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cc2540串口问题



我在用BLE-CC254x-1.4.0,调试串口时碰到问题:

1、打开串口:NPI_InitTransport(NULL); NULL对吗? 若不对,应该是什么参数?

2、调用NPI_WriteTransport发送数据,有时可以,有时不行,什么原因?

急,请各位高手赐教