基于STM32F4的ucosII移植程序，包含在ucosII下的DMA USART串口发送程序，无CPU干预，直接通过DMA向上位机发送数据！-Based STM32F4 of ucosII transplant procedures contained in ucosII the DMA USART serial transmission program, without CPU intervention, directly by the DMA to send data up crew!