Cleaned up display code, and re-combined control code.

build.d

@@ -83,16 +83,20 @@ int flashCommand(string[] args) {
 }
 
 int build(bool force = false) {
+    import std.datetime.stopwatch;
     if (!exists(BUILD_DIR)) mkdir(BUILD_DIR);
     string[] sources = findFiles(SOURCE_DIR, ".c");
     string[] objects;
     objects.reserve(sources.length);
+    StopWatch sw = StopWatch(AutoStart.yes);
     foreach (source; sources) {
         objects ~= compileSourceToObject(source, force);
     }
     string elfFile = linkObjects(objects);
     string hexFile = copyToHex(elfFile);
-    writefln!"Built %s"(hexFile);
+    sw.stop();
+    ulong durationMillis = sw.peek().total!"msecs";
+    writefln!"Built %s in %d ms."(hexFile, durationMillis);
     runOrQuit("avr-size " ~ hexFile);
     return 0;
 }

src/display.c

@@ -1,18 +1,33 @@
 #include "display.h"
 
-struct st7735 lcd;
+struct signal cs = { .ddr = &DDRB, .port = &PORTB, .pin = 2 };
+// Back Light
+struct signal bl = { .ddr = &DDRB, .port = &PORTB, .pin = 1 };
+// Data / Command
+struct signal dc = { .ddr = &DDRB, .port = &PORTB, .pin = 0 };
+// Reset
+struct signal rs = { .ddr = &DDRD, .port = &PORTD, .pin = 7 };
+// LCD struct
+struct st7735 lcd = { .cs = &cs, .bl = &bl, .dc = &dc, .rs = &rs };
 
 void display_init() {
-  ST7735_Init (&display_lcd);
-  ST7735_CommandSend (&display_lcd, MADCTL);
-  ST7735_Data8BitsSend (&display_lcd, 0x00);
-  ST7735_ClearScreen (&display_lcd, BLACK);
-  ST7735_SetPosition (5, 10);
-  ST7735_DrawString (&display_lcd, "Testing", WHITE, X1);
+  ST7735_Init(&lcd);
+
+  // Set the display as vertical (top is the wired side).
+  ST7735_CommandSend(&lcd, MADCTL);
+  ST7735_Data8BitsSend(&lcd, 0x00);
+
+  ST7735_ClearScreen(&lcd, WHITE);
+  ST7735_SetPosition(1, 1);
+  ST7735_DrawString(&lcd, "Gympal", BLACK, X1);
+}
+
+struct st7735* display_get_lcd() {
+  return &lcd;
 }
 
 void display_show_str(char* str) {
-  ST7735_ClearScreen(&display_lcd, BLACK);
+  ST7735_ClearScreen(&lcd, BLACK);
   ST7735_SetPosition(5, 10);
-  ST7735_DrawString(&display_lcd, str, WHITE, X1);
+  ST7735_DrawString(&lcd, str, WHITE, X1);
 }

src/display.h

@@ -1,27 +1,21 @@
+/**
+ * @file display.h
+ * @author Andrew Lalis (andrewlalisofficial@gmail.com)
+ * @brief A wrapper around the hardware driver for the Gympal display which
+ * offers more abstract functions for controlling the state of the display.
+ */
 #ifndef DISPLAY_H
 #define DISPLAY_H
 
 #include "st7735.h"
 
-// A wrapper around the ST7735 library, which handles all of the gympal-specific display code.
-
-// Internal IO definition needed by the st7735 library.
-// Chip Select
-struct signal cs = { .ddr = &DDRB, .port = &PORTB, .pin = 2 };
-// Back Light
-struct signal bl = { .ddr = &DDRB, .port = &PORTB, .pin = 1 };
-// Data / Command
-struct signal dc = { .ddr = &DDRB, .port = &PORTB, .pin = 0 };
-// Reset
-struct signal rs = { .ddr = &DDRD, .port = &PORTD, .pin = 7 };
-// LCD struct
-struct st7735 display_lcd = { .cs = &cs, .bl = &bl, .dc = &dc, .rs = &rs };
-
 /**
  * @brief Initializes the display.
  */
 void display_init();
 
+struct st7735* display_get_lcd();
+
 void display_show_str(char* str);
 
 #endif

src/gympal.c

@@ -7,12 +7,12 @@
 int main() {
     display_init();
     ctl_init();
-    while (1) {
-      if (ctl_isButtonAPressed()) {
-        display_show_str("button A");
-      } else {
-        display_show_str("Not button A");
-      }
-    }
+    // while (1) {
+    //   if (ctl_isButtonAPressed()) {
+    //     display_show_str("button A");
+    //   } else {
+    //     display_show_str("Not button A");
+    //   }
+    // }
     return 0;
 }