From 6557987cfdec4b55ee89faa676d8b4c969095942 Mon Sep 17 00:00:00 2001
From: Daniel Kulp <dan@kulp.com>
Date: Tue, 19 Sep 2023 14:13:39 -0400
Subject: [PATCH] Fix C compile of oled files

---
 src/oled/I2C.h          | 10 +++++++++-
 src/oled/SSD1306_OLED.c |  8 +++-----
 src/oled/SSD1306_OLED.h |  9 +++++++++
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/src/oled/I2C.h b/src/oled/I2C.h
index 392fb69d0..63fd797ed 100644
--- a/src/oled/I2C.h
+++ b/src/oled/I2C.h
@@ -31,6 +31,10 @@ SOFTWARE.
 
 #include<stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* No. of bytes per transaction */
 #define I2C_ONE_BYTE                     1
 #define I2C_TWO_BYTES                    2
@@ -57,9 +61,13 @@ extern int i2c_read(int fd, unsigned char *read_data);
 extern int i2c_read_register(int fd, unsigned char read_addr, unsigned char *read_data);
 extern int i2c_read_registers(int fd, int num, unsigned char starting_addr,
 		unsigned char *buff_Ptr);
-extern void config_i2c_struct(char *i2c_dev_path, unsigned char slave_addr, I2C_DevicePtr i2c_dev);
+extern void config_i2c_struct(const char *i2c_dev_path, unsigned char slave_addr, I2C_DevicePtr i2c_dev);
 extern int i2c_multiple_writes(int fd, int num, unsigned char *Ptr_buff);
 extern int i2c_write_register(int fd, unsigned char reg_addr_or_cntrl, unsigned char val);
 
 /* Exposed I2C-x Specific Functions */
 extern int init_i2c_dev2(const char *i2cPath, unsigned char slave_address);
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/src/oled/SSD1306_OLED.c b/src/oled/SSD1306_OLED.c
index 8a1863bd4..3f4e4636a 100644
--- a/src/oled/SSD1306_OLED.c
+++ b/src/oled/SSD1306_OLED.c
@@ -57,16 +57,14 @@ int LED_DISPLAY_TYPE = LED_DISPLAY_TYPE_SSD1306;
 
 /* static Variables */
 static unsigned char _rotation = 0,textsize = 0;
-static short _width = LED_DISPLAY_WIDTH;
-static short _height = LED_DISPLAY_HEIGHT;
+static short _width = 128;
+static short _height = 64;
 static short cursor_x = 0, cursor_y = 0, textcolor = 0, textbgcolor = 0;
 static bool _cp437 = false, wrap = true;
 
 
-
-
 /* static struct objects */
-static const GFXfont *gfxFont = nullptr;
+static const GFXfont *gfxFont = 0;
 
 void setTextFont(const GFXfont *font) {
     gfxFont = font;
diff --git a/src/oled/SSD1306_OLED.h b/src/oled/SSD1306_OLED.h
index b7d6bd9a1..28404b693 100644
--- a/src/oled/SSD1306_OLED.h
+++ b/src/oled/SSD1306_OLED.h
@@ -32,6 +32,11 @@ SOFTWARE.
 
 /* Lib's */
 #include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "gfxfont.h"
 
 /* Find Min and Max - MACROS */
@@ -178,3 +183,7 @@ extern short printNumber_I(int n, int base);
 extern short printNumber_I_ln(int n, int base);
 extern short printFloat(double number, unsigned char digits);
 extern short printFloat_ln(double num, int digits);
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file