On Thu, Mar 12, 2009 at 2:18 PM, Joel Sherrill
<[email protected]> wrote:
> <blush> thanks for the plug.
>
> <hint> we need context switch code to help finish the AVR port. :)
I should look into that because I've got a little project going on
that is in danger of using nested interrupt handlers. From what I've
read, that's a good indication that I should start looking at an RTOS.
> Right but this time I am just doing simple bare metal
> with avr-libc. I am so used to how newlib does it that
> I have to be retrained. :)
The avr-libc stdio page is a good read. That's where I go every time I
have to be reminded of how to use printf on an avr. But try this on
for size:
#include <stdio.h>
static int uart_putchar(char c, FILE *stream);
static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
static int
uart_putchar(char c, FILE *stream)
{
if (c == '\n')
uart_putchar('\r', stream);
loop_until_bit_is_set(UCSRA, UDRE);
UDR = c;
return 0;
}
int
main(void)
{
init_uart();
stdout = &mystdout;
printf_P("Hello, world!\n");
return 0;
}
--
GDB has a 'break' feature; why doesn't it have 'fix' too?
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