ST UM2313 User manual

November 2017
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www.st.com
UM2313
User manual
Getting started with the STSW-GLA001V1 software package for
the STEVAL-GLA001V1 evaluation board based on STM32Cube
Introduction
The STSW-GLA001V1 firmware is designed to be used with the STEVAL-GLA001V1 insulated AC
switch control evaluation board to evaluate its embedded TRIACs and AC switches, implementing
different control modes.
The firmware is developed from the STM32Cube embedded software libraries for STM32F0 series
using the IAR Embedded Workbench for ARM.
The firmware also lets you interact with the STEVAL-GLA001V1 hardware user interface and allows the
configuration of some parameters using a PC user interface.
Thanks to the dynamic storage of the configuration parameters in a dedicated section of the Flash
memory embedded in the STM32 microcontroller, you can change any parameter any time without the
need of compiling and programming the MCU via third-party tools.

Contents
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Contents
1STSW-GLA001V1 firmware structure.............................................5
1.1 Overview...........................................................................................5
1.2 Architecture.......................................................................................5
1.3 Parameters........................................................................................6
1.4 Variables...........................................................................................6
1.5 Parameters and variables stored in the MCU Flash memory............6
2System setup guide.........................................................................9
2.1 Hardware configuration and board setup ..........................................9
2.1.1 Programming the NUCLEO-F030R8 board using a binary file .......... 9
2.1.2 Programming the NUCLEO-F030R8 board using a preconfigured
source project................................................................................................... 12
2.2 STEVAL-GLA001V1 operating modes............................................13
2.2.1 STSW-GLA001V1 control mode detection....................................... 16
2.2.2 ZVS signal synchronization with Vmains zero voltage crossing ...... 16
2.2.3 ON/OFF pulse basic/timer control mode.......................................... 18
2.2.4 Phase control mode.......................................................................... 22
2.2.5 ZVS signal delay measurement ....................................................... 24
2.2.6 User interface ................................................................................... 25
3Revision history ............................................................................32

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List of tables
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List of tables
Table 1: Stored parameters and variables..................................................................................................7
Table 2: Factory values for td_buffer..........................................................................................................8
Table 3: State machine fault codes ..........................................................................................................15
Table 4: STEVAL-GLA001V1 operating modes: analog input and digital level........................................16
Table 5: STEVAL–GLA001V1 evaluation board: user interface command list ........................................30
Table 6: Document revision history ..........................................................................................................32

List of figures
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List of figures
Figure 1: System architecture.....................................................................................................................5
Figure 2: STEVAL-GLA001V1 evaluation board connected to NUCLEO-F030R8 board via X-NUCLEO-
IHM09M1 expansion board.........................................................................................................................9
Figure 3: NUCLEO device on Windows OS .............................................................................................10
Figure 4: ST-LINK utility tool window after bin file opening......................................................................11
Figure 5: ST-LINK utility tool Target menu and Program command ........................................................11
Figure 6: ST-LINK utility tool download window .......................................................................................12
Figure 7: STSW-GLA001V1 firmware –Project workspace on IAR™ .....................................................12
Figure 8: STSW-GLA001V1 firmware –IAR workspace configuration selection.....................................13
Figure 9: STSW-GLA001V1 firmware –IAR workspace Make icon.........................................................13
Figure 10: STSW-GLA001V1 firmware –IAR workspace Download and Debug icon.............................13
Figure 11: STSW-GLA001V1 state machine............................................................................................14
Figure 12: ZVS delay principle..................................................................................................................17
Figure 13: ON/OFF control in basic/timer mode with pulse gate command timing diagram....................18
Figure 14: ON/OFF control in basic/timer mode with pulse gate command timing diagram with td_zvs >
0................................................................................................................................................................19
Figure 15: ON/OFF control in basic/timer mode with pulse gate command timing diagram with td_zvs <
0................................................................................................................................................................20
Figure 16: ON/OFF basic mode control with DC gate command timing diagram ....................................21
Figure 17: ON/OFF timer mode control with DC gate command timing diagram.....................................21
Figure 18: Phase control timing diagram..................................................................................................22
Figure 19: Phase control timing diagram with td_zvs > 0.........................................................................23
Figure 20: Phase control timing diagram with td_zvs < 0.........................................................................24
Figure 21: ZVS delay measurement - oscilloscope capture.....................................................................25
Figure 22: HyperTerminal: new connection window.................................................................................26
Figure 23: HyperTerminal: port settings ...................................................................................................26
Figure 24: Tera Term: new connection menu...........................................................................................27
Figure 25: Tera Term: setup menu...........................................................................................................28
Figure 26: Tera Term: setup menu parameters........................................................................................28
Figure 27: Tera Term: command list.........................................................................................................29
Figure 28: Tera Term: command list sample view (white background and black font) ............................29

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STSW-GLA001V1 firmware structure
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1 STSW-GLA001V1 firmware structure
1.1 Overview
The STSW-GLA001V1 firmware features:
Based on the STM32Cube embedded software libraries
Support for the NUCLEO-F030R8 board
Configuration and independent control of three TRIACs and AC switches embedded in
the STEVAL-GLA001V1 evaluation board:
On/Off control (DC and pulse modes)
Phase control mode
Timer mode
Hardware user interface via push-buttons and switches
Automatic mains frequency detection at switch-on
PC user interface through a serial terminal as Windows HyperTerminal or Tera Term
to:
configure the firmware parameters
monitor the main firmware variables
control command lines (i.e., start and stop commands)
1.2 Architecture
The STSW-GLA001V1 firmware
a
for the STEVAL-GLA001V1 evaluation board is based on
the STM32Cube HAL peripheral drivers and supports different operating modes for AC
switch control.
Figure 1: System architecture
a
Contact your local STMicroelectronics sales office to obtain the source code

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The STSW-GLA001V1 firmware consists of a list of functions that allow the user to
interface with the code variables and functions which manage and implement the different
evaluation board operating modes
a
:
AC_Switch_Control_Lib_Interface_Methods.c file: contains the interfacing
functions used by the firmware
User_Methods.c file: contains the methods the user has to refer to for writing his own
program
AC_Switch_Control_Lib.c file: contains all the functions that implement the operating
modes
AC_Switch_Control_Tasks.c file: contains the MediumFrequencyTask() and
theLowFrequencyTask() functions which calls the operating mode functions
The MediumFrequencyTask() function is executed at the SYSTICK frequency (i.e. 1
kHz).
The LowFrequencyTask() function is executed at the mains frequency (50/60 Hz), if the
ZVS detection circuit is used; otherwise, the LowFrequencyTask() function is not
executed.
1.3 Parameters
The STSW-GLA001V1 firmware contains two types of parameters defined in the
AC_Switch_Control_param.h file:
Default parameters: used for the firmware variable initialization/reset.
Firmware configuration parameters: used to set the firmware configuration
parameters (i.e., the minimum and maximum values for the system variables).
When the user wants to change a parameter value, the firmware has to be compiled and
downloaded in the MCU Flash memory using the IAR Embedded Workbench IDE.
1.4 Variables
The AC switch control firmware variables are defined in the AC_Switch_Control_Vars_t
structure contained in the AC_Switch_Control_Lib.h file.
You may not directly access this structure, but you can use the interfacing functions
included in the user project under the AC_Switch_Control_Lib_Interface_Tasks.h
header file.
1.5 Parameters and variables stored in the MCU Flash memory
The firmware stores the set of variables and parameters listed in Table 1: "Stored
parameters and variables" in the MCU Flash memory whenever one of them is changed
and the current machine state is GATE_CONTROL_AVAILABLE_IDLE.
Then, the following two cases should be considered:
The data is changed during the GATE_CONTROL_AVAILABLE_IDLE state: it
causes the data set to be saved in the Flash memory. During this state, data
modification is taken into account in a very short time. Data storage process starts
approximately 1 ms after the end of data modification and ends after about 25 ms
a
Refer to Section 2.2: "STEVAL-GLA001V1 operating modes" for further details.

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During this process, do not switch the system off to avoid data loss.
The data is changed in a state different from GATE_CONTROL_AVAILABLE_IDLE:
in this case, the store request is activated and the storage process is only performed,
when the state is GATE_CONTROL_AVAILABLE_IDLE.
To avoid data loss, do not switch the system off before reaching the
GATE_CONTROL_AVAILABLE_IDLE state.
The stored values are reloaded at board restart.
If errors occur during the erasing/writing process, the variables stored in the Flash memory
are corrupted and the firmware will restore them to the factory values on the next board
restart.
The user can also manually store data by typing the command store(data) in the serial
terminal (refer to Section 2.2.6: "User interface" for further details).
To avoid data loss, call this function before switching the board off.
Table 1: Stored parameters and variables
Description
Name
Unit
Range
Factory value
ZVS available
zvs_hw
N/A
0 or 1
1
Push button pressure
delay
PBTlow
ms
100 to 500
100
ZVS_delay
td_ZVS
μs
–MainsPeriod/4 to
MainsPeriod/4
0
Pulse time
tp
μs
10 to MainsPeriod/2
5000
Step for pulse time
changing after a tp+
or tp- push button
pressure
tp_step
μs
10 to 1000
1000
Number of steps for
soft-start and soft-
stop
soft_start_stop_n_step
N/A
5 to 100
10
On-time (Timer mode)
OnTime
s
0 to 10000
5
Step for on-time
setting
OnTime_step
s
1 to 10
1
Margin before next
cycle
ZCS_margin
μs
100 to 1000
100
Number of elements
for td buffer
N_td
N/A
5 to 100
20
Minimum td delay
td_min
μs
0 to (td_max-1)
0

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Description
Name
Unit
Range
Factory value
Maximum td delay
td_max
μs
(td_min+1) to
MainsPeriod/2-
ZCS_margin
MainsPeriod/2-
ZCS_margin
Turn-on delay buffer
td_buffer[N_td]
μs
td_min to td_max
Refer to Table 2:
"Factory values for
td_buffer"
Table 2: Factory values for td_buffer
1
2
3
4
…
20
MainsPeriod/40
MainsPeriod/20
3·MainsPeriod/40
MainsPeriod/10
…
MainsPeriod/2

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2 System setup guide
2.1 Hardware configuration and board setup
To use the STSW-GLA001V1 firmware, you need a NUCLEO-F030R8 board and a
STEVAL-GLA001V1 evaluation board.
The two boards are connected through the X-NUCLEO-IHM09M1 expansion board, which
acts as an adapter between a standard ST morpho connector and a 34-pin connector
usually mounted on ST evaluation boards.
a
The user has to ensure that SB16 and the SB50 jumpers on the
NUCLEO-F030R8 board are closed.
Figure 2: STEVAL-GLA001V1 evaluation board connected to NUCLEO-F030R8 board via
X-NUCLEO-IHM09M1 expansion board
The NUCLEO-F030R8 board can be programmed using a binary file or a pre-configured
project.
2.1.1 Programming the NUCLEO-F030R8 board using a binary file
To correctly program the NUCLEO-F030R8 board using a binary file, the user can follow
the drag and drop procedure or use the STM32 ST-LINK utility tool.
2.1.1.1 Drag and drop procedure
1
Install ST-LINK/V2 drivers from www.st.com (usually this is executed automatically
if an Internet connection is available).
2
On the NUCLEO-F030R8 board put the JP5 in U5V position.
a
For further details, refer to the STEVAL-GLA001V1 evaluation board user manual on www.st.com.

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3
Plug the NUCLEO-F030R8 board USB connector (CN1) to the PC via a USB type
A to mini-B cable.
If the ST-LINK drivers are correctly installed, the PC recognizes it as an external
memory device called NUCLEO or similar.
4
Download the firmware binary file for the NUCLEO-F030R8 board from
www.st.com.
5
Drag and drop it into the NUCLEO device listed in the disk driver lista.
Figure 3: NUCLEO device on Windows OS
6
Wait until the flashing operation is complete.
2.1.1.2 STM32 ST-LINK utility tool
1
Download the STM32 ST-LINK Utility tool from www.st.com and install it.
2
Open the tool.
3
Plug the NUCLEO-F030R8 board to the PC via the board USB connector (CN1)
through a USB type A to mini-B cable.
4
Ensure the embedded ST-LINK/V2 is configured to program on the NUCLEO-
F030R8 boardb
5
Click on File→Open File
6
Select the binary file to use.
a
Located under Devices with Removable Storage in the Windows OS computer folder.
b
Both CN2 jumpers must be connected.

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The following window appears.
Figure 4: ST-LINK utility tool window after bin file opening
7
Click on the Program command in the Target menu to download the code in the
STM32 MCU as shown below.
Figure 5: ST-LINK utility tool Target menu and Program command

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8
Click on the Start button in the window below and wait until the flashing is
complete. Figure 6: ST-LINK utility tool download window
9
Close the STM32 ST-LINK utility tool.
2.1.2 Programming the NUCLEO-F030R8 board using a preconfigured
source project
The STSW-GLA001V1 firmware is based on STM32Cube and is provided for the IAR™
IDE tool. The workspace is located under UserProjectFolder\Projects\AC Switch
Control\STM32F030x8\EWARM.
1
Open the IAR Project.eww workspace file for STM32F0x family, located in the above
mentioned workspace.a
Figure 7: STSW-GLA001V1 firmware –Project workspace on IAR™
The IAR workspace contains two configurations (see Figure 8: "STSW-GLA001V1
firmware –IAR workspace configuration selection"):
AC_SWITCH_CONTROL_SERIAL_COMM: to use the serial user interface
based on a RS232 serial communication.
a
Contact your local STMicroelectronics sales office to obtain the source code.

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AC_SWITCH_CONTROL: if the user does not want to use the serial
communication feature.
Figure 8: STSW-GLA001V1 firmware –IAR workspace configuration selection
2
Compile the active project using the Make command from the Project menu or
pressing F7 on the PC keyboard or clicking on the highlighted icon shown in the
following figure.
Figure 9: STSW-GLA001V1 firmware –IAR workspace Make icon
3
If the compiling finishes without errors, click on the highlighted icon shown below or go
to the Project menu to download the project in the microcontroller Flash memory.
Figure 10: STSW-GLA001V1 firmware –IAR workspace Download and Debug icon
4
To download without debugging, open the Download sub-menu (in the Project menu)
and select the Download active application command.
2.2 STEVAL-GLA001V1 operating modes
The STEVAL-GLA001V1
a
operating modes are managed by the STSW-GLA001V1
firmware via the state machine.
a
Refer to the STEVAL-GLA001V1 evaluation board user manual for details on the board and how to use it.

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Figure 11: STSW-GLA001V1 state machine
The different states are:
SYSTEM_INIT: initializes all the firmware variables and parameters used as default
values, at board power on or after MCU hardware reset.
SYSTEM_SWITCH_ON: checks if the ZVS detection circuit is available and/or used
and sets the next state as MAINS_PERIOD_DETECTION if the ZVS signal is
available or as CONTROL_MODE_DETECTION if the ZVS signal is not available.
MAINS_PERIOD_DETECTION: measures the time elapsed between two ZVS signal
rising edges and assigns the MainsPeriod value as follows:
a. If MainsPeriod is in the 16.50 - 16.70 ms range, MainsPeriod = 16.60 ms
(MainsFrequency = 60 Hz).
b. If MainsPeriod is in the 19.90 - 20.10 ms range, MainsPeriod = 20.00 ms
(MainsFrequency = 50 Hz).
c. If the firmware consecutively measures one hundred of MainsPeriod values out of
the valid range (16.50 and 20.10 ms), the state machine is moved to the
FAULT_ERROR state. In this case the Fault_Code is set to
MAINS_PERIOD_DET_ERROR, the Fault status flag is set to FAULT_TRUE
and the MainsPeriod value is set to zero. To restart the MainsPeriod detection
routine, the user has to reset the Nucleo board by clicking on the Reset button
(B2).
d. If the firmware measures a sufficient number of MainsPeriod values in the valid
range, it checks if one of the conditions at points a or b is true. If this does not
happen, the MainsPeriod detection restarts until case a or b are TRUE (and in
this case the state machine is moved to CONTROL_MODE_DETECTION), or
until case c is TRUE.

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e. If the ZVS signal input is not present when zvs_hw = ENABLE, the MainsPeriod
detection algorithm restart as soon as the ZVS signal is available.
CONTROL_MODE_DETECTION: checks the value of the analog selector called
MODE and then sets the GATE_CONTROL_AVAILABLE_IDLE as next state and the
related detected operating mode. If any reading error of MODE value occurs, the
Fault_Code is set as CONTROL_MODE_DET_ERROR, the Fault_Status is set as
FAULT_TRUE and the firmware checks the MODE value until a valid operating mode
is detected. During this operation, the active state remains
CONTROL_MODE_DETECTION.
GATE_CONTROL_AVAILABLE_IDLE: indicates the system is ready for the TRIAC
control. When at least one of the three Tx buttons is pressed, the state machine is
moved to the GATE_CONTROL_ON state. If, during this idle state, the MODE
selector position is changed, the firmware executes a partial reset (only some
variables are set to their default values) and the CONTROL_MODE_DETECTION
state is set as next state.
GATE_CONTROL_ON: executes the operating mode operations selected by the user:
so, at least one of three TRIAC is activated. If during this active state, the MODE
selector position is changed, the system executes a partial reset (only some variables
are set to their default values) and it goes back to the
CONTROL_MODE_DETECTION state.
ANY_STATE is not a real state but it indicates (see Figure 11: "STSW-GLA001V1
state machine") any state of the state machine, as listed above. The Nucleo board
reset or a falling in the MCU power supply can occur at any time (then during any
state) causing a hardware reset and the next state after this reset operation is the
SYSTEM_INIT state.
Table 3: State machine fault codes
Fault
code
Name
Description
0
NO_FAULT_ERROR
No error occurred
1
MAINS_PERIOD_DET_ERROR
The MainsPeriod detected by the
firmware is outside the valid range
2
CONTROL_MODE_DET_ERROR
MODE selector value detected by the
firmware is outside the three control mode
valid ranges. This error also occurs when
zvs_hw = DISABLE and the board is not
powered on
3
PHASE_CONTROL_MODE_NOT_AVAILABLE
This error occurs when the user moves
the MODE selector to the Phase Control
Mode position and zvs_hw = DISABLE
(ZVS circuit not used or unavailable)
4
ZVS_SIGN_ERROR
This error indicates the ZVS signal
absence when zvs_hw = ENABLE. The
possible causes are: ZVS circuit is not
working or the board is not correctly
powered on
5
FLASH_WRITING_ERROR
Some error occurs during the Flash
memory erasing before the writing
operation

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2.2.1 STSW-GLA001V1 control mode detection
In the AC_Switch_Control_Tasks.c file, the MediumFrequencyTasks() function calls
the AC_Switch_Ctrl_MODE_Selector_Reading() method, if the actual state is not
SYSTEM_INIT, SYSTEM_SWITCH_ON, MAINS_PERIOD_DETECTION and
FAULT_ERROR.
The AC_Switch_Ctrl_MODE_Selector_Reading() method detects if the MODE
selector has been moved from the previous position and so if the actual MODE selector
value is changed.
This function calls the AC_Switch_Ctrl_ADC_Conversion() function that reads the
converted value from ADC and, after software filtering operations, it checks if the filtered
value is in the three valid ranges fixed for the MODE selector values and sets the
MODE_value (see Table 4: "STEVAL-GLA001V1 operating modes: analog input and digital
level") as follows:
MODE_1_VALUE, MODE_2_VALUE or MODE_3_VALUE return TRUE.
If a valid value is not detected, the function returns FALSE.
If the AC_Switch_Ctrl_ADC_Conversion() returns TRUE, the value read from ADC is
valid and the firmware compares it with the previous one to detect if a change occurred.
In this case, the state machine is moved to CONTROL_MODE_DETECTION to stop
control of the TRIACs, reset the system and configure the firmware for the new selected
control mode.
These operations are executed by the
AC_Switch_Ctrl_Operating_Mode_Detection() function.
If the AC_Switch_Ctrl_ADC_Conversion() returns FALSE, the read value is not valid
and the CONTROL_MODE_DET_ERROR and fault status are set to FAULT_TRUE.
Table 4: STEVAL-GLA001V1 operating modes: analog input and digital level
MODE selector position
vs. silkscreen
Analog
input
Digital value
(MODE_X_VALUE)
Routine output
(Oper_Mode)
ON/OFF Basic
VDD/1.62
40454
1
ON/OFF Timer
VDD/2
32768
2
Phase control
VDD/2.62
25013
3
2.2.2 ZVS signal synchronization with Vmains zero voltage crossing
The ZVS signal is used to synchronize the gate control with the mains zero voltage in
ON/OFF mode and for the phase control mode, but a delay can occur, due to the
component tolerance, the opto-coupler delay, etc. In these cases, there is a delay (positive
or negative) on the ZVS signal
a
.
a
td_zvs.

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Figure 12: ZVS delay principle
The TRIAC control synchronization with ZVS has to be accurate in some applications; so,
this delay has to be compensated.
For this purpose, the TIM6 is used. As mentioned, the td_zvs delay can be positive or
negative: in the first case the pulse gate command must be anticipated and in the second
case it must be delayed.
The TIM6 manages the falling edge zero crossing IRQ emulation (counting the
MainsPeriod/2 after the rising edge ZVS_IRQ) and the td_zvs compensation.
The delay management is executed by setting the TIM6_ARR as follows:
td_zvs > 0
Equation 1
ZVS_IRQ event
  󰇡
󰇢 
Equation 2
TIM6_UP_IRQ event
  

td_zvs < 0
Equation 3
ZVS_IRQ event
  
Equation 4
TIM6_UP_IRQ event
  

In the two cases above (where td_zvs≠0), the firmware starts the TIM6 counting in the
ZVS_IRQ, whereas it starts the TIM1 counting and TIM1 PWM output generation in
the TIM6_UP_IRQ
a
a
For further details on the different operating modes, see the following paragraphs.
Real
Ideal
td_zvs
neg pos
Vmains ZVS
Real
t

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td_zvs = 0
Equation 5
ZVS_IRQ event
  
2.2.3 ON/OFF pulse basic/timer control mode
2.2.3.1 td_zvs = 0
The figure below shows the timing diagram of the ON/OFF control in basic/timer mode
related to the generic TRIAC Tx with pulse command.
Figure 13: ON/OFF control in basic/timer mode with pulse gate command timing diagram
The basic mode is started and stopped via the Tx push button which corresponds to the
TRIAC to control. For example, in the case of pulse command, the gate command is a
pulse sequence with tptime length.
The timer mode starts via the Tx push button and stops after a time called OnTime. For
safety reasons, the Tx button can be pressed to stop the control. If any button is pressed,
the control is stopped when the OnTime is elapsed.
As you can press the Tx button any time, the basic control starts only at the Vmains first
rising edge after the Tx pressure (not shown in Figure 13: "ON/OFF control in basic/timer
mode with pulse gate command timing diagram").
The gate command pulse sequence is synchronized with the zero voltage switching (ZVS)
signal: the TIM1_PWM_CHx generation starts in the ZVS signal interrupt service routine
(ISR) for the rising edge zero crossing and in the TIM6 Update ISR for the falling edge zero
tp
Stop TIM1
TIM1_UP_IRQ
TIM1_ARR
ZVS_IRQ
Start TIM1
Start TIM6
tp
TIM1_PWM_CHx
tp tp
Vmains
ZVS
Gate command Gx
generated by MCU
TIM1 Update ISR
operations
t
t
t
t
ZVS Rising edge ISR
operations
TIM1 counting
timing diagram
tp tp
t
TIM6_ARR
TIM6_UP_IRQ
TIM6 Update ISR
operations
t
Start TIM1
TIM6 counting
timing diagram
TIM1_UP_IRQ
t
Start TIM1
Start TIM6 Start TIM1
Start TIM6
Stop TIM6 Start TIM1
Stop TIM6 Start TIM1
Stop TIM6

UM2313
System setup guide
DocID031215 Rev 1
19/33
crossing of the Vmains signal. The TIM6 is used to count the MainsPeriod/2 to generate the
gate pulse command at the falling edge zero crossing. The gate command signal stops in
the TIM1 Update ISR (TIM1_UP ISR). The TIM1_ARR (auto reload register) is calculated
with the tpvalue.
The TIM6_ARR is calculated with the MainsPeriod/2 value. In this case, the TIM1_CCRx is
equal to zero to start the PWM output immediately when the counting of TIM1 starts,
remaining at high level for the TIM1 period, which corresponds, in terms of counter value,
to the ARR value and, in terms of time, to the pulse width tp.
Equation 6
   
2.2.3.2 td_zvs ≠ 0
The following cases are referred to the ZVS signal rising edge where the possible cases
are td_zvs >0 and td_zvs <0.
a
The ZVS signal rising edge corresponds to the Vmains signal falling edge and vice
versa (refer to Figure 12: "ZVS delay principle").
In the following timing diagrams, the pressure of the Tx push button occurs at a random
time before the ZVS signal first rising event (ZVS_IRQ in the figures below).
The following figure shows the timing diagram for the generic TRIAC (Tx) gate command
generation in case of a positive delay in the ZVS signal.
Figure 14: ON/OFF control in basic/timer mode with pulse gate command timing diagram with
td_zvs > 0
a
Refer to Section 2.2.5: "ZVS signal delay measurement" for further details on td_zvs measurement.
tp
Stop TIM1
TIM1_UP_IRQ
TIM1_ARR tp
TIM1_PWM_CHx
tp tp
Gate command Gx
generated by MCU
t
t
t
t
TIM1 counting
timing diagram
tp
1
0
ZVS_IRQ
Start TIM6
Vmains
ZVS
t
ZVS Rising edge ISR
operations
t
TIM6_ARR2TIM6_UP_IRQ
TIM6 Update ISR
operations
Start TIM1
TIM6 counting
timing diagram
t
td_zvs
td_zvs
TIM6_UP_IRQ
TIM6_ARR1
Start TIM1
Stop TIM6 Start TIM1
Start TIM6
Start TIM1
Stop TIM6
TIM1 Update ISR
operations
td_zvs
Start TIM6

System setup guide
UM2313
20/33
DocID031215 Rev 1
The following figure shows the timing diagram for the generic TRIAC (Tx) gate command
generation in case of a negative delay in the ZVS signal.
Figure 15: ON/OFF control in basic/timer mode with pulse gate command timing diagram with
td_zvs < 0
2.2.3.3 ON/OFF DC basic/timer control mode with no ZVS signal
This control mode is active when the zvs_hw parameter is set as DISABLE; that is, when
the ZVS signal detection circuit is not available or the user does not want to use it.
As shown in the figures below, if the ZVS signal is not available, the ZVS synchronization is
not possible.
The gate control output is activated when a valid pressure of the Tx button is detected.
The gate control output corresponds to the TIM1 PWM_Channel_x output and is
deactivated only when the button is pressed again (if the basic mode is selected) or when
the OnTime has elapsed (if the timer mode is selected) or when the STOP(Tx) command is
sent via the user interface, as detailed in Section 2.2.6: "User interface".
tp
Stop TIM1
TIM1_UP_IRQ
TIM1_ARR tp
TIM1_PWM_CHx
tp tp
Gate command G
x
generated by µC
t
t
TIM1 counting
timing diagram
tp tp t
1
0
ZVS_IRQ
Vmains
ZVS
ZVS Rising edge ISR
operations
t
td_zvs
Start TIM6
TIM6_ARR2
TIM6 counting
timing diagram TIM6_UP_IRQ
TIM6_ARR1
TIM6 Update ISR
operations Start TIM1 Start TIM1
t
t
Start TIM6
Start TIM1
ZVS_IRQ
TIM1 Update Interrupt
Routinne operations
Stop TIM6 Start TIM1 Start TIM1
Stop TIM6
Start TIM6
ZVS_IRQ
TIM6_UP_IRQ