A signal machine based on spi bus control

A technology of SPI bus and signal machine, applied in the field of signal machine based on SPI bus control, can solve the problems of trouble-free detection management, complex control technology and high cost, and achieve the effect of realizing the number of lamp groups, reducing cost and reducing cost.

CN104299429BActive Publication Date: 2016-07-06ANHUI KELI INFORMATION IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-07-06

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Abstract

The invention relates to an annuciator based on an SPI bus controller. The annuciator comprises a master control module and a drive module. The master control module is connected with the drive module through an SPI bus. The master control module is used for achieving yellow light flickering control of signal lights, real-time monitoring of button triggering signals and running control over the drive module. The drive module is used for achieving the switching control of the traffic signal lights and real-time monitoring of signal light states. The master control module comprises a master control CPU, a first SPI chip, a second SPI chip, a button interface circuit and a yellow light control circuit. The drive module comprises a third SPI chip, a fourth SPI chip, a traffic light control circuit and a traffic light state monitoring circuit. According to the technical scheme, the annuciator has the advantages of being low in cost, capable of being moderately expanded and the like, and can meet the major development requirement for current traffic signal control.
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Description

Technical field

[0001] The invention relates to the technical field of road traffic signal control, in particular to a signal machine based on SPI bus control. Background technique

[0002] The semaphore is used to control the operation of road traffic lights to ensure the smooth passage of road traffic and is an important part of the urban traffic system. There are two main types of current semaphores: one is a low-cost single-point semaphore that directly controls the semaphore by a single-chip microcomputer. The number of semaphores that can be controlled by this type of semaphore is limited by the number of IOs, and there is no corresponding fault detection management. , It is impossible to realize the yellow flash control when the system fails; this type of signal machine is mainly used in some counties and towns and other areas with low signal control requirements, and is the development basis of low-cost signal machines. Another type of semaphore is a distributed semaphor...

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Embodiment Construction

[0022] The present invention will be further explained below in conjunction with the drawings:

[0023] A signal machine based on SPI bus control includes a main control module and a drive module. The main control module is connected to the drive module through the SPI bus. The SPI bus is a high-speed, full-duplex, and synchronous communication bus. The main control device implements unified control of the system. The main control module is used to realize the yellow flash control of the signal lamp, real-time monitoring of the key trigger signal and control the operation of the drive module. The driving module is used to realize the on-off control of the red and green signal lights and the real-time monitoring of the status of the signal lights. Generally, the number of intersection signal lights is less than or equal to 16 groups; this signal machine adopts an SPI chip with 16 IO interfaces, and each chip can realize the control or monitoring of 16 signal lights or 16 buttons....