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Help me write a program to decode 8 bit number to 3 BCD one

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semiconductor

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I need your help!

I'm writing a program to decode a 8 bit number (from 0 to 255) to 3 BCD-number for AT89C51 (3 BCD-numbers is put out at P1 and 4 high bits of P2.

For example: 122 (xxxxxxxx - 8-bit number) <--> 0001 0010 0010

But I haven't finished it yet. Can someone help me? The algorithm or some recommends to help me!

Thank you beforehand!
 

Re: I need your help!

are you working in c or assembly?
 

Re: I need your help!

semiconductor said:
For example: 122 (xxxxxxxx - 8-bit number) <--> 0001 0010 0010
Click to expand...

An ideea,

You have a number, say x=122 (decimal)...
You need some scratchpad bytes...
hi, mid, lo

while(x>=100)
{
x-= 100;
hi++;
}
while(x>=10)
{
x-=10;
mid++;
}
lo=x;
After that, put hi, mid and lo where you want :)
That's C, you can use the ideea in asm, too :)

Cheers !
 

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