bcd to decimal conversion

[raman00084]

please send sample program for bcd to decimal conversion in c

i am using pic16f877a ccs complier

 

[milan.rajik]

In two digit BCD say 23 is written as 0010 0011. So, to convert it to decimal you have to do something like this

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Code C - [expand]
1
decNum = ((bcdNum >> 4) * 10) + (bcdNum & 0b00001111)

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23 is a byte (upto 255 is a byte)

BCD 23 will be stored as 00100011

00100011 >> 4 = 00000010 = 2 decimal

2 * 10 = 20 decimal

00100011 & 0b00001111 = 00000011 = 3

20 + 3 = 23 decimal

 

[Raady Here]

for variable unsigned char data
perform

((((data & 0xF0 )>>4) * 10) + (data&0xF));

 

[milan.rajik]

@Raady

((data & 0xF0) >> 4) is same as (data >> 4)

 

[Gorgon]

@Raady

((data & 0xF0) >> 4) is same as (data >> 4)

Only as long as 'data' is a char. If it is an integer it may be the same.