AT89S52 through C Program with 7segment

[gakko]

Hello everyone
I want to know that how to write a C program into AT90S52 and
it make 7-segment become the number adder
EG. with 5ms 0->1 after 5ms 1 -> 2
thanks

 

[errakeshpillai]

7-segment is just an output device.
You may connect a keypad with the controller to get the input from some device.

Correct me if I am wrong in intercepting your problem..

 

[gakko]

well...
I want to write a C program into AT89S52
and then
AT89S52 contral 7segment to display the number ( auto add one by sequence

 

[jayanth.devarayanadurga]

5 ms is too fast. If you use single 7 segment to display value from 0 to 9 then in 50 ms all the digits will be displayed once. You cant see the digits changing. Use at least 500 ms delay. If more than one 7 segment display is used to display numbers then you need to multiplex the displays by driving one display at a time. What do you want to display, integer value or floating point value? What type of display are you using? CC or CA?

 

[gakko]

thanks
but my counter have 4digital
I don't know how to curry in when 9 -> 10
also
please teach me how to do a good delay time

- - - Updated - - -

I want to display integer value
my type is CA

 

[jayanth.devarayanadurga]

These might help you.

https://embedded-lab.com/blog/?p=4935

https://www.codeproject.com/Articles/441038/7-Segment-Display-Multiplexing-Control-with-Parall



https://www.edaboard.com/threads/288404/

 

[errakeshpillai]

You should be using a function to display the integer on the seven segment.
So always display four digits, whether it be less than 4 digits. Add a 0 in front.
When you write your function in this way, it becomes easier..

 

[gakko]

Its difficult for me to understand how to curry when 9 become 10
Can you write a example program code to shows that how to curry in( when one digital to two digital , two digital to three digital and three digital to four digital
please write more easy

 

[jayanth.devarayanadurga]

Try this Code.

 

[gakko]

what is digital[] in use in this program?
also
we use P3 to contal the digital's display dp?