ayuda el siguiente codigo me da error y al parecer no me falta nada...
private unsafe void leeComs_Click(object sender, System.EventArgs e)
{
int *ptraddr; /* apuntador a la localidad de las direcciones del puerto */
int address; /* direccion del puerto */
int a;
//*ptraddr=(uint *)0x00000400;
ptraddr=(int*)0x00000400;
for (a = 0; a < 4; a++)
{
address = *ptraddr;
if (address == 0)
{
desplegar.Text="No port found for COM%d \n" + (a+1);
}
else
{
desplegar.Text="Address assigned to COM" + (a+1)+ "is" + address +"Xh\n";
}
(*ptraddr)++;
}
}
alguna idea please
An unhandled exception of type 'System.NullReferenceException' occurred in leerCom.exe
Additional information: Object reference not set to an instance of an object.
