split out display code

stage2/include/colors.h

@@ -1,11 +0,0 @@
-#pragma once
-
-// Color definitions
-#define BLACK    0x0000
-#define BLUE     0x001F
-#define RED      0xF800
-#define GREEN    0x07E0
-#define CYAN     0x07FF
-#define MAGENTA  0xF81F
-#define YELLOW   0xFFE0 
-#define WHITE    0xFFFF

stage2/include/display.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <Adafruit_GFX.h>
+#include <Adafruit_ILI9341.h>
+#include <cstdint>
+
+namespace tft {
+
+    // Color definitions
+    constexpr uint16_t  BLACK = 0x0000;
+    constexpr uint16_t  BLUE = 0x001F;
+    constexpr uint16_t  RED = 0xF800;
+    constexpr uint16_t  GREEN = 0x07E0;
+    constexpr uint16_t  CYAN = 0x07FF;
+    constexpr uint16_t  MAGENTA = 0xF81F;
+    constexpr uint16_t  YELLOW = 0xFFE0 ;
+    constexpr uint16_t  WHITE = 0xFFFF;
+    constexpr uint16_t  LIGHT_GREY = 0xDEFB;
+    constexpr uint16_t  FOREGROUND = BLACK;
+    constexpr uint16_t  BACKGROUND = LIGHT_GREY;
+
+    void    Setup();
+    void    Clear();
+    void    SetCursor(int16_t x, int16_t y);
+    void    Println(const char *s);
+}

stage2/src/display.cc

@@ -0,0 +1,38 @@
+#include "display.h"
+
+
+namespace tft { 
+    constexpr uint8_t TFT_CS = 9;
+    constexpr uint8_t TFT_DC = 10;
+
+    static Adafruit_ILI9341 tft(TFT_CS, TFT_DC);
+
+
+    void
+    Setup()
+    {
+        tft.begin();
+        tft.setRotation(1);
+        tft.setTextSize(1);
+	    tft.setTextColor(FOREGROUND);
+        Clear();
+    }
+
+    void
+    Clear()
+    {
+        tft.fillScreen(BACKGROUND);
+    }
+
+    void
+    SetCursor(int16_t x, int16_t y)
+    {
+        tft.setCursor(x, y);
+    }
+
+    void
+    Println(const char *s)
+    {
+        tft.println(s);
+    }
+}

stage2/src/main.cc

@@ -2,15 +2,9 @@
 #include <Adafruit_ILI9341.h>
 #include <Fonts/FreeSans12pt7b.h>
 
-#include "colors.h"
+#include "display.h"
 #include "neopixel.h"
 
-#define TFT_CS 9
-#define TFT_DC 10
-#define BACKGROUND_COLOR	0xDEFB
-#define FOREGROUND_COLOR	BLACK
-
-Adafruit_ILI9341 tft(TFT_CS, TFT_DC);
 
 
 void
@@ -19,19 +13,14 @@ setup()
 	Serial.begin(115200);
 
 	neopxl::start();
+	tft::Setup;
+	tft::SetCursor(0, 8);
 
-	tft.begin();
-	tft.setRotation(1);
-	tft.setTextSize(1);
-	tft.setCursor(0, 8);
   	
-	tft.fillScreen(BACKGROUND_COLOR);
+  	tft::Println(" \\ (define square (x) (* x ))");
-	tft.setTextColor(FOREGROUND_COLOR);
+	tft::Println(" \\ (square 3)");
-  	
+	tft::Println(" 9");
-  	tft.println(" \\ (define square (x) (* x ))");
+	tft::Println(" \\ ");
-	tft.println(" \\ (square 3)");
-	tft.println(" 9");
-	tft.println(" \\ ");
 }