for (;n!=0;n--)

rvwills · Joined: 20 Dec 2014 Posts: 10

Programmers:

I am a CCS C newbe and have been following the discussion regarding enabling "delay_in_seconds delay_seconds".

Here is the code I copied and am using with an 18f4520 PIC.

I have also edited this (copied) code by mixing "delay_in_seconds" with "delay_ms"

m4rcdbk · Joined: 29 Aug 2016 Posts: 10 Location: Michigan, USA

Your understanding of a for loop is correct;
The line in question means (or could be thought of) as

rvwills · Joined: 20 Dec 2014 Posts: 10

m4rcdbk:

Am I correct then with the following?

the "Variable initialization" obtains "2" from "delay_in_seconds (2);

Bob

rvwills · Joined: 20 Dec 2014 Posts: 10

m4rcdbk:

Am I correct then with the following?

the "Variable initialization" obtains "2" from "delay_in_seconds (2);

and "variable initialization" obtains "1" from "delay_in_seconds (1);

etc.?

Thanks,

Bob

asmboy · Joined: 20 Nov 2007 Posts: 2128 Location: albany ny

this is a horrible way to make that delay- using a timer
would be much better.

the following traps zero seconds correctly too

rvwills · Joined: 20 Dec 2014 Posts: 10

asmboy:

Thanks for your input with "void delay_seconds(int n) {
while(n){ delay_ms (1000); --n;}
} "

m4rcdbk · Joined: 29 Aug 2016 Posts: 10 Location: Michigan, USA

rvwills, logically you're correct; it will obtain a value of "2" from delay_in_seconds and then run 2 loops decrementing the counter to 0, delaying by the constant value each time.

However, as asmboy mentions, is a/are better mechanism(s). That can be used.

rvwills · Joined: 20 Dec 2014 Posts: 10

m4rvdbk:
asmboy:

Thanks for your continued patience as I ask questions. I should probably offer an apology for not quickly understanding the best code for this consideration. My many questions likely is a "hang over" from my tutoring process with college math students.

Thanks again...

my game is just beginning

m4rcdbk · Joined: 29 Aug 2016 Posts: 10 Location: Michigan, USA

No problem; sometimes "what works" and "what are best" are not always the same. I often find it best when I have other people I work with print up their code, and review it to say "Okay. It works. Let's see how we can make this quicker/less error prone", so (I at least) don't see any issues; especially while you're learning.

asmboy · Joined: 20 Nov 2007 Posts: 2128 Location: albany ny

correctly handling zero as an accidental input argument is
a common problem for new PIC programmers.

I only aim to offer simpler -robust code.
the same wrapper with multiplication could be used for timer polled overflow
rollovers - to get the same result -without the CCS delay_MS() function

use it and prosper.

rvwills · Joined: 20 Dec 2014 Posts: 10

m4rcdbk:
asmboy:

Thanks again...