blob: 04ee0cc1488ef8ce209c9c862941f10c5c8f55bf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/********************************************************************
* Description: tp.comp
* IEC_61131-3 Pulse Time timer for LinuxCNC HAL bit signals.
*
* This is a HAL component that can be used to send a pulse signal
* for a certain amount of time.
*
*********************************************************************
*
* Author: Chad Woitas (aka satiowadahc)
* License: GPL Version 2
* Created on: 2021/06/10
* System: Linux
*
* Copyright (c) 2021 All rights reserved.
*
* Last change: 2021-11-02 - Conversion to comp format
*
********************************************************************/
component tp "IEC TP timer - generate a high pulse of defined duration on rising edge";
pin in bit in "Input signal";
pin out bit q "Output signal";
pin out float et "Elapsed time since start of pulse in seconds";
param rw float pt "Pulse time in seconds";
variable int in_old; // Value of in on last cycle, for rising edge detection
function _ fp "Update the timer";
license "GPL";
author "Chad Woitas";
;;
FUNCTION(_) {
if(pt < 0) {
pt = 0;
rtapi_print_msg(RTAPI_MSG_WARN,
"tp: Pulse time must be positive, resetting to 0");
}
if(et < 0) {
et = 0;
rtapi_print_msg(RTAPI_MSG_WARN,
"tp: Elapsed time rolled over, resetting to 0");
}
// Check timers
if((in && !in_old) || q){
// Update outputs
if(et < pt){
q = 1;
et += fperiod;
}
else{
q = 0;
}
}
else{
// Reset Variables
et = 0;
q = 0;
}
in_old = in;
}
|
