A device for realizing i2c repeated reading and writing control

Abstract

The invention discloses an apparatus for realizing I2C repeated reading-writing control. The apparatus comprises a main controller, a repeated reading-writing controller and an I2C controller, wherein the repeated reading-writing controller is connected between the main controller and the I2C controller; the main controller sends a reading-writing command to the I2C controller through the repeated reading-writing controller; the I2C controller is directly associated with an external I2C device to execute the reading-writing command; the I2C controller feeds back a completion state signal, an error state signal and collected data to the repeated reading-writing controller according to an executive result; and the repeated reading-writing controller identifies the signals fed back by the I2C controller and only feeds back the effective signal to the main controller. According to the apparatus, the repeated reading-writing controller is added between the main controller and the I2C controller to replace the main controller to wait for and process the reading-writing command for the I2C controller; and only the effective signal is fed back to the main controller, so that the processing time of the main controller is not wasted.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to a device for realizing I2C repeated reading and writing control. Background technique [0002] In some applications of I2C (inter-integrated circuit, a standard interface circuit, invented by PHILIPS) such as panel control (including LED display and button scanning), the main controller needs to read Get the key input value of the I2C panel to judge whether there is a key input, which will inevitably consume a lot of processing time of the main controller. [0003] In view of the above technical problems, the prior art realizes "A Device and Method for Automatically Reading and Writing Internal Integrated Circuit Devices" (publication number CN1558332), which discloses a way to read and write I2C devices using hardware instead of CPU simulation . If this prior art needs to read and write I2C devices repeatedly according to a certain interval, the usual practice is as follo...

AI Technical Summary

Problems solved by technology

[0002] In some applications of I2C (inter-integrated circuit, a standard interface circuit, invented by PHILIPS) such as panel control (including LED display and button scanning), the main controller needs to read Take the key input value of the I2C panel to judge whether there is a key input, which will inevitably consume a lot of processing time of the main controller

Images