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AltOS - 8051 operating system for Altus-Metrum projects
Copyright and License
Copyright © 2009 Keith Packard <keithp@keithp.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
Parameters:
* Multi-tasking
* Non-preemptive
* Unix-style sleep/wakeup scheduling
* Strict round-robin, no priorities
API:
void ao_sleep(void *wchan)
Puts current task to sleep. Will wake up when wchan is signalled
void ao_wakeup(void *wchan)
Wakeup all tasks sleeping on wchan
void ao_add_task(struct ao_task *task, void (*start)(void))
Adds a task to the queue of available tasks
void ao_start_scheduler(void)
Invokes the scheduler, starting the operating system
void ao_yield(void)
Switches to another task which is ready to run. Allows
tasks which want to run for a while to give up the CPU
without needing to sleep
void ao_panic(uint8_t reason)
Any fatal error should call this function, which can
display the error code in some cryptic fashion.
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