indent code with clang-format, add rotation

Code/thermal_printer/utils.h

@@ -1,19 +1,26 @@
 #ifndef UTILS_H
 #define UTILS_H
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdint.h> 
 #include <string.h>
 
 #include <wiringPi.h>
 
 #define SEP printf(" ");
 // a is string, b is number
-#define DEBUG(a,b) printf(a);SEP;printf("%d\n",b);
+#define DEBUG(a, b)                                                            \
+  printf(a);                                                                   \
+  SEP;                                                                         \
+  printf("%d\n", b);
 
 #define ALINE printf("\n");
 
-#define PRINTF(...) { printf(__VA_ARGS__);fflush(stdout);}
+#define PRINTF(...)                                                            \
+  {                                                                            \
+    printf(__VA_ARGS__);                                                       \
+    fflush(stdout);                                                            \
+  }
 
 void delayus(unsigned int _us);
 
@@ -21,5 +28,4 @@ uint8_t invert_bit(uint8_t a);
 
 uint8_t bits_number(uint8_t n);
 
-
 #endif