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An MCBSP interface circuit based on an FPGA

An interface circuit and port technology, applied in the field of embedded system design, can solve the problem of not having the MCBSP bus hardware interface, and achieve the effect of ensuring real-time, strong flexibility and scalability, and accelerating the development process.

Inactive Publication Date: 2019-04-23
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in airborne equipment, TI’s DSP chip is usually used for image and signal processing. MCBSP interface is used as the external communication interface of this type of DSP chip. DSP needs to send the image and signal processed data to PowerPC, FPGA and other applications for processing through MCBSP interface. However, PowerPC and FPGA do not have MCBSP bus hardware interface, so how to design a modular standard MCBSP interface circuit product, realize the rapid transplantation between different types of products, and improve the efficiency of product development is an urgent research topic for us

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  • An MCBSP interface circuit based on an FPGA

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] The FPGA-based MCBSP interface circuit of the present invention includes a serial-parallel conversion module, a receiving FIFO module, an interrupt processing module, a sending FIFO module, a parallel-serial conversion module and a local parallel bus management module.

[0019] The serial-to-parallel conversion module converts MCBSP serial input signals FSR, CLR and DR into parallel data RX_DIN, and writes them into the receiving FIFO module, wherein FSR is receiving synchronous frame, CLR is receiving synchronous clock, and DR is receiving serial Line data frame, RX_DIN is connected to the write port of the receiving FIFO module, and the serial-to-parallel conversion module is realized by Verilog or VHDL code.

[0020] The receiving FIFO module is used to buffer the received data. It is implemented through the IP provided by the logic chip manuf...

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Abstract

The invention provides an MCBSP interface circuit based on an FPGA. The serial-parallel conversion module writes the parallel data into the receiving FIFO module; a write-in port of the receiving FIFOmodule is connected with the serial-parallel conversion module; a reading port of the receiving FIFO module is connected with the local parallel bus management module; a data quantity port in the receiving FIFO module is connected with an interrupt processing module, the interrupt processing module is used for generating receiving overflow and receiving overtime interrupt signals, and the local parallel bus management module is responsible for address latch decoding and state register setting of a local parallel bus. According to the invention, the conversion function of the local parallel bus and the MCBSP bus is completed, and meanwhile, interrupt receiving is supported in order to ensure the real-time performance of data communication. Through design, simulation and verification, a modular product is formed, the flexibility and expansibility are higher, the rapid transplantation between different products can be achieved, and therefore the product development process is accelerated.

Description

technical field [0001] The invention relates to the technical field of embedded system design, in particular to an MCBSP interface circuit. Background technique [0002] MCBSP is a multi-channel buffered serial interface integrated on the digital signal processing chip DSP produced by TI, including a data channel and a control channel, connected to external devices through 7 pins. MCBSP expands the function on the basis of the standard serial interface. It has the same basic functions as the common serial dual-port, and supports special functions such as multi-channel sending and receiving. [0003] At present, in airborne equipment, TI’s DSP chip is usually used for image and signal processing. MCBSP interface is used as the external communication interface of this type of DSP chip. DSP needs to send the image and signal processed data to PowerPC, FPGA and other applications for processing through MCBSP interface. However, PowerPC and FPGA do not have MCBSP bus hardware in...

Claims

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Application Information

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IPC IPC(8): G06F13/38
CPCG06F13/385
Inventor 周明杰
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC