X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao_task.c;h=b69f51ee432f61c5b0f408df01c5123301f11e00;hp=81a71dda3d258ba5c24d5691282eab0f73b18c5d;hb=7bc3d9962872850e7b420221cf689db16b4305cc;hpb=e45fce7f82d704d677f84c69b0e07588d109d780

diff --git a/ao_task.c b/ao_task.c
index 81a71dda..b69f51ee 100644
--- a/ao_task.c
+++ b/ao_task.c
@@ -114,13 +114,23 @@ ao_yield(void) _naked
 	/* Find a task to run. If there isn't any runnable task,
 	 * this loop will run forever, which is just fine
 	 */
-	for (;;) {
-		++ao_cur_task_index;
-		if (ao_cur_task_index == ao_num_tasks)
-			ao_cur_task_index = 0;
-		ao_cur_task = ao_tasks[ao_cur_task_index];
-		if (ao_cur_task->wchan == NULL)
-			break;
+	{
+		__pdata uint8_t	ao_next_task_index = ao_cur_task_index;
+		for (;;) {
+			++ao_next_task_index;
+			if (ao_next_task_index == ao_num_tasks)
+				ao_next_task_index = 0;
+
+			ao_cur_task = ao_tasks[ao_next_task_index];
+			if (ao_cur_task->wchan == NULL) {
+				ao_cur_task_index = ao_next_task_index;
+				break;
+			}
+
+			/* Enter lower power mode when there isn't anything to do */
+			if (ao_next_task_index == ao_cur_task_index)
+				PCON = PCON_IDLE;
+		}
 	}
 
 	{