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Freescale Semiconductor
Document Number: WCT1012V30RTDUG
User’s Guide Rev. 0, 09/2015
WCT1012 15W Single Coil TX V3.0 Runtime
Debugging User’s Guide
1 Introduction
Freescale provides the FreeMASTER GUI tool
for WCT1012 Medium Power wireless charging
solution. The GUI based on the FreeMASTER
tool can be used to fine tune the parameters in
running state. For the operations of setting up the
FreeMASTER connection, see the WCT1012
15W Single Coil TX V3.0 Reference Design
System User’s Guide (WCT1012V30SYSUG).
Contents
1 Introduction 1
2 Runtime Tuning and Debugging 2
3 Configuration Structure Reference 14
© 2015 Freescale Semiconductor, Inc. All rights reserved.
_______________________________________________________________________
2 Runtime Tuning and Debugging
2.1 NVM parameters
This chapter describes the configuration and tuning of the Wireless Charging Transmitter (WCT) library.
The main configuration structure of the library is initially stored in the Flash memory and it is copied from
there to the NvmParams structure in RAM. The initialization data for the Flash-memory structure are
stored in the EEdata_FlashDefaults.asm file.
The WCT GUI based on the FreeMASTER tool can be used to fine tune the parameters at runtime. The
same GUI may also be used to generate the assembler initialization data for the Flash-based configuration.
Alternatively, the WCT GUI may also be used to trigger the application to back up the actual RAM
content of the data structure to Flash.
The WCT GUI is prepared for the following application:
• 15W_MP/example/wct1012.pmp
Section 3 “Configuration Structure Reference” provides detailed information about each configuration
parameter. The same reference information is also available directly in the GUI tool where the parameters
can be changed at runtime.
2.1.1 Runtime access to NVM parameters
As outlined in the previous sections, the WCT GUI based on FreeMASTER tool can be used to read and
modify the parameters at runtime. Parameters are modified immediately, so any change in the operation of
the Wireless Charging system can be evaluated instantly.
The GUI also enables to restore all the configuration parameters to their default values or synchronize the
configuration in GUI with board values by pressing a single button.
The parameters are split to several tabs in the GUI view:
• System parameters
• Coil Parameters
• Calibration
To make the fine-tuned configuration values permanent and default for the next application build, the
whole structure can be exported into assembler syntax of initialization data block. The generated data can
be put to the EEdata_FlashDefaults.asm file directly and used as a new default configuration set.
In addition to actual configuration values, the GUI also calculates proper checksum values to make the
data block valid for the Wireless Charging library.
The exported initialization data block is available on the NVM Raw tab in the GUI.
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Figure 1 WCT GUI (1)
Figure 2 WCT GUI (2)
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2.2 Tuning and debugging
The library is used together with the FreeMASTER visualization tool to calibrate input values and to
observe behavior of the Wireless Charging transmitter. The FreeMASTER tool connects to the target
board by using the UART or JTAG, communication interface.
2.2.1 Data visualization
The FreeMASTER tool enables visualization of any variables or registers in the application running on the
target system. This feature is particularly useful with Wireless Charging application to observe voltage
and currents in real time by using a graphical representation.
The FreeMASTER project file which comes in the Library package contains pre-configured scope views
with the most frequently used runtime parameters. The graphs and views can be easily extended by more
parameters or user-defined data.
Figure 3 Data visualization
2.2.2 Debugging console
In addition to FreeMASTER visualization, the WCT library provides an option to continuously dump selected
debugging information to the user console over the UART interface. The debug messages are sent to UART
any time an important event occurs, if the appropriate message type is enabled.
Be aware that the console UART port must be different from the UART port used by the FreeMASTER
communication. If only one UART port is available, consider the use of an alternative communication
interface for the FreeMASTER connection. Next to UART, the FreeMASTER also supports CAN or JTAG
cable interface.
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There is one UART on WCT1012, so only one of debug console and FreeMaster using SCI can work at a time.
1) If SCI is used for debugging console in MP demo, the settings are as follows:
#define DEBUG_CONSOLE_QSCI0 TRUE // We are using Peripheral QSCI0 for diagnostics
The macro is defined in example->wct1012–> wct_hal_cfg.h.
2) If OSJTAG is used to link Freemaster through SCI, some changes are needed. These macros listed
are defined in example –> wct1012–>hal–> freemaster_cfg.h.
#define FMSTR_USE_SCI 1 /* To select SCI communication interface */
#define FMSTR_USE_JTAG 0 /* 56F8xxx: use JTAG interface */
Note: Only one of macro between DEBUG_CONSOLE_QSCI0 and FMSTR_USE_SCI can be TRUE at
a time.
2.3 Calibration
The library behavior and its parameters should be calibrated before the library can be successfully used.
The calibration procedure consists of four steps, namely, input voltage calibration, input current
calibration, characterization parameters calibration, and normalization parameters calibration. All the
steps require low power disabled, touch disabled, and library running in debug mode except normalization
parameters calibration.
All the calibration steps are used to get accurate power loss for Foreign Object Detection (FOD). Power
loss can be calculated by the following equation. If P_Loss is bigger than threshold, there must be a
foreign object.
P_Loss = T_IN – T_Loss – R_IN
• Input Voltage Calibration and Input Current Calibration are used to get accurate T_IN.
• Characterization Parameters Calibration is used to estimate T_Loss.
• Normalization Parameters Calibration is used to get accurate R_IN.
Figure 4 Calibration
Note: Before starting calibration, read all the values to the NVM data. Click the Read button of Common
for all on the System Params page, Coil Params page, and Calibration page.
WCT1012 15W Single Coil TX V3.0 Runtime Debugging User’s Guide, Rev. 0, 09/2015
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Figure 5 Reading NVM value
2.3.1 Input voltage calibration
The process of input voltage calibration is as follows:
1. Before the calibration, set LOW_POWER_MODE_SUPPORTED to FALSE in the example code.
Then, the MCU runs at full speed even without charging, and the FreeMASTER GUI can respond
quickly when the user performs FOD calibration in debugging mode.
• Before TX is powered on, ensure that the RX is removed and load is disconnected.
• The calibration process of the input voltage requires library to be running in debug mode,
and without RX and load.
• Use the FreeMASTER GUI to do the calibration, and save the constant to flash.
2. When TX is powered on, measure the input voltage of the VINA signal by a multimeter, and write
it to Step 5) in the following window on FreeMASTER GUI.
Figure 6 Input voltage calibration
3. Read out the input Voltage Calibration Constant on the Calibration page of the FreeMASTER
GUI to ensure that it is saved successfully.
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Figure 7 Read voltage calibration constant
2.3.2 Input current calibration
The process of input current calibration is as follows:
1. Power on the wireless charging TX board without load connected.
The calibration process of the input current requires the library to be running in debug mode, and
without RX on.
2. Ensure that RX is removed. Add electronic load or resistors between VINA and Ground to draw
current.
3. Change load current from 50 mA to 1600 mA. Record Actual Current measured by a multimeter.
Use FreeMASTER GUI to do the calibration, and save the constant to flash.
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Figure 8 Input current calibration
4. Read out the Input Current Calibration Constant on the Calibration page of the FreeMASTER
GUI to ensure that it is saved successfully. Before the following FOD calibration, disconnect
FreeMASTER, download new parameters to TX and reset the TX board.
Figure 9 Read input current calibration constant
Connect load after step3
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2.3.3 FOD calibration
The process of FOD calibration is as follows:
1. The calibration process of foreign object detection algorithm requires library running in debug
mode and finished calibration of the Input Voltage and Input Current. The calibration must be
done without RX and load.
• Follow instruction of the Input Voltage Calibration process.
• Follow instruction of the Input Current Calibration process.
Note: There are three control types in the middle power transmitter, half bridge frequency control,
full bridge phase shift control, and full bridge control. Calibration should be done three times for
three working states.
2. For half bridge frequency control, set Control Type to 0. Read coil current and input Power by
setting the coil frequency range from 205 KHz to 115 KHz. On the FreeMASTER GUI, perform
the following steps to get FOD coefficients, CA5, CA6, CA7.
Figure 10 FOD calibration of half bridge frequency control
3. Read out the Power Loss Characterization Parameters on the Calibration page of the
FreeMASTER GUI to ensure that it is saved successfully.
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Figure 11 Read FOD calibration constant of half bridge frequency control
4. For full bridge phase control, set Control Type to 1. Read the coil current and input Power by
setting the working phase range from 26% to 100%. On the FreeMASTER GUI, perform the
following steps to get FOD coefficients, CA5, CA6, CA7.
Figure 12 FOD calibration of full bridge phase control
5. Read out the Power Loss Characterization Parameters on the Calibration page of the
FreeMASTER GUI to ensure that it is saved successfully.
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Figure 13 Read FOD calibration constant of full bridge phase control
6. For full bridge frequency control, set Control Type to 2. Read coil current and input Power by
setting the working phase range from 200 kHz to 125 kHz. On the FreeMASTER GUI, perform the
following steps to get FOD coefficients, CA5, CA6, CA7.
Figure 14 FOD calibration of full bridge frequency control
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7. Read out the Power Loss Characterization Parameters on the Calibration page of the
FreeMASTER GUI to ensure that it is saved successfully.
Figure 15 Reading FOD calibration constant of full bridge frequency control
8. Read out all parameters in the FreeMASTER GUI and use new coefficients in program, reset the
MCU.
2.3.4 FOD normalization
The FOD normalization is to equalize the power loss curve, at which the loss value goes high as the load
increasing, and it may be higher than the threshold even no foreign object is present. To resolve the issue,
Freescale provides the normalization tool through the FreeMASTER GUI to fine-tune the FOD of the
performance customer board.
The process of FOD normalization is as follows:
1. Make sure that the input voltage, input current, and FOD calibration are done.
2. Follow the normalization steps on the FreeMASTER GUI as shown in the following figure. Before
the test, reset the parameter and exit debug mode. Do the test with a standard calibrated Qi 1.1 RX,
like TPR#5. The load range is from 50 mA to 1000 mA.
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Figure 16 FOD normalization
3. After the steps above on the GUI are finished, read out Power Loss Characterization
Parameters on the Calibration page of the FreeMASTER GUI to ensure that it is saved
successfully.
Figure 17 Read FOD normalization constant
Note: FOD normalization in Section 2.3.4 is for low power RX (5W). As for Middle Power RX,
normalization is not necessary, because MP FOD based on power loss method is with online calibration
for accuracy.
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3 Configuration Structure Reference
3.1 System parameters
LED1 Operation ON/OFF Bitfield
Details:
This parameter configures On/Off behavior of LED1 diode:
Bit0 – This parameter, when set, indicates LED1 should be ON in the Initialization state.
Bit1 – This parameter, when set, indicates LED1 should be ON in the STANDBY state.
Bit2 – This parameter, when set, indicates LED1 should be ON in the Power Xfer state.
Bit3 – This parameter, when set, indicates LED1 should be ON in the Device Charged state.
Bit4 – This parameter, when set, indicates LED1 should be ON in the FOD Fault state.
Bit5 – This parameter, when set, indicates LED1 should be ON in the Device Fault state.
Bit6 – This parameter, when set, indicates LED1 should be ON in the System Fault state.
Bit7 – This parameter, when set, indicates LED1 should be ON in the NVM Fault state.
Bit8 – This parameter, when set, indicates LED1 should be ON in the Power Limit state.
Bit9 – This parameter, when set, indicates LED1 should be ON for the LED ON diagnostic cmd.
Bit10 – This parameter, when set, indicates LED1 should be ON for the LED OFF diagnostic cmd.
Default Value:
0x00F1
Member:
NvmParams.SystemParams.LedOperation.LedParams[0].wLedOnOffStateBitfield.all
LED1 Operation Blink Bitfield
Details:
This parameter configures Blinking behavior of LED1 diode:
Bit0 – This parameter, when set, indicates LED1 should Blink in the Initialization state.
Bit1 – This parameter, when set, indicates LED1 should Blink in the STANDBY state.
Bit2 – This parameter, when set, indicates LED1 should Blink in the Power Xfer state.
Bit3 – This parameter, when set, indicates LED1 should Blink in the Device Charged state.
Bit4 – This parameter, when set, indicates LED1 should Blink in the FOD Fault state.
Bit5 – This parameter, when set, indicates LED1 should Blink in the Device Fault state.
Bit6 – This parameter, when set, indicates LED1 should Blink in the System Fault state.
Bit7 – This parameter, when set, indicates LED1 should Blink in the NVM Fault state.
Bit8 – This parameter, when set, indicates LED1 should Blink in the Power Limit state.Bit9 – This parameter, when
set, indicates LED1 should Blink for the LED ON diagnostic cmd.
Bit10 – This parameter, when set, indicates LED1 should Blink for the LED OFF diagnostic cmd.
Default Value: 0xC104
Member:
NvmParams.SystemParams.LedOperation.LedParams[0].wLedBlinkStateBitfield.all
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LED2 Operation ON/OFF Bitfield
Details:
This parameter configures On/Off behavior of LED2 diode:
Bit0 – This parameter, when set, indicates LED2 should be ON in the Initialization state.
Bit1 – This parameter, when set, indicates LED2 should be ON in the STANDBY state.
Bit2 – This parameter, when set, indicates LED2 should be ON in the Power Xfer state.
Bit3 – This parameter, when set, indicates LED2 should be ON in the Device Charged state.
Bit4 – This parameter, when set, indicates LED2 should be ON in the FOD Fault state.
Bit5 – This parameter, when set, indicates LED2 should be ON in the Device Fault state.
Bit6 – This parameter, when set, indicates LED2 should be ON in the System Fault state.
Bit7 – This parameter, when set, indicates LED2 should be ON in the NVM Fault state.
Bit8 – This parameter, when set, indicates LED2 should be ON in the Power Limit state.
Bit9 – This parameter, when set, indicates LED2 should be ON for the LED ON diagnostic cmd.
Bit10 – This parameter, when set, indicates LED2 should be ON for the LED OFF diagnostic cmd.
Default Value:
0x000D
Member:
NvmParams.SystemParams.LedOperation.LedParams[1].wLedOnOffStateBitfield.all
LED2 Operation Blink Bitfield
Details:
This parameter configures Blinking behavior of LED2 diode:
Bit0 – This parameter, when set, indicates LED2 should Blink in the Initialization state.
Bit1 – This parameter, when set, indicates LED2 should Blink in the STANDBY state.
Bit2 – This parameter, when set, indicates LED2 should Blink in the Power Xfer state.
Bit3 – This parameter, when set, indicates LED2 should Blink in the Device Charged state.
Bit4 – This parameter, when set, indicates LED2 should Blink in the FOD Fault state.
Bit5 – This parameter, when set, indicates LED2 should Blink in the Device Fault state.
Bit6 – This parameter, when set, indicates LED2 should Blink in the System Fault state.
Bit7 – This parameter, when set, indicates LED2 should Blink in the NVM Fault state.
Bit8 – This parameter, when set, indicates LED2 should Blink in the Power Limit state.
Bit9 – This parameter, when set, indicates LED2 should Blink for the LED ON diagnostic cmd.
Bit10 – This parameter, when set, indicates LED2 should Blink for the LED OFF diagnostic cmd.
Default Value: 0x0102
Member:
NvmParams.SystemParams.LedOperation.LedParams[1].wLedBlinkStateBitfield.all
Fault Blink Rate (ms)
Details:
WCT1012 15W Single Coil TX V3.0 Runtime Debugging User’s Guide, Rev. 0, 09/2015
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This parameter represents the period of time used to establish a blink rate for any LED in a SYSTEM FAULT or
DEVICE FAULT condition.
Default Value:
200
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.LedOperation.wFaultBlinkRateMs
FOD Fault Blink Rate (ms)
Details:
This parameter represents the period of time used to establish a blink rate for any LED in a FOD FAULT condition.
Default Value:
200
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.LedOperation.wModFaultBlinkRateMs
Operational State Blink Rate (ms)
Details:
This parameter represents the period of time used to establish a blink rate for any LED when the system is in a
non-fault state.
Default Value: 2000
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.LedOperation.wOpStateBlinkRateMs
Delay At Power-Up (ms)
Details:
This parameter can be used to “hold” the state of the LED(s) following initial power-up of the system.
Default Value:
1000
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.LedOperation.wDelayAtPowerUpMs
Default PWM Dead Time (ns)
Details:
This parameter defines the default dead time that is used for PWM outputs when configured for use with a standard
FET driver.
Default Value: 0
Min Value:
0
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Max Value: 65535
Member:
NvmParams.SystemParams.OpStateParams.wPwmDeadTimeNs
TX Max Power Class
Details:
This parameter defines the Power Class that the Transmitter reports to the Receiver, where the value is
used as the exponent in the calculation of the reported power ranges (Typically set to '1' for Medium
Power).
Default Value: 1
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.OpStateParams.wTransmitterPowerClass
TX Max power(W)
Details:
This parameter defines the maximum aggregate power available (in Watts) for all channels supported on
the Transmitter. A fraction of this power is delivered to each supported channel, the value of which is
determined following Power Negotiation.
Default Value: 15
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.OpStateParams.wTransmitterMaxPower
Transmitter Default Channel Power (W)
Details:
This parameter defines the initial budgetary power (in Watts) reported to each channel in the system. The
sum of the budgetary power reported to each channel shall not exceed the MAX power defined above.
Default Value: 15
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.OpStateParams.wTransmitterDefaultChannelPower
ManufacturerCodeMsb
Details:
This parameter defines the Manufacture ID most significant byte.
Default Value: 0
Min Value:
0
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Max Value: 65535
Member:
NvmParams.SystemParams.OpStateParams.ManufacturerCodeMsb
ManufacturerCodeLsb
Details:
This parameter defines the Manufacture ID least significant byte.
Default Value: 0
Min Value:
0
Max Value:
65535
Member:
NvmParams.SystemParams.OpStateParams.ManufacturerCodeLsb
Power Xfer Control Bitfield
Details:
Bit0 –Force Rail Control when enabled
Bit12 –Device 1 enable when set.
Default Value:
0x1000
Member:
NvmParams.SystemParams.OpStateParams.PowerControl
WPC Diagnostics Bitfield
Details:
Bit0 – Sends PID status to Console when enabled.
Bit1 – Sends verbose PID info to Console when enabled.
Bit2 – Sends operational status to Console when enabled.
Bit3 – Sends verbose operational status to Console when enabled.
Bit4 – Sends operational state to Console when enabled.
Bit5 – Sends Comm status to Console when enabled.
Bit6 – Sends received packet channel to Console when enabled.
Bit7 – Sends Auto-baud reference count to Console when enabled.
Bit8 – Sends PLD status to Console when enabled.
Bit9 – Sends Analog Ping status to Console when enabled.
Bit14 – This parameter determines whether or not an audible tone is generated when power transfer is stopped.
Bit15 – This parameter determines whether or not an audible tone is generated when power transfer is initiated.
Default Value:
0xC005
Member:
NvmParams.SystemParams.OpStateParams.WpcDiagnostics
WPC Protections Bitfield
Details:
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Bit0 – This parameter, when set, forces the primary to cease power transfer if the reported secondary version is not
greaterBit1 – This parameter, when set, forces a cessation of Power Xfer state when the Rectified Power packet is
not received.
Bit1 - This parameter, when set, forces the primary to cease power transfer if the reported secondary version is not
greater than or equal to the version of the primary device.
Bit2 – This parameter, when set, disables the use of Analog Ping.
Bit3 - This parameter, when set, forces the selection of the FOD bin specified in the following bits.
Bit4-Bit7 -
These bit selections represent the FOD bin specified when the FOD Override bit is TRUE.
Bit8 -
This parameter, when set, forces entry into Power Xfer if the Negotiation fails in an attempt to
continue operation.
Bit 9-
This parameter, when set, forces the use of a 15W power contract when Negotiation fails and the override bit
is set.Default Value:
0x000A
Member:
NvmParams.SystemParams.OpStateParams.WpcProtections
3.2 Operation parameters
Ping Frequency (Hz)
Details:
This parameter defines the coil frequency to be used during Ping operations (device detection).
Default Value:
175000
Min Value:
0
Max Value:
20000
Member:
NvmParams.OpParams[0].OpStateParams.dwPingFrequency
Ping Pulse Duration (ms)
Details:
This parameter defines the amount of time the Ping frequency should be applied while waiting for device detection.
Default Value:
65
Min Value:
0
Max Value:
65535
Member:
NvmParams.OpParams[0].OpStateParams.wPingPulseDurationTimeMs
Ping Interval (ms)
Details:
This parameter defines the amount of time between attempts to Ping the secondary for device detection.
Default Value:
400
Min Value:
0
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Max Value: 65535
Member:
NvmParams.OpParams[0].OpStateParams.wPingIntervalMs
Frequency (Hz)
Details:
This parameter defines the coil frequency to be used during Analog Ping operations (presence detection).
Default Value:
175000
Min Value:
0
Max Value:
4294967295
Member:
NvmParams.OpParams[0].OpStateParams.dwAnalogPingFrequency
Min Coil Current (ADC counts)
Details:
This parameter defines the threshold below which an Analog Ping has detected a fault in the resonant tank or coil
drive circuit. If the ADC count is not greater than this value, the unit shuts down with a coil fault.
Default Value:
5
Min Value:
0
Max Value:
65535
Member:
NvmParams.OpParams[0].OpStateParams.wAnalogPingMinCoilCurrentThreshold
Coil Current Threshold (% change)
Details:
This parameter defines the threshold above which an Analog Ping may have detected a changed in device presence.
Default Value:
5
Min Value:
0
Max Value:
65535
Member:
NvmParams.OpParams[0].OpStateParams.wAnalogPingCoilCurrentThreshold
Duty Cycle (%)
Details:
This parameter defines the duty cycle to be used during Analog Ping operations.
Default Value:
50
Min Value:
0
Max Value:
255
Member:
NvmParams.OpParams[0].OpStateParams.byAnalogPingDutyCycle
Pulse Duration (# cycles)
Details:
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