单片机IO口模拟SPI程序,程序简单好用，适合初学SPI的学员-Single-chip IO simulation SPI program, the program is simple and easy to use, suitable for beginners SPI trainees

IO模拟SPI这个是基于nrf24l01的spi例程，适合初学者-IO simulation SPI nrf24l01 this is based on the spi routines, suitable for beginners

本程序展示了Linux平台下GPIO驱动实现技术。本程序可以方便实现IO口控制。-This program shows the Linux platform SPI driver implementation technology. This procedure can be easily achieved IO port control.

STM32F446 包括IO操作,SPI操作，内部定时器,ADC的DMA方式，DAC的DMA方式，UART的DMA方式,CAN的通用方式。适合STM32F4xx系统(STM32F446 includes IO operation, SPI operation, internal timer, DMA mode of ADC, DMA mode of DAC, DMA mode of UART, common mode of CAN. Suitable for STM32F4xx system)