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请加个函数 #10284

@htl5241

Description

@htl5241

Describe problem solved by the proposed feature

因为驱动里经常要调用超时判断功能 , linux 和 uboot 都有相似函数。
还有请加bitops , linux 和 uboot 都有 ,经常用的。

Describe your preferred solution

rt_tick_t rt_delta_tick_get(rt_tick_t last_time)
{
rt_tick_t tnow = rt_tick_get();
if (tnow >= last_time) {
return (tnow - last_time);
} else {
return (RT_TICK_MAX - last_time + tnow + 1);
}
}

bitops 可以从linux 或 uboot 移植过来

Describe possible alternatives

No response

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