Add utilities functions

src/bringelle.c

@@ -1,11 +1,8 @@
 #include "utils/print.h"
 
-
-
-
 void bringelle(){
-  putchar('L');
+  clear();
-  putchar('L');
+  print("Booting Bringelle...");
 
   while(1);
 }

src/utils/print.c

@@ -1,7 +1,51 @@
 #include "print.h"
+#include "types.h"
+
+#define MAX_COL 80
+#define MAX_LINE 25
+
+char *video=(char *)0xB8000;
+u8 col=0;
+u8 line=0;
 
 
 void putchar(char c){
-  char *video=(char *)0xB8000;
+  // Print char
-  video[0]=c;
+  video[col*2+MAX_COL*line*2]=c;
+  // Refresh location
+  col+=1;
+  if(col>= MAX_COL){
+    col=0;
+    line+=1;
+    if(line>=MAX_LINE){
+      line=MAX_LINE-1;
+      scrollup();
+    }
+  }
+}
+
+void print(char *str){
+  int i=0;
+  while(str[i]!='\0'){
+    putchar(str[i]);
+    i++;
+  }
+}
+
+void clear(){
+  for(char i=0;i<MAX_LINE;i++){
+    scrollup();
+  }
+}
+
+void scrollup(){
+  // Move line up
+  for(char i=1;i<=MAX_LINE;i++){
+    for(char j=0;j<=MAX_COL;j++)
+      video[j*2+MAX_COL*(i-1)*2]=video[j*2+MAX_COL*i*2];
+  }
+  // Clear last line
+  for(char i=0;i<=MAX_COL;i++){
+    video[col*2+MAX_COL*(MAX_LINE-1)*2]='\0';
+  }
 }

src/utils/print.h

@@ -2,6 +2,12 @@
 #define PRINT_H
 
 
+/**
+ * Print char
+ */
 void putchar(char);
+void print(char*);
+void scrollup();
+void clear();
 
 #endif

src/utils/types.h

@@ -0,0 +1,8 @@
+#ifndef TYPES_H
+#define TYPES_h
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#endif