806_crt.c

来自「一个关于s1d13806的应用程序」· C语言 代码 · 共 18 行

//-------------------------------------------------
//
//----------------------------------------------
void seCrtDisplayEnable(BOOL activate)
    {
    unsigned byte1fc;
    
    // Make sure the PAL TV bit [Reg[5B] bit 0] is clear.
    
    seWriteRegByte(0x5B, seReadRegByte(0x5B) & ~0x01);
    
    byte1fc = seReadRegByte(0x1FC);  // REG_DISPLAY_MODE
    byte1fc &= ~0x06;                // disable CRT & TV,preserve the LCD on bit
    if (activate)
        byte1fc |= 0x2;              // enable CRT
    seWriteRegByte(0x1FC, byte1fc);  // enable or disable CRT display
    }