Benjamin Leverett / Mbed 2 deprecated CHEN_Final_Project

Semaphore attempt ben

Dependencies:   mbed mbed-rtos 4DGL-uLCD-SE SDFileSystem ATParser

Files at this revision

API Documentation at this revision

Revision 5:dc2f1a9c92a2, committed 2020-04-29

Comitter:
bleverett3
Date:
Wed Apr 29 01:24:34 2020 +0000
Parent:
4:57e7983c861c
Commit message:
Semaphore

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 57e7983c861c -r dc2f1a9c92a2 main.cpp
--- a/main.cpp	Mon Apr 27 21:04:46 2020 +0000
+++ b/main.cpp	Wed Apr 29 01:24:34 2020 +0000
@@ -36,6 +36,8 @@
 
 //RTOS Mutex Lock
 Mutex mutex_lock;
+uint16_t max_count = 1;
+Semaphore lcd_sem(1);
 
 time_t seconds;
 
@@ -58,6 +60,7 @@
 void parse_RSSI()
 {
     mutex_lock.lock();
+    lcd_sem.wait();
     at.send("AT+BLEGETRSSI") && at.read(buffer, 10);
     if(buffer[0] == '-') {
         datalogged = 1;
@@ -72,6 +75,7 @@
             RSSI_array[averageCount] = total;
         }
         averageCount++;
+        int temp_risk = risk_level;
         if(averageCount > 15 && buffer[0] == '-') {
             averageCount = 0;
             int average = calculate_average(RSSI_array, 15);
@@ -85,6 +89,9 @@
                 risk_level = 0;
             }
         }
+        if (temp_risk != risk_level) {
+            lcd_sem.release();
+        }
         pc.printf("Risk level: ");
         pc.printf("%i\n", risk_level);
     } else {
@@ -179,6 +186,7 @@
     mutex_lock.unlock();
     while(1) {
         mutex_lock.lock();
+        lcd_sem.wait();
         if(risk_level <= 1 && datalogged) {
             mutex_lock.lock();
             uLCD.cls();
@@ -210,6 +218,7 @@
             uLCD.printf("Hazard");
             mutex_lock.unlock();
         }
+        lcd_sem.release();
         mutex_lock.unlock();
     }
 }