sending out hex values thru the rs232

[willie.ar]

I'm trying to transmit the hex values of a table (or binary values, as you prefer) to the RS232 port and, whatever I do, I get the ASCII values of the chars instead.
Example: If the value of the variable is 10 then I get 2 bytes (31,30).
try this

INT tabla[47]={
1,10,10,10,10,64,65,66,67,68,
69,70,71,72,73,74,75,76,77,78,
79,80,81,82,83,84,85,86,87,88,
87,86,85,84,83,82,81,80,79,78,
77,76,75,74,73,72,71
};

for (byte_cntr=0;byte_cntr<47; byte_cntr++)
Printf("%02X", tabla[byte_cntr]);

what am I doing wrong ???

following is the full code
////////////////////////////////////////////////////////////////



#include <16F628.h>
#fuses HS, NOLVP, NOWDT, PUT, NOBROWNOUT
#use delay(clock=20000000)
#use rs232(baud=19200, xmit=PIN_B2, RCV=PIN_B1, parity=N, bits=8, errors)
#include <stdlib.h>
#include <input.c>



unsigned int cont,byte_cntr; // 0-255
INT tabla[47]={
1,10,10,10,10,64,65,66,67,68,
69,70,71,72,73,74,75,76,77,78,
79,80,81,82,83,84,85,86,87,88,
87,86,85,84,83,82,81,80,79,78,
77,76,75,74,73,72,71
};
char comando;
///////////////////////////////////////////////////////////////////////////////

void main() {
// iniciar variables
cont=0;
printf("reset \r\n");
do {
if(kbhit())
{

comando=getc();
if(comando=='I') // send data
{output_LOW(PIN_B3);
for (byte_cntr=0;byte_cntr<47; byte_cntr++)
Printf("%02X", tabla[byte_cntr]);
DELAY_MS(200);
output_HIGH(PIN_B3);
}

}
} while (TRUE);

}

[PCM programmer]

Don't use printf(). Use putc() instead.

[Haplo]

If you use

Printf("%c", tabla[byte_cntr]);

you will get only one character with the ASCII value of 10.

[Guest]

I am writing bytes to EEPROM, and reading them back and checking them with RS-232. I am using the following form of the printf command with success. (PCM version 3.187 I think, don't have the code and stuff with me now)

byte data_byte;
int16 data_address;

data_byte = read_ext_eeprom(data_address);

printf("%2x", data_byte);

Is "%2x" THAT different than "%02X" ?


I got stuck on this once and ended up using "putc()" instead.

[willie.ar]

thanks all of you for your quick response.
putc() works fine. I didn't try it before because the reference manual says the parameter should be an 8 bit character, so it`s a bit confusing...
also what Haplo says refers to a char (it works too).

the ASCII character chart included in the ref manual just define chars up to dec 127 only, that`s why I thought that char did not refer to the hole range.
thanks again.
W