AltosSiteMap: add targeting circles around landing site

[fw/altos] / README

diff --git a/README b/README
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..282b9ce5a95d63139a9f3d0fdadb71c31884f831 100644 (file)
--- a/README
+++ b/README
@@ -0,0 +1,114 @@
+       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.
+
+Tasking API:
+
+        * Multi-tasking
+        * Non-preemptive
+        * Unix-style sleep/wakeup scheduling
+        * Strict round-robin, no priorities
+
+       uint8_t ao_sleep(void *wchan)
+
+               Puts current task to sleep. Will wake up when wchan is
+               signalled (returning 0), or when an alarm has expired
+               (returning 1).
+       
+       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.
+
+       void ao_wake_task(struct ao_task *task)
+
+               Wake the task as if the wchan it is waiting on had
+               been signalled.
+
+       void ao_alarm(uint16_t delay)
+
+               Queue an alarm to expire 'delay' ticks in the future.
+               The alarm will cause the task to wake from ao_sleep
+               and return 1. Alarms are cancelled if the task is
+               awoken by ao_wakeup or ao_wake_task.
+
+       void ao_exit(void)
+
+               Stop the current task and remove it from the list of
+               available tasks.
+
+Timer API
+
+        * Regular timer ticks (at 100Hz, by default)
+        * All time values are in ticks
+
+        uint16_t ao_time(void)
+
+               Returns the curent tick count
+
+       void ao_delay(uint16_t delay)
+
+               Suspend task execution for 'delay' ticks.
+
+DMA API
+
+        * Static DMA entry allocation
+
+       uint8_t ao_dma_alloc(uint8_t *done)
+
+               Allocates one of the 5 DMA units on the cc1111
+               processor. When this DMA unit is finished, it will
+               set *done to 1 and wakeup anyone waiting on that.
+
+       void ao_dma_set_transfer(uint8_t id, void *src, void *dst,
+                                uint16_t count, uint8_t cfg0, uint8_t cfg1)
+
+               Prepares the specified DMA unit for operation.
+
+       void ao_dma_start(uint8_t id)
+
+               Start DMA on the specified channel.
+
+       void ao_dma_trigger(uint8_t id)
+
+               Manually trigger a DMA channel
+
+       void ao_dma_abort(uint8_t id)
+
+               Abort a pending DMA transfer, signalling
+               that by setting the associated 'done' to
+               AO_DMA_ABORTED and waking any task
+               sleeping on that.