rearview.c

这是一个7"LCD 液晶屏显示器

/*Modified by Wayland 2006.10.26*/
#include "indash.h"

#ifdef  Rearview

/*added by Wayland 2006.10.26*/
extern	     bit       Rearview_OnOff;  
extern	     bit       Rearview_Enable;
//extern	     unsigned char   Save_CurrentState;
extern	     unsigned char cnt_low;
extern	     unsigned char cnt_high;
//extern         bit  	  power_state;
extern	     unsigned  char SPEAKER;
extern	     char  Current_Status;
extern	     char   IR_Data_OK_Flag;
extern	     char	IR_Repeat_Data_Flag;

void Rearview_Det(void)
{
   //bit  IR_state;
   static bit  speaker_state;
   static bit  power_state;
   EX0=0;
    if(Rearview_Enable)
    {
    	if(!REARVIEW_DET)//REARVIEW_DET  LOW
    	{
     	  	if(cnt_high==0)
	  	{
	   		if(cnt_low++>2)
	   		{
				if(!Rearview_OnOff)//Rearview mirror  haven't opened
				{
					//Save_CurrentState=Current_Status;
					//Current_Status=IS_REARVIEW;
					Rearview_OnOff=ON;
					if(!(speaker_state=SPEAKER))//if speaker open,close it.Otherwise don't care
					Mute_Enable();
					power_state=EEPROM_Receive_25_Bit(OP_READ, EE_POWER_STATUS_ADDR);
					if(power_state)//power  still  on
					{
						LIGHT_POWER=OFF;
						SOURCE_SEL=ON;
						Delay(10000);
						/*LIGHT_POWER=ON;
						Reset_OSD();
						Delay(1000);
						Current_Status=IS_NORMAL;*/
					}
					else //power  is off
					{
						Power_ON();
						SOURCE_SEL=ON;
						Delay(500);
						OSD_Init();
						DA_88347_Init();
						LIGHT_POWER=ON;
						Reset_OSD();
						Delay(1000);
						Current_Status=IS_NORMAL;
					}
					
				}
				else
				{
					cnt_low=0;
					Rearview_OnOff=ON;
					goto exit;
				}
	   		}
			else
			{	
				goto exit;
			}
	   		//Rearview_Enable=True;
	  	 }
	  	 else
	  	 {
			cnt_low=0;
			goto exit;
	  	 }	  
    	   }
    	else //REARVIEW_DET  high
    	{
         	if(cnt_low==0)
         	{
         		if(cnt_high++>2)
         		{
         			if(Rearview_OnOff)
         			{
         				if(!(speaker_state))
					Mute_Disable();
					if(power_state)
					{
						LIGHT_POWER=OFF;
						SOURCE_SEL=OFF;
						Delay(500);
						//SOURCE_SEL=OFF;
						Reset_OSD();
						Current_Status=IS_NORMAL;
						LIGHT_POWER=ON;
						Delay(1000);
					}
					else
					{
						LIGHT_POWER = DISABLE;
   						PANEL_POWER = DISABLE;
  						 INVER_POWER = DISABLE;
   						FM_POWER      = DISABLE;
   						LED_POWER     = 1;   
						SOURCE_SEL=OFF;
  						Current_Status = IS_POWER_OFF;
   						EEPROM_Transmit_25_Bit(OP_WRITE, EE_POWER_STATUS_ADDR, OFF);
   						IR_Repeat_Data_Flag = False;
   						IR_Data_OK_Flag = False;
   						Delay(1000); 
					}
					Rearview_OnOff=OFF;
         			}
				else
				{
					cnt_high=0;
					Rearview_OnOff=OFF;
					goto exit;
				}
         		}
			else
			{
				goto exit;
			}
         	}
		else
		{
			cnt_high=0;
			goto exit;
		}
         				
    	}

    }
 exit:
 EX0=1;
}

#endif