請先看『使用說明』

From LEXWiKi

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How to use M954B/M954C driver

1.First jump mode

you need to know which mode do you want and check device jump to the correct mode

2.Second confirm and edit transmittal mode

After your confirm your transmittal mode

Edit ax99100_sp.c code to your requirement(default is RS232)

For example if you want to test RS485 half duplex so you need to change the code uart mode

//Port1/Port2/Port3/Port4
.uart_mode= AX99100_RS485_HALF_DUPLEX,

You have 4 ports ,so you need to change code port1-port4 uart mode

3.Compiler edit code