void iic_delay(void)
{
	unsigend char delaytime = 125;
	while(delaytime--);
}

void TCA8418_reset(void)
{
GPIO_ResetBits(GPIOC,GPIO_Pin_10);	//Pull down reset pin
iic_delay( );
iic_delay( );
iic_delay( );
iic_delay( );
GPIO_SetBits(GPIOC,GPIO_Pin_10);	//Pull up reset pin
}

sendbyteto_TCA8418(xxx,xx);//write to the xx data to the xxx register
readbytefrom_TCA8418(xxx);//read the xxx register value

void TCA8418_init(void)
{
TCA8418_reset()£»
iic_delay( );
iic_delay( );
iic_delay( );
iic_delay( ); 
sendbyteto_TCA8418(KP_GPIO1,0x0F);	//write 0x0F to the KP_GPIO1 register
iic_delay( );
sendbyteto_TCA8418(KP_GPIO2,0x1F);
iic_delay( );

sendbyteto_TCA8418(GPIO_DIR1,0x80);
iic_delay( );
sendbyteto_TCA8418(GPIO_DIR2,0x60);
iic_delay( );

sendbyteto_TCA8418(GPIO_INT_EN1,0x70);
iic_delay( );
sendbyteto_TCA8418(GPIO_INT_EN2,0x80);
iic_delay( );
sendbyteto_TCA8418(GPIO_INT_EN3,0x01);
iic_delay( );

sendbyteto_TCA8418(GPIO_DAT_OUT1,0x00);
iic_delay( );
sendbyteto_TCA8418(GPIO_DAT_OUT2,0x00);
iic_delay( );
sendbyteto_TCA8418(GPIO_DAT_OUT3,0x00);
iic_delay( );

sendbyteto_TCA8418(CFG,0x53);//CFG = 0x01
iic_delay( );

}

void hand_tca8418_event(void)
{
	unsigned char int_stat = 0x00;
	unsigned char key_lck_ec = 0x00;
	unsigned char key_event_a = 0x00;
	unsigned char temp = 0x00;
	unsigned char temp_cycle = 0x00;
	int_stat = readbytefrom_TCA8418(INT_STAT);	//read the INT_STAT register value
	if(0x01 == int_stat)
	{
		key_lck_ec =readbytefrom_TCA8418(KEY_LCK_EC);
		temp = key_lck_ec &0x0f;
		if(0x01 == temp)
		{
			key_event_a = readbytefrom_TCA8418(KEY_EVENT_A);
			MSG_DRV_SEND(MOD_KEY_ID,key_event_a);	//Send the key events and parameters to middleware
		}
		else
		{
			if(temp >10)
			temp = 10;
			for(temp_cycle = 0;temp_cycle <temp;temp_cycle++)
			{
				readbytefrom_TCA8418(KEY_EVENT_A);
			}
		}
	}
	else if(0x02 == int_stat)
	{
		temp = readbytefrom_TCA8418(GPIO_INT_STAT1);
		if(0x10 == temp)
		{
			temp = readbytefrom_TCA8418(GPIO_INT_LVL1);
			if(0x10 == temp)
			{
				MSG_DRV_SEND(MOD_KEY_ID,0x65);
				set_low_extio0_int( );



			}
			else
			{

				MSG_DRV_SEND(MOD_KEY_ID,0x65|0x80);
				set_high_extio0_int();

			}







		}
		readbytefrom_TCA8418(GPIO_DAT_STAT1);
		readbytefrom_TCA8418(GPIO_DAT_STAT1);

		readbytefrom_TCA8418(GPIO_DAT_STAT2);
		readbytefrom_TCA8418(GPIO_DAT_STAT2);

		readbytefrom_TCA8418(GPIO_DAT_STAT3);
		readbytefrom_TCA8418(GPIO_DAT_STAT3);






	}
	else
	{



	}
	sendbyteto_TCA8418(INT_STAT,0x1F);

}

unsigned char ext_status = 0x00;

void set_high_extio0_int(void)
{
ext_status |= 0x10;
sendbyteto_TCA8418(GPIO_INT_LVL1,ext_status);




}


void set_low_extio0_int(void)
{
ext_status &= 0xef;
sendbyteto_TCA8418(GPIO_INT_LVL1,ext_status);




}