Entity: AxiStreamGearbox
- File: AxiStreamGearbox.vhd
Diagram
Description
Company : SLAC National Accelerator Laboratory
Description: Block to resize AXI Streams. Re-sizing is always little endian.
Resizer should not be used when interleaving tDests
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 | General Configurations |
| READY_EN_G | boolean | true | |
| PIPE_STAGES_G | natural | 0 | |
| SIDE_BAND_WIDTH_G | positive | 1 | General purpose sideband |
| SLAVE_AXI_CONFIG_G | AxiStreamConfigType | AXI Stream Port Configurations | |
| MASTER_AXI_CONFIG_G | AxiStreamConfigType |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| axisClk | in | sl | Clock and reset |
| axisRst | in | sl | |
| sAxisMaster | in | AxiStreamMasterType | Slave Port |
| sSideBand | in | slv(SIDE_BAND_WIDTH_G-1 downto 0) | |
| sAxisSlave | out | AxiStreamSlaveType | |
| mAxisMaster | out | AxiStreamMasterType | Master Port |
| mSideBand | out | slv(SIDE_BAND_WIDTH_G-1 downto 0) | |
| mAxisSlave | in | AxiStreamSlaveType |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType | |
| pipeAxisMaster | AxiStreamMasterType | |
| pipeSideBand | slv(SIDE_BAND_WIDTH_G-1 downto 0) | |
| pipeAxisSlave | AxiStreamSlaveType |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| SLV_BYTES_C | positive | SLAVE_AXI_CONFIG_G.TDATA_BYTES_C | |
| MST_BYTES_C | positive | MASTER_AXI_CONFIG_G.TDATA_BYTES_C | |
| SLV_USER_C | positive | ite(SLAVE_AXI_CONFIG_G.TUSER_BITS_C /= 0, SLAVE_AXI_CONFIG_G.TUSER_BITS_C, 1) |
|
| MST_USER_C | positive | ite(MASTER_AXI_CONFIG_G.TUSER_BITS_C /= 0, MASTER_AXI_CONFIG_G.TUSER_BITS_C, 1) |
|
| WORD_MULTIPLE_C | boolean | (SLV_BYTES_C >= MST_BYTES_C and SLV_BYTES_C mod MST_BYTES_C = 0) or (MST_BYTES_C >= SLV_BYTES_C and MST_BYTES_C mod SLV_BYTES_C = 0) | |
| TSTRB_EN_C | boolean | SLAVE_AXI_CONFIG_G.TSTRB_EN_C and MASTER_AXI_CONFIG_G.TSTRB_EN_C | |
| TDEST_EN_C | boolean | (SLAVE_AXI_CONFIG_G.TDEST_BITS_C > 0) and (MASTER_AXI_CONFIG_G.TDEST_BITS_C > 0) | |
| TID_EN_C | boolean | (SLAVE_AXI_CONFIG_G.TID_BITS_C > 0) and (MASTER_AXI_CONFIG_G.TID_BITS_C > 0) | |
| TUSER_EN_C | boolean | (SLAVE_AXI_CONFIG_G.TUSER_BITS_C > 0) and (MASTER_AXI_CONFIG_G.TUSER_BITS_C > 0) and (SLAVE_AXI_CONFIG_G.TUSER_MODE_C /= TUSER_NONE_C) and (MASTER_AXI_CONFIG_G.TUSER_MODE_C /= TUSER_NONE_C) | |
| TDEST_BITS_C | natural | ite(TDEST_EN_C, minimum(SLAVE_AXI_CONFIG_G.TDEST_BITS_C, MASTER_AXI_CONFIG_G.TDEST_BITS_C), 1) |
|
| TID_BITS_C | natural | ite(TID_EN_C, minimum(SLAVE_AXI_CONFIG_G.TID_BITS_C, MASTER_AXI_CONFIG_G.TID_BITS_C), 1) |
|
| TUSER_BITS_C | natural | ite(TUSER_EN_C, minimum(SLAVE_AXI_CONFIG_G.TUSER_BITS_C, MASTER_AXI_CONFIG_G.TUSER_BITS_C), 1) |
|
| MAX_C | positive | maximum(MST_BYTES_C, SLV_BYTES_C) |
|
| MIN_C | positive | minimum(MST_BYTES_C, SLV_BYTES_C) |
|
| SHIFT_WIDTH_C | positive | wordCount(MAX_C, MIN_C) * MIN_C + MIN_C |
|
| REG_INIT_C | RegType | ( writeIndex => 0, tValid => '0', tData => (others => '0'), tStrb => (others => '0'), tKeep => (others => '0'), tLast => '0', tLastDly => '0', tDest => (others => '0'), tId => (others => '0'), tUser => (others => '0'), sideBand => (others => '0'), sAxisSlave => AXI_STREAM_SLAVE_INIT_C) |
Types
| Name | Type | Description |
|---|---|---|
| RegType |