关键词: 无人机, 现场可编程门阵列, 数字信号处理器, 串行外设接口启动, 快速启动

Abstract: In order to make the terminal drone control program easy to update, based on the inherent architecture, a wireless update method for drone control program is proposed, and the system scheme principle, planning, and design are described. Leveraging the characteristic that the main control MCU has direct or indirect communication links with the control computer, various sub-control DSPs, and FPGAs, a program re-update scheme is proposed and designed on the DSP side. This involves initiating Mode A via the Serial Peripheral Interface, enabling the main control MCU to simulate the function of an external FLASH for the DSP, and injecting the Bootloader into the DSP's internal RAM for execution. The Bootloader is designed with a re-update function. On the FPGA side, the main control MCU takes over control of the FPGA-side FLASH, and by adopting the QuickBoot principle, an auxiliary update scheme for the control program is proposed and designed. This allows the main control MCU to simulate the FPGA's own FLASH control for update operations. After practical testing, it has been confirmed that this solution can break free from the constraints of traditional update methods and specialized JTAG tools. It enables precise updates of control programs for various sub-control units via wireless data transmission, targeting specific device IDs. This approach is not only convenient and efficient but also reduces time overhead by approximately 20%, offering significant reference value for similar engineering architectures.

Key words: unmanned aerial vehicle, FPGA, DSP, SPI-A boot, QuickBoot