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Ganimides wrote in a sequence of PMs -

 

HEX to DECIMAL routine.

 

I just wanted to code in C lenguage some kind of routine to convert HEX to DECIMAL routine. How should I write this example in C?

 

5CB2h = 2*1 + 11*16 + 12*256 + 5*4096 = 23730

 

I have a LCD routine that converts to ASCII by a functions called

Datos4bits((value%10) +0x30);

 

How Do I put the Hex to decimal routine into my LCD routine?.

 

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I get the data delivered from a proximity card reader in HEXA.I made an array of 10 elements each one of 8 bits. These 11 elements are according to the ID card and these are 5 bytes. When I start up my routine reads the data string and is ddisplayed in HEX format.

 

For example my personal card delivers 2548D4 in hexa when I read on my LCD but in decimal it`s 2443476 that it is my real card numer identifying me.

 

I just need some routine that converts this HEXA into decimal so that my LCD shows 2443476.

 

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My array is about 10 elements each one of 1 byte as follows:

RFID [0]=02
RFID [1]=05
RFID [2]=04
RFID [3]=08
RFID [4]=0D
RFID [5]=04

 

I need to convert it to decimal and show it to my LCD in decimal format. THe equivalent would be 2443476 (this is my real personal card) but nowaday I`m showing 2548D4 on my LCD display.

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1. Combine the nybble data within RFID, to give a 24-bit binary value.  In C, this would be expressed as an unsigned long or dword value (32 bits length).
2. Convert the binary value to a "packed BCD" format of up to 8 digits, contained in four bytes (dword value).
3. Unpack each BCD value, convert to ASCII, and display the value to LCD.  Alternatively, each ASCII value could be entered in a string array, and the whole string then sent to the LCD.

Message Edited by bigmac on 2006-11-2203:05 PM

Hex2_ASCII.txt (3 kb)