Re: [ECOS] printf problem

[Gary Thomas <gary@mlbassoc.com>]

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?

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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