加入代码

Day3/README.md

@@ -181,7 +181,118 @@ dist 的好处
 pkgs --update
 ```
 
-## 示例灭灯
+## 示例按键灭灯
+``` c
+#include <board.h>
+#include <rtthread.h>
+#include <drv_gpio.h>
+#ifndef RT_USING_NANO
+#include <rtdevice.h>
+#endif /* RT_USING_NANO */
+
+#define GPIO_LED_B    GET_PIN(F, 11)
+#define GPIO_LED_R    GET_PIN(F, 12)
+
+#define THREAD_PRIORITY         25
+#define THREAD_STACK_SIZE       1024
+#define THREAD_TIMESLICE        5
+
+#define PIN_KEY0  GET_PIN(C,0)
+
+static rt_thread_t tid1 = RT_NULL;
+static rt_thread_t tid2 = RT_NULL;
+
+static void key_name_entry(void *parameter);
+static void led_name_entry(void *parameter);
+static rt_sem_t dynamic_sem = RT_NULL;
+
+int main(void)
+{
+    rt_pin_mode(GPIO_LED_R, PIN_MODE_OUTPUT);
+    rt_pin_mode(PIN_KEY0, PIN_MODE_INPUT_PULLUP);
+
+    dynamic_sem = rt_sem_create("dsem", 0, RT_IPC_FLAG_PRIO);
+    if (dynamic_sem == RT_NULL)
+    {
+        rt_kprintf("create dynamic semaphore failed.\n");
+        return -1;
+    }
+    else
+    {
+        rt_kprintf("create done. dynamic semaphore value = 0.\n");
+    }
+
+    tid1 = rt_thread_create("key_thread",
+                            key_name_entry, RT_NULL,
+                            THREAD_STACK_SIZE,
+                            THREAD_PRIORITY, THREAD_TIMESLICE);
+    if (tid1 != RT_NULL)
+    {
+        rt_thread_startup(tid1);
+    }
+
+    tid2 = rt_thread_create("led_thread",
+                            led_name_entry, RT_NULL,
+                            THREAD_STACK_SIZE,
+                            THREAD_PRIORITY, THREAD_TIMESLICE);
+    if (tid2 != RT_NULL)
+    {
+        rt_thread_startup(tid2);
+    }
+
+    // while (1)
+    // {
+    //     rt_pin_write(GPIO_LED_R, PIN_HIGH);
+    //     rt_thread_mdelay(500);
+    //     rt_pin_write(GPIO_LED_R, PIN_LOW);
+    //     rt_thread_mdelay(500);
+    // }
+}
+static void key_name_entry(void *parameter)
+{
+    rt_uint32_t count=0;
+    while (1)
+    {
+        if(rt_pin_read(PIN_KEY0) == PIN_LOW)
+        {
+            rt_thread_mdelay(100);
+            if(rt_pin_read(PIN_KEY0) == PIN_LOW)
+            {
+                rt_kprintf("key0 is pressed (%d) ", count++);
+                    // rt_sem_release(dynamic_sem);
+            }
+            else
+            {
+                rt_sem_release(dynamic_sem);
+            }
+        }
+        else
+        {
+            rt_sem_release(dynamic_sem);
+        }
+        rt_thread_mdelay(10);
+    }
+    
+}
+
+static void led_name_entry(void *parameter)
+{
+    rt_uint32_t count=0;
+    rt_uint32_t result=0;
+    while (1)
+    {
+        rt_pin_write(GPIO_LED_R, PIN_HIGH);
+        result = rt_sem_take(dynamic_sem, RT_WAITING_FOREVER);
+        if (result == RT_EOK)
+        {            
+            // rt_kprintf("LED LOW\n");
+            rt_pin_write(GPIO_LED_R, PIN_LOW);
+        }
+        
+        rt_thread_mdelay(10);
+    }
+}
+```
 ### 灭了怎么点都不亮
 因为按键按灭就没再点亮
 在key线程循环开始每次点亮？