Entity: Pgp4TxLiteProtocol
- File: Pgp4TxLiteProtocol.vhd
Diagram
Description
Title : PGPv4: https://confluence.slac.stanford.edu/x/1dzgEQ
Company : SLAC National Accelerator Laboratory
Description: PGPv4Lite Transmit Protocol Takes pre-packetized AxiStream frames and creates a PGPv4 66/64 protocol stream (pre-scrambler). Inserts IDLE and SKP codes as needed. Inserts
user K codes on request.
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 | |
| NUM_VC_G | integer range 1 to 16 | 1 | |
| SKIP_EN_G | boolean | false | |
| FLOW_CTRL_EN_G | boolean | false | |
| STARTUP_HOLD_G | integer | 0 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| pgpTxClk | in | sl | User Transmit interface |
| pgpTxRst | in | sl | |
| pgpTxIn | in | Pgp4TxInType | |
| pgpTxOut | out | Pgp4TxOutType | |
| pgpTxActive | in | sl | |
| pgpTxMaster | in | AxiStreamMasterType | |
| pgpTxSlave | out | AxiStreamSlaveType | |
| locRxFifoCtrl | in | AxiStreamCtrlArray(NUM_VC_G-1 downto 0) | Status of local receive fifosThese get synchronized by the Pgp4Tx parent |
| locRxLinkReady | in | sl | |
| remRxLinkReady | in | sl | |
| phyTxActive | in | sl | Output Interface |
| protTxReady | in | sl | |
| protTxValid | out | sl | |
| protTxStart | out | sl | |
| protTxData | out | slv(63 downto 0) | |
| protTxHeader | out | slv(1 downto 0) |
Signals
| Name | Type | Description |
|---|---|---|
| crcIn | slv(63 downto 0) | |
| crcOut | slv(31 downto 0) | |
| r | RegType | |
| rin | RegType | |
| crcReset | sl | |
| crcDataValid | sl |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| REG_INIT_C | RegType | ( crcReset => '0', crcDataValid => '0', waitSof => '1', doEof => '0', tUserLast => (others => '0'), pauseDly => (others => '0'), pauseEvent => (others => '0'), pauseEventSent => (others => '0'), overflowDly => (others => '0'), overflowEvent => (others => '0'), overflowEventSent => (others => '0'), skpInterval => PGP4_TX_IN_INIT_C.skpInterval, skpCount => (others => '0'), startupCount => 0, pgpTxSlave => AXI_STREAM_SLAVE_INIT_C, opCodeReady => '0', linkReady => '0', frameTx => '0', frameTxErr => '0', protTxValid => '0', protTxStart => '0', protTxData => (others => '0'), protTxHeader => (others => '0')) |
Types
| Name | Type | Description |
|---|---|---|
| RegType |
Processes
- comb: ( crcOut, locRxFifoCtrl, locRxLinkReady, pgpTxIn, pgpTxMaster,
pgpTxRst, phyTxActive, protTxReady, r, remRxLinkReady )
- seq: ( pgpTxClk )
Instantiations
- U_Crc32: surf.Crc32Parallel