Comunicación SPI
SPI, o Interfaz Periférica Serie, es un estándar de enlace de datos serie síncrono que funciona en modo dúplex completo. Se utiliza habitualmente en el ámbito de las pruebas y las mediciones. Entre sus usos típicos se incluyen la comunicación con microcontroladores, memorias EEPROM, dispositivos A2D, controladores embebidos, etc. Mediante la compatibilidad con SPI de Instrument Control Toolbox™, puede abrir conexiones con chips individuales y leer y escribir a través de dichas conexiones.
Cree el objeto de interfaz utilizando la función spi y utilice las funciones read y write para la comunicación. Para utilizar la interfaz SPI, debe tener instalado un adaptador de host Total Phase Aardvark o una placa adaptadora NI-845x. Consulte Configuring SPI Communication para obtener más detalles.
Funciones
instrhwinfo | Information about available hardware |
spi | Create SPI object |
read | Read binary data from SPI instrument |
write | Write binary data to SPI instrument |
writeAndRead | Write and read binary data from SPI instrument |
methods | Class method names and descriptions |
disp | Display instrument object summary information |
connect | Connect device object to instrument |
disconnect | Disconnect device object from instrument |
clear | Remove instrument objects from MATLAB workspace |
Temas
- Configuring SPI Communication
You must have a Total Phase Aardvark host adaptor or an NI-845x adaptor board installed to use the
spiinterface. - Transmitting Data over the SPI Interface
The typical workflow for transmitting data over the SPI interface involves adaptor discovery, connection, communication, and cleanup. This example covers the whole workflow.
- Using Properties on the SPI Object
Use interface-specific properties with the
spiobject. - SPI Interface Overview
The Instrument Control Toolbox SPI support lets you open connections with individual chips and to read and write over the connections to individual chips using an Aardvark or NI-845x host adaptor.
- SPI Interface Usage Requirements and Guidelines
These requirements and tips apply to the use of the SPI interface.
Solución de problemas
Try these tips if you have problems using the toolbox with the SPI interface. Includes information about SPI supported platforms, adapter requirements, and configuration and connection.
Ejemplos destacados
Communicating with EEPROM Using SPI bus
Communicate with EEPROM AT25080A on Aardvark's I2C/SPI Activity Board over the Serial Peripheral Interface (SPI) bus.
