Yes.You could have your own put[s,char,ch] functions to directly write
to the UART.
Something like:
#define TIMEOUT 0xffff
#define SERIAL_BASE 0xBD000020
static volatile unsigned char * const com1 = (unsigned char *)SERIAL_BASE;
void
puts(unsigned char *cp)
{
unsigned char ch;
int i = 0;
while (*cp) {
do {
ch = com1[SER_CMD];
slow_down();
i++;
if (i>TIMEOUT) {
break;
}
} while (0 == (ch & TX_BUSY));
com1[SER_DATA] = *cp++;
}
putch('\r');
putch('\n');
}
slow_down() is a function that would go over 10000 iterations without doing
anything.
Just #define the serial base,command register and the data register
addresses.
HTH,
Manoj
> -----Original Message-----
> From: Marek Zawadzki [mailto:mzawadzk@cs.stevens-tech.edu]
> Sent: Wednesday, March 20, 2002 9:00 AM
> To: unlisted-recipients
> Cc: kernelnewbies@nl.linux.org
> Subject: alternative to printk, printing without buffering
>
>
> Hello,
>
> Is there any alternative to printk which will output a given
> string to the
> screen immediately, with no buffering, in all the cases? (sort of
> direct-device acccess)
> Sometimes when my kernel dies messages die with it in the buffer and I
> can't see what was the cause.
> Thanks!
>
> -marek
>
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive: http://mail.nl.linux.org/kernelnewbies/
> FAQ: http://kernelnewbies.org/faq/
>
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
