Entity: AxiStreamPacketizer
- File: AxiStreamPacketizer.vhd
Diagram
Description
Title : AxiStreamPackerizerV0 Protocol: https://confluence.slac.stanford.edu/x/1oyfD
Company : SLAC National Accelerator Laboratory
Description: AXI stream DePacketerizer Module (non-interleave only) Formats an AXI-Stream for a transport link. Sideband fields are placed into the data stream in a header.
Long frames are broken into smaller packets.
This file is part of 'SLAC Firmware Standard Library'. It is subject to the license terms in the LICENSE.txt file found in the top-level directory of this distribution and at: https://confluence.slac.stanford.edu/display/ppareg/LICENSE.html. No part of 'SLAC Firmware Standard Library', including this file, may be copied, modified, propagated, or distributed except according to
the terms contained in the LICENSE.txt file.
Generics
| Generic name | Type | Value | Description |
|---|---|---|---|
| TPD_G | time | 1 ns | |
| MAX_PACKET_BYTES_G | integer | 1440 | Must be a multiple of 8 |
| MIN_TKEEP_G | slv(7 downto 0) | x"01" | |
| OUTPUT_SSI_G | boolean | true | SSI compliant output (SOF on tuser) |
| INPUT_PIPE_STAGES_G | integer | 0 | |
| OUTPUT_PIPE_STAGES_G | integer | 0 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| axisClk | in | sl | AXI-Lite Interface for local registers |
| axisRst | in | sl | |
| maxPktBytes | in | slv(bitSize(MAX_PACKET_BYTES_G) - 1 downto 0) | Actual byte count; will be truncated to multiple of word-size |
| sAxisMaster | in | AxiStreamMasterType | |
| sAxisSlave | out | AxiStreamSlaveType | |
| mAxisMaster | out | AxiStreamMasterType | |
| mAxisSlave | in | AxiStreamSlaveType |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType | |
| inputAxisMaster | AxiStreamMasterType | |
| inputAxisSlave | AxiStreamSlaveType | |
| outputAxisMaster | AxiStreamMasterType | |
| outputAxisSlave | AxiStreamSlaveType | |
| maxWords | WordCounterType |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| LD_WORD_SIZE_C | positive | 3 | |
| WORD_SIZE_C | positive | 2**LD_WORD_SIZE_C | |
| PROTO_WORDS_C | positive | 3 | |
| MAX_WORD_COUNT_C | WordCounterType | to_unsigned(MAX_PACKET_BYTES_G / WORD_SIZE_C, WordCounterType'length) |
|
| AXIS_CONFIG_C | AxiStreamConfigType | ( TSTRB_EN_C => false, TDATA_BYTES_C => 8, TDEST_BITS_C => 0, TID_BITS_C => 0, TKEEP_MODE_C => TKEEP_NORMAL_C, TUSER_BITS_C => ite(OUTPUT_SSI_G, 2, 0), TUSER_MODE_C => TUSER_FIRST_LAST_C) |
|
| VERSION_C | slv(3 downto 0) | "0000" | |
| REG_INIT_C | RegType | ( state => IDLE_S, frameNumber => (others => '0'), packetNumber => (others => '0'), wordCount => (others => '0'), maxWords => to_unsigned(1, WordCounterType'length), eof => '0', tUserLast => (others => '0'), inputAxisSlave => AXI_STREAM_SLAVE_INIT_C, outputAxisMaster => axiStreamMasterInit(AXIS_CONFIG_C)) |
Types
| Name | Type | Description |
|---|---|---|
| StateType | ( IDLE_S, MOVE_S, TAIL_S) |
|
| RegType |
Processes
- comb: ( axisRst, inputAxisMaster, outputAxisSlave, r, maxWords )
- seq: ( axisClk )
Instantiations
- U_Input: surf.AxiStreamPipeline
Description
Input pipeline
- U_Output: surf.AxiStreamPipeline