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AXI4 Read

Read data from IP core on target hardware through the AXI4-Lite interface

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Add-On Required: This feature requires the Embedded Coder Support Package for Intel SoC Devices add-on.

  • AXI4 Read block

Libraries:
Embedded Coder Support Package for Intel SoC Devices

Description

Use the AXI4-Lite interface to read a data vector from a contiguous group of registers on the Programmable Logic IP Core into the embedded processor. The AXI4 Read block only supports the AXI4-Lite protocol, allowing for simple, low-throughput memory-mapped communication. Typical uses for this protocol include reading from control and status registers.

Use the AXI4-Lite interface to read data from the Programmable Logic IP Core into the processor.

Examples

Get Started with Embedded Coder Support Package for Intel SoC Devices

Get Started with Embedded Coder Support Package for Intel SoC Devices

Use Embedded Coder® Support Package for Intel® SoC Devices to run a Simulink® model on an Intel SoC device.

Ports

Output

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The N-by-1 vector read from the registers on the IP core starting at Offset address from the base address of the IP core.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean

Parameters

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Enter the path and file name of the IP core device.

Note

If you are using HDL Coder™ to generate the IP core, the IP core is mapped to /dev/mwipcore.

Programmatic Use

Block Parameter: DeviceName
Default: /dev/mwipcore

Enter the offset from the base address of the IP core to the register. The block reads data from this register. Use the hex2dec function when you specify the offset address using a hexadecimal number expressed as a character vector.

Note

Using HDL Coder to generate the IP core, you can get the value of the offset address from the “Register Address Mapping” portion of the Custom IP Report (HDL Coder). For more information, see Register Address Mapping (HDL Coder).

Programmatic Use

Block Parameter: RegisterOffset
Default: hex2dec('0100')

Enter the data type used by the IP core.

Programmatic Use

Block Parameter: DataType
Default: uint16

Enter the size of the data vector read from the IP core device.

Programmatic Use

Block Parameter: DataLength
Default: 1

Enter the sample time in seconds. This block polls the register on the IP core for data. When the Sample time is set to -1, the base-rate of the subsystem that contains this block determines the polling frequency.

Programmatic Use

Block Parameter: SampleTime
Default: -1

Version History

Introduced in R2014b

See Also

| (HDL Coder)

Topics

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