利用ucos实现了NRF24L01的接收，并且加入了超生测距的功能，测距的稳定性良好-Use ucos realized NRF24L01 reception, and joined the bounce ranging capabilities ranging stability is good! !

stm32f4 ucos ，包含了按键扫描和防抖的处理，按键可以实现长按短按，短按弹起，长按弹起-stm32f4 ucos, it contains a key-scan and image stabilization process, the key can achieve long press short press, short press bounce, bounce press