Revision 9:cec9620ad205, committed 2020-04-10

Comitter:

hzsun

Date:

Fri Apr 10 01:02:40 2020 +0000

Parent:

8:1f2ac4a0744c

Commit message:

dada

Changed in this revision

--- a/main.cpp	Fri Apr 10 00:36:47 2020 +0000
+++ b/main.cpp	Fri Apr 10 01:02:40 2020 +0000
@@ -1,101 +1,113 @@
 #include "mbed.h"
 #include "wdt.h"
- 
- // ------------Fault Injection Button-------------
-// lab6 first part of the demostration, 
-//all the functions have been tested 
+
+// -----------DESCRIBTION-------------
+// lab6 second part of the demostration,
+//all the functions have been tested
 // -----------------------------------------------
 
-#define ON 1     
+#define ON 1
 #define OFF 0
 DigitalOut led_red(LED_RED, ON);
 DigitalIn button(PTD0, PullUp);
 DigitalOut led1(PTC12, OFF);
-DigitalOut led2(PTC13, OFF); // all the beginning sets 
+AnalogIn ain(A0) ;          // Analog input
 Serial pc(USBTX, USBRX); // tx, rx, useful for debugging
- 
 // This ticker is used to feed the watch dog
 Ticker tick;
- 
+
 // Threads
-Thread threadT ; // timer thread 
+Thread threadT ; // timer thread
 Thread threadLED1 ; // thread LED1
-Thread threadLED2 ; // thread LED2
- 
-# define ON1 0x01   
-# define ON2 0x02
-# define OFF1 0x04   
-# define OFF2 0x08
+Thread threadADC ;  //thread for ADC
+# define ON1 0x01
+# define OFF1 0x02
+
 EventFlags signals;  // event flags for signalling
- 
- 
-void waitButton() {
-    while (!button) ;  
+void waitButton()
+{
+    while (!button) ;
 }
- 
+
+float voltage;  //value for voltage
+int t;
 // ---Thread for controlling LED 1----------------
-//   Turn LED1 on/off in response to signals 
+//   Turn LED1 on/off in response to signals
 // -----------------------------------------------
-void led1_thread() {  // method to run in thread
+void led1_thread()    // method to run in thread
+{
     int evt ;
     while (true) {
         evt = signals.wait_any(ON1 | OFF1); // wait for either signal
         if (evt & ON1) led1 = ON ;
         if (evt & OFF1) led1 = OFF ;
-        wdt_kickA();
-        //waitButton() ;  // POSSIBLE FAULT HERE
+        waitButton() ;  // POSSIBLE FAULT HERE
     }
 }
- 
+
 // ---Thread for controlling LED 2----------------
-//   Turn LED2 on/off in response to signals 
+//   Turn LED2 on/off in response to signals
 // -----------------------------------------------
-void led2_thread() {  // method to run in thread
+/*
+void led2_thread()    // method to run in thread
+{
     int evt ;
     while (true) {
         evt = signals.wait_any(ON2 | OFF2); // wait for any signal
         if (evt & ON2) led2 = ON ;
         if (evt & OFF2) led2 = OFF ;
         wdt_kickB();
-        //waitButton() ; // POSSIBLE FAULT HERE
-    }
-}
- 
-// ---Thread for timing --------------------------
-//   Send signals to the other threads
-// -----------------------------------------------
-void timer_thread() {  // method to run in thread
-    while (true) {
-        ThisThread::sleep_for(1000) ;
-        signals.set(ON1 | ON2) ;
-        ThisThread::sleep_for(1000) ;
-        signals.set(OFF1 | OFF2) ;
         waitButton() ; // POSSIBLE FAULT HERE
     }
 }
- 
+*/
+void adc_thread()   // method to run in thread
+{
+    while(true) {
+        voltage = ain.read()*3.3f;             //read from adc
+        if (t == 0 && voltage > 0) {          //if  led should be off and the volt is out of range
+            led_red = 0;                      //turn on internal led
+        }
+        if(t == 1 && (voltage < 1 || voltage > 2)) { //if  led should be on and the voltage is out of range
+            led_red = 0;                             //turn on internal led
+        }
+        pc.printf("currrnt_Voltage%3.3f%\n", voltage);   // print on the screen
+        ThisThread::sleep_for(1000) ;          //delay
+    }
+}
+
+// ---Thread for timing --------------------------
+//   Send signals to the other threads
+// -----------------------------------------------
+void timer_thread()    // method to run in thread
+{
+    while (true) {
+        ThisThread::sleep_for(1000) ;   //delay
+        signals.set(ON1) ;
+        t = 1;                       //check the signal
+        ThisThread::sleep_for(1000) ;    //delay
+        signals.set(OFF1) ;
+        t = 0;                       //check the signal
+    }
+}
+
 // -----------MAIN-------------------------------
-//    Configure watchdog. Start threads. 
-//    Show start up with RED for 1sec
-//    Remember the watchdog is running
-//       - 1024ms to set it once
-//       - then must feed it every 32ms  
+//run the three threads
 // ----------------------------------------------
- 
-int main(void) {
-    wdt_1sec() ; // initialise watchdog - 1sec timeout
-    wdt_kick_all() ;  
+
+int main(void)
+{
+    wdt_32ms() ; // initialise watchdog - 32ms timeout
+    wdt_kick_all() ;
+    tick.attach_us(callback(&wdt_kick_all), 20000); // ticks every 20ms
+
     // start threads
-    threadT.start(timer_thread) ; // start the timer thread 
-    threadLED1.start(led1_thread) ; // start the LED1 control thread 
-    threadLED2.start(led2_thread) ; // start the LED2 control thread    
-    // show start-up
-    led_red = OFF;
-    ThisThread::sleep_for(5000) ;
-    led_red = ON;
-    
+    threadT.start(timer_thread) ; // start the timer thread
+    threadLED1.start(led1_thread) ; // start the LED1 control thread
+    threadADC.start(adc_thread) ; // start the adc thread
+
     // main thread does nothing more
     while (true) {
-        ThisThread::sleep_for(10000) ; //delay 
+        ThisThread::sleep_for(10000) ; //delay
     }
 }
\ No newline at end of file