Method of storage unit access in digital signal processing system and processing system therefor

A digital signal processing and storage unit technology, applied in the direction of memory address/allocation/relocation, etc.

Active Publication Date: 2007-11-28
DATANG MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for accessing storage units in a digital signal processing system and its digital signal processing system, so as to solve the need to complete lower-grained access to storage units in the prior art, but the instruction set does not support such access How to complete the access to the storage unit without affecting the technical problem of DSP resource waste

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  • Method of storage unit access in digital signal processing system and processing system therefor
  • Method of storage unit access in digital signal processing system and processing system therefor
  • Method of storage unit access in digital signal processing system and processing system therefor

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Embodiment

[0062] The invention can be used for exchanging with external data, and can conveniently complete the unpacking operation. In applications such as image processing, the data is often 8 bits and tightly arranged in the data memory outside the DSP. When the data is transferred into the internal RAM of DSP, 16 bits must be used to write to ensure the correctness of the data. At this time, the 8-bit read method is adopted, and the unpacking of the data can be completed only by a simple load instruction, that is, the upper 8 bits and lower 8 bits are respectively read into different general-purpose registers, as shown in Figure 6. 16-bit read / 8-bit write

[0063] Similar to 8-bit read / 16-bit write, this mode is used to exchange data with the external memory of DSP, and can complete the grouping operation conveniently, as shown in Figure 7. DSP reads the data from the storage unit in 16-bit mode and writes in 8-bit mode.

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Abstract

The invention relates to a method and processing system of the visiting storage unit on digital signal processing system which is used to finish the storage unit with unit address data N1 bit to visit the storage unit with unit address data M2 bit. The method comprises: (1) establishing the projection relation between the storage unit and the logic space a1:arranging Q areas on the logic space, Q = N1 / N2; a2: establishing the relation between each address unit of the storage unit and each area of the step a1; a3: establishing the relation between the storage unit and the Q areas: the [N2X(X-1), N2XX-1] bit of each address unit of the storage unit exists the relation with the X area corresponding address unit of the logic space; (2) when doing N2 bit visiting, first quoting the visiting address area, then reading data / writing data from the address unit [N2X(X-1), N2XX-1] of the storage unit.

Description

technical field [0001] The invention relates to a method for accessing storage units in a digital signal processing system (DSP) and a digital signal processing system thereof, in particular to a method for 16-bit DSP supporting 8-bit access addressing and a digital signal processing system thereof. Background technique [0002] DSP system, also known as digital signal processor (DSP chip), it is a kind of microprocessor with special structure. The interior of the DSP chip adopts the Harvard structure that separates the program and data, has a special hardware multiplier, widely uses pipeline operations, and provides special DSP instructions, which can be used to quickly implement various digital signal processing algorithms. Since the birth of DSP chips in the early 1980s, DSP chips have developed rapidly in more than 20 years. The performance-price ratio of DSP chips has been continuously improved, and the development methods have become more and more perfect. DSP chips h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02
Inventor 李峰
Owner DATANG MICROELECTRONICS TECH CO LTD
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