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question on "Multiple non-blocking delays with 1 timer&

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storic

Joined: 04 Aug 2007
Posts: 3
Location: SA Australia

Posted: Sun Aug 05, 2007 12:40 am Post subject: question on "Multiple non-blocking delays with 1 timer&

thank you for sharing this code, it was something I was going to do, started several times with similar code however was not sure about how to go about it until now.

with regards to the struct

Code:

void (*stop)() ; // pointer to a function to call after delay

Is this call to a dummy function so you know when you are at the end or is there an actual function called stop within "MikroE C"

I take it

Code:

KEY_STRUCT keys[NBKEYS] ; // struct array

refers to the number of STRUCT's with the keys[NBKEYS] =2

Code:

void keyStart(unsigned char i, unsigned long d)

you have made it in ms. I would be making it in sec as I would be looking for up to several minuets/hours in some instants.

with this code. am I to understand that I can delay an output until on or off by a set count and while during this process, I can set another delay function without effecting the first delay function thus creating 2 (keys[NBKEYS] ) independent delays. More if NBKEYS is more than 2.

One addition is I would add with #define NBKEYS 2

Code:

#define CPU 0
#define TimeON 1
//etc to be able to ID
// keyStart(0, 2000) ; to read keyStart(CPU, 2000) ; // #0 = CPU

Andrew

BrunoG
Site Admin

Joined: 22 Nov 2005
Posts: 636

Posted: Sun Aug 05, 2007 10:18 pm Post subject: Re: question on "Multiple non-blocking delays with 1 ti

Hi Andrew, nice to see you here Wink

storic wrote:

thank you for sharing this code, it was something I was going to do, started several times with similar code however was not sure about how to go about it until now.

with regards to the struct

Code:

void (*stop)() ; // pointer to a function to call after delay

Is this call to a dummy function so you know when you are at the end or is there an actual function called stop within "MikroE C"

stop is a member of a structure : it is a pointer to a function with no parameters and no return value.
this pointer must be assigned to a valid user's function, that will be called when the corresponding delay has expired.

Quote:

I take it

Code:

KEY_STRUCT keys[NBKEYS] ; // struct array

refers to the number of STRUCT's with the keys[NBKEYS] =2

keys is an array of NBKEYS (i.e 2) elements of KEY_STRUCT type structure.

Quote:

Code:

void keyStart(unsigned char i, unsigned long d)

you have made it in ms. I would be making it in sec as I would be looking for up to several minuets/hours in some instants.

since the delay in ms is an unsigned long integer, you can have delays up to 49 days approximately Mr. Green

Quote:

with this code. am I to understand that I can delay an output until on or off by a set count and while during this process, I can set another delay function without effecting the first delay function thus creating 2 (keys[NBKEYS] ) independent delays. More if NBKEYS is more than 2.

That's it !

Quote:

One addition is I would add with #define NBKEYS 2

Code:

#define CPU 0
#define TimeON 1
//etc to be able to ID
// keyStart(0, 2000) ; to read keyStart(CPU, 2000) ; // #0 = CPU

Andrew

Yes, no problem !
_________________
BrunoG, Administrator

storic

Joined: 04 Aug 2007
Posts: 3
Location: SA Australia

Posted: Tue Aug 07, 2007 11:00 am Post subject: Re: question on "Multiple non-blocking delays with 1

BrunoG wrote:

Hi Andrew, nice to see you here Wink

storic wrote:

thank you for sharing this code, it was something I was going to do, started several times with similar code however was not sure about how to go about it until now.

with regards to the struct

Code:

void (*stop)() ; // pointer to a function to call after delay

Is this call to a dummy function so you know when you are at the end or is there an actual function called stop within "MikroE C"

I am impress, I did not see it at first, it took some time to see how the function was part of the struct, I was looking at the code not the meaning of the code (looking at the forest untill I saw the tree) this line " keys[0].stop = toggleC ;" was when I understood it. Thanks Shocked

I have to say it would have taken me many moons to get to this stage, so my statement "with similar code" was not true. I should of said "with clunky, disjointed code" Embarassed

thanks again
_________________
What has been learnt if you make the same mistake? Wink

BrunoG
Site Admin

Joined: 22 Nov 2005
Posts: 636

Posted: Tue Aug 07, 2007 9:54 pm Post subject:

Hi Storic, you're welcome. Have a great walk through the forest ! _________________ BrunoG, Administrator

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