serial communication device
A serial communication and serial data technology, applied in the field of serial communication devices, can solve the problem of consuming large host resources and achieve the effect of saving host resources
Active Publication Date: 2020-02-14
C SKY MICROSYST CO LTD
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- Description
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Problems solved by technology
The host realizes serial communication through GPIO by means of sending / receiving interrupts. The serial communication device will frequently initiate interrupt requests to the host, and then the host responds to the interrupt requests and frequently writes or reads serial data by bit. During this process, Need to consume a lot of host resources
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[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] An embodiment of the present invention provides a serial communication device for realizing data transmission between a master and a slave, such as figure 1 As shown, the device includes: APB bus interface module 1, input and output interface module 2, control module 3, transceiver enable module 4, shift register module 5 and interrupt...
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The invention provides a serial communication device. The device includes: an APB bus interface module, an input and output interface module, a control module, a transceiver enabling module, a shift register module and an interrupt generation module, wherein the shift register module obtains the write data issued by the host through the APB bus interface module , when the shift enable signal is valid, the write data is serially shifted out, and the shifted serial data is sent to the slave machine through the input and output interface module, and the serial data uploaded by the slave machine is obtained through the input and output interface module. When the shift enable signal is valid, the serial data is serially shifted in, and the read data is obtained according to the shifted-in serial data, and the read data is uploaded to the host through the APB bus interface module. The invention can save the resources consumed by the serial communication of the host computer.
Description
technical field [0001] The invention relates to the technical field of embedded systems, in particular to a serial communication device. Background technique [0002] Serial communication is a communication method widely used at present, and its application range is extremely wide, such as computer peripherals, industrial control and other occasions. It can not only receive the serial data input from the peripheral equipment, and convert it into the parallel data required inside the computer, but also convert the parallel data inside the computer into serial data, and send it to the peripheral equipment. For devices that do not require high data transfer rates, using serial communication is a cost-effective design solution. [0003] GPIO (General Purpose Input Output) refers to general-purpose input and output. The host can write or read the level of GPIO through the bus to realize serial communication. The host realizes serial communication through GPIO by sending / receivi...
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IPC IPC(8): G06F13/40G06F13/42
CPCG06F13/4022G06F13/4282G06F2213/0002G06F13/382G06F13/24G06F13/4068
Inventor 郭明昆孟建熠邱蔚杨军
Owner C SKY MICROSYST CO LTD