第一次提交

app/app_frm_timer.c

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+#include "app_config.h"
+#include "interface.h"
+
+#include "app_frm_timer.h"
+#include "app_frm_signal.h"
+
+// 全局计时器列表头指针
+static Timer *timer_list = NULL;
+
+// 添加一个静态变量来跟踪当前定时器数量
+static uint32_t current_timer_count = 0;
+
+// 初始化定时器
+void timerInit(Timer *timer)
+{
+    if (timer == NULL)
+    {
+        return;
+    }
+    timer->target_time = 0;
+    timer->elapsed_time = 0;
+    timer->start_time = 0;
+    timer->active = 0;
+    timer->priority = 1; // 默认优先级为1
+    timer->next = NULL;
+}
+
+// 修改 timerStart 函数
+void timerStart(Timer *timer, uint32_t target_time, unsigned char priority)
+{
+    if (timer == NULL || target_time == 0)
+    {
+        printf("Error: Null timer pointer or invalid target time\n");
+        return;
+    }
+
+    // 检查定时器是否已经在列表中
+    Timer *current = timer_list;
+    while (current != NULL)
+    {
+        if (current == timer)
+        {
+            // 定时器已在列表中, 只需更新其参数
+            irq_state_t saved_state = enter_critical_section();
+
+            timer->target_time = target_time;
+            timer->start_time = getCurrentTime();
+            timer->elapsed_time = 0;
+            timer->active = 1;
+            timer->priority = priority;
+
+            exit_critical_section(saved_state);
+            return;
+        }
+        current = current->next;
+    }
+
+    // 检查是否达到最大定时器数量
+    if (current_timer_count >= MAX_TIMERS)
+    {
+        printf("Error: Maximum number of timers reached\n");
+        return;
+    }
+
+    // 初始化新定时器
+    irq_state_t saved_state = enter_critical_section();
+
+    timer->target_time = target_time;
+    timer->start_time = getCurrentTime();
+    timer->elapsed_time = 0;
+    timer->active = 1;
+    timer->priority = priority;
+
+    // 将定时器插入到定时器列表
+    timer->next = timer_list;
+    timer_list = timer;
+    current_timer_count++;
+
+    exit_critical_section(saved_state);
+}
+
+// 停止定时器
+void timerStop(Timer *timer)
+{
+    if (timer == NULL)
+    {
+        return;
+    }
+
+    irq_state_t saved_state = enter_critical_section();
+
+    Timer *current = timer_list;
+    Timer *prev = NULL;
+    while (current != NULL)
+    {
+        if (current == timer)
+        {
+            // 从链表中移除定时器
+            if (prev == NULL)
+            {
+                timer_list = current->next;
+            }
+            else
+            {
+                prev->next = current->next;
+            }
+            current_timer_count--;
+            timer->active = 0;
+            timer->next = NULL; // 断开链接
+            break;
+        }
+        prev = current;
+        current = current->next;
+    }
+
+    exit_critical_section(saved_state);
+}
+
+// 更新所有定时器, 在定时器中断中调用
+void timerUpdateAll(void)
+{
+    irq_state_t saved_state = enter_critical_section();
+
+    Timer *prev = NULL;
+    Timer *current = timer_list;
+
+    while (current != NULL)
+    {
+        if (current->active)
+        {
+            current->elapsed_time++;
+            if (current->elapsed_time >= current->target_time)
+            {
+                current->active = 0;
+                // 发送定时器过期消息
+                publishMessage((void *)(uintptr_t)current, current->priority);
+
+                // 从链表中移除已过期的定时器
+                if (prev == NULL)
+                {
+                    timer_list = current->next;
+                }
+                else
+                {
+                    prev->next = current->next;
+                }
+                current_timer_count--;
+                Timer *expired_timer = current;
+                current = current->next;
+                expired_timer->next = NULL; // 断开链接
+                continue;                   // 跳过前进 prev 指针
+            }
+        }
+        prev = current;
+        current = current->next;
+    }
+
+    exit_critical_section(saved_state);
+}
+
+// 获取当前定时器数量
+uint32_t getCurrentTimerCount(void)
+{
+    return current_timer_count;
+}