[M031] Use SPI Driver SI4463

[chhsieh3]

• Application: This example code uses M031 SPI to drive SI4463 to achieve wireless sending and receiving data.
• BSP Version: M031 BSP CMSIS V3.03.000
• Hardware: NuMaker-M031SD V1.1

This example code uses M031 to drive SI4463 through SPI interface to achieve wireless (433M) sending and receiving data.

You can download the sample code at https://www.nuvoton.com/resource-downlo ... 0818172422