altos: Rename 'core' to 'kernel'

[fw/altos] / src / kernel / ao_rssi.c

diff --git a/src/kernel/ao_rssi.c b/src/kernel/ao_rssi.c
new file mode 100644 (file)
index 0000000..244a84f
--- /dev/null
+++ b/src/kernel/ao_rssi.c
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#include "ao.h"
+
+static __xdata uint16_t        ao_rssi_time;
+static __pdata uint16_t        ao_rssi_delay;
+static __pdata uint8_t ao_rssi_led;
+
+void
+ao_rssi(void)
+{
+       for (;;) {
+               while ((int16_t) (ao_time() - ao_rssi_time) > AO_SEC_TO_TICKS(3))
+                       ao_sleep(&ao_rssi_time);
+               ao_led_for(ao_rssi_led, AO_MS_TO_TICKS(100));
+               ao_delay(ao_rssi_delay);
+       }
+}
+
+void
+ao_rssi_set(int rssi_value)
+{
+       if (rssi_value > 0)
+               rssi_value = 0;
+       ao_rssi_delay = AO_MS_TO_TICKS((-rssi_value) * 5);
+       ao_rssi_time = ao_time();
+       ao_wakeup(&ao_rssi_time);
+}
+
+__xdata struct ao_task ao_rssi_task;
+
+void
+ao_rssi_init(uint8_t rssi_led)
+{
+       ao_rssi_led = rssi_led;
+       ao_rssi_delay = 0;
+       ao_add_task(&ao_rssi_task, ao_rssi, "rssi");
+}