Diff: debug_led.cpp

Revision:

12:a8ab6e018422

Parent:

0:e36b454cc2e6

Child:

18:472b66aeb1f5

--- a/debug_led.cpp	Thu May 09 21:24:31 2019 +0000
+++ b/debug_led.cpp	Mon May 13 08:39:42 2019 +0000
@@ -6,34 +6,33 @@
     init(mode);
 }
 
- 
 // init function
 //------------------------------------------------------------------------------------------------------------------
 void Debug_led::init(char mode[11]) {
     end_breakpoint = false;
     number_of_breakpoints = 0;
     if (strcmp(mode, "BUTTON_VDD") == 0 || strcmp(mode, "BUTTON_VCC") == 0){ //debug button is connected to VDD
-        button.mode(PullDown);
-        button_mode = 0;
-        button.rise(callback(this, &Debug_led::end_break));
-    }else{
-        button.mode(PullUp); // debug button is connected to GND
-        button_mode = 1;
-        button.fall(callback(this, &Debug_led::end_break));
+        button.mode(PullDown); // set internal pull-down for button connected to VCC
+        button_mode = 0; // pull-down->0, pull-up->1
+        button.rise(callback(this, &Debug_led::end_break));// set IRQ function for rising edge of pin button
+    }else{ // debug button is connected to GND
+        button.mode(PullUp); // set internal pull-up for button connected to VCC
+        button_mode = 1;// pull-down->0, pull-up->1
+        button.fall(callback(this, &Debug_led::end_break)); // set IRQ function for falling edge of pin button
     }
 }
 
 // perform one breakpoint
 //------------------------------------------------------------------------------------------------------------------
 void Debug_led::breakpoint(int number) {
-    number_of_breakpoints++;
-    while(button != button_mode){
+    number_of_breakpoints++; //increment number of breakpoints
+    while(button != button_mode){ //wait until is released in case that button was pushed at the begining of breakpoint
         wait(0.1);    
     }
-    wait(0.1);
+    wait(0.1); //debounce time
     end_breakpoint = false;    
-    button.enable_irq();
-    while (!end_breakpoint){
+    button.enable_irq(); //enable interrupt for button
+    while (!end_breakpoint){ // LED is periodically flashing until the button is pushed
         if (number > 0){    // the number was inserted
             flash_n_times(150,number);
         }else{           // number was not inserted
@@ -47,20 +46,20 @@
 //------------------------------------------------------------------------------------------------------------------
 void Debug_led::flash_n_times(int wait_time_ms, int n) {
     led = 0;
-    wait_ms(4*wait_time_ms);
+    wait_ms(4*wait_time_ms);// wait for visibility of periodical flashing
     for(int i = 0; i < n; i++){
         led = 1;
         wait_ms(wait_time_ms);
         led = 0;
         wait_ms(wait_time_ms);
     }
-    wait_ms(3*wait_time_ms);
+    wait_ms(3*wait_time_ms);// wait for visibility of periodical flashing
 }
 
-// flash n times with breakpoint led
+// IRQ function after pushing the button
 //------------------------------------------------------------------------------------------------------------------
 void Debug_led::end_break() {
-    button.disable_irq();
+    button.disable_irq(); //disable interrupt until the next breakpoint
     end_breakpoint = true;    
 }