Cyclone® V Hard Processor System Technical Reference Manual
Visible to Intel only — GUID: sfo1410070012319
Ixiasoft
Visible to Intel only — GUID: sfo1410070012319
Ixiasoft
26.4.3. Message Object Reconfiguration for Frame Reception
To configure a message object to receive data frames, set the Dir field to 0.
To configure a message object to receive remote frames, set the Dir field to 1, set UMask to 1, and set RmtEn to 0.
To avoid modifying an object while it is being transmitted, you must set MsgVal to 0 before changing any of the following configuration and control bits:
- ID[28:0]
- Xtd
- DLC[3:0]
- RxIE
- TxIE
- RmtEn
- EoB
- UMask
- Msk[28:0]
- MXtd
- MDir
The following fields of a message object can be changed without clearing MsgVal:
- Data0[7:0] to Data7[7:0]
- TxRqst
- NewDat
- MsgLst
- IntPnd