Two-stage BootLoader serial loading self-starting method based on TMS320C674X processor

Abstract

The invention relates to a two-stage BootLoader serial loading self-starting method based on a TMS320C674X processor. The strapdown inertial navigation system does not need to be disassembled; updating through serial communication is considered; advantages of a software program are maintained; the influence of accidental interruption on the system in the burning process can be tolerated; meanwhile, after FLASH burning is completed, a UBL (Unstructured Broadcast Loader) two-stage BootLoader mode is adopted. The application program codes are carried to the SDRAM through the serial burning program instead of the chip, and the SDRAM is directly driven to operate, so that the process of powering on the system again can be omitted, and certain flexibility and practicability are achieved in the actual using process.

Description

Technical field [0001] The invention belongs to the technical field of embedded basic software platforms, and relates to a strapdown inertial navigation system, in particular to a self-starting method of a secondary BootLoader serial loading based on a TMS320C674X processor. Background technique [0002] TI's TMS320C674X series of high-performance floating-point DSP (Digital Signal Processing) processors have the advantages of low power consumption, rich interfaces, and strong floating-point computing capabilities. As a system CPU, they have been widely used in strapdown inertial navigation systems. In engineering practice, the application of TMS320C674X series processors will inevitably involve chip booting. The currently commonly used TMS320C674X processor booting methods mainly include emulator JTAG interface + FLASH loading mode and serial interface + FLASH loading mode. The emulator JTAG interface + FLASH loading mode means that the application emulator is connected to the J...

AI Technical Summary

Problems solved by technology

For the emulator JTAG interface + FLASH loading method, since the DSP chip is integrated in the system circuit, the strapdown inertial navigation system needs to be disassembled every time the software program is updated, and then the software program is updated by connecting the chip JTAG interface through the emulator. In a relatively complex navigation system, disassembling or disassembling the SINS is a rather complicated process involving many aspects, so the method of loading the program through the emulator JTAG interface + FLASH obviously has many inconveniences in actual use; For the serial interface + FLASH loading method, after the serial programming program is programmed into the FLASH through the JTAG interface for the first time, subsequent update applications can update the software through the serial interface, and the SINS can no longer be disassembled. Compared with the emulator JTAG interface + FLASH loading method, the operability is significantly improved, but the serial interface + FLASH loading method also has the problem that the operation cannot be interrupted during the serial programming process, such as the system is not allowed to power off during programming, and cannot tolerate programming. Errors and other shortcomings, if the programming fails, you need to re-disassemble the system to connect to the JTAG interface of the emulator to update the serial programming program. At the same time, after the programming is successful, the system needs to be re-powered or reset, and the new application can be loaded before it can run normally. This method loses flexibility in some applications

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