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Sintaxis para estados y transiciones

Exprese el comportamiento del gráfico utilizando acciones y condiciones

Controle la ejecución del gráfico de Stateflow^® especificando cuándo ocurren las transiciones entre estados y cuándo se ejecutan las acciones. Sincronice la ejecución de estados emitiendo eventos. Detecte los cambios en los valores de los datos y compruebe qué estados están activos durante la ejecución del gráfico.

Bloques

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Bloques de Stateflow

Chart	Implemente una lógica de control con una máquina de estados finitos
State Transition Table	Represent modal logic in tabular format
Truth Table	Represent logical decision-making behavior with conditions, decisions, and actions

Sintaxis de Stateflow

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Objetos gráficos

Represent Operating Modes by Using States

Transition Between Operating Modes

Use Default Transitions to Specify Initial Substate Activity

Control Chart Execution by Using Inner Transitions

Transiciones de autobucle

Operadores

Detectar cambios

change	Generate implicit event when data changes value
hasChanged	Detect change in data since last time step
hasChangedFrom	Detect change in data from specified value
hasChangedTo	Detect change in data to specified value

Detectar bordes

crossing	Detect rising or falling edge in data since last time step
falling	Detect falling edge in data since last time step
rising	Detect rising edge in data since last time step

Actividad de mensajes

discard	Discard message
forward	Mensaje de remisión
isvalid	Determine if message is valid
length	Determine length of message queue
receive	Extract message from queue
send	Broadcast message or event

Actividad de estados

enter	Generate implicit event when state becomes active
exit	Generate implicit event when state becomes inactive
in	Compruebe la actividad de estado en Stateflow

Crear, concatenar y convertir datos de cadena

ascii2str	Convierta un arreglo del tipo `uint8` en una cadena
blanks	Create a character array of blanks
double	Convert string to double precision value
isletter	Determine which characters are letters
isspace	Determine which characters are space characters
str2ascii	Convierta una cadena a un arreglo del tipo `uint8`
str2double	Convierta una cadena a un valor de doble precisión
strcat	Concatenación de cadenas
strcmp	Compare cadenas
string	Create a string
tostring	Convierta valores numéricos en una cadena

Determinar tipo y propiedades de datos de cadena

isletter	Determine which characters are letters
isspace	Determine which characters are space characters
isstring	Determine if input is string
strlen	Determine la longitud de la cadena
strlength	Length of string

Buscar y reemplazar datos de cadena

contains	Determine if pattern is in a string
endsWith	Determine if strings end with pattern
matches	Determine if pattern matches string
replace	Find and replace one or more substring
replaceBetween	Replace substrings between start and end points
startsWith	Determine if strings start with pattern
strfind	Find strings within other strings
strrep	Find and replace substrings

Editar datos de cadena

erase	Delete substrings within strings
eraseBetween	Delete substring between start and end points
extractAfter	Extract substring after specified positions
extractBefore	Extract substring before specified positions
insertAfter	Insert string after specified substring
insertBefore	Insert string before specified substring
lower	Convert string to lowercase
plus	Append strings
reverse	Reverse order of characters in strings
strcpy	Asigne un valor de cadena
strip	Remove leading and trailing characters from string
strtrim	Remove leading and trailing white space from a string
substr	Extraiga una subcadena de una cadena
upper	Convert a string to uppercase

Comparar datos de cadena

matches	Determine if pattern matches string
strcmp	Compare cadenas
strcmpi	Compare strings (case insensitive)
strncmp	Compare first `n` characters of strings (case sensitive)
strncmpi	Compare first `n` characters of strings (case insensitive)

Lógica temporal

after	Ejecute la gráfico después de la emisión de un evento o un tiempo especificado
at	Execute chart at event broadcast or specified time
before	Execute chart before event broadcast or specified time
count	Chart executions during which condition is valid
duration	Tiempo durante el cual la condición es válida
elapsed	Time since state became active
every	Execute chart at regular intervals
temporalCount	Number of events, chart executions, or time since state became active

Temas

Directrices para nombrar objetos de Stateflow
Palabras clave reservadas, restricciones de longitud de los nombres y limitaciones de nomenclatura.
Eliminate Redundant Code by Combining State Actions
Combine entry, during, and exit actions in a state.
Control Function-Call Subsystems by Using bind Actions
Bind a function-call output event to the activity of a state.
Combinar transiciones e intersecciones para crear rutas ramificadas
Cree puntos de decisión en las rutas de transición.
Supported Operations for Chart Data
Perform mathematical computations in Stateflow charts.
Supported Symbols in Actions
Special symbols available for state and transition actions.
Call Extrinsic MATLAB Functions in Stateflow Charts
Access MATLAB^® functions that are not supported for code generation.
Access MATLAB Functions and Workspace Data in C Charts
Call built-in MATLAB functions by using the ml operator.
Call C Library Functions in C Charts
Access C functions in state and transition labels.
Check State Activity by Using the in Operator
Determine if a state is active during chart execution.
Detect Changes in Data and Expression Values
Define chart behavior when data and expressions change value between time steps.
Control Chart Execution by Using Temporal Logic
Use event-based and absolute-time temporal logic operators.
Control Chart Behavior by Using Implicit Events
Trigger chart actions by changes in data values and state activity.
Control Oscillations by Using the duration Operator
Simplify debouncing logic in charts that have transient signals.

Información relacionada

MATLAB como lenguaje de acción

Ejemplos destacados

Model Bang-Bang Temperature Control System

Model a bang-bang control system that regulates the temperature of a boiler. The model has two components:

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Implement an Automatic Transmission Gear System by Using the duration Operator

Models an automotive transmission system by using the Stateflow® temporal logic operator duration to automatically shift gears based on the vehicle throttle requirements and speed. For more information, see Control Chart Execution by Using Temporal Logic.

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Simulate a Media Player

Use string data to define the behavior of a media player.

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Design a Game by Using Stateflow

Implement the game of Tetris by using a Stateflow® chart. This model is a redesigned version of the classic Stateflow demo sf_tetris. The new design incorporates these programming paradigms:

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Modeling an Automatic Transmission Controller

Model an automotive drivetrain with Simulink®. Stateflow® enhances the Simulink model with its representation of the transmission control logic. Simulink provides a powerful environment for the modeling and simulation of dynamic systems and processes. In many systems, though, supervisory functions like changing modes or invoking new gain schedules must respond to events that may occur and conditions that develop over time. As a result, the environment requires a language capable of managing these multiple modes and developing conditions. In the following example, Stateflow shows its strength in this capacity by performing the function of gear selection in an automatic transmission. This function is combined with the drivetrain dynamics in a natural and intuitive manner by incorporating a Stateflow block in the Simulink block diagram.

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Contar eventos utilizando el operador temporalCount

Cuente los casos de eventos explícitos e implícitos.

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