Shim Constraint - 2024.1 English

AI Engine-ML Kernel and Graph Programming Guide (UG1603)

Document ID
UG1603
Release Date
2024-06-06
Version
2024.1 English
This constrains a node (PLIO or GMIO) to a specific AI Engine-ML array interface, which is specified by column and channel. The column and channel are zero based. The channel is optional, and if omitted, the compiler selects the optimal channel.
Note: PLIOs cannot be placed in every column.  The availability of columns is device dependent.  For example, columns 0-5 cannot be used for PLIO for the xcvc1902-vsva2197-2MP-e-S device. Refer to the relevant device data sheet for more information.

Syntax

"shim": {
  "column": integer,
  "channel": integer (optional)
}

Example

{
  "NodeConstraints": {
    "plioOut1": {
      "shim": {
        "column": 0,
        "channel": 1
      }
    },
    "plioOut2": {
      "shim": {
        "column": 1
      }
    }
  }
}