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Method for asynchronous-serial data transfer over a synchronous-serial interface

A technology of asynchronous serial and asynchronous data, applied in the direction of digital transmission system, transmission system, electrical digital data processing, etc.

Inactive Publication Date: 2013-05-22
VEGA GRIESHABER GMBH & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of software solutions with "bit-banging" are the additional program storage requirements, the additional required processor computing power and additional sources of software errors in the case of increased reliability requirements

Method used

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  • Method for asynchronous-serial data transfer over a synchronous-serial interface
  • Method for asynchronous-serial data transfer over a synchronous-serial interface
  • Method for asynchronous-serial data transfer over a synchronous-serial interface

Examples

Experimental program
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Embodiment Construction

[0025] The data transmitter 10 is designed as a microcomputer and has an SPI interface 11 as a serial interface, which is connected in master mode via a data line 12 to another microcomputer as data receiver 20 for data transmission according to the UART standard. The microcomputer 20 has a UART interface 21 with a data input 22 as an interface.

[0026] In the simplest case, the SPI interface 11 comprises at least one shift register 11a as a transmit register and has a data output MOSI (also referred to as SDO) connected to a data line 12 , where a second data line is not shown, usually provided The data input terminal MISO. Furthermore, two control lines 13 and 14 of the SPI interface 11 are shown, which correspond to the clock line CLK and the slave select (SS)—also referred to as chip select (CS). The two control lines 13 and 14 are not connected to the UART interface 21 of the data receiving device 20 .

[0027] The SPI interface 11 allows a synchronous serial data tran...

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PUM

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Abstract

The invention relates to a method used for performing one-way asynchronous serial data transmission between a transmission interface (11) of a data transmission apparatus (10) and a data receiving device (20) with a serial receive interface (21) having an asynchronous serial data input terminal in an asynchronous data format with F (F belongs to N) framing bits. According to the invention, the transmission interface (11) is configured into a synchronous serial interface (11) with at least one data line (12), wherein the data line is connected to the asynchronous serial data input terminal (22) of the receive interface (21), and is used for adding F framing bits for data word with D (D belongs to N) data bits conveyed by the data transmission apparatus (10) in order to generate a format corresponding to asynchronous data format, and storing the data word with frame bits in a transmitting register (11a) for transmission to a data receiving device (20).

Description

technical field [0001] The invention relates to a method for unidirectional asynchronous serial data transmission according to the preamble of claim 1 . Background technique [0002] Communication or data transmission between microcomputers or between a microcomputer and a peripheral device is performed either in parallel or serially, and in the case of parallel, data is received and transmitted in parallel per data unit, respectively. [0003] In the case of serial data transmission, there is a difference between the synchronous serial method and the asynchronous serial method in which the time course or time control for synchronization between the sending side and the receiving side is achieved by means of The clock signal provided by the sending side is implemented, in the asynchronous serial method the data transmission takes place without a clock signal. [0004] Serial data transmission—for example according to the SPI (Serial Peripheral Interface) protocol—takes plac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/40H04L1/00
CPCG06F13/4282
Inventor M·科普
Owner VEGA GRIESHABER GMBH & CO
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