Entity: JesdAlignFrRepCh
- File: JesdAlignFrRepCh.vhd
Diagram
Description
Company : SLAC National Accelerator Laboratory
Description: Align bytes and replace control characters with data
What is supported: Frame sizes 1, 2, 4 GT Word sizes 2, 4 <--- I don't think 2 word is supported because hard coded in Jesd204bPkg.vhd
Note: dataRx_i - is little endian and byte-swapped (directly from GTH) First sample in time: dataRx_i(7 downto 0) & dataRx_i(15 downto 8) Second sample in time: dataRx_i(23 downto 16)& dataRx_i(31 downto 24)
sampleData_o is big endian and not byte-swapped First sample in time: sampleData_o(31 downto 16)Second sample in time: sampleData_o(15 downto 0)
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 | |
| F_G | positive | 2 | Number of bytes in a frame |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk | in | sl | |
| rst | in | sl | |
| replEnable_i | in | sl | Enable character replacement |
| scrEnable_i | in | sl | Enable scrambling/descrambling |
| alignFrame_i | in | sl | One c-c long pulse from syncFSM indicating that first non Kcharacter has been received |
| dataValid_i | in | sl | Data ready (replace control character with data when '1') |
| dataRx_i | in | slv((GT_WORD_SIZE_C*8)-1 downto 0) | Data and character indication |
| chariskRx_i | in | slv(GT_WORD_SIZE_C-1 downto 0) | |
| sampleData_o | out | slv((GT_WORD_SIZE_C*8)-1 downto 0) | Sample data output (after alignment, character replacement and scrambling) |
| sampleDataValid_o | out | sl | |
| alignErr_o | out | sl | Invalid or misaligned character in the data |
| positionErr_o | out | sl | Invalid (comma) position received at time of alignment |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| SAMPLES_IN_WORD_C | positive | (GT_WORD_SIZE_C/F_G) | |
| REG_INIT_C | RegType | ( dataRxD1 => (others => '0'), chariskRxD1 => (others => '0'), dataAlignedD1 => (others => '0'), charAlignedD1 => (others => '0'), scrData => (others => '0'), lfsr => (others => '0'), descrData => (others => '0'), scrDataValid => '0', sampleData => (others => '0'), descrDataValid => '0', dataValid => '0', position => intToSlv(1, GT_WORD_SIZE_C) -- Initialize at "0001" or "01" ) |
Types
| Name | Type | Description |
|---|---|---|
| RegType |
Processes
- comb: ( r, rst, chariskRx_i, dataRx_i, alignFrame_i, dataValid_i, replEnable_i, scrEnable_i )
- seq: ( clk )