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我想在串口接收前先清缓存再接收，如何清除串口接收缓存
#define UARTCC26XX_FIFO_SIZE 32 //Size of the TX and RX FIFOs is 32 items
user4090300 说：没有新的数据来的话，是不是cpu串口接收到的数据就一直在fifo里面
是的
