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//#include <stdio.h>
#include "peripherie.h"
////////////////////////////////////////
// common defines
#define bit_is_set(mem, bv) (mem & bv)
#define bit_is_clear(mem, bv) (!(mem & bv))
#define loop_until_bit_is_set(mem, bv) do {} while( bit_is_clear(mem, bv))
#define loop_until_bit_is_clear(mem, bv) do {} while( bit_is_set(mem, bv))
uint8_t vga_line;
uint8_t vga_column;
void vga_init( void)
{
vga0->background_color = 0x00000000;
vga0->foreground_color = 0x0000ff00;
vga_line = 0;
vga_column = 0;
}
void vga_clear( void)
{
uint32_t count;
uint32_t count_max = 37*80;
for(count = 0; count< count_max; count++)
vga0->data = count<<8;
vga_line = 0;
vga_column = 0;
}
void vga_putchar( char c)
{
vga0->data = (( vga_line * 80 + vga_column)<<8) | c;
if ( (c == '\n') || (vga_column == 79) ) // line feed (+ carrige return)
{
if (vga_line<36)
vga_line++;
else
vga_line = 0;
vga_column = 0;
}
else if (c == '\f') // form feed
{
vga_clear();
}
else
{
vga_column++;
}
}
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