STM32--硬件I2C主从机通讯，采用DMA方式进行通讯，SP1为从机，SPI2为主机-The STM32- hardware I2C master slave communication using DMA mode

利用NRF24L01+无线模块，使两块STM32开发板实现无线传输数据。主机首先向从机发送数字，从机接收到后，把该数字打印到终端，并对该数字+1。然后从机把+1后的数字发送给主机，主机收到后再把该数字发送到从机，如此循环。-Use NRF24L01+ wireless module so that two STM32 development board for wireless transmission of data. First, the host sends to the digital,

基于STM32的双机全双工SPI主从通信程序，包括主机程序和从机程序。(STM32 dual full duplex SPI master-slave communication based program, including the host program and the program from the machine.)