806_tv.c

来自「一个关于s1d13806的应用程序」· C语言 代码 · 共 32 行

/*-------------------------------------------------------------------------*/
void seTvDisplayEnable(BOOL activate, BOOL FlickerFilter)
    {
    unsigned byte1fc,byte18;

    // Enable/disable TV
   
    byte1fc = seReadRegByte(0x1FC);
  
    if (activate) // Enable TV output
        {
        byte1fc |= 0x04;
        if (FlickerFilter)
           byte1fc |= 0x02;
        else
           byte1fc &= ~0x02;
        }
    else         // Disable TV output
        byte1fc &= ~0x6;
    
    // Process the *2 Pixel Clock bit
    
    byte18  = seReadRegByte(0x18);
    if (byte1fc & 0x4)          // Flicker Filter On: Must also enable *2 clock
        byte18 |= 0x80;
    else                        // Flicker Filter Off: Must also disable *2 clock
        byte18 &= ~0x80;

    seWriteRegByte(0x18, byte18);
    seWriteRegByte(0x1FC, byte1fc);
    }