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Array as Argument

I want to send control codes to a printer
they look like this :

	unsigned char cntrl_codes[6] = { 0x0d, 0x14, 0x1b, 0x4c, 0x0d, 0x0d};

I have made a function to send this array to serial port :

//this function takes two arguments
//    1)the array
//    2)time delay between successive codes

void print(unsigned char* c,unsigned char del)
{				
	int x,y;		
	y=strlen(c);//y++;      
	for(x=0;x<y;x++)
	{

		putchar(c[x]);
		delay(del);
		
	}
}

There has to be a more graceful way to do this !!!

Parents

0 Alan Chen over 23 years ago in reply to Graham Cole

Try this:

void TxSerial(unsigned char *ptr)
{   
    while(*ptr!=0x0)
    {
       SBUF=*ptr;     //Send one character
       while(!TI)     //Wait for completion
       {}
       TI=0;          //Clear Tx flag
       ptr++;
     }
}

Reply

0 Alan Chen over 23 years ago in reply to Graham Cole

Try this:

void TxSerial(unsigned char *ptr)
{   
    while(*ptr!=0x0)
    {
       SBUF=*ptr;     //Send one character
       while(!TI)     //Wait for completion
       {}
       TI=0;          //Clear Tx flag
       ptr++;
     }
}

Children

0 Andy Neil over 23 years ago in reply to Alan Chen
while(*ptr!=0x0)
this, of course, requires that the string is null-terminated (as any good 'C' string should be - see K&R)

this technique is fundamental to all of the 'C' string-handling functions - they just keep going thro' the string til they hit a NUL!
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0 Mandar Limaye over 23 years ago in reply to Andy Neil

Thanks All

I am using a null-term array and it works fine.
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