Visible to Intel only — GUID: dos1490746710868
Ixiasoft
Visible to Intel only — GUID: dos1490746710868
Ixiasoft
7.5. NWRITE Transactions
Module | Register Address | Name | Value | Description |
---|---|---|---|---|
rio | 0x1040C | Input/Output Slave Mapping Window 0 Control | 32'h0055_0000 or 32'h5555_0000 | Sets the DESTINATION_ID for outgoing transactions to the value 0x55 or 0x5555, depending on the device ID width of the sister_rio. This value matches the base device ID of the sister_rio. Sets the write request type back to NWRITE. |
Initially, the testbench performs two single word transfers, writing to an even word address first and then to an odd word address. The testbench then generates a predetermined series of burst writes across the Input/Output Avalon® -MM slave module's Avalon® -MM write interface on the DUT. These write bursts are each converted into an NWRITE request packet that is sent over the RapidIO serial interface. The testbench cycles from 8 to MAX_WRITTEN_BYTES in steps of 8 bytes. Two tasks are run to carry out the burst writes, rw_addr_data and rw_data. The rw_addr_data task initiates the burst and the rw_data task completes the remainder of the burst.
The sister_rio module receives the NWRITE request packets and presents them across the I/O master Avalon® -MM slave interface as write transactions. The testbench calls the read_writedata task of the sister_bfm_io_write_slave module. The task captures the written data. The written data is checked against the expected value.