新建一个工程,将程序改成如下
#include
#define uint8 unsigned char
#define uint16 unsigned int
uint8 key_data(void)//读取按键是否被按下
{
uint8 key_value=0;
if((P1IN&BIT1) == 0)
{
__delay_cycles(10000);//延时防抖动
if((P1IN&BIT1) == 0)
{
key_value=1;
while((P1IN&BIT1) == 0);
}
}
return key_value;
}
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop WDT
// Configure GPIO
P1DIR |= BIT0; // Clear P1.0 output latch for a defined power-on state
P1DIR &= ~BIT1; //配置BIT1为输入
P1OUT|=BIT1; //配置 BIT1为1
P1REN |= BIT1; //配置BIT1上拉
/*当GPIO作为输入时,PxREN和PxOUT一起配合设置内部的上/下拉电阻,
*PxREN置1时使能上/下拉电阻,PxOUT置1时上拉,置0时下拉*******/
PM5CTL0 &= ~LOCKLPM5; // Disable the GPIO power-on default high-impedance mode
// to activate previously configured port settings
while(1)
{
uint8 key_value=0;
key_value=key_data();
if(key_value==1)
{
key_value=0;
P1OUT ^= BIT0;
}
}
}
编译,运行,即可通过S1(P1.1)控制LED2(P1.0)了
本文参考:https://e2echina.ti.com/group/universityprogram/students/f/11/p/149721/424157#424157