A Direct Memory Access Controller with Computing Capabilities

Abstract

The invention relates to the field of data searching, in particular to a direct storage access controller. The direct storage access controller comprises a data bus, an address bus and a hardware computing unit, wherein the hardware computing unit is connected with the data bus and the address bus respectively. Through adoption of the direct storage access controller, data passing through the direct storage access controller can be subjected to operation processing, so that the direct storage access controller has an operation function, and the application range is widened.

Description

technical field [0001] The invention relates to the field of data search, in particular to a direct memory access controller. Background technique [0002] The DMA (Direct Memory Access) controller is a peripheral used for data exchange between internal memories, between internal and external memories, and between various standard peripherals and memories. A simple DMA controller structure such as figure 1 Shown, including an address bus, a data bus, counters, the first register and interrupt modules. The counter is used to store the address calculated for exchanging data. The first register is used to temporarily store the data transmitted each time, and the interrupt module is used to apply for bus control right to the CPU or MCU or return an interrupt report. When the DMA controller exchanges data through the address bus and data bus, it does not need to go through the central processing unit or microcontroller, so it saves the CPU or MCU to fetch instructions, fetch d...

AI Technical Summary

Problems solved by technology

[0003] However, traditional DMA controllers often do not have the ability of CPU or MCU arithmetic operations and relational operations

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