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+Tasks
+=====
+Tasks can be used for sharing processor for example during period of waiting for
+interrupt. Planing is based on priority.
+
+## Functions
+### tasks_run
+```C
+int8_t tasks_run(void)
+```
+This function starts tasks execution. Should be called after all task slots are
+prepared and at least one task is started. This function exits if no task exist or
+all existing tasks exited.
+
+### task_init
+
+## Structures
+### Task
+```C
+typedef struct {
+    uint8_t flags;
+    void (*func) (void);
+} Task;
+```
+
+### TaskSlot
+```C
+typedef struct {
+    uint8_t flags;
+    Task *task;
+    uint8_t stack_size;
+    uint8_t stack[];
+} TaskSlot;
+```
+
+### Mutex
+
+### Semaphore