lse灯和蜂鸣器的控制

系统统上电后7个LED处于熄灭状态，D8对应的LED处于熄灭状态； 当k1按下并松开后7个LED全亮，当k2按下并松开后7个LED全熄灭，当k3按下并松开后点亮D8对应的LED，当k4按下并松开后关闭D8。不会写程序

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main()
{
// 初始化7个LED处于熄灭状态，D8对应的LED处于熄灭状态
int leds = 0;

while (1)
{
// 模拟k1按下并松开
if (/* k1 is pressed and released */)
{
// 点亮7个LED
leds = 0x7F;
}

Copy code
// 模拟k2按下并松开
if (/* k2 is pressed and released */)
{
  // 熄灭7个LED
  leds = 0x00;
}

// 模拟k3按下并松开
if (/* k3 is pressed and released */)
{
  // 点亮D8对应的LED
  leds |= (1 << 8);
}

// 模拟k4按下并松开
if (/* k4 is pressed and released */)
{
  // 熄灭D8对应的LED
  leds &= ~(1 << 8);
}
}

return 0;
}