Help with PIC programming

[Jay23]

Hi All,
I need to tweek my PIC SW with some added functions. Hope some with good programming skills can lend me hand.
1)I need to make my START_STOP button when pressed a second time to stop the counter and resets.
30min_button is ON
Start_Stop_button is ON
Counter starts to count down
If Start_Stop_button is pressed again counter resets.

2) when insignal Oven_OFF is received Counter stops and resets.
Thanks a lot//gonzo

 

[hexreader]

Need more information:

1) Which PIC? (exactly)
2) Which compiler?
3) What configuration bit settings?
4) What value crystal (assuming 2-pin crystal used)

I will make a wild guess a mikroC compiler, in which case zip up the whole project folder into a .zip file and post here. This will tell me most of what I need to know to try and help you.

Still need to know the answer to question 4 even with zip file

 

[Jay23]

Hi, i am using PIC16F886 and I zip the whole folder from MicroC.
MicroC
4Mhz
Thanks.

 

[hexreader]

Working on it.....

 

[hexreader]

Still working on it - required a re-write, but have made good progress.

2) when insignal Oven_OFF is received Counter stops and resets.

Is the signal normally high, and reset is required when it goes low? ... or normally low and reset wanted when it goes high?

Do you want the time set buttons disabled while counting? ... or the ability to set new time even while a countdown is running?

 

[hexreader]

Current test program attached - using seconds and minutes rather than hours - just while developing.

Might give you an idea of where I am going, and where I might not be meeting requirements...

.... or maybe you would like to finish this yourself, if this code is enough to get you started?

--- Updated Jul 21, 2020 ---

Attached is updated code that I feel happy with....

I will leave you to tweak it to your preferences....

 

[Jay23]

Still working on it - required a re-write, but have made good progress.



Is the signal normally high, and reset is required when it goes low? ... or normally low and reset wanted when it goes high?

Do you want the time set buttons disabled while counting? ... or the ability to set new time even while a countdown is running?

Hi, This signal is low and goes high when RESET.

//

--- Updated Jul 23, 2020 ---

Current test program attached - using seconds and minutes rather than hours - just while developing.

Might give you an idea of where I am going, and where I might not be meeting requirements...

.... or maybe you would like to finish this yourself, if this code is enough to get you started?

--- Updated Jul 21, 2020 ---

Attached is updated code that I feel happy with....

I will leave you to tweak it to your preferences....

Thanks, I will take alook and send feed back. Thanks a lot.
//regards,Gonzo

 

[hexreader]

This signal is low and goes high when RESET.

Then you will need to change-

            if(!Oven_OFF){                                                       // if RC7 goes low

to-

            if(Oven_OFF){                                                       // if RC7 goes high

 

[Jay23]

Hi, i am using PIC16F886 and I zip the whole folder from MicroC.
MicroC
4Mhz
Thanks.

--- Updated Jul 23, 2020 ---

Hi Hexreader,
I tried your code on my device. It was not working as I want it to work.
May be you misunderstood how I was thinking.
It should work like this:
It has 3 set time buttons: 30 min , 2 hour and 5 hour
start/Stop button
When the device is on it will display some messages.
Timer OFF
Set Time : 00:00
When I press 30 min button: green_led is ON
Message: Set time 00;30
When i press the Start/Stop button: Start_Stop led is ON
Message: Timer is ON

So if I want to abort time maybe change so I want to press the Start/Stop again and it should reset the counter to zero
and OFF the green_led and Start/Stop led.

The Oven_OFF is signal from another microcontroller which is HIGH and the PIC resets the current counter when it receives this.

I hope you can help to tween your code.
//regards,Gonzo

 

[hexreader]

I reckon I can make the code work that way...

Working on it....

 

[hexreader]

Latest attempt attached - I will leave it for you to test.

--- Updated Jul 23, 2020 ---

EDIT:

1) oooh nasty - start button works with no time set - will fix that

2)Do you really want Relay 3 toggling while countdown is in progress?

3) If it were my project, I would disable 3-min, 2-hour and 5 hour buttons while countdown is in progress. Would you like me to do it that way?