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cvargcal
Joined: 17 Feb 2015
Posts: 134
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| Hex to ASCII |
 Posted: Sun Nov 04, 2018 1:34 pm |
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Hi, I have this problem
I read a module RFID
//!Numero tarteja: 0009531147
//!Dato : 00 91 6f 0b f5
//!check bit, f5 = 00^91^6f^0b
I capture the data:
| Code: | c=getc(RFID);
UID[i++]=c; |
So I get data 00 91 6f 0b f5
now for print I use this
| Code: | | for (k=0;k<5;k++) fprintf(debug,"%c",UID[k]); // No print characters, none print |
When I use:
| Code: | | for (k=0;k<5;k++) fprintf(debug,"%X",UID[k]); // IUD print 00916f0bf5 |
My question is how I do for print every digit as ascii? for can use this function:
| Code: |
// ******* ASCCI to KEYBOARD
uint16_t ToHidKeyboardScancode(char c){
switch(c){
// Hex
case 'A': return(0x04);
case 'B': return(0x05);
case 'C': return(0x06);
case 'D': return(0x07);
case 'E': return(0x08);
case 'F': return(0x09);
case '1': return(0x1E);
case '2': return(0x1F);
case '3': return(0x20);
case '4': return(0x21);
case '5': return(0x22); //
case '6': return(0x23); //
case '7': return(0x24); //
case '8': return(0x25); //
case '9': return(0x26); //
case '0': return(0x27);
}
//if ((c>='a') && (c<='z')) return (c-'a'+'A');
return(0);
}
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Ttelmah
Joined: 11 Mar 2010
Posts: 19828
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| Posted: Sun Nov 04, 2018 2:12 pm |
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No. That's code to convert to a keyboard scancode.
Your first print line should print something. It won't work 'right', since code 00 is normally an unprintable (NUL) code, while 09, is a tab character, 53 is a capital S, then 11 is a 'DC1' control code whose function will depend on the terminal program being used, then the final character is a G.
So what you will get will depend strongly on the program being used. but is unlikely to be anything useful.
Since the codes are not all 'displayable' ASCII characters, there is not a real answer to your question. You'd have to work out what you want to show for each value, and what code your target program needs to display this, and translate each byte to a printable value.
Three of your characters are 'non printable' characters. |
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cvargcal
Joined: 17 Feb 2015
Posts: 134
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| Posted: Sun Nov 04, 2018 2:19 pm |
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| Ttelmah wrote: | No. That's code to convert to a keyboard scancode.
Your first print line should print something. It won't work 'right', since code 00 is normally an unprintable (NUL) code, while 09, is a tab character, 53 is a capital S, then 11 is a 'DC1' control code whose function will depend on the terminal program being used, then the final character is a G.
So what you will get will depend strongly on the program being used. but is unlikely to be anything useful.
Since the codes are not all 'displayable' ASCII characters, there is not a real answer to your question. You'd have to work out what you want to show for each value, and what code your target program needs to display this, and translate each byte to a printable value. |
Thanks
I need print every character as press keyboard...
0 as 0, 9 as 9 depend of IUD get... for example
IUD= 00916f0bf5
I need print 0, 0, 9,1.... with the scancode.... |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Nov 04, 2018 4:57 pm |
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The program below displays:
Test program:
| Code: | #include <18F46K22.h>
#fuses INTRC_IO, NOWDT
#use delay(clock=4M)
#use rs232(UART1, baud=9600, ERRORS)
#define TO_HEX(i) ((i) <= 9 ? ('0' + (i)) : ('A' - 10 + (i)))
//=======================================
void main()
{
int8 k;
int8 UID[5]= {0x00, 0x91, 0x6f, 0x0b, 0xf5};
for(k=0;k<5;k++)
{
putc(TO_HEX(UID[k] >> 4));
putc(TO_HEX(UID[k] & 0x0F));
}
while(TRUE);
} |
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cvargcal
Joined: 17 Feb 2015
Posts: 134
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| Posted: Sun Nov 04, 2018 6:33 pm |
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| PCM programmer wrote: | The program below displays:
Test program:
| Code: | #include <18F46K22.h>
#fuses INTRC_IO, NOWDT
#use delay(clock=4M)
#use rs232(UART1, baud=9600, ERRORS)
#define TO_HEX(i) ((i) <= 9 ? ('0' + (i)) : ('A' - 10 + (i)))
//=======================================
void main()
{
int8 k;
int8 UID[5]= {0x00, 0x91, 0x6f, 0x0b, 0xf5};
for(k=0;k<5;k++)
{
putc(TO_HEX(UID[k] >> 4));
putc(TO_HEX(UID[k] & 0x0F));
}
while(TRUE);
} |
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Thanks you so much! this help me.  |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19828
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| Posted: Mon Nov 05, 2018 3:46 am |
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In fact your original approach would do this:
| Code: |
for(k=0;k<5;k++)
{
printf("%02X",UID[k]);
}
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Does exactly the same....
and (of course), if you wanted each byte displayed as it is input, you can put this in the reading code:
| Code: |
c=getc(RFID);
UID[i++]=c;
printf("%02X",c);
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However 'beware'. Remember this generates two output bytes for each arriving byte, so if the data arrived really quickly, there might not be time to send. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Nov 05, 2018 9:28 am |
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Right, but I assumed that he wanted individual nybbles. That's the way
he talked when he posted:
| Quote: | | I need print 0, 0, 9,1.... with the scancode.... |
My code gives access to individual nybbles. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19828
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| Posted: Mon Nov 05, 2018 11:25 am |
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But you can't have single nibbles. It all only works once a whole byte is received!....
Hence your twin putc. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Nov 05, 2018 11:42 am |
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But with my code, you can display each nybble, if you desire it.
His example shows commas between each nybble. My code can
be modified to do that. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19828
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| Posted: Mon Nov 05, 2018 12:13 pm |
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| Okay. Makes sense. Seems pointless since the data is coming in bytes, but I can see why you gave that solution. |
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cvargcal
Joined: 17 Feb 2015
Posts: 134
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| Posted: Mon Nov 05, 2018 11:47 pm |
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| Ttelmah wrote: | | Okay. Makes sense. Seems pointless since the data is coming in bytes, but I can see why you gave that solution. |
Thanks to everyone ... I have the solution
Just it this:
| Code: |
#define TO_HEX(i) ((i) <= 9 ? ('0' + (i)) : ('A' - 10 + (i)))
ToHidKeyboardScancode(TO_HEX(character >> 4))
ToHidKeyboardScancode(TO_HEX(character & 0x0F)); |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19828
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| Posted: Mon Nov 05, 2018 11:56 pm |
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OK. This can equally well be done with:
| Code: |
printf(ToHidKeyboardScancode,"%02X",character);
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What you have omitted to tell us, is that you want the data sent to a PC
as a USB keyboard input. You talk about ASCII, but this isn't. |
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cvargcal
Joined: 17 Feb 2015
Posts: 134
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| Posted: Tue Nov 06, 2018 12:20 am |
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| Ttelmah wrote: | OK. This can equally well be done with:
| Code: |
printf(ToHidKeyboardScancode,"%02X",character);
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What you have omitted to tell us, is that you want the data sent to a PC
as a USB keyboard input. You talk about ASCII, but this isn't. |
Perfect
I said accii because the function say "asccii to code" 
Sorry I am learning but thanks you so much. Now I can type every byte that coming from module RFID without problem |
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