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The function CyU3PDebugPrint() accepts a zero-terminated string as the 2nd argument. So, a zero character cannot be sent with this function.
There is a function CyU3PUartTransmitBytes() to send a data block in any length.
Please refer the "API Reference Guide" document form more details.
if i use CDC virtual uart the configuration is same ?
I rewrite the CyU3PDebugPrint funtion ,remove the MyDebugSNPrint function, solve the problem.