写入I / O端口控制器驱动程序(输入)(PS / 2键盘端口)按下左右键盘键?

时间:2014-01-03 21:05:34

标签: c++ io keyboard hardware-interface ioports

我正在使用inpout32/64硬件I / O端口控制器使用此系统驱动程序InpOut32 and InpOutx64

我正在尝试使用它来绕过我在DirectInput游戏中遇到的问题 (不能使用SendInput,因为它会在没有很长睡眠延迟的情况下拒绝输入,而且我不能等待那么长时间它必须是非常快速的键盘输入。)

我目前只有inpout32为我的所有键盘按键工作,我无法弄清楚如何访问左/右箭头键。

查看此网页有关PS / 2键盘PS/2 Keyboard commands

的信息

想出这就是我需要的东西

0xE0, 0x4B   cursor left pressed
0xE0, 0x4D   cursor right pressed

我如何发送这两个,我不明白是什么0xE0我猜测它是扫描代码而0x4B0x4D是其中的位置扫描代码,但它在我的示例中不起作用,它继续为LEFT键发送\

这是我正在使用的代码

BOOL isDriverOn = false;
#define LEFT 0x4B 
#define RIGHT 0x4D 

void setup() {
        isDriverOn = IsInpOutDriverOpen();
}

//void  _stdcall Out32(short PortAddress, short data);
//short _stdcall Inp32(short PortAddress);
void DD_PS2command(short comm, short value) {
        if(!isDriverOn) {
            printf("PS/2 Keyboard port driver is not opened\n");
            return;
        }
        //keyboard wait.
        int kb_wait_cycle_counter = 1000;
        while((Inp32(0x64) & 0x02) && kb_wait_cycle_counter--) //wait to get communication.
            Sleep(1);
        if(kb_wait_cycle_counter) { //if it didn't timeout.
            Out32(0x64, comm); //send command
            kb_wait_cycle_counter = 1000;
            while((Inp32(0x64) & 0x02) && kb_wait_cycle_counter--) //wait to get communication.
                Sleep(1);
            if(!kb_wait_cycle_counter) {
                printf("failed to get communication in cycle counter timeout), who knows what will happen now\n");
                //return false;
            }
            Out32(0x60, value); //send data as short
            Sleep(1);
            //return true;
        } else {
            printf("failed to get communication in counter timeout, busy)\n");
            //return false;
        }
}

void DD_Button(short btn, bool release = false, int delay = 0)
{
  //0xE0, 0x4B   {Left}
  //0xE0, 0x4D   {Rght}
  //return scode | (release?0x80:0x00);
  short scan_code = 0;
  if(btn == LEFT)
      scan_code = LEFT + 0xE0;
  else if(btn == RIGHT)
      scan_code = RIGHT + 0xE0;
  else
      scan_code = 0x0;

  scan_code |= (release ? 0x80 : 0x00);

  if(delay)  
    Sleep(delay);
  DD_PS2command(0xD2, scan_code);
}




编辑:问题解决了,下面这个函数有效,只需要让DD_PS2command返回true / false(表示它是否通过)。
新问题它会立即释放密钥而不会按住密钥。

以下是所有键http://www.computer-engineering.org/ps2keyboard/scancodes1.html

void DD_Button(short btn, bool release = false, int delay = 0)
{
  //;0xE0, 0x4B      {Left}
  //;0xE0, 0x4D      {Rght}
  //  return scode | (release? 0x80: 0x00)
  short scan_code = 0;
  bool good = false;
  switch(btn) {
    case LEFT:
    case RIGHT:
        scan_code = btn;
        //send extended byte first (grey code)
        good = DD_PS2command(0xD2, 0xE0);
        break;
  }
  printf("good = %d\n", good);
  scan_code |= (release ? 0x80 : 0x00);

  if(delay)  
    Sleep(delay);
  //0xD2 - Write keyboard output buffer
  good = DD_PS2command(0xD2, scan_code);
  printf("2 good = %d\n", good);
}

1 个答案:

答案 0 :(得分:1)

0xE0是扩展密钥的转义码 - 例如,对于左侧,您发送0xE0,然后立即发送0x4B