📄 mode_detect.lst
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782 3 // So usIPV_ACT_LEN should not be too larger than pre-set capture window length
783 3 if (Mode_Preset[Wait_Time_Cnt][2] > usIPV_ACT_LEN || (CAP_WIN[Wait_Time_Cnt][4] + 24) < usIPV_
-ACT_LEN) continue;
784 3 }
785 2 else
786 2 {
787 3 if (Mode_Preset[Wait_Time_Cnt][2] < usIPV_ACT_LEN) continue;
788 3 }
789 2
790 2 ((unsigned int *)Data)[0] = (unsigned long)(RTD_XTAL / 10) * Mode_Preset[Wait_Time_Cnt][0]
791 2 * Mode_Preset[Wait_Time_Cnt][2] / ((unsigned long)100 * usIPV_ACT_LEN
-* usHsync);
792 2
793 2 // Return if we find out a suitable user-mode.
794 2 if (MAX_DCLK > ((unsigned int *)Data)[0]) return Wait_Time_Cnt;
795 2 }
796 1 while (MODE_USER1600x1200 >= ++Wait_Time_Cnt);
797 1
798 1 Wait_Time_Cnt = MODE_NOSUPPORT;
799 1
800 1 #if (PARTIAL_DISP)
// If failed, we try partial-screen display.
Wait_Time_Cnt = Partial_Display();
#endif
804 1
805 1 return Wait_Time_Cnt;
806 1
807 1 #else
return MODE_NOSIGNAL;
#endif
812 1 }
813
814 /////////////////////////////////////////////////////////
815 //------------------ Detect VIDEO Mode ----------------//
816 /////////////////////////////////////////////////////////
817 #if (VIDEO_CHIP != VDC_NONE)
void Detect_Video_Mode(void)
{
I2CRead(ADDR_VIDEO, 0x1f, 0x01);
//------ Check Horizontal Lock & Frequency ------
if (0 == (Data[0] & 0x40))
{
if ((Data[0] & 0x20) && (0x01 != (ucAV_Mode & 0x0f)))
{
// Field rate changed to 60Hz
ucAV_Mode = 0x01;
ucMode_Found = MODE_NOSUPPORT;
ucMode_Times = 0;
Data[0] = 4;
Data[1] = ADDR_VIDEO;
Data[2] = 0x0e;
Data[3] = 0x08; // Start color search from NTSC-M
I2CWrite(Data);
}
else if ((0 == (Data[0] & 0x20)) && (0x02 != (ucAV_Mode & 0x02)))
{
// Field rate changed to 50Hz
C51 COMPILER V6.20c MODE_DETECT 04/15/2004 12:59:19 PAGE 15
ucAV_Mode = 0x02;
ucMode_Found = MODE_NOSUPPORT;
ucMode_Times = 0;
Data[0] = 4;
Data[1] = ADDR_VIDEO;
Data[2] = 0x0e;
Data[3] = 0x08; // Start color search from PAL-BDGHI
I2CWrite(Data);
}
else
{
//------ Check Lock Color ------
if (0x01 == (Data[0] & 0x01))
{
// Lock Color
if (ucAV_Mode & 0x01)
{
if (MODE_VIDEO60HZ == ucMode_Found)
{
ucMode_Times ++;
}
else
{
ucMode_Found = MODE_VIDEO60HZ;
ucMode_Times = 0;
}
}
else
{
if (MODE_VIDEO50HZ == ucMode_Found)
{
ucMode_Times ++;
}
else
{
ucMode_Found = MODE_VIDEO50HZ;
ucMode_Times = 0;
}
}
}
else
{
// Non Lock Color
if (MODE_NOSUPPORT != ucMode_Found)
{
ucMode_Found = MODE_NOSUPPORT;
ucMode_Times = 0;
}
Data[0] = 4;
Data[1] = ADDR_VIDEO;
Data[2] = 0x0e;
if (0x03 == (ucAV_Mode & 0x03))
{
// SECAM -> PAL-BDGHI(50Hz)
Data[3] = 0x08;
I2CWrite(Data);
ucAV_Mode = 0x02;
}
else
C51 COMPILER V6.20c MODE_DETECT 04/15/2004 12:59:19 PAGE 16
{
if (ucMode_Times & 0x01) // Every 2-times , change color
{
switch (ucAV_Mode & 0x70)
{
case 0x00:
Data[3] = 0x18; // NTSC-4.43(50Hz) // PAL-4.43(60Hz)
I2CWrite(Data);
ucAV_Mode = (ucAV_Mode & 0x0f) | 0x10;
break;
case 0x10:
Data[3] = 0x28; // PAL-N(50Hz) // NTSC-4.43(60Hz)
I2CWrite(Data);
ucAV_Mode = (ucAV_Mode & 0x0f) | 0x20;
break;
case 0x20:
Data[3] = 0x38; // NTSC-N(50Hz) // PAL-M(60Hz)
I2CWrite(Data);
ucAV_Mode = (ucAV_Mode & 0x0f) | 0x30;
break;
case 0x30:
if (ucAV_Mode & 0x02)
{
// NTSC-N -> SECAM (50Hz)
Data[3] = 0x5c;
I2CWrite(Data);
ucAV_Mode = 0x03;
}
else
{
// PAL-M -> NTSC_M (60Hz)
Data[3] = 0x08;
I2CWrite(Data);
ucAV_Mode = ucAV_Mode & 0x0f | 0x00;
}
default:
break;
}//end of "switch (ucAV_Mode & 0x70)"
}//end of "if (ucMode_Times & 0x01)"
}//end of "if (0x03 == (ucAV_Mode & 0x03)) else"
}//end of "Non Lock color
}//end of "Check Lock Color"
}//end of "if (0==(Data[0] & 0x40))"
else
{
// Non Horizontal Lock
ucAV_Mode = 0;
if (ucMode_Found != MODE_NOSUPPORT)
{
ucMode_Found = MODE_NOSUPPORT;
ucMode_Times = 0;
}
}
//-------------Check result--------------
if (MODE_NOSUPPORT != ucMode_Found)
{
if (VIDEO_SEARCH_TIMES < ucMode_Times)
{
bLIGHT_PWR = LIGHT_OFF; // Turn off BackLight for reset display
C51 COMPILER V6.20c MODE_DETECT 04/15/2004 12:59:19 PAGE 17
RTDSetByte(HOSTCTRL_02, 0x00); // Wake RTD up
RTDOSDW(OSD_Reset); // Clear OSD
if (SOURCE_YUV == (stGUD1.INPUT_SOURCE & 0x07))
ucMode_Curr = (ucAV_Mode & 0x02) ? MODE_YUV50HZ : MODE_YUV60HZ;
else
ucMode_Curr = ucMode_Found;
ucMode_Times = 0;
bStable = 0; // bStable must be cleared when mode changed
Display_Video_Set();
}
}
else
{
ucMode_Times ++;
if (ucAV_Mode)
{
// Force to display although we cannot lock color
if (VIDEO_SEARCH_TIMES < ucMode_Times
&& (NO_COLOR_TIMES < ucMode_Times || SOURCE_YUV == (stGUD1.INPUT_SOURCE & 0x07)))
{
bLIGHT_PWR = LIGHT_OFF; // Turn off BackLight for reset display
RTDSetByte(HOSTCTRL_02, 0x00); // Wake RTD up
RTDOSDW(OSD_Reset); // Clear OSD
ucAV_Mode = (ucAV_Mode & 0x02) ? 0x82 : 0x81;
if (SOURCE_YUV != (stGUD1.INPUT_SOURCE & 0x07))
ucMode_Curr = (ucAV_Mode & 0x02) ? MODE_VIDEO50HZ : MODE_VIDEO60HZ;
else
ucMode_Curr = (ucAV_Mode & 0x02) ? MODE_YUV50HZ : MODE_YUV60HZ;
ucMode_Times = 0;
bStable = 0; // bStable must be cleared when mode changed
Display_Video_Set();
}
}
else
{
if (NO_MODE_TIMES < ucMode_Times)
{
bStable = 1; // Set bStable to 1 when signal timing is stable.
ucMode_Times = NO_MODE_TIMES - 1;
}
}
}
}
/////////////////////////////////////////////////////////
//------------------- Check VIDEO Mode ----------------//
/////////////////////////////////////////////////////////
void Check_Video_Mode(void)
{
C51 COMPILER V6.20c MODE_DETECT 04/15/2004 12:59:19 PAGE 18
I2CRead(ADDR_VIDEO, 0x1f, 0x01);
// Check color
if (0 == (ucAV_Mode & 0x80))
{
if (0 == (Data[0] & 0x01)) ucMode_Curr = MODE_NOSIGNAL; // Color standard changed
}
else
{
if (0 == (Data[0] & 0x01))
{
ucMode_Times = 0;
}
else
{
// When we cannot lock color, we set color standard to PAL-BDGHI if field rate is 50Hz,
// and to NTSC-M if it is 60Hz.
// If we find color is locked, we should update ucAV_Mode to indicate we now get color.
if (VIDEO_SEARCH_TIMES < ++ucMode_Times) ucAV_Mode = ucAV_Mode & 0x0f;
}
}
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