tmsfxx dsp中flash的应用研究（Research on the application of flash in tmsfxx DSP）.docVIP

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tmsfxx dsp中flash的应用研究（Research on the application of flash in tmsfxx DSP）.doc

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tmsfxx dsp中flash的应用研究（Research on the application of flash in tmsfxx DSP）.doc

tms320f28xx dsp中flash的应用研究（Research on the application of flash in tms320f28xx DSP） Application of Flash TMS320F28xx in DSP 2008-07-05 internal 22:22:54| classification: professional knowledge | Tags: | font in Small subscription 1 Preface TMS320F28xx DSP in the 128 K * 16 bit word Flash and two pieces of 4 K x16bit word single cycle access RAM (SARAM) LO single cycle access and L1, a 8 Kxl6 bit word RAM (SARAM) single cycle access HO and two pieces of 1 Kxl6 bit word RAM (SARAM) and M0 M1. Because of the variety of memory and large capacity, it is necessary to configure each memory from the system height, which is usually related to the on-chip Flash. In addition, TMS320F28xx DSP chip watchdog timer module (WDT), ROM (ROM bootloader) module, code security module (CSM), to make reasonable use of these modules for the entire system service, also must use Flash must. From this we can see that the position and function of Flash are quite obvious, so this paper studies several usages of Flash. 2 from the Flash copy section to the RAM 2.1 copy interrupt vector In TMS320F28xx devices, the peripheral extended interrupt (PIE) module manages interrupt requests. On power up, all interrupt vectors must be located in non-volatile memory (such as Flash), but copy the interrupt vector into the PIEVECT RAM, which is part of the device initialization program in the user code. PIEVECT RAM is a specific RAM block, which is a 256 * 16 block in the current TMS320F28xx device. The starting address in the data space is Ox000D00. Connect the interrupt vector to the Flash, and then copy the interrupt vector to the PIEVECT RAM at run time. There are many ways to implement it. One way is to create a constant C structure that contains function pointers, which consist of 128 32-bit vectors. If you use the structure of DSP281x or DSP280x peripherals, this structure is called PieVectTableInit, which has been created in DSP281x_PieVect.c or DSP280x_PieVect.c (see the routines provided by TI). Bec