DSP second-level Bootloader developing based on Flash header file burning of TMS320DM642

ZHANG Yu1, ZHANG Qin-jian1, SHEN Hai-kuo1, LIU Wei2, WU Ru-xuan2

(1.School of Mechanical Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;

2.Beijing Institute of Aerospace System Engineering, Beijing 100076, China)

Abstract: Aiming at the problems of the data and programs in the memory of DM642 always get lost completely once the power is down so DSP system can′t work without a computer, one method to load programs automatically from exterior Flash storage by using Boot mechanism of DSP was presented. The theory of header file program ming by Flash was introduced in detail. A burning method of Flash header file for Am29LV033C Flash chip was achieved. The method of twice loading of programs was explained and the process of Flash programming was presented. The way of using CCS to save data so as to generate header files was described. The guiding process of DSP and developing process of the second-level bootloader is briefly introduced here. A second-level Bootloader program specific to the project was designed. A simple testing program was developed to validate the Flash burning method and second-level Bootloader guiding program in the end. The research results indicate that the programming method for Flash header file is very suitable for the beginners for it is easily understood. The method also has excellent adaptability in that only a small part of instructions needs to be modified to fit the operations of different types of Flash chips, as a result the developing of second-level Bootloader becomes easier.