Add SET key functionality

.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>

els-f280049c/ControlPanel.cpp

@@ -293,13 +293,44 @@ void ControlPanel :: setMessage( const Uint16 *message )
     this->message = message;
 }
 
+void ControlPanel :: increaseBrightness()
+{
+    ++brightness;
+
+    if (brightness == 5) brightness = 8;
+
+    setBrightness(brightness);
+}
+
+void ControlPanel :: decreaseBrightness()
+{
+    --brightness;
+
+    if(brightness == 7) brightness = 4;
+
+    setBrightness(brightness);
+}
+
 void ControlPanel :: setBrightness( Uint16 brightness )
+//  Because of the screwy way the TM1638 controls brightness in steps of 1/16,
+//      2/16, 4/16, 10/16, 11/16, 12/16, 13/16, and 14/16,
+//      there are really only five distinct levels.
+//  Limit brightness value sent to control panel to 1, 2, 3, 4, or 8.
+//      0 = off.
+//      5, 6, and 7 are indistinguishable from 4.
 {
+    if (brightness == 0) brightness = 1;
+
     if( brightness > 8 ) brightness = 8;
 
     this->brightness = brightness;
 }
 
+Uint16 ControlPanel :: getBrightness(void)
+{
+    return this->brightness;
+}
+
 void ControlPanel :: refresh()
 {
     configureSpiBus();

els-f280049c/ControlPanel.h

@@ -30,6 +30,16 @@
 #include "F28x_Project.h"
 #include "SPIBus.h"
 
+// Seven segment display segment mapping:
+//
+//  MSb 7 6 5 4 3 2 1 0  x x x x x x x x LSb
+//
+//     7
+//  2     6
+//     1
+//  3     5
+//     4
+//           0
 
 #define ZERO    0b1111110000000000 // 0
 #define ONE     0b0110000000000000 // 1
@@ -44,32 +54,60 @@
 #define POINT   0b0000000100000000 // .
 #define BLANK   0b0000000000000000
 
+// Some lowercase letters have to be the same as the
+//      uppercase letter.
 #define LETTER_A 0b1110111000000000
+#define LETTER_a 0b1111101000000000
 #define LETTER_B 0b0011111000000000
+#define LETTER_b 0b0011111000000000
 #define LETTER_C 0b1001110000000000
+#define LETTER_c 0b0011001000000000
 #define LETTER_D 0b0111101000000000
+#define LETTER_d 0b0111101000000000
 #define LETTER_E 0b1001111000000000
+#define LETTER_e 0b1001111000000000
 #define LETTER_F 0b1000111000000000
+#define LETTER_f 0b1000111000000000
 #define LETTER_G 0b1011110000000000
+#define LETTER_g 0b1011110000000000
 #define LETTER_H 0b0110111000000000
+#define LETTER_h 0b0010111000000000
 #define LETTER_I 0b0000110000000000
+#define LETTER_i 0b0010000000000000
 #define LETTER_J 0b0111100000000000
+#define LETTER_j 0b0111100000000000
 #define LETTER_K 0b1010111000000000
+#define LETTER_k 0b1010111000000000
 #define LETTER_L 0b0001110000000000
+#define LETTER_l 0b0001110000000000
 #define LETTER_M 0b1010100000000000
+#define LETTER_m 0b1010100000000000
 #define LETTER_N 0b1110110000000000
+#define LETTER_n 0b0010101000000000
 #define LETTER_O 0b1111110000000000
+#define LETTER_o 0b0011101000000000
 #define LETTER_P 0b1100111000000000
+#define LETTER_p 0b1100111000000000
 #define LETTER_Q 0b1110011000000000
+#define LETTER_q 0b1110011000000000
 #define LETTER_R 0b1100110000000000
+#define LETTER_r 0b0000101000000000
 #define LETTER_S 0b1011011000000000
+#define LETTER_s 0b1011011000000000
 #define LETTER_T 0b0001111000000000
+#define LETTER_t 0b0001111000000000
 #define LETTER_U 0b0111110000000000
+#define LETTER_u 0b0011100000000000
 #define LETTER_V 0b0111010000000000
+#define LETTER_v 0b0111010000000000
 #define LETTER_W 0b0101010000000000
+#define LETTER_w 0b0101010000000000
 #define LETTER_X 0b0110110000000000
+#define LETTER_x 0b0110110000000000
 #define LETTER_Y 0b0111011000000000
+#define LETTER_y 0b0111011000000000
 #define LETTER_Z 0b1101001000000000
+#define LETTER_z 0b1101001000000000
 
 #define DASH 0b0000001000000000
 
@@ -165,6 +203,7 @@ class ControlPanel
     void configureSpiBus(void);
     bool isValidKeyState(KEY_REG);
     bool isStable(KEY_REG);
+    void setBrightness(Uint16 x);
 
 public:
     ControlPanel(SPIBus *spiBus);
@@ -187,8 +226,11 @@ class ControlPanel
     // set a message that overrides the display, 8 characters required
     void setMessage(const Uint16 *message);
 
-    // set a brightness value, 0 (off) to 8 (max)
-    void setBrightness(Uint16 brightness);
+    Uint16 getBrightness(void);
+
+    void increaseBrightness(void);
+
+    void decreaseBrightness(void);
 
     // refresh the hardware display
     void refresh(void);

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;
 }

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