Entity: OneShot
- File: OneShot.vhd
Diagram
Description
Company : SLAC National Accelerator Laboratory
Description: Programmable One-Shot Module
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 | Simulation FF output delay |
| RST_POLARITY_G | sl | '1' | '1' for active HIGH reset, '0' for active LOW reset |
| IN_POLARITY_G | sl | '1' | 0 for active LOW, 1 for active HIGH |
| OUT_POLARITY_G | sl | '1' | 0 for active LOW, 1 for active HIGH |
| PULSE_BIT_WIDTH_G | positive | 4 |
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk | in | sl | Clock |
| rst | in | sl | Optional reset |
| pulseWidth | in | slv(PULSE_BIT_WIDTH_G-1 downto 0) | Pulse width configuration (zero inclusive) |
| trigIn | in | sl | Trigger Input |
| pulseOut | out | sl |
Signals
| Name | Type | Description |
|---|---|---|
| r | RegType | |
| rin | RegType |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| REG_INIT_C | RegType | ( cnt => (others => '0'), pulseOut => not(OUT_POLARITY_G), state => IDLE_S) |
Types
| Name | Type | Description |
|---|---|---|
| StateType | ( IDLE_S, CNT_S, WAIT_S) |
|
| RegType |
Processes
- comb: ( pulseWidth, r, rst, trigIn )
- seq: ( clk )