Diff: main.cpp

Revision:

6:88ac8fb51ce5

Parent:

5:f89c9cfa6b38

--- a/main.cpp	Sun Aug 28 11:55:28 2016 +0000
+++ b/main.cpp	Sun Aug 28 12:57:16 2016 +0000
@@ -15,7 +15,6 @@
 //------------------------------------
 Serial pc(PA_2, PA_3);
 
-// http://www.amobbs.com/thread-4308630-1-1.html
 Timeout flipper;
 
 #define entry()    pc.printf("func:%s\n", __FUNCTION__)
@@ -26,24 +25,50 @@
 enum{PRESS= 0, RELEASE = 1, UNKNOWN};
 #define PRESS_JITTER_TIME       0.01    // 10ms
 #define RELEASE_JITTER_TIME     0.02    // 20ms
-uint8_t flag_status = UNKNOWN;
+uint8_t cur_flag_status = UNKNOWN;
+uint8_t pre_flag_status = UNKNOWN;
+
+void update_key_status(void)
+{
+    pre_flag_status = cur_flag_status;
+    cur_flag_status = mybutton.read();
+}
+
+void key_down_status(void)
+{
+    update_key_status();
+    if(cur_flag_status == PRESS){
+        if(myled.read()!=ON){
+           if(pre_flag_status == PRESS){
+                myled = ON;
+                pc.printf("Pressed\n");
+           }
+        }
+    }
+}
+
+void key_up_status(void)
+{
+    update_key_status();
+    if(cur_flag_status == RELEASE){
+        if(myled.read()!=OFF){
+            if(pre_flag_status == RELEASE){
+                myled = OFF;
+                pc.printf("Released\n");
+           }
+        }
+    }
+}
 
 void double_check(void)
 {
     //entry();
-    pc.printf("before = %d, now= %d\n",flag_status,mybutton.read());
-    switch(flag_status){
+    switch(cur_flag_status){
     case PRESS:
-       if(mybutton.read() == PRESS){
-            myled = ON;
-            pc.printf("Pressed\n");
-       }
+        key_down_status();
        break;
     case RELEASE:
-       if(mybutton.read() == RELEASE){
-            myled = OFF;
-            pc.printf("Released\n");
-       }
+        key_up_status();
        break;
     default:
         error();
@@ -55,7 +80,7 @@
 {
     //entry();
     if(myled.read()!=ON){
-        flag_status = PRESS;
+        cur_flag_status = PRESS;
         // double ckeck for press status
         flipper.attach(&double_check, PRESS_JITTER_TIME);
     }
@@ -65,19 +90,23 @@
 {
     //entry();
     if(myled.read()!=OFF){
-        flag_status = RELEASE;
+        cur_flag_status = RELEASE;
         // double check for releasse status
         flipper.attach(&double_check, RELEASE_JITTER_TIME);
     }
 }
 
 
-
+/* 
+ *  fall edge & timout interrupt for down check;
+ *  rise edge & timout interrupt for up check.
+ */
 int main(void)
 {
     myled = OFF;
     mybutton.fall(&pressed);
     mybutton.rise(&released);
     while(1) {
+        // extend more task here
     }
 }
\ No newline at end of file