imx6ull用C语言实现按键点灯代码

int main(void)
{
	volatile unsigned int *pRegLed;	
									

	volatile unsigned int *pRegKey2;
									
	
	

	
	pRegKey2 = (volatile unsigned int *)(0x020C4074);
	*pRegKey2 |= (3<<12);
									
		
	pRegLed = (volatile unsigned int *)(0x02290000 + 0x14);
	*pRegLed |= (0x5);		 

		
	pRegKey2 = (volatile unsigned int *)(0x020E01B0);
	*pRegKey2 &= ~(0xf);	
	*pRegKey2 |= (0x5);		
	
	
	pRegLed = (volatile unsigned int *)(0x020AC004);
	*pRegLed |= (1<<3);

	
	pRegKey2 = (volatile unsigned int *)(0x020A8004);
	*pRegKey2 &= ~(1<<14);

	pRegLed = (volatile unsigned int *)(0x020AC000);
	pRegKey2 = (volatile unsigned int *)(0x020A8000);
	
	while(1)
	{
		if((*pRegKey2 & (1 << 14)) == 0)	
		{
			
			*pRegLed &= ~(1<<3);
		}
		else
		{
			
			*pRegLed |= (1<<3);
		}
	}
}