 X Temperature Po Es Temperature C 69 KM oo M E DO PM 8 00 PM 10 00 PM 11 00 PM 12 00 AM 1300 AM Time Minimum Temperature 140T Average Temperature 174 C Maximum Temperature 27 8 T Get Log Data Save Log Data Restore Log Data Figure 17 Log Data Box Temperature and Humidity Graphs The Get Log Data button transfers all of the samples from the MCU card to the PC and displays them in the humidity and temperature graphs The application also displays the minimum maximum and average values for temperature and humidity The Save Log Data button saves the log data to a file in comma separated value CSV format A dialog box allows you to specify the name and location of the file The Restore Log Data button allows you to redisplay a CSV file that was previously saved with this application If you want to zoom into an area of a graph then create a dashed box around the area by dragging the left mouse button across the graph as shown in Figure 18 6 18 Rev 0 2 ESP SILICON LABS Si7013EVB UDP M3L1 Humidity Humidity WRH 8 00 PM 2 00 PM 10 00 PM 11 00 PM 12 00 AM 1 00 AM Time Figure 18 Zooming in on a Portion of the Graph The graph will zoom in to the selected area You may pan a
20. round the graph by first holding the Ctrl key then dragging the graph with the left mouse button You may also use the mouse wheel to zoom in and out If you click a graph with the right mouse button a context menu is displayed as shown in Figure 19 Humidity oD s0 Copy z 70 save Image As Page Setup 60 Print T E Show Point Values 50 Un Zo00m 40 Undo All Zoom Pan Set Scale to Default 2 00 PM 9 00 PM 10 00 PM 11 00 PM 12 00 AM 1 00 AM Time Figure 19 Context Menu The context menu allows you to unzoom the graph The context menu also lets you save and print images of the graph If you select Show Point Values from the context menu and hover the mouse over the graph line a tool tip displays the time and value for that point on the graph as shown in Figure 20 Rev 0 2 19 SILICON LABS Si7013EVB UDP M3L1 Humidity Humidity S 3 a 20 00 21 00 22 00 23 00 00 00 01 00 Figure 20 Sample Time and Value 4 7 2 2 Using the Data Logger Firmware The Data Logger firmware runs on an MCU card where it logs temperature and humidity data The Data Logger firmware also generates alarms if the temperature or humidity become too high or too low The user interface for the Data Logger firmware uses buttons LCD displays and an output pin to sound a buzzer The Data Logger firmware is normally in sleep mode In sleep mode the firmware enters low power mode between samples the LCD is bl
21. st accept this agreement Figure 8 Software License Agreement 3 Use the Si70xx Data Logger Setup Wizard to install the application SILICON LABS Rev 0 2 13 i7013EVB UDP M3L1 Hal 1 0xx Data Logger The installer will guide you through the steps required to install 5708 Data Logger on pour computer WARNING This computer program is protected by copyright law and international treaties Unauthorized duplication or distribution of this program or any portion of it may result in severe civil or criminal penalties and will be prosecuted to the maximum extent possible under the law Figure 9 Si70xx Data Logger Setup Wizard 4 7 2 Using the Data Logger When running the Data Logger firmware for the first time the firmware takes a sample every two minutes but does not store the samples in the log To start storing samples press the S3 button Each sample includes temperature humidity and a time stamp The firmware s clock has not yet been set so time stamps begin at midnight January first 2000 You may use the Data Logger application to display the stored samples The application can also set the firmware s clock and adjust the time between samples The typical procedure for using the Data Logger is as follows 1 Connect the MCU card to the PC with a USB cable Use the Data Logger application to stop logging and erase the log set the time and the desired sample interval Ensure the MCU card is set up to use the onb
22. teData routine perform multi byte reads and writes from an I C slave device The demo software uses the I2CO_ReadData routine to read the 16 bit Data register on the Si7013 The Si7013 port header card has two I2C buses The first bus is connected to the onboard Si7013 device The second bus is connected to the flat flexible cable FFC connector J2 on the side of the board A second Si7013 device can be attached to the FFC connector The Bus parameter in each of the IC routines selects which bus to use I2C_ BUS 1 orl2C BUS 2 Rev 0 2 9 SILICON LABS i7013EVB UDP M3L1 4 7 Data Logger The Si70xx Data Logger demonstrates how the SiM3L1xx microcontroller unit MCU and the Si7013 sensor can be used to record temperature and humidity over an extended period of time This project includes Data Logger firmware that runs on a SIM38L1xx MCU card UDP SIM38L1XX LCD MCU and a Data Logger application that runs on a PC The Data Logger firmware reads the temperature and humidity from the Si7013 port header card Si7013EB UDP which is plugged into the MCU card and stores the samples in the MCU s flash memory The flash memory can store up to 8192 samples The Data Logger application displays the samples on a graph 4 7 1 Installing the Data Logger There are three steps required to install the Data Logger 1 Install the Data Logger firmware on the MCU card 2 Install CP210x drivers on the PC 3 Install the Data Logger applica
23. the installation by connecting the MCU card to the PC with a USB cable 4 7 1 3 Installing the Data Logger Application Perform the following steps to install the Data Logger application from the UDP Software vX X folder of the Si7013 UDP SiIM3L1xx Evaluation Board Documentation and Software CD 1 Run the following program from the Si7013 UDP SiM3L1xx Evaluation Board CD DataLoggerSetup_vX X exe where X X is the current version number 2 Accept the Software License Agreement by clicking on the Yes button 12 Rev 0 2 SILICON LABS i7013EVB UDP M3L1 S1 Oxx Data Logger Please read the following license agreement Press the PAGE DOWN key to see the rest of the agreement ing SOFTWARE LICENSE THIS SOFTWARE LICENSE RESTRICTS USE OF THIS SOFTWARE IT MAY ONLY BE USED IN CONNECTION WITH INTEGRATED CIRCUITS SUPPLIED BY SILICON LABS This Software License Agreement this Agreement is entered into by the Licensee and Silicon Laboratories Inc located at 400 W Cesar Chavez Austin TX 78701 and Silicon Laboratories Intemational Pte Ltd located at No 6 Serangoon North Avenue 5 06 01 Singapore 554910 collectively Silicon Labs Silicon Labs is willing to grant Licensee a license to use this Software only upon Licensees acceptance of the tems and conditions set forth below N 4 you accept all of the terms of the preceding License Agreement f you choose No Install will close To install you mu
24. tion it is simply used to document the context of the time stamps in case the Data Logger travels to different time zones 4 7 2 1 4 Sample Interval The Sample Interval box shown in Figure 14 is used to configure how often samples are taken Sample Interval Samples are taken every Seconds 1 Set Minutes Figure 14 Data Logger Time Box This text box displays the current setting of the sample interval To change the sample interval enter a number into the text box select Seconds or Minutes and then click on the Set button The sample interval may be from 1 second to 1092 minutes 18 hours E 6 16 Rev 0 2 ESP SILICON LABS SiI7013EVB UDP M3L1 4 7 2 1 5 Logging The Logging box shown in Figure 15 is used to control the log in the Data Logger firmware Logging Samplesin log 315 Stop Linn Erase Log Figure 15 Logging Box The upper part of this box displays the current number of samples in the log The Data Logger firmware constantly takes samples and displays them on the LCD If logging is enabled the samples are also saved in the log Samples continue to be taken when logging is disabled If logging is enabled the left button says Stop Logging and logging is disabled if this button is clicked If logging is disabled the left button says Start Logging and logging is enabled if this button is clicked Note Logging may also be enabled and disabled with the SW3
25. tion on the PC 4 7 1 1 Installing the Data Logger Firmware The Si7013 UDP SiIM3L1xx Evaluation Board Documentation and Software CD contains the source code for the Data Logger firmware However you do not need to build the Data Logger firmware because the CD also contains a pre built image file and a batch file to download the image file to the MCU card This is done using the following procedure 1 Plug the Si7013 port header card onto J21 PBO of the MCU card The Silicon Labs logo on the port header card faces the power connector on the MCU card Make sure that the VIO pin on the port header card matches up with the VIO pin on J21 The top 4 pins 1 4 of the port header card do not connect with J21 2 Connect the USB Debug Adapter to a USB port on the PC and connect the USB Debug Adapter to the debug connector J14 on the MCU card 3 Connect the power supply to the MCU board J6 4 Verify that the switches on MCU card are set correctly Table 3 MCU Card Switch Settings Switch Label VBAT Sel 3 3 V_VREG center VIORF Sel VBAT down VIO Sel VBAT down 5 Open Windows Explorer and change to the project folder UDP_Software_vxX X DataLogger FW SiIM3L1 xx where vX X is the version number of the UDP software 6 Double click on the Install Si70xx bat file in the project folder This opens a command window and downloads the pre built image file JDP_DataLogger_Si70xx hex to the MCU card 7 Verify t
26. ture to be displayed in Fahrenheit then press the S1 button The demo software is now installed on the MCU card and the USB Debug Adapier is no longer needed Disconnect the USB Debug Adapter from the debug connector on the MCU card Rev 0 2 7 SILICON LABS i7013EVB UDP M3L1 4 Source Code for the Demo Software The source code for the demo software consists of six components Main Sensor Timeout Button LCD Driver I2C Driver 4 1 Main The Main component is the entry point for the demo software and it calls routines in the other components to run the application The Main component is implemented in the main c file The main routine calls enter default mode from reset and Sensor enter default mode from reset to initialize the hardware and to initialize the sensor The main routine then enters an infinite loop where it reads the temperature and humidity from the sensor and then displays them on the LCD The main component contains the PutTemperataure and PutHumidity routines which display the temperature and humidity on the LCD 4 2 Sensor The Sensor component provides routines for reading temperature and humidity from a Si7013 device The Sensor component is implemented in the mySensor_Si70xx c file The Sensor component provides the routines Sensor ReadTemperature Sensor ReadThermistor and Sensor ReadHumidity These routines call the Sensor Measure routine to take a measurement
27. tus 70 Status OK 60 3 Sensor Data 5 Humidity 43 9 Low T Humidity Temperature 264 C 40 Celsius Fahrenheit 30 3 00 PM 9 00 PM 10 00 PM 11 00 PM 12 00 AM 1 00 AM Data Logger Time Time Time Zone Central Standard Time Minimum Humidity 34 6 Average Humidity 62 2 Maximum Humidity 792 Time 10 2 2012 11 12 06 AM 12Hour 24 Hour Temperature Set Data Loggerto PC Time High Temperature Sample Interval Samples are taken every Seconds 1 Set Minutes sa 5 Low Logging Temperature S Samples 10109 315 C Erase Log 8 00 PM 9 00 PM 10 00 PM 11 00 PM 12 00 AM 1 00 AM cos Time Information Minimum Temperature 14 0 C Average Temperature 174 C Maximum Temperature 27 8 C GUI Version 1 0 FW Version 1 0 Set Microcontroller C8051F960 Thresholds Save Log Data Restore Log Data Sensor Si7005 Figure 10 Data Logger Application The left side of the application window is used to configure the Data Logger firmware The right side of the application window is used to display log data 4 7 2 1 1 Data Logger Status The Data Logger Status box shown in Figure 11 displays the status of the Data Logger firmware Data Logger Status Status OK Figure 11 Data Logger Status Box If there are no alarms or errors this box displays OK If there is an alarm this box displays an alarm message If the status is Communications Error
28. umes no responsibility for the functioning of undescribed fea tures or parameters Silicon Laboratories reserves the right to make changes without further notice Silicon Laboratories makes no warran ty representation or guarantee regarding the suitability of its products for any particular purpose nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation consequential or incidental damages Silicon Laboratories products are not designed intended or authorized for use in applications intend ed to support or sustain life or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders y s E 26 Rev 0 2 ESP SILICON LABS
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