你好,我用是vitalsigns的1642demo代码,然后看到mss_main.c里面的MmwDemo_mboxReadTask函数,
我用了UART_writePolling输出字符,请问我怎么看这个字符是否成功输出了?

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你好,我用是vitalsigns的1642demo代码,然后看到mss_main.c里面的MmwDemo_mboxReadTask函数,
我用了UART_writePolling输出字符,请问我怎么看这个字符是否成功输出了?
