From 1058d8147438a9801f6df3e4890957c3ef7d9a37 Mon Sep 17 00:00:00 2001
From: JonWoellhaf <jonwoellhaf@comcast.net>
Date: Sat, 14 Nov 2020 21:47:05 -0700
Subject: [PATCH 1/2] Create .project

---
 .project | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 .project

diff --git a/.project b/.project
new file mode 100644
index 0000000..ed8dc0b
--- /dev/null
+++ b/.project
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>electronic-leadscrew</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>

From 092d6769125f70fc993bb5d548e50f59a17da470 Mon Sep 17 00:00:00 2001
From: JonWoellhaf <jonwoellhaf@comcast.net>
Date: Sat, 14 Nov 2020 22:25:17 -0700
Subject: [PATCH 2/2] Rhythmically blink LED4 (red) and LED5 (green) on the TI
 LAUNCHXL-F280049C board. This allows those who do not have an oscilloscope to
 verify the user interface loop is running.

---
 els-f280049c/Debug.cpp | 12 ++++++++++++
 els-f280049c/Debug.h   | 28 ++++++++++++++++++++++++++++
 els-f280049c/main.cpp  |  3 +++
 3 files changed, 43 insertions(+)

diff --git a/els-f280049c/Debug.cpp b/els-f280049c/Debug.cpp
index 3da41e7..0da10c9 100644
--- a/els-f280049c/Debug.cpp
+++ b/els-f280049c/Debug.cpp
@@ -35,13 +35,25 @@ Debug :: Debug( void )
 
 void Debug :: initHardware( void )
 {
+    // Initialize GPIO
+    // Doesn't work if put after EALLOW
+    InitGpio();
+
     // set up GPIO pins as output for debugging
     EALLOW;
+
     GpioCtrlRegs.GPAMUX1.bit.GPIO2 = 0;
     GpioCtrlRegs.GPADIR.bit.GPIO2 = 1;
     GpioDataRegs.GPACLEAR.bit.GPIO2 = 1;
+
     GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 0;
     GpioCtrlRegs.GPADIR.bit.GPIO3 = 1;
     GpioDataRegs.GPACLEAR.bit.GPIO3 = 1;
+
+    // LED4 on LAUNCHXL (red)
+    GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 0;
+    GpioCtrlRegs.GPADIR.bit.GPIO23 = 1;
+    GpioDataRegs.GPACLEAR.bit.GPIO23 = 1;
+
     EDIS;
 }
diff --git a/els-f280049c/Debug.h b/els-f280049c/Debug.h
index 993e032..2782843 100644
--- a/els-f280049c/Debug.h
+++ b/els-f280049c/Debug.h
@@ -31,6 +31,9 @@
 
 class Debug
 {
+private:
+    Uint16 heartbeatCount;
+
 public:
     Debug(void);
     void initHardware(void);
@@ -42,6 +45,8 @@ class Debug
     // analyzer pin 2
     void begin2( void );
     void end2( void );
+
+    void heartbeat( void );
 };
 
 
@@ -65,5 +70,28 @@ inline void Debug :: end2( void )
     GpioDataRegs.GPACLEAR.bit.GPIO3 = 1;
 }
 
+inline void Debug :: heartbeat( void )
+{
+    ++heartbeatCount;
+
+    if (heartbeatCount > 50)
+    {
+        heartbeatCount = 1;
+    }
+
+    if (heartbeatCount == 15)
+    {
+        // Turn off red LED and turn on green LED
+        GpioDataRegs.GPASET.bit.GPIO23 = 1;
+        GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;
+    }
+
+    if (heartbeatCount == 1)
+    {
+        // Turn on red LED and turn off green LED
+        GpioDataRegs.GPACLEAR.bit.GPIO23 = 1;
+        GpioDataRegs.GPBSET.bit.GPIO34 = 1;
+    }
+}
 
 #endif // __DEBUG_H
diff --git a/els-f280049c/main.cpp b/els-f280049c/main.cpp
index 24c4872..fe28342 100644
--- a/els-f280049c/main.cpp
+++ b/els-f280049c/main.cpp
@@ -139,6 +139,9 @@ void main(void)
         // mark beginning of loop for debugging
         debug.begin2();
 
+        // service heartbeat
+        debug.heartbeat();
+
         // service the user interface
         userInterface.loop();