TLV320AIC3107: 耳机喇叭检测问题

TI的工程师，你们好，我们现在正在开发此芯片的耳机喇叭切换功能，通过读取耳机检测寄存器的值来打开或者关闭喇叭，但是有一个奇怪的问题是这颗芯片在上电的一段时间内不论是都带着耳机，如果不做拔插耳机的动作，该耳机寄存器内的值永远认为是有耳机存在的。这与我们使用逻辑出现相悖之处，希望贵司给予帮助，谢谢

void tlv320set()
{
//	am_gpio_pin_cfg(PIO0_27,AM_GPIO_OUTPUT_INIT_LOW);
//	MyDelayMS(300);
//	am_gpio_set(PIO0_27,AM_GPIO_LEVEL_HIGH);
	
			uint8_t a = 0x80;
			am_i2c_write(&__i2c_tlv320,1,&a,1);//Èí¼þ¸´Î»

			GDelay(2000);
			a = 0x32;
			am_i2c_write(&__i2c_tlv320,102,&a,1);//CLKDIVIN use MCLK
			am_i2c_read(&__i2c_tlv320,102,&a,1);
			a = 0x18;
			am_i2c_write(&__i2c_tlv320,3,&a,1);//PLL disable and select Q value
			am_i2c_read(&__i2c_tlv320,3,&a,1);
			a = 1;
			am_i2c_write(&__i2c_tlv320,101,&a,1); //CLKIN use CLKDIV_OUT
			am_i2c_read(&__i2c_tlv320,101,&a,1);
			a = 0xa;
			am_i2c_write(&__i2c_tlv320,7,&a,1); //FSref = 48KHz
			am_i2c_read(&__i2c_tlv320,7,&a,1);
			a = 0x00;
			am_i2c_write(&__i2c_tlv320,2,&a,1); //sample
			am_i2c_read(&__i2c_tlv320,2,&a,1);
			a = 0x00;
			am_i2c_write(&__i2c_tlv320,8,&a,1); //SLAVE mode   ?
			am_i2c_read(&__i2c_tlv320,8,&a,1);

			a = 0x20;
			am_i2c_write(&__i2c_tlv320,9,&a,1); // i2s mode 24bit  ?
			am_i2c_read(&__i2c_tlv320,9,&a,1);
			a = 0x0f;
			am_i2c_write(&__i2c_tlv320,12,&a,1); //audio codec diital filter control register
			am_i2c_read(&__i2c_tlv320,12,&a,1);
			a = 0x80;
			am_i2c_write(&__i2c_tlv320,13,&a,1); 
		  a = 0xd8;
			am_i2c_write(&__i2c_tlv320,14,&a,1);//Headset Configuration Register  OUT AC-COUPLED //¶ú»ú²åÈë¼ì²â
			a = 0xc0;
			am_i2c_write(&__i2c_tlv320,25,&a,1);
			am_i2c_read(&__i2c_tlv320,25,&a,1);  //0xc2

			a = 0xc0;
			am_i2c_write(&__i2c_tlv320,37,&a,1); //left and right DAC power on
			am_i2c_read(&__i2c_tlv320,37,&a,1);
					a = 0x6;	
		am_i2c_write(&__i2c_tlv320,38,&a,1);
		
			
			a = 0x01;
			am_i2c_write(&__i2c_tlv320,41,&a,1); ///*out path select*/     
			am_i2c_read(&__i2c_tlv320,41,&a,1);
			a = 0x78;
			am_i2c_write(&__i2c_tlv320,42,&a,1);//*out path select DTS2014123002762 change delay time from 2s to 200ms*
			am_i2c_read(&__i2c_tlv320,42,&a,1);
			a = 0x0;
			am_i2c_write(&__i2c_tlv320,43,&a,1);	/*left DAC not muted*/
			am_i2c_read(&__i2c_tlv320,43,&a,1);
			a = 0x0;
			am_i2c_write(&__i2c_tlv320,44,&a,1);	/*right DAC not muted*/	
			am_i2c_read(&__i2c_tlv320,44,&a,1);
			a = 0x80;
			am_i2c_write(&__i2c_tlv320,47,&a,1);	//DAC_L1 to HPLOUT Volume Control Register
			am_i2c_read(&__i2c_tlv320,47,&a,1);
	    a = 0xd;
			am_i2c_write(&__i2c_tlv320,51,&a,1);
			am_i2c_read(&__i2c_tlv320,51,&a,1);//0x0c

			a = 0x80;
			am_i2c_write(&__i2c_tlv320,64,&a,1);//DAC_R1 to HPROUT Volume Control Register
			am_i2c_read(&__i2c_tlv320,64,&a,1);
			a = 0xd;
			am_i2c_write(&__i2c_tlv320,65,&a,1);
			am_i2c_read(&__i2c_tlv320,65,&a,1);//0x0c
}
uint8_t headdetect = 0;
void headsetdetect()
{
  uint8_t a = 0,b = 0;
	am_i2c_read(&__i2c_tlv320,14,&a,1);	
 if (( a == 0xC8) && (headdetect != 2)) //À®°È¾²Òô
	{
		a = 0x91;
 		am_i2c_write(&__i2c_tlv320,86,&a,1);
		headdetect = 2;
	}
 else if ((a == 0xD8) && (headdetect != 3)) //¿ªÆôÀ®°È
	{
		a = 0x80;
		am_i2c_write(&__i2c_tlv320,82,&a,1);		
		a = 0x99;
		am_i2c_write(&__i2c_tlv320,86,&a,1);				
		a = 0x0c;
		am_i2c_write(&__i2c_tlv320,73,&a,1);
		headdetect = 3;
	}
//	if ( a == 0xD8 ) //
//	{
//		am_i2c_read(&__i2c_tlv320,14,&a,1);
//		if ( a == 0xC8 )
//		{			
//		a = 0x80;
//		am_i2c_write(&__i2c_tlv320,82,&a,1);		
//		a = 0x99;
//		am_i2c_write(&__i2c_tlv320,86,&a,1);				
//		a = 0x0c;
//		am_i2c_write(&__i2c_tlv320,73,&a,1);
//		}
//	}
//		else if ( a == 0xc8 ) //À®°È¾²Òô
//	{
//		am_i2c_read(&__i2c_tlv320,14,&a,1);
//		if ( a == 0xd8 )
//		{
//		a = 0x91;
// 		am_i2c_write(&__i2c_tlv320,86,&a,1);
//		}
//	}
}