/*
  Structures and functions to allow the ARM9 to send commands to the
  ARM7. Based on code from the MOD player example posted to the GBADEV
  forums.
*/
#include <nds.h>
#include <string.h>
#include "command.h"

void CommandInit() {
  memset(commandControl, 0, sizeof(CommandControl));  
}

void CommandFIFOInit()
{
  Command* command = &commandControl->command[commandControl->currentCommand];
  command->commandType = FIFO_INIT; 
  commandControl->currentCommand++;
  commandControl->currentCommand &= MAX_COMMANDS-1;
}

void CommandFIFOSend()
{
  Command* command = &commandControl->command[commandControl->currentCommand];
  command->commandType = FIFO_SEND; 
  commandControl->currentCommand++;
  commandControl->currentCommand &= MAX_COMMANDS-1;
}

void CommandFIFORecv()
{
  Command* command = &commandControl->command[commandControl->currentCommand];
  command->commandType = FIFO_RECV; 
  commandControl->currentCommand++;
  commandControl->currentCommand &= MAX_COMMANDS-1;
}