int main ( void )
{
int8_t status;
/**
* Reuse part of the idle thread's stack for the stack required
* during this startup function.
*/
SP = (int)&idle_thread_stack[(IDLE_STACK_SIZE_BYTES/2) - 1];
/**
* Note: to protect OS structures and data during initialisation,
* interrupts must remain disabled until the first thread
* has been restored. They are reenabled at the very end of
* the first thread restore, at which point it is safe for a
* reschedule to take place.
*/
/**
* Initialise the OS before creating our threads.
*
* Note that we tell the OS that the idle stack is half its actual
* size. This prevents it prefilling the bottom half with known
* values for stack-checkig purposes, which we cannot allow because
* we are temporarily using it for our own stack. The remainder will
* still be available once the OS is started, this only prevents the
* OS from prefilling it.
*
* If you are not reusing the idle thread's stack during startup then
* you should pass in the correct size here.
*/
status = atomOSInit(&idle_thread_stack[IDLE_STACK_SIZE_BYTES - 1], (IDLE_STACK_SIZE_BYTES/2));
if (status == ATOM_OK)
{
/* Enable the system tick timer */
avrInitSystemTickTimer();
/* Create an application thread */
status = atomThreadCreate(&main_tcb,
16, main_thread_func, 0,
&main_thread_stack[MAIN_STACK_SIZE_BYTES - 1],
MAIN_STACK_SIZE_BYTES);
if (status == ATOM_OK)
{
/**
* First application thread successfully created. It is
* now possible to start the OS. Execution will not return
* from atomOSStart(), which will restore the context of
* our application thread and start executing it.
*
* Note that interrupts are still disabled at this point.
* They will be enabled as we restore and execute our first
* thread in archFirstThreadRestore().
*/
atomOSStart();
}
}
while (1)
;
/* There was an error starting the OS if we reach here */
return (0);
}
int main ( void )
{
int8_t status;
sei();
SerialInit(MYUBRR);
InitWatch();
/**
* Reuse part of the idle thread's stack for the stack required
* during this startup function.
*/
SP = (int)&idle_thread_stack[(IDLE_STACK_SIZE_BYTES/2) - 1];
/**
* Note: to protect OS structures and data during initialisation,
* interrupts must remain disabled until the first thread
* has been restored. They are reenabled at the very end of
* the first thread restore, at which point it is safe for a
* reschedule to take place.
*/
/**
* Initialise the OS before creating our threads.
*
* Note that we cannot enable stack-checking on the idle thread on
* this platform because we are already using part of the idle
* thread's stack now as our startup stack. Prefilling for stack
* checking would overwrite our current stack.
*
* If you are not reusing the idle thread's stack during startup then
* you are free to enable stack-checking here.
*/
status = atomOSInit(&idle_thread_stack[0], IDLE_STACK_SIZE_BYTES, FALSE);
if (status == ATOM_OK)
{
/* Enable the system tick timer */
avrInitSystemTickTimer();
/* Create the main thread */
status = atomThreadCreate(&main_tcb,
MAIN_THREAD_PRIO, main_thread_func, 0,
&main_thread_stack[0],
MAIN_STACK_SIZE_BYTES,
FALSE);
if (status == ATOM_OK)
{
/**
* Application threads successfully created. It is
* now possible to start the OS. Execution will not return
* from atomOSStart(), which will restore the context of
* our application thread and start executing it.
*
* Note that interrupts are still disabled at this point.
* They will be enabled as we restore and execute our first
* thread in archFirstThreadRestore().
*/
atomOSStart();
}
}
while (1)
{
atomTimerDelay (2 * SYSTEM_TICKS_PER_SEC); // wait 2 sec
}
/* There was an error starting the OS if we reach here */
return (0);
}