Added software timers

Accessory state machine framework functional

source/soft_timer.c

@@ -0,0 +1,90 @@
+#include "soft_timer.h"
+
+static soft_timer_t timers[MAX_TIMERS];
+
+void stimer_init(void) {
+    for (int i = 0; i < MAX_TIMERS; ++i) 
+    {
+        timers[i].active = false;
+        timers[i].inUse = false;
+    }
+}
+
+void stimer_end(int timer_id)
+{
+    if (timer_id >= 0 && timer_id < MAX_TIMERS) 
+    {
+        timers[timer_id].active = false;
+        timers[timer_id].inUse = false;
+    }
+}
+
+int stimer_start(uint32_t timeout_ticks, timer_mode_t mode, timer_callback_t cb, void* ctx) {
+    for (int i = 0; i < MAX_TIMERS; ++i) {
+        if (!timers[i].inUse) {
+            timers[i].timeout_ticks = timeout_ticks;
+            timers[i].remaining_ticks = timeout_ticks;
+            timers[i].mode = mode;
+            timers[i].callback = cb;
+            timers[i].callback_context = ctx;
+            timers[i].inUse = true;
+            timers[i].active = true;
+            timers[i].fired = false;
+            return i;
+        }
+    }
+    return -1; // No free timer slot
+}
+
+void stimer_stop(int timer_id) {
+    if (timer_id >= 0 && timer_id < MAX_TIMERS) 
+    {
+        timers[timer_id].active = false;
+    }
+}
+
+bool stimer_is_active(int timer_id) {
+    return timer_id >= 0 && timer_id < MAX_TIMERS && timers[timer_id].active;
+}
+
+bool stimer_fired(int timer_id) 
+{
+    if (timer_id >= 0 && timer_id < MAX_TIMERS) {
+        return timers[timer_id].fired;
+    }
+    return false;
+}
+
+bool stimer_clearFired(int timer_id)
+{
+    if (timer_id >= 0 && timer_id < MAX_TIMERS) 
+    {
+        timers[timer_id].fired = false;
+    }
+}
+
+void stimer_update(void) {
+    for (int i = 0; i < MAX_TIMERS; ++i) {
+        if (timers[i].active && timers[i].remaining_ticks > 0) {
+            timers[i].remaining_ticks--;
+            if (timers[i].remaining_ticks == 0) 
+            {
+            	timers[i].fired = true;
+
+                if (timers[i].callback) 
+                {
+                    timers[i].callback(timers[i].callback_context);
+                }
+
+                if (timers[i].mode == TIMER_MODE_PERIODIC) 
+                {
+                    timers[i].remaining_ticks = timers[i].timeout_ticks;
+                } 
+                else 
+                {
+                    timers[i].active = false;
+                }
+            }
+        }
+    }
+}