topic Re: char to int ASCII hex in CodeWarrior for MCU

char to int ASCII hex

Seitec — Sat, 14 Mar 2009 05:52:33 GMT

Hello, I would like ask. I need convert e.g. char "AE" to unsigned short int 0x4145? do any body pleas know how I can convert this? Thank you very much.

Message Edited by Seitec on 2009-03-13 10:53 PM

Re: char to int ASCII hex

bigmac — Sat, 14 Mar 2009 07:19:45 GMT

Hello,

Assuming big endian data format, simply create a union between a char array and an unsigned short variable.

typedef union {

char a[3]; // Allow for null termination

unsigned short b;

} ascseq;

ascseq val; // Define variable

To load data to the array -

val.a[] = "AE";

To read the equivalent integer value, use val.b

Regards,

Mac

Re: char to int ASCII hex

kef — Sat, 14 Mar 2009 15:07:17 GMT

val.a[] = "AE";

I think you meant here

strcpy(val.a, "AE");

memcpy(val.a, "AE", 2);

Re: char to int ASCII hex

Seitec — Sat, 14 Mar 2009 15:29:49 GMT

Thank you very much.Great thank you .

Re: char to int ASCII hex

bigmac — Sun, 15 Mar 2009 00:57:26 GMT

Sorry about that. I was somewhat confused with the initialisation process allowed within the definition of an array variable.

Another alternative to the use of the copy functions might be to load each of the two array elements separately -

val.a[0] = 'A';

val.a[1] = 'E';

or perhaps create a function -

unsigned short getval( char *s)
{
ascseq temp;

temp.a[0] = s[0];
temp.a[1] = s[1];
return temp.b;
}

with the following usage -

unsigned short i;

i = getval( "AE" );

Regards,

Mac

Message Edited by bigmac on 2009-03-15 05:04 AM

Re: char to int ASCII hex

roberto_m — Mon, 14 Dec 2009 21:26:46 GMT

And how can I convert a counter (stored in an unsigned char) to a string?

I mean:

0xFF >> 255 >> 32:35:35 (ASCII values)

Re: char to int ASCII hex

J2MEJediMaster — Mon, 14 Dec 2009 22:03:41 GMT

Check out FAQ-27705 for source code that converts a binary value to a text string.

---Tom

Re: char to int ASCII hex

roberto_m — Tue, 15 Dec 2009 18:41:48 GMT

Thank you!

It is very easy