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Interface device between digital signal processor and standard computer keyboard

A digital signal and interface device technology, applied in the field of electronics, to achieve the effect of simple hardware interface, easy software, and large selection of keyboards

Inactive Publication Date: 2006-02-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0003] At present, the more common DSP device command input methods are only some relatively simple joysticks, simple buttons, mouse, etc., which can meet the requirements for simple DSP applications, but for more complex digital image processing and tracking applications, The operating parameters of DSP equipment often require real-time control by the operator. At this time, a simple input device is far from meeting the requirements.

Method used

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  • Interface device between digital signal processor and standard computer keyboard
  • Interface device between digital signal processor and standard computer keyboard
  • Interface device between digital signal processor and standard computer keyboard

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Embodiment Construction

[0018] The present invention includes a digital signal processor 1, an inverter 2, resistors 3, 4, and triodes 5, 6. Such as figure 1 As shown, the model of digital signal processor 1 is TMS320C6203B, the model of inverter 2 is 74HC04, the resistance value of resistors 3 and 4 is 10K ~ 20K, and the switching transistor of model 9013 is used for transistors 5 and 6. The data ports P1, P2, P3, and P4 in the digital signal processor 1 are arranged according to the specific port usage of the DSP device.

[0019] The serial protocol for communication between the keyboard and the host of the DSP device is completed in the form of frames. A frame contains 11 to 12 bits. The host sends 12 bits to the keyboard, and the keyboard sends 11 bits to the host. Each frame contains one byte of data. , the meaning of these bits is as follows:

[0020] A start bit, which is always 0;

[0021] Eight data bits, low order first;

[0022] A parity bit, odd parity;

[0023] A stop bit, always 1...

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Abstract

An interface for digital signal processor to standard computer keyboard is prepared as connecting four data ports of said processor separately to phase inverter and base electrode of two triodes, connecting phase inverter to two resistances and collecting electrode of two triodes as another end of resistance to power pin of keyboard connector, connecting the collecting electrode of two triodes separately to data and clock pins of keyboard connector and connecting emission electrode of two triodes to power earthing pin of keyboard connector.

Description

technical field [0001] The invention belongs to the technical field of electronics and relates to a communication interface technology, in particular to an interface device between a digital signal processor and a standard computer keyboard. technical background [0002] At present, in the fields of signal processing and digital image processing, digital signal processors (DSP) are used more and more, and the complexity of tasks is also increasing, which requires a good relationship between the operator and the DSP equipment. In the interactive interface, the operator should be able to input relatively rich control and debugging instructions to the DSP equipment. [0003] At present, the more common DSP device command input methods are only some relatively simple joysticks, simple buttons, mouse, etc., which can meet the requirements for simple DSP applications, but for more complex digital image processing and tracking applications, The operating parameters of DSP equipmen...

Claims

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Application Information

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IPC IPC(8): G06F3/02
Inventor 韩广良张云峰
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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