Introduction - If you have any usage issues, please Google them yourself
STM32F103RBT6 Virtual SPI communication test.
This code I only tested the host sent to the slave. From the machine after receiving the serial print to return.
Other functions do not have a test (including the host receiving and receive).
This code you can use to learn and exchange. Commercial! The application of this procedure to the accident is borne by you.!
I am not responsible for maintaining and supporting this code!