CN204423364U - A kind of single chip computer device expanding RS485 communication interface - Google Patents
A kind of single chip computer device expanding RS485 communication interface Download PDFInfo
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- CN204423364U CN204423364U CN201520113291.5U CN201520113291U CN204423364U CN 204423364 U CN204423364 U CN 204423364U CN 201520113291 U CN201520113291 U CN 201520113291U CN 204423364 U CN204423364 U CN 204423364U
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Abstract
The utility model discloses a kind of single chip computer device expanding RS485 communication interface, comprise main processing block, main processing block is connected with expansion RS485 auxiliary processing module by module select signal line, SPI interface signal line, expansion RS485 auxiliary processing module comprises auxiliary process single-chip microcomputer, auxiliary process single-chip microcomputer is connected with RS485 chip by UART interface, I/O control interface, and RS485 chip is provided with RS485 interface.Achieve single-chip microcomputer by the multiple RS485 communication interface of SPI Interface Expanding, single-chip microcomputer can be made to have the communication interface of multiple external connection, meet the demand of people.
Description
Technical field
The utility model belongs to singlechip technology field, is specifically related to a kind of single chip computer device expanding RS485 communication interface.
Background technology
Current single-chip microcomputer only has one or limited several asynchronous serial communications (UART) interface, but when the communication interface quantity that Single Chip Microcomputer (SCM) system needs exceeds the asynchronous serial communication interface quantity that this single-chip microcomputer can provide, just need the communication interface that single-chip microcomputer extension is new, RS485 communication interface is a kind of communication interface commonly used, when a single-chip microcomputer needs to use multiple RS485 interface, just need the multiple RS485 communication interface of single-chip microcomputer extension, meet actual demand.
Utility model content
The purpose of this utility model is to provide a kind of single chip computer device expanding RS485 communication interface, and achieving single-chip microcomputer can by the multiple RS485 communication interface of SPI Interface Expanding.
The technical scheme that the utility model adopts is, a kind of single chip computer device expanding RS485 communication interface, comprise main processing block, main processing block is connected with expansion RS485 auxiliary processing module by module select signal line, SPI interface signal line, expansion RS485 auxiliary processing module comprises auxiliary process single-chip microcomputer, auxiliary process single-chip microcomputer is connected with RS485 chip by UART interface, I/O control interface, and RS485 chip is provided with RS485 interface.
Feature of the present utility model is also,
Wherein main processing block is connected with auxiliary process single-chip microcomputer, and main processing single chip is MSP430F149 single-chip microcomputer.
Wherein expanding RS485 auxiliary processing module is MSP430F2132 single-chip microcomputer.
Wherein RS485 chip is MAX3485 chip.
Wherein SPI interface signal line connects UCB0STE interface, UCB0SIMO interface, UCB0SOMI interface and the UCB0CLK interface of expanding RS485 auxiliary processing module.
Wherein UART interface comprises UCA0TXD interface and UCA0RXD interface.
The beneficial effects of the utility model are that auxiliary process single-chip microcomputer passes through UART interface, I/O control interface is connected with RS485 chip, the i.e. auxiliary process single-chip microcomputer extension RS485 interface of RS485 chip, main processing block is by module select signal line options expansion RS485 auxiliary processing module, and auxiliary process single-chip microcomputer can carry out exchanges data with main processing block by SPI interface signal line, main processing block can obtain the information of RS485 interface, therefore, main processing block is by SPI interface and easily extensible RS485 interface, thus main processing block can expand the RS485 interface of multiple quantity.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation expanding the single chip computer device of RS485 communication interface of the utility model;
Fig. 2 is the connection diagram expanding RS485 auxiliary processing module in the single chip computer device of a kind of RS485 of expansion communication interface of the utility model.
In figure, 1. main processing block, 2. module select signal line, 3.SPI interface signal line, 4. expands RS485 auxiliary processing module, 5.RS485 chip, 6.RS485 interface, 7.I/O control interface, 8.UART interface, 9. auxiliary process single-chip microcomputer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The utility model provides a kind of single chip computer device expanding RS485 communication interface, as shown in Figure 1, comprise main processing block 1, main processing block 1 is MSP430F149 single-chip microcomputer, and main processing block 1 is connected with expansion RS485 auxiliary processing module 4 by module select signal line 2, SPI interface signal line 3, as shown in Figure 2, expansion RS485 auxiliary processing module 4 comprises auxiliary process single-chip microcomputer 9, auxiliary process single-chip microcomputer 9 is MSP430F2132 single-chip microcomputer, and SPI interface signal line 3 connects the UCB0STE interface of auxiliary process single-chip microcomputer 9, UCB0SIMO interface, UCB0SOMI interface and UCB0CLK interface, signal wire 2 selected by auxiliary process single-chip microcomputer 9 also link block, auxiliary process single-chip microcomputer 9 is also by USRT interface 8, I/O control interface 7 is connected with RS485 chip 5, USRT interface 8 comprises UCA0TXD interface and UCA0TXD interface, RS485 chip 5 has RS485 interface 6, and RS485 chip 5 is MAX3485 chip.
The using method of the single chip computer device of a kind of RS485 of expansion communication interface of the utility model is, auxiliary process single-chip microcomputer 9 is by UART interface 8, I/O control interface 7 connects RS485 chip 5, extend RS485 interface 6, main processing block 1 is selected to carry out exchanges data with expansion RS485 auxiliary processing module 4 by module select signal line 2, auxiliary process single-chip microcomputer 9 passes through SPI signal wire 3 by the data information transfer of RS485 interface 6 to main processing block 1, thus make main processing block 1 extend RS485 interface 6 by SPI interface signal line 3 connection expansion RS485 auxiliary processing module 4 for main processing block 1.
Claims (6)
1. expand the single chip computer device of RS485 communication interface for one kind, it is characterized in that, comprise main processing block (1), main processing block (1) is by module select signal line (2), SPI interface signal line (3) is connected with expansion RS485 auxiliary processing module (4), expansion RS485 auxiliary processing module (4) comprises auxiliary process single-chip microcomputer (9), auxiliary process single-chip microcomputer (9) is by UART interface (8), I/O control interface (7) is connected with RS485 chip (5), RS485 chip (5) is provided with RS485 interface (6).
2. a kind of single chip computer device expanding RS485 communication interface according to claim 1, it is characterized in that, described main processing block (1) is connected with auxiliary process single-chip microcomputer (9), and main processing single chip (1) is MSP430F149 single-chip microcomputer.
3. a kind of single chip computer device expanding RS485 communication interface according to claim 1, is characterized in that, described auxiliary process single-chip microcomputer (9) is MSP430F2132 single-chip microcomputer.
4. the single chip computer device of any one expansion RS485 communication interface according to claim 1-3, it is characterized in that, described RS485 chip (5) is MAX3485 chip.
5. the single chip computer device of any one expansion RS485 communication interface according to claim 1-3, it is characterized in that, described SPI interface signal line (3) connects the UCB0STE interface of auxiliary process single-chip microcomputer (9), UCB0SIMO interface, UCB0SOMI interface and UCB0CLK interface.
6. the single chip computer device of any one expansion RS485 communication interface according to claim 1-3, it is characterized in that, described UART interface (3) comprises UCA0TXD interface and UCA0RXD interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113291.5U CN204423364U (en) | 2015-02-16 | 2015-02-16 | A kind of single chip computer device expanding RS485 communication interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113291.5U CN204423364U (en) | 2015-02-16 | 2015-02-16 | A kind of single chip computer device expanding RS485 communication interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204423364U true CN204423364U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520113291.5U Expired - Fee Related CN204423364U (en) | 2015-02-16 | 2015-02-16 | A kind of single chip computer device expanding RS485 communication interface |
Country Status (1)
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| CN (1) | CN204423364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680900A (en) * | 2016-03-21 | 2016-06-15 | 北京龙鼎源科技股份有限公司 | Data transmission system and method |
-
2015
- 2015-02-16 CN CN201520113291.5U patent/CN204423364U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680900A (en) * | 2016-03-21 | 2016-06-15 | 北京龙鼎源科技股份有限公司 | Data transmission system and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20160216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |