UM10774 - NXP Semiconductors
Contents
1. 12 Calibration command set offset correction parametern osni ernier aeiia 12 Calibration command calibrate voltage range for voltage channel 13 All information provided in this document is subject to legal disclaimers Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Calibration command calibrate current range for current Channel cccccsceceeeeeeeeeteeeees 13 Calibration command calibrate phase correction for current channel 000 14 Calibration command program Offsets 15 Calibration command program Ranges 15 EM783 SDK configuration parameters 17 EM783 temperature compensation example for GUENI eiciia eiaa cede aaa nie 21 EM783 temperature compensation example for phase Angle escceeeeeeeceeeseceeeeseeeeerseeeeees 22 NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 26 of 27 NXP Semiconductors UM10774 9 Contents EM783 Software Development Kit SDK Introduction ce ceseteeesseeeeeeseceeeenseeeeeneseenenseeenenns Key applications 0 ce eeseeeesseeeesneeeeeeneeeeeeee Block diagram 00 eeeeeeeneeeeeeeneeeeeeeeeeeeneeeeneas D ISCIAUMGE sscscetese cides de sates Jacueeaactaeseneenenansaacatedanes Support information ccscceeseeeseeeeseeeeteeeeaes REfCLENCES ccceceeeeeceneeceeeeeseseeaeeeeeeseeeesnaeeees EM783 evaluation module ove2. NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK The EM783 is pre flashed with the reference application firmware and includes the metrology library binary for the evaluation Warning e Do not try to open the box when it is connected to the mains supply e Do not to connect USB without isolation which can result in incorrect measurement and cause potential damage to the PC Laptop UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 6 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 3 Evaluating EM783 UM10774 3 1 3 2 3 3 3 3 1 3 3 2 Building the project 1 Install the SDK package using the installer EM783_SDK_ lt x y gt exe 2 Navigate to the folder srclapp projects keil 3 Open the project EM783_ lt variant gt uvproj using Keil IDE tool variant refers to EM783 variants MC3 MC6 SC SP and TP 4 Click Project and select Build target to build the project This generates the EM783_ lt variant gt hex and EM783_ lt variant gt axf images in the folder src app projects keil lobjs_ lt variant gt Flashing the image 1 Download and install the Flash Magic tool ensure the tool version is at least 7 51 3222 2 Ensure the EVM is powered off SW3 in OFF position Connect a UART to USB serial cable between the connector J12 o
3. NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 3 3 2 1 Initialization message On powering up the EVM the message is displayed on the LCD panel as shown in Fig 4 while the metrology engine is initializing The figure shown below is an example for the MC8 variant Fig 4 EM783 initialization message 3 3 2 2 Metrology parameter display Once the initialization is complete the measurement results are displayed on the LCD panel as shown in the figure below The display consists of four sections 1 Total Energy and Total power This section displays the total accumulated energy in kWh and the total power in W a The total energy is the sum of the accumulated energy from all the channels and is displayed in XXX YY format b The total power is the sum of the instantaneous power from all the channels and is displayed in XXXXX YY format c The total accumulated energy is displayed for 1 second is as shown in Fig 5 Fig 5 Total accumulated energy display d This is followed by the display of the total power for the next 1 second as shown in Fig 6 Fig 6 Total instantaneous power display UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 8 of 27 NXP Semiconductors U M1 0774 UM10774 EM783 Software Development Kit SDK e Steps c
4. Example To set offset of voltage channel 1 to 0 enter the following command in the serial terminal CSO V 10 4 Use the CDM command in the serial terminal to display the metrology results Note down the positive peak voltage and the negative peak voltage values 5 If the values of the positive peak voltage and the negative peak voltage for the channel are different then the offset calibration needs to be performed All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 15 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 6 Adjust the value of the offset for the channel being calibrated using the command CSO in the serial terminal until both the positive peak and the negative peak voltage values are almost the same 7 Program the new offset value into the EEPROM by entering the command CPO in the serial terminal 3 5 3 2 Calibration of current channel offset 1 Set the offset parameter for the current channel being calibrated to 0 using the CSO command Example To set offset of the high gain current path of channel 1 of MC3 variant to 0 enter the following command in the serial terminal CSO 1H 0 2 Use the CDM command in the serial terminal to display the metrology results Note down the positive peak current and the negative peak current values 3 If the values of the positive peak current an
5. List of figures Fig 1 EM783 block diagram ccceeeeeeeeeeeteteneerenes 4 Fig 8 CDO command output for MC3 variant 11 Fig 2 Caution ersintinntentinciedhs einen 4 Fig 9 CDR command output for MC3 variant 12 Fig 3 EM783 SDK folder structure eeeeeeeeeeee 5 Fig 10 Plot of correction factor for current versus Fig 4 EM783 initialization Message ccceeeeees 8 temperate oirnne ai usin e aena 20 Fig 5 Total accumulated energy display 8 Fig 11 Plot of correction factor for phase angle versus Fig 6 Total instantaneous power display 8 temperatUre onein enaena 22 Fig 7 CDM command output for MC3 variant 11 UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 25 of 27 NXP Semiconductors UM10774 8 List of tables EM783 Software Development Kit SDK Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 UM10774 EM783 EVM SWD pin mapping cee 9 Default SWD pin mapping eeeeeeeeeeeee 9 EM783 variant configuration parameters 10 Calibration command display metrology result E TE E E eee ee ree reece ee tee oe 10 Calibration command display offset COITOCTIONS 0 02 ccecceceeeeeceeeceeeeeeeeeeeaeeeeeeeeeeeeeaes 11 Calibration command display ranges
6. and d are repeated by the metrology engine as long as the meter is running 2 Channel Voltage This section displays the instantaneous channel voltage in V The voltage is displayed in XXX Y format 3 Channel Current This section displays the instantaneous channel current in A a The channel number for which the value of current voltage and power is being displayed is identified using the following notation C lt channel id gt b The channel id ranges from 1 to the maximum number of current channels present in the EM783 variant c The current is displayed in X YY format 4 Channel Power This section displays the instantaneous channel power in W a The channel power is displayed in XXXX Y format b If the channel power is greater than 9999W the display changes to XXXXX format to accommodate the maximum value of the power The channel current and channel power sections display the per channel data and is refreshed every 2 seconds in the following order Channel 1 Channel 2 Channel 3 Channel max Channel 1 and so on 3 4 SWD pin configuration for EM783 1 EM783 EVM will be pre flashed with the reference application including the metrology library The reference application maps the EM783 SWD signals as shown in Table 1 Table 1 EM783 EVM SWD pin mapping SWD Signal EM783 Pin Name Pin Number SWDIO PO_3 11 SWCLK PO_5 19 2 Attach the SWD debugger to the debug connector J1 3 If the refer
7. 000004 0 000010 0 069803 0 002338 0 000007 0 000040 0 069773 0 0022452 0 000100 0 000070 0 069743 Following notations are used in this table Notation PhitL Deltaphi1L T PhitLm Formula Meaning Phase angle value measured for channel 1L for power factor 1 Phase angle correction factor for channel 1L obtained after calibration Temperature to which the EVM is subjected to in degree Celsius Measured phase angle in radians from channel 1L at the set temperature All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 22 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK Corr_ideal Pref Pm Ideal correction factor Corr_estimated 3e 6 T 7e 5 Correction factor estimated using the best fir curve Deltaphi1L_comp Pcal C Corrected calibration parameter UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 23 of 27 NXP Semiconductors UM10774 6 Legal information EM783 Software Development Kit SDK 6 1 Definitions Draft The document is a draft version only The content is still under internal review and subject to formal approval which may result in modifications or additions NXP Semiconductors does not give any representations or warrantie
8. UART driver interrupt priority 16 bit Timer BO interrupt priority used by the Kilo Watt Hour KWH pulser module SSP driver interrupt priority Systick timer interrupt priority GPIO interrupt priority UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 17 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK SI Configuration option Default value Valid values Purpose No ORITY Refer METROLOGY_DEFAUL EM783_FAQ for T_INTEGRATION_PERI recommended Number of mains periods to be used in the 12 OD 130 values calculation of the metrology parameters METROLOGY_DEFAUL Application 13 T_MVDD 3300 defined EM783 VDD voltage in mV Define this macro to enable the metrology engine calibration interface SUPPORT_CALIBRATI Defined or Undefined this macro to disable metrology engine the 14 ON Defined undefined calibration interface Define this macro to enable logging metrology data Defined or into a circular buffer in the EEPROM 15 SUPPORT_LOGGER Disabled undefined Undefined this macro to disable the logger module Application Defines the rate in seconds at which the metrology 16 LOG_RATE_S 10 60 defined data are logged into the EEPROM Define this macro to enable debug messaging on the UART interface SUPPORT_UART_DEB Enabled or Undefine this macro to disable debug messaging on 17 UG Enabled d
9. communicate with the ZigBee module 4 RS485 EM783 UART data can be routed to the RS485 transceiver on the EVM The RS485 signals are available at connector J8 5 12C EM783 2C interface is available at the expansion connector J4 6 SPI EM783 SPI interface is available at the expansion connector J4 The EM783 SDK provides the following configuration options to enable or disable the required communication interfaces Table 13 EM783 SDK configuration parameters Defined in app inc app_config h SI Configuration option Default value Valid values No 12000000 24000000 EM78X_CORE_CLOCK 36000000 1 SPEED HZ 36000000 48000000 Application 2 EM78X_TICK_RATE_HZ 1000 defined LED_BLINK_RATE_IN Application 3 MS 250 defined LCD_REFRESH_RATE_ Application 4 NMS 1000 defined EM783_CONSOLE_BAU Application 5 DRATE 57600 defined 12C_INTERRUPT_PRIO 6 RITY 3 2o0r3 UART_INTERRUPT_PRI 7 ORITY 3 2o0r3 TMR16B0_INTERRUPT 8 _PRIORITY 3 2o0r3 SSP_INTERRUPT_PRIO 9 RITY 3 2o0r3 SYSTICK_INTERRUPT_ 10 PRIORITY 3 2o0r3 11 GPIO_INTERRUPT PRI 3 2or3 Purpose Sets the EM783_CORE_FREQUENCY_HZ EM783_CORE_FREQUENCY_HZ Is defined in comps cmsis CMSIS_3_01 CMO0 DeviceSupport EM7 8X system_EM78x c Configures the tick rate of the Cortex MO Systick timer Rate at which LED D5 is blinked in ms Rate at which the metrology parameters are refreshed in the LCD in ms Baud rate of the EM783 console interface 12C driver interrupt priority
10. load 3 5 2 Calibration commands This section lists the set of commands available for calibrating the EVM These commands can be entered into the serial terminal any time after the metrology initialization is complete The number of voltage channels NR_VOLTAGE_CHANNELS current channels NR_CURRENT_CHANNELS and the number of gain channels total number of current channels including the high and low gain channels NR_GAIN_CHANNELS for the EM783 variants as shown in Table 3 Table 3 EM783 variant configuration parameters Variant NR_VOLTAGE_CHANNELS NR_CURRENT_CHANNELS NR_GAIN_CHANNELS MC3 1 3 6 MC6 1 6 6 SC 1 1 2 SP 1 2 4 TP 3 3 3 The calibration commands are described below 1 Display Metrology result Table 4 Calibration command display metrology result Field Value Command CDM Description This command displays the metrology results on the serial terminal Response The following metrology parameters are displayed on the serial terminal e RMS Voltage for NR_VOLTAGE_CHANNELS in Volts e RMS Current for NR_ CURRENT_CHANNELS in Amperes e Active Power for NR_ CURRENT_CHANNELS in Watts e Fundamental Reactive Power for NR_CURRENT_CHANNELS in VAR e Energy in Ws accumulated during the previous integration period for NR_CURRENT_CHANNELS e Phase angle for NR_CURRENT_CHANNELS in degrees e Mains frequency in Hz e M783 die temperature in degree Celsius e Duration of the last integration period in seconds e Po
11. sscsesescseeeenscesenecneeseseneeeenens List OF Calo OS acess ccsccccee sectassicacccatscscssscscaecaccasacvexe CONLEIIS wisiviiisieisciitiiiiiiisisiaianiansadenntinnainan Please be aware that important notices concerning this document and the product s described herein have been included in the section Legal information NXP B V 2014 All rights reserved For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 16 January 2014 Document identifier UM10774
12. 14 All rights reserved User Manual Rev 2 0 16 January 2014 14 of 27 NXP Semiconductors U M1 0774 UM10774 3 5 3 3 5 3 1 EM783 Software Development Kit SDK Field Value Bad parameter Incorrect value of offset correction Examples e CSP 6 Calibrate phase correction for channel 6 on MC6 variant e CSP 3H Calibrate high gain channel 3 on MC3 variant 8 Program Offsets into EEPROM Table 11 Calibration command program Offsets Field Value Command CPO Description This command programs the offset values into the EEPROM Response OK Success 9 Program Ranges into EEPROM Table 12 Calibration command program Ranges Field Value Command CPR Description This command programs the range values into the EEPROM Response OK Success Calibration procedure The calibration is performed with the following steps in the order listed below 1 Calibrate offsets of all the voltage channels 2 Calibrate offsets of all the current channels 3 Calibrate voltage ranges of all the voltage channels 4 Calibrate current ranges of all the current channels 5 Calibrate phase correction of all the current channels Calibration of voltage channel offset 1 Power up the EVM 2 Wait for the metrology engine to complete the initialization and display the metrology parameters in the LCD 3 Set the offset parameter for the voltage channel being calibrated to 0 using the CSO command
13. MAX3420E USB controller Hence on the EM783 EVM SUPPORT_MAX3420E and SUPPORT_KWH_PULSER cannot be enabled simultaneously SUPPORT_SSP needs to be defined to enable SUPPORT_MAX3420E SUPPORT_1I2C needs to be defined to enable SUPPORT_LCD SUPPORT_UART_DEBUG needs to be defined to enable SUPPORT_CALIBRATION EM783 temperature compensation UM10774 5 1 5 2 5 2 1 Need for temperature compensation EM783 EVM can be operated over a wide temperature range The performance characteristics of the EVM vary at different temperatures This results in the variation of the accuracy of the metrology measurement output when the EVM is operated at different temperature conditions Temperature compensation is used to improve the accuracy in the metrology measurement output when the EVM is operated at temperatures other than the ambient temperature at which the unit is calibrated Temperature compensation procedure The temperature compensation procedure involves measuring a fixed reference current with the EVM at various temperatures and applying the appropriate correction factor The temperature compensation has to be performed for voltage current and phase angle of all the channels separately Voltage and current compensation The temperature compensation procedure for the voltage channels and the current channels are the same The temperature compensation procedure for one current channel is illustrated in the steps below The setup used
14. UM10774 EM783 Software Development Kit SDK Rev 2 0 16 January 2014 User Manual Document information Info Content Keywords Abstract EM783 SDK User manual Metrology This document is the user manual for the EM783 software development kit NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK Revision history Rev Date Description 2 0 20140116 Updated SDK folder structure in section 2 1 0 20131219 Initial version Contact information For more information please visit http Awww nxp com For sales office addresses please send an email to salesaddresses nxp com UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 2 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 1 Introduction EM783 is the next generation e metering chip with a built in metrology engine EM783 is built around a low power cost effective and industry standard ARM Cortex M0 core The ARM Cortex M0 runs with a speed up to 48 MHz and offers 4 kB of EEPROM 32 kB of flash memory 8 kB of SRAM and various serial peripherals For design flexibility NXP offers multiple variants of EM783 as single channel SC multi channel MC single phase SP and three phase TP The variant chips are e EM783 MC3 e EM783 MC6 e EM783 SC e EM783 SP e EM783 TP The EM783 referen
15. and evaluation purpose only The EVM operates at voltages and currents that can result in electrical shock and fire hazard if used improperly This EVM should only be operated by qualified personnel familiar with the risks and hazards associated with handling high voltages and currents The EVM or its components should not be touched when it is energized Fig 2 Caution Support information Use the following link for additional information on EM783 http Awww nxp com products power_management energy measurement _ics series EM7 83 html For further support on EM783 send an email to em7xx support nxp com References 1 EM783 Metrology Engine API document 2 EM783 EVM User Manual 3 EM783 User Manual 4 EM783 FAQ All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 4 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 2 EM783 evaluation module overview This section gives an overview of the EM783 EVM The EVM includes e EM783 EVM hardware e SDK installer EM783_SDK_ lt x y gt exe The installer contains the following folders under the top level SDK folder as shown in Fig 3 Here lt x y gt indicates the release number Note All paths shown in this document are relative to the top level SDK folder E di em783_sdk E d docs aJ src a Reference applicatio
16. ce design evaluation module EVM includes an SDK package consisting of a reference energy meter application and metrology library in binary format The metrology library provides the interface to the EM783 metrology engine The SDK package is available for download from the NXP website This document describes the EM783 EVM the software development kit and the steps to evaluate the EVM This document also details the calibration procedure for the EVM This document does not describe the application interface provided by the metrology engine library For detailed information on Refer to EM783 metrology engine API 1 EM783 EVM 2 EM783 FAQ 4 1 1 Key applications e Smart plugs and plug meters e Single phase residential meters e DALI DMX and KNX nodes with metering functionality e Industrial sub meters e Power monitors for servers e Smart appliances UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 3 of 27 NXP Semiconductors U M1 0774 UM10774 EM783 Software Development Kit SDK 1 2 Block diagram Cortex M0 4kB 50 MHz EEPROM Metrology Engine with Net 8 kB 32 kB Frequency SRAM Flash Tracking Advanced Peripheral Bus Temperature Sensor 1x UART RS485 IrDA aaa 009758 Fig 1 EM783 block diagram 1 3 Disclaimer 1 4 1 5 This is a prototype for demonstration
17. d the negative peak current for the channel are different then the offset calibration needs to be performed 4 Adjust the value of the offset using the command CSO in the serial terminal until both the positive peak and the negative peak current values are almost the same 5 Program the new offset value into the EEPROM by entering the command CPO in the serial terminal 3 5 3 3 Calibration of voltage range 1 Use the CDM command in the serial terminal to display the metrology results and note down the measured RMS voltage for the channel being calibrated 2 If the error in the measured RMS voltage with respect to the reference meter reported RMS voltage is more than the allowed range then the voltage range calibration needs to be done 3 Use the CSV command to calibrate the voltage channel for the reference RMS voltage 4 Program the new voltage calibration parameter into the EEPROM by entering the command CPR in the serial terminal 3 5 3 4 Calibration of current range 1 Enter the command CDM in the serial terminal to display the metrology results and note down the measured RMS current for the channel being calibrated 2 If the error in the measured RMS current with respect to the reference meter reported RMS current is more than the allowed range then the current range calibration needs to be done 3 Use the CSI command to calibrate the current channel for the reference RMS current 4 Program the new current calibration pa
18. eal correction factor Correction factor estimated using the best fir curve Corrected calibration parameter Phase angle correction factor compensation The temperature compensation procedure for the phase angle correction factor is similar to the procedure for the current and voltage compensation The example calculation for the phase angle correction factor temperature compensation is shown in Fig 11 and Table 15 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 21 of 27 NXP Semiconductors UM10774 UM10774 EM783 Software Development Kit SDK Fig 11 0 00020 0 00015 0 00010 0 00005 0 00000 0 00005 0 00010 0 00015 0 00020 Plot of correction factor for phase angle versus temperature Phase Correction factor Vs Temperature Correction Factor Ideal Correction factor Best Table 15 EM783 temperature compensation example for phase angle PhiL rads 0 002345 Deltaphi1L rads 0 069813 T C 80 70 60 50 40 25 20 10 0 PhiiLm rads Corr_ideal rads Corr_estimated Deltaphiil_comp rads rads 0 002549 0 000204 0 000170 0 069983 0 002501 0 000156 0 000140 0 069953 0 002483 0 000138 0 000110 0 069923 0 002452 0 000107 0 000080 0 069893 0 002416 0 000071 0 000050 0 069863 0 002345 0 000000 0 000005 0 069818 0 002341 0
19. ence application is erased from the flash memory then on power up the SWD pins of EM783 reverts to the default mapping as shown in Table 2 Table 2 Default SWD pin mapping SWD Signal EM783 Pin Name Pin Number SWDIO PO_10 25 SWCLK P0_5 19 4 In this mode the debugger cannot be used to connect to EM783 Use the procedure listed in Section 3 2 to flash the image into EM783 3 5 Calibration of the metrology engine To calibrate the EM783 EVM define the option SUPPORT_CALIBRATION in the file src app inc app_config h The calibration is performed through the EM783 UART interface using serial terminal emulator software running on the PC The steps to perform the calibration are shown in the following sections All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 9 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 3 5 1 Calibration setup 1 Connect the UART serial cable from the connector J12 on the EM783 EVM to the PC 2 Run the serial terminal emulator software 3 Click Setup and select Serial port Set Port to match the COM port to which the UART serial cable is connected Set Baud rate to 57600 Data to 8 bits Parity to none Stop bits to 1 and Flow control to none 4 Enable Local echo option in the serial terminal 5 Connect the EM783 EVM to a reference power supply and a resistive
20. for the calibration is reused to derive the correction factor for the temperature compensation see Section 3 5 3 1 Enclose the EVM in a temperature chamber All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 19 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 2 Set the reference current to 5A the effect of variation in the temperature is more towards lower current Hence set the reference current to about 20 of the range of the current that can be measured with the channel ao Set the temperature within the temperature chamber to 80C A Note down the value of the current reported by the metrology engine for the channel being characterized 5 Repeat steps 2 to 4 by setting the temperature to different values over the entire range in which the EVM is used 6 An example set of measurement data for a current channel at different temperatures from OC to 80C is shown in Table 14 7 Compute the ideal correction factor C_ideal as shown in the table below Plot a curve of the ideal correction factor against the temperature as shown in Fig 10 Current Correction factor Vs Temperature y 0 0428x 1 34155 Correction Factor Ideal Correction factor Best Fig 10 Plot of correction factor for current versus temperature 8 Overlay a best fit curve through
21. ir suppliers be liable to customer for any special indirect consequential punitive or incidental damages including without limitation damages for loss of business business interruption loss of use loss of data or information and the like arising out the use of or inability to use the product whether or not based on tort including negligence strict liability breach of contract breach of warranty or any other theory even if advised of the possibility of such damages Notwithstanding any damages that customer might incur for any reason whatsoever including without limitation all damages referenced above and all direct or general damages the entire liability of NXP Semiconductors its affiliates and their suppliers and customer s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars US 5 00 The foregoing limitations exclusions and disclaimers shall apply to the maximum extent permitted by applicable law even if any remedy fails of its essential purpose 6 3 Trademarks Notice All referenced brands product names service names and trademarks are property of their respective owners NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 24 of 27 NXP Semiconductors UM10774 EM783 Software Development Kit SDK 7
22. isabled the UART interface Define this macro to enable the KWH pulse module SUPPORT_KWH_PULS Enabled or Undefine this macro to disable the KWH pulse 18 ER Disabled disabled module 1000 KWH_PULSE_RATE_D 2000 Sets the pulse rate of the KWH pulse output in 19 EFAULT 2000 3000 number of pulses per KWH of energy Enabled or Define this macro to enable the LCD driver 20 SUPPORT_LCD Enabled disabled Undefine this macro to disable the LCD driver Enabled or Define this macro to enable the MAX3420E driver 21 SUPPORT_MAX3420E Disabled disabled Undefine this macro to disable the MAX3420E driver MAX3420E_INTERRUP Defines the GPIO pin number to which the 22 T_PIN 4 GPIO pin number MAX3420E interrupt pin is connected Enabled or 23 SUPPORT_SC16IS752 Disabled disabled Define this macro to enable the SC161S752 driver Application 24 C16IS752_BAUDRATE 38400 defined Baud rate for the SC16IS752 UART interface SC16IS752_12C_INTER Select 12C interface for communication between 25 FACE 1 1 or0 EM783 and SC161S752 C161S752_SSP_INTER Select SSP interface for communication between 26 FACE 0 1 or0 EM783 and SC161S752 Define this macro to enable the EM783 UART driver Enabled or Undefine this macro to disable the EM783 UART 27 SUPPORT_UART Enabled disabled driver EM783_CONS Standard baud OLE_BAUDRA rates up to 28 UART_BAUDRATE TE 115200 Defines the baud rate for the EM783 UART interface Enabled or Define this macro to enable the 12C driver 29 SUPPORT _12C Enabled di
23. ll rights reserved User Manual Rev 2 0 16 January 2014 13 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK Field Value H High Gain Channel L Low Gain Channel 1 to 6 Channel number MC3 MC6 SC SP TP 1H 1 1H 1H 1L 2 1L 1L 2H 3 2H 2L 4 2L 3H 5 3L 6 reference_rms_cu RMS current obtained from the reference meter in Ampere rrent Response OK Success Bad parameter Incorrect value of offset correction Examples e CSI 1 24 Calibrate channel 1 on MC6 variant to reference RMS current of 24A e CSI 2L 24 Calibrate low gain channel 2 on MC3 variant to reference RMS current of 24A 7 Calibrate phase correction for current channel Table 10 Calibration command calibrate phase correction for current channel Field Value Command CSP Description This command calibrates the phase correction for a current channel The format of the command is CSP lt channel_number gt Parameters channel_number The channel number should be specified as listed in the table below The table uses the following notations H High Gain Channel L Low Gain Channel 1 to 6 Channel number MC3 MC6 SC SP TP 1H 1 1H 1H 1L 2 1L 1L 2H 3 2H 2L 4 2L 3H 5 3L 6 phase correction New phase correction value for the current channel in radian Response OK Success UM10774 All information provided in this document is subject to legal disclaimers NXP B V 20
24. n header files 5 J projects Keilstartup and projectfiles Ji keil Bse Reference application source files E di comps CMSIS source files db cmsis metrology 4 Metrology library headerfile and binaries Di drives __ Peripheral driver source files Fig 3 EM783 SDK folder structure The EVM is equipped with 1 LCD Panel To enable the user to view the metrology results 2 UART Port The UART port on the reference kits must be connected to the host PC using a UART to USB cable This interface can be used for the following a Application firmware flashing via EM783 In System Programming ISP interface Refer to EM783 user manual for more details on ISP interface b Debug messaging c Metrology engine calibration 3 SWD Port To attach SWD debugger module the EVM has been tested with Keil ULINK2 SWD debugger 4 12C Port l2C port is used to connect the LCD to EM783 It is also available at the expansion header 5 SPI Port SPI port is used to connect the ZigBee module to EM783 It is also available at the expansion header 6 USB A USB port is available for PC connectivity 7 RS485 RS485 port is available for multi drop communication This interface can be used to calibrate and test multiple meters connected in parallel UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 5 of 27
25. n the EM783 EVM and the PC Set the switch SW8 to the ON position Power up the EVM SW3 in ON position Run the Flash Magic tool Set the COM port to match the port to which the UART serial cable is connected Set the Baud Rate to 115200 any baud rate up to 115200 can be used Set the Interface to None ISP 0 Inthe Hex File tab browse to the project directory src app projects keillobjs_ lt variant gt and select the file EM783_ lt variant gt hex 3 4 5 6 Set the target to EM783 lt variant gt using the select button 7 8 9 1 11 Click on the Start button to program the image onto the EVM 12 Once the image is flashed set the switch SW8 to the OFF position Evaluating the EM783 EVM EM783 EVM power up 1 Ensure the switch SW8 is set to the OFF position 2 Connect the mains supply to the connectors provided on the front panel of the EVM Refer to EM783 EVM user manual for the connection details 3 Power up the EVM SW3 to ON position 4 EM783 metrology engine initialization messages are displayed on the UART console 5 The metrology results for all the channels are displayed on the LCD screen EM783 EVM display layout This section describes the format of metrology parameters displayed on the LCD panel for all the EM783 variants All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 7 of 27
26. nformation supplied prior to the publication hereof Suitability for use NXP Semiconductors products are not designed authorized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applications Applications that are described herein for any of these products are for illustrative purposes only NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products and NXP Semiconductors accepts no liability for any assistance with applications or UM10774 All information provided in this document is subject to legal disclaimers customer product design It is customer s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer s applications and products planned as well as for the planned application and use of customer s third party c
27. nt and voltage ranges on the serial terminal Response The following ranges are displayed on the serial terminal e Ranges for NR_VOLTAGE_CHANNELS voltage inputs e Ranges for NR_GAIN_CHANNELS current inputs e Phase correction value for NR_GAIN CHANNELS current inputs Fig 9 CDR command output for MC3 variant 4 Set offset correction for current and voltage channels Table 7 Calibration command set offset correction parameter Field Value Command CSO Description This command sets the offset calibration parameter for a channel into the metrology engine The format of the command is CSO lt channel_type gt lt channel_number gt lt offset gt Parameters channel_type V Voltage channel Current channel channel_number The channel number should be input as listed in the table below The table uses the following notations H High Gain Channel L Low Gain Channel 1 to 6 Channel number Voltage channel number must be from 1 to NR_VOLTAGE_CHANNELS Current channel number must be as given in the table below UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 12 of 27 NXP Semiconductors UM10774 UM10774 EM783 Software Development Kit SDK Field Value MC3 MC6 Sc SP TP 1H 1 1H 1H 1L 2 1L 1L 2H 3 2H 2L 4 2L 3H 5 3L 6 Offset New offset value Res
28. ponse OK Success Bad parameter Incorrect value of offset correction Examples e CSO V1 1 Set the offset of the voltage channel 1 to 1 e CSO I1H 1 Set the offset of the high gain current channel 1 to 1 e CSO I2L 3 Set the offset of the low gain current channel 2 to 3 5 Calibrate voltage channel Table 8 Calibration command calibrate voltage range for voltage channel Field Command Description Parameters channel_number reference_rms_vo ltage Response Value CSV This command calibrates the voltage channel The format of the command is CSV lt channel_number gt lt reference_rms_voltage gt Voltage channel number must be a value from 1 to NR_VOLTAGE_CHANNELS RMS voltage obtained from the reference meter in Volts OK Success Bad parameter Incorrect range parameter Examples e CSV 1 230 Calibrate the voltage channel 1 to reference RMS voltage of 230V 6 Calibrate current channel Table 9 Calibration command calibrate current range for current channel Field Command Description Parameters channel_number Value CSI This command calibrates the current channel The format of the command is CSI lt channel_number gt lt reference_rms_current gt The channel number should be specified as listed in the table below The table uses the following notations All information provided in this document is subject to legal disclaimers NXP B V 2014 A
29. rameter into the EEPROM by entering the command CPR in the serial terminal 3 5 3 5 Calibration of phase correction 1 Use the CSP command to calibrate the phase correction for a current channel 2 Verify that the value of the fundamental reactive power Q1 is as close to 0 as possible using the CDM command in the serial terminal 3 Program the new phase correction factor into the EEPROM by entering the command CPR in the serial terminal UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 16 of 27 NXP Semiconductors UM10774 4 EM783 SDK configuration EM783 Software Development Kit SDK The EM783 EVM provides the following interfaces to the external world to communicate with the EM783 1 UART This interface is available at connector J12 and is used for debug messages ISP flashing and calibration of the metrology engine by the reference application 2 USB This interface is available at connector J7 The USB controller MAX3420EETG is connected to EM783 via the SPI interface The reference application provides a SPI driver and a CDC class driver for MAX3420E controller 3 Wireless EM783 EVM also provides wireless connectivity using the NXP JN5148 ZigBee module The ZigBee module is interfaced to the EM783 via the I2C SPI to UART Bridge chip SC16IS752IBS The SDK provides both SPI and I2C drivers to
30. rview u s Evaluating EM783 ccssssessseeeessseeessseeneenees Building the project Flashing the image ccceeesseeeseseeeeeenneeeeeenees Evaluating the EM783 EVM ossee EM783 EVM power Up eeeeseeeeeseeeeeenneeereenees EM783 EVM display layout seee Initialization Message Metrology parameter display cee SWD pin configuration for EM783 0 Calibration of the metrology engine Calibration setup 0 00 eeceeeceeeteeeneeteneeteneereaes Calibration commands eceeeeeeeeteteteeeeees Calibration procedure eceesceeeseteneseterees Calibration of voltage channel offset Calibration of current channel offset Calibration of voltage range cesses Calibration of current range eeeeeeeeeeeeeee Calibration of phase correction c c0cee EM783 SDK configuration csssesseseeeee EM783 temperature compensation 00 008 Need for temperature compensation Temperature compensation procedure Voltage and current compensation 0 Phase angle correction factor compensation Legal information cssseesssseessseenensseeneenees Definitions ce eeeeeeceeceeeceeeeeeeeeeeeeeeesseeeeeeeeaas DISCIAIMENS cseeecccceeecceeseeeeceeeeeeesseceeeeeeaas THADGMANKS se ccccsiacsccsencsesavacececcassesssneteecseasaeareca List Of FIQUIFCS c
31. s as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information 6 2 Disclaimers Limited warranty and liability Information in this document is believed to be accurate and reliable However NXP Semiconductors does not give any representations or warranties expressed or implied as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information In no event shall NXP Semiconductors be liable for any indirect incidental punitive special or consequential damages including without limitation lost profits lost savings business interruption costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligence warranty breach of contract or any other legal theory Notwithstanding any damages that customer might incur for any reason whatsoever NXP Semiconductors aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors Right to make changes NXP Semiconductors reserves the right to make changes to information published in this document including without limitation specifications and product descriptions at any time and without notice This document supersedes and replaces all i
32. sabled Undefine this macro to disable the I2C driver UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 18 of 27 NXP Semiconductors UM10774 EM783 Software Development Kit SDK Sl No 30 31 32 33 Configuration option SUPPORT_SSP SSP_CLOCKSPEED_HZ SSP_USE_CS SSP_CS_GPIO SUPPORT_STACK_CH ECK Default value Valid values Purpose Define this macro to enable the SSP driver Undefine this macro to disable the SSP driver Enabled or disabled Application defined Disabled 1000000 SSP interface clock speed Set this to 1 to use the SSP slave select signal from the controller Set this to 0 to use PO_18 in GPIO mode for slave select GPIO used as chip select for the EM783 SSP interface Application 0 defined Application 18 defined Define this macro to enable stack usage check feature With this option enabled the stack is filled with known pattern STACK_MEM_INIT_PATTERN Exercise the system to ensure the greatest stack depth is achieved Halt the system using debugger and examine the stack memory to determine how much of the stack is used Enabled or Disabled disabled STACK_MEM_INIT_PAT TERN OxBAADFOOD Any pattern Stack memory initialization pattern KWH pulse module uses PO_4 for KWH pulse output this is also the pin used as the interrupt pin for
33. sitive Peak Voltage for NR_VOLTAGE_CHANNELS in volts UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 10 of 27 NXP Semiconductors U M1 0774 Field Value e Negative Peak Voltage for NR_VOLTAGE_CHANNELS in volts e Positive Peak Current for NR_CURRENT_CHANNELS in Amperes e Negative Peak Current for NR_ CURRENT_CHANNELS in Amperes Channel IL 2H 3L Frequency 5 Fig 7 CDM command output for MC3 variant 2 Display Offsets Table 5 Calibration command display offset corrections Field Value Command CDO Description This command displays the values of the offset corrections for all the current and the voltage channels Response The following offset values are displayed on the serial terminal e NR_VOLTAGE_CHANNELS offsets for the voltage inputs e NR_GAIN_CHANNELS offsets for the current inputs Fig 8 CDO command output for MC3 variant UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 11 of 27 NXP Semiconductors U M1 0774 EM783 Software Development Kit SDK 3 Display Ranges Table 6 Calibration command display ranges Field Value Command CDR Description This command displays the calibration parameters peak to peak curre
34. the points of the ideal correction factor points In the above example the curve is defined by y 0 0428x 1 3415 9 Compute the new calibration factor using the correction factor as shown Table 14 UM10774 All information provided in this document is subject to legal disclaimers NXP B V 2014 All rights reserved User Manual Rev 2 0 16 January 2014 20 of 27 NXP Semiconductors UM10774 UM10774 5 2 2 EM783 Software Development Kit SDK Table 14 EM783 temperature compensation example for current I1L A 5 I1Lpp 3 04876 T C l1Lm A 80 4 91 70 4 924 60 4 9286 50 4 94128 40 4 99134 25 5 20 5 034 10 5 052 0 5 0699 Following notations are used in this table Notation Formula HL 11Lpp T liLm Corr_ideal I4L 11Lm 100 11L Corr_estimated 0 0428 T 1 3415 11Lpp_comp liLpp 1 C Corr_ideal Corr_estimated liLpp_ comp 1 832994 2 082500 3 112250 1 543461 1 654500 3 099202 1 448687 1 226500 3 086153 1 188356 0 798500 3 073104 0 173501 0 370500 3 060056 0 000000 0 271500 3 040483 0 675407 0 485500 3 033958 1 029295 0 913500 3 020910 1 378725 1 341500 3 007861 Meaning Test current applied to channel I1L to derive the temperature compensation formula Calibration factor for the channel I1L obtained after calibration Temperature to which the EVM is subjected to in degree Celsius Measured current in A from channel I1L at the set temperature Id
35. ustomer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s applications or products or the application or use by customer s third party customer s Customer is responsible for doing all necessary testing for the customer s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer s third party customer s NXP does not accept any liability in this respect Export control This document as well as the item s described herein may be subject to export control regulations Export might require a prior authorization from competent authorities Evaluation products This product is provided on an as is and with all faults basis for evaluation purposes only NXP Semiconductors its affiliates and their suppliers expressly disclaim all warranties whether express implied or statutory including but not limited to the implied warranties of non infringement merchantability and fitness for a particular purpose The entire risk as to the quality or arising out of the use or performance of this product remains with customer In no event shall NXP Semiconductors its affiliates or the
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