00-99 COUNT UP & DOWN USING PIC16f887a

[be80be]

but the requirements is 2 single digit 7 seg..

You better not say you wrote the code google will tell on you LOL

ISIS is not going to be like real hardware it slows it down so you can see whats going on.

 

[AnneMaj]

You better not say you wrote the code google will tell on you LOL

ISIS is not going to be like real hardware it slows it down so you can see whats going on.

we dont have to build the hardware.. our requirement is only the simulation in ISIS..

 

[be80be]

It's not the code that's letting you see it change segments it's ISIS and how it show the simulation.

 

[AnneMaj]

but in other projects the display is not blinking alternatively.

 

[AnneMaj]

is it possible to change the display in ISIS to not make it blink?

 

[Ian Rogers]

Lke I said in post #13

FOR SIMULATION PURPOSES..... You can use the dual as it makes NO difference for simulation..... The code isn't changed one bit...

 

[AnneMaj]

Lke I said in post #13

FOR SIMULATION PURPOSES..... You can use the dual as it makes NO difference for simulation..... The code isn't changed one bit...

our requirement is 2 single digit.

 

[Ian Rogers]

our requirement is 2 single digit.

Then you'll have to re-write the code to display the digits faster....

 

[be80be]

Play with this line in the code

msecs   equ     usecs*1000

change it to

msecs   equ     usecs*100

The code I posted for you was for a 16mhz clock you need to let ISIS no that.

Or change this line

clock   equ     16

change the 16 to what your using.

 

[Cluene]

Hello, i have the same project but in my case, the maximum value is 20 instead of 99. What do I need to change in the code?

 

[Cluene]

good day, do you know how

Then you'll have to re-write the code to display the digits faster....

to make the maximum value into 20 instead of 99?

 

[Ian Rogers]

Cluene Your clue is here

xorlw 0xA0 ; upper limit 99?

This appears to be 160 instead of the 99 that was required.... But here is you upper limit..

 

[Cluene]

thank you i've f

Cluene Your clue is here

xorlw 0xA0 ; upper limit 99?

This appears to be 160 instead of the 99 that was required.... But here is you upper limit..

igured it out.. it set A0 to 21 to get a limit of 20

 

[georgetwo]

Without changing the code, you can easily convince anybody that the "simulation is not running at real time due to your cpu speed"
and you can see the proof in the message written at the message bar of the ISIS application.

 

[Cluene]

hello! i have placed the circuit on the breadboard but it doesnt seem to work.. the display doesn't light up in any way?.. anything you can say about it?

 

[Ian Rogers]

Most common is the program is for common cathode as apposed to the common anode or visa versa..

 

[georgetwo]

hello! i have placed the circuit on the breadboard but it doesnt seem to work.. the display doesn't light up in any way?.. anything you can say about it?

Remember that ISIS application does not show the power supply pins for ICs in the schematic.

 

[KeepItSimpleStupid]

Blinking is "probably good". It might actually show that "inter-digit" blanking is being used. I did not look at the code.
Just from my old days of 6800 class programming and a clock I made at an HP/Agilent Explorer's post.

You have to briefly turn off the digit scan while loading the new digit. Otherwise, you will see artifacts (Low brightness versions of the previous digit)

 

[eng14]

i need this code in c
can you help me

 

[Ian Rogers]

i need this code in c
can you help me

Yes! But I want to see you write something first!!!