8-bit MicrocontrollersのトピックRe: ASCII letters to numbers

ascii letters to numbers

Skaptor — Thu, 05 Jan 2012 10:29:42 GMT

Hello, I´m trying to do the following:

May I know who to convert value from Ascii to Hexadecimal?

Example:

ABC to 41 42 43

I´ve tried an atoi converter, but somehow it seems to only convert numbers?

Thank you.

best regards,

Re: ascii letters to numbers

bigmac — Thu, 29 Oct 2020 09:49:32 GMT

Hello,

What you seem to require, is to convert an arbitrary byte value (that may just happen to represent an ASCII character), into two hexadecimal ASCII characters, one for each nybble. For example -

// Convert upper nybble to hexadecimal ASCIIbyte conv2hex_H( byte val){  val >>= 4 + '0';  if (val > '9')  val += 7;  return val;}// Convert lower nybble to hexadecimal ASCIIbyte conv2hex_L( byte val){  val &= 0x0F + '0';  if (val > '9')  val += 7;  return val;}

Regards,

Mac

Re: ASCII letters to numbers

Skaptor — Sat, 07 Jan 2012 03:20:55 GMT

Hello,

Thank you for your help.

So how do I use this function, should I add the results and shift them?

regards

Re: ASCII letters to numbers

Skaptor — Thu, 12 Jan 2012 11:08:44 GMT

Thank you very much!