From a55b2bd07ecda3161289925fdadbad0f41ee1d7d Mon Sep 17 00:00:00 2001
From: Giulio Moro <giuliomoro@yahoo.it>
Date: Tue, 10 Sep 2019 16:27:33 +0000
Subject: [PATCH] Added includes to avoid compiler warnings

---
 Example_Code/Main.c                 |  1 +
 Example_Code/example_app.c          | 20 ++------------------
 Example_Code/example_app.h          | 18 ++++++++++++++++++
 I2C_Library/I2C.c                   |  1 +
 SSD1306_OLED_Library/SSD1306_OLED.c |  1 +
 5 files changed, 23 insertions(+), 18 deletions(-)
 create mode 100644 Example_Code/example_app.h

diff --git a/Example_Code/Main.c b/Example_Code/Main.c
index aa0407f..78c8fe8 100644
--- a/Example_Code/Main.c
+++ b/Example_Code/Main.c
@@ -17,6 +17,7 @@
 /* Header Files */
 #include "I2C.h"
 #include "SSD1306_OLED.h"
+#include "example_app.h"
 
 /* Externs - I2C.c */
 extern I2C_DeviceT I2C_DEV_2;
diff --git a/Example_Code/example_app.c b/Example_Code/example_app.c
index ccec39e..a090464 100644
--- a/Example_Code/example_app.c
+++ b/Example_Code/example_app.c
@@ -34,7 +34,9 @@ SOFTWARE.
 #include <string.h>
 #include <stdint.h>
 #include  <signal.h>
+#include <unistd.h>
 #include "SSD1306_OLED.h"
+#include "example_app.h"
 
 /* MACRO's */
 #define LOGO16_GLCD_HEIGHT 16
@@ -47,24 +49,6 @@ SOFTWARE.
 /* Extern volatile */
 extern volatile unsigned char flag;
 
-/* Function Declarations */
-void testdrawline();
-void testdrawrect();
-void testfillrect();
-void testdrawcircle();
-void testdrawroundrect();
-void testdrawtriangle();
-void testfilltriangle();
-void testdrawchar();
-void testscrolltext();
-void display_texts();
-void display_texts();
-void display_bitmap();
-void display_invert_normal();
-void testdrawbitmap(const unsigned char *bitmap, unsigned char w, unsigned char h);
-void testdrawbitmap_eg();
-void deeplyembedded_credits();
-
 /* Bit Map - Taken from Adafruit SSD1306 OLED Library  */
 static const unsigned char logo16_glcd_bmp[] =
 {
diff --git a/Example_Code/example_app.h b/Example_Code/example_app.h
new file mode 100644
index 0000000..910e697
--- /dev/null
+++ b/Example_Code/example_app.h
@@ -0,0 +1,18 @@
+void testdrawline();
+void testdrawrect();
+void testfillrect();
+void testdrawcircle();
+void testdrawroundrect();
+void testfillroundrect();
+void testdrawtriangle();
+void testfilltriangle();
+void testdrawchar();
+void testscrolltext();
+void display_texts();
+void display_texts();
+void display_bitmap();
+void display_invert_normal();
+void testdrawbitmap(const unsigned char *bitmap, unsigned char w, unsigned char h);
+void testdrawbitmap_eg();
+void deeplyembedded_credits();
+ 
diff --git a/I2C_Library/I2C.c b/I2C_Library/I2C.c
index 07c0c97..8112c14 100644
--- a/I2C_Library/I2C.c
+++ b/I2C_Library/I2C.c
@@ -34,6 +34,7 @@ SOFTWARE.
 #include<stdio.h>
 #include<fcntl.h>
 #include<sys/ioctl.h>
+#include <unistd.h>
 #include <linux/i2c-dev.h>
 // heuristic to guess what version of i2c-dev.h we have:
 // the one installed with `apt-get install libi2c-dev`
diff --git a/SSD1306_OLED_Library/SSD1306_OLED.c b/SSD1306_OLED_Library/SSD1306_OLED.c
index e4de9a9..89847c9 100644
--- a/SSD1306_OLED_Library/SSD1306_OLED.c
+++ b/SSD1306_OLED_Library/SSD1306_OLED.c
@@ -34,6 +34,7 @@ SOFTWARE.
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
+#include <math.h>
 #include "I2C.h"
 #include "SSD1306_OLED.h"
 #include "gfxfont.h"