Entity: RssiHeaderReg
- File: RssiHeaderReg.vhd
Diagram
Description
Title : RSSI Protocol: https://confluence.slac.stanford.edu/x/1IyfD
Company : SLAC National Accelerator Laboratory
Description: Combines and decodes the header values from input parameters headerValues_i Header is selected by xxxHeadSt_i and addressed by addr_i Outputs the addressed headerData_o and headerLength_o values with 1 Clock Cycle delay
Outputs (oth=>'0')If no header is addressed
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 | |
| SYN_HEADER_SIZE_G | natural | 24 | |
| ACK_HEADER_SIZE_G | natural | 8 | |
| EACK_HEADER_SIZE_G | natural | 8 | |
| RST_HEADER_SIZE_G | natural | 8 | |
| NULL_HEADER_SIZE_G | natural | 8 | |
| DATA_HEADER_SIZE_G | natural | 8 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk_i | in | sl | |
| rst_i | in | sl | |
| synHeadSt_i | in | sl | Header control inputs (must hold values while reading header) |
| rstHeadSt_i | in | sl | |
| dataHeadSt_i | in | sl | |
| nullHeadSt_i | in | sl | |
| ackHeadSt_i | in | sl | |
| busyHeadSt_i | in | sl | |
| ack_i | in | sl | ackHeadSt_i : in sl;Ack sequence number valid |
| txSeqN_i | in | slv(7 downto 0) | Sequence number of the current packet |
| rxAckN_i | in | slv(7 downto 0) | Acknowledgment number of the recived packet handelled by receiver |
| headerValues_i | in | RssiParamType | Negotiated or from GENERICS |
| addr_i | in | slv(7 downto 0) | Out of order sequence numbers from received EACK packetackSeqnArr_i : in Slv16Array(0 to integer(ceil(real(MAX_OUT_OF_SEQUENCE_G)/2.0))-1); ackN_i : in natural; |
| headerData_o | out | slv( (RSSI_WORD_WIDTH_C * 8)-1 downto 0) | |
| ready_o | out | sl | |
| headerLength_o | out | positive |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType | |
| addrInt | integer |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| REG_INIT_C | RegType | ( headerData => (others =>'0'), rdy => '0', ack => '0', busy => '0', txSeqN => (others =>'0'), rxAckN => (others =>'0') ) |
Types
| Name | Type | Description |
|---|---|---|
| RegType |
Processes
- comb: ( r, rst_i, headerValues_i, addrInt, txSeqN_i, rxAckN_i, busyHeadSt_i,
synHeadSt_i, rstHeadSt_i, dataHeadSt_i, nullHeadSt_i, ackHeadSt_i, ack_i )
- seq: ( clk_i )