Altera DE2-115 Guia do Utilizador descarregar pdf (Página 66)

SFSU - Embedded Systems Tutorial Nano- Electronics & Computing Research Lab

sprintf (text,"%d & %d = %d ",number1,number2,number1 & number2);

}

else

{

sprintf( text_top_VGA, "My ALU");

sprintf (text,"%d | %d = %d ",number1,number2,number1 | number2);

}

Characters are written on the screen through “VGA_text” function.

void VGA_text(int x, int y, char * text_ptr)

{

int offset;

volatile char * character_buffer = (char *) 0x00101000; // VGA character buffer

offset = (y << 7) + x;

while ( *(text_ptr) )

{

*(character_buffer + offset) = *(text_ptr); // write to the character buffer

++text_ptr;

++offset;

}

You can obtain the software code by opening the main.c file which is attached with this

tutorial.

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Altera DE2-115 Guia do Utilizador Página 66