Re: [ECOS] printf problem

[Tathagata Das <tathagata at alumnux dot com>]

Thanks for you quick response.
Yes,  my serial driver gets invoke when printf is called. I have 
debugged that.
But when I use printf from thread, my serial driver does not get called.

Gary Thomas wrote:

> Tathagata Das wrote:
>
> > Hi all,
> >       I am trying to write serial driver.
> > My problem is printf is working in cyg_user_start function, but does 
> > not work from any thread.
> > I have debugged. From thread context, serial_write function is not 
> > invoked.
> >
> > diag_printf is working in thread.
> >
> > Here is my program ----
> >
> > void entry_point1(cyg_addrword_t data)
> > {
> >        for(;;) {
> >                cyg_thread_delay(100);
> >                diag_printf("\n5");
> >                printf("0");
> >        }
> > }
> >
> > void entry_point2(cyg_addrword_t data)
> > {
> >        for(;;) {
> >                cyg_thread_delay(200);
> >                diag_printf("\n6");
> >                printf("1");
> >        }
> > }
> >
> > void cyg_user_start(void)
> > {
> >        printf("tatha");
> >        cyg_thread_create(4, entry_point1, (cyg_addrword_t) "A", 
> > "Thread 1", (void *) stack[0], 4096,  &thread1, &thread_s[0]);
> >        cyg_thread_create(4, entry_point2, (cyg_addrword_t) "B", 
> > "Thread 2", (void *) stack[1], 4096,  &thread2, &thread_s[1]);
> >        cyg_thread_resume(thread1);
> >        cyg_thread_resume(thread2);
> >
> > }
> >
> > I am geting "tatha", "5" and "6" ... but not getting "0" or "1"
> >
> > Probably I am missing something.
> > I will be very pleased if somebody help me.
>
>
> How did you configure 'printf' to use your serial driver?
> Does your serial driver (any functions) ever get called?

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