dual 7 segment counter

[i_engineer]

hello everyone !
i want to counting 0 to 20 on common anode dual seven segment
please anybody tell me c code or any algorithm
i have attached image file with this post
thank you

 

[erio]

here you are:
Decimal Counter Using Two 7-segment displays and an 8051.

 

[i_engineer]

It's okay !
I want dual seven segment counter using only one port.

 

[dayanpad]

Dear Friend
it is easy
your cct is ok
now try to write code assembly language with multiplexing

use this link for cct
Pic Microcontroller P16F84 Tutorial: Seven-Segment Display Example : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

 

[engshahrul]

It better to use timer interrupt.

 

[i_engineer]

Thank you Dayanpad

i write code for display "00" on two seven segment

but i do not know how to increment "00" after 1 second and display "01" on seven segment
#include <REGX51.H>
sbit cntr1 = P1^0;
sbit cntr2 = P1^1;
#define disp P2

void delay(unsigned int time)
{
int i,j;
for(i=0;i<time;i++)
for(j=0;j<1275;j++);
}

void main()
{
while (1)
{
cntr1 = 1;
cntr2 = 1;
disp = 0xc0;
delay(135);


}
}

 

[dayanpad]

hello everyone !
i want to counting 0 to 20 on common anode dual seven segment
please anybody tell me c code or any algorithm
i have attached image file with this post
thank you

Which micro controller you are using

 

[i_engineer]

Hello !

I am Using AT89c51 Micro controller

 

[dayanpad]

Hello !

I am Using AT89c51 Micro controller

Let me know that you need to know the logic how program multiplexing or any others, I mean if you know how multiflexing work
it is not important what langage or what microcontroller you are using

 

[i_engineer]

yes

If you give me some logic then i can build the code...

give me details of multiplexing & algorithm for my dual seven segment counter
thank you

 

[erfan.khalilian69]

Hi guys I have same problem I need to show counter on seven segment which count from 99 to 0, using PIC microcontroller and assembly language ,
any idea ? thanks

 

[dayanpad]

yes

If you give me some logic then i can build the code...

give me details of multiplexing & algorithm for my dual seven segment counter
thank you

movlw b'00000001"
movwf portc ( set digit one Cathode)

movlw 06,5B,4F,66,6D,7D,07,7F,6F ( one of this)
movwf portd

movlw b'00000010"
movwf portc ( clear digit one and set digit two Cathode)

movlw 06,5B,4F,66,6D,7D,07,7F,6F ( one of this)
movwf portd

manage proper delay to cheat your eye

this is simple operation logic of multiplexing, now you can think and improve

 

[erfan.khalilian69]

movlw b'00000001"
movwf portc ( set digit one Cathode)

movlw 06,5B,4F,66,6D,7D,07,7F,6F ( one of this)
movwf portd

movlw b'00000010"
movwf portc ( clear digit one and set digit two Cathode)

movlw 06,5B,4F,66,6D,7D,07,7F,6F ( one of this)
movwf portd

,
manage proper delay to cheat your eye

this is simple operation logic of multiplexing, now you can think and improve

thanks a lot sir
The following are the design considerations to be followed:
1. Set the time using a DIP switch (maximum value is 99 seconds)
2. The setting values should be displayed on the seven segment display
3. The spin process should begin when the start button is pressed and then
„h START the Motor (LED ON)
„h The display value on the seven segments should start counting down
4. When the value is zero, STOP the motor (LED OFF)
5. Also modify the spin timer by increasing or decreasing the rotational speed

 

[jyotirmoy555]

please some1 give a proper answer to the question...otherwise all these crap answers are of no use
thanks

 

[engshahrul]

please some1 give a proper answer to the question...otherwise all these crap answers are of no use
thanks

Did you take action to try the code? If just read and try understand just by reading, you will never do it.
Since, I'm not using Atmel microcontroller and not using assembly language, then not give much commitment here.