#define SET_BIT_HIGH(x, n) (x | ((1U)<<(n-1)))
#define SET_BIT_LOW(x, n) (x & ~((1U)<<(n-1)))
#define SET_BIT_TOGGLE(x, n) (x ^((1U)<<(n-1))) //位取反
U----unsigned 类型,可避免后面修改数字带来的错误
#define SET_BIT_HIGH(x, n) (x | ((1U)<<(n-1)))
#define SET_BIT_LOW(x, n) (x & ~((1U)<<(n-1)))
#define SET_BIT_TOGGLE(x, n) (x ^((1U)<<(n-1))) //位取反
U----unsigned 类型,可避免后面修改数字带来的错误