A method of driving nfc module under Android platform

Abstract

The invention discloses a method for driving a near-field communication module under an Android platform. A universal asynchronous transceiver transmitter and a high-frequency radio frequency identification read-write chip with near-field communication are respectively connected and communicated with pins of a sending end and a receiving end. The method includes the following steps: registering a character device through the application program interface of the driving platform, and the Android platform and the character device interact to read and write operations, and the underlying system calls the driver of the Serio bus; A high-frequency radio frequency identification read-write chip for near-field communication, associating the high-frequency radio frequency identification read-write chip with near-field communication with the registered character device; through a standard serial input and output virtual bus driver application interface Register communication interactive reading and writing and its interrupt processing function, and perform reading and writing operations with the high-frequency radio frequency identification reading and writing chip with near-field communication through the interrupt processing function. The invention solves the problem of implementing data interaction between the non-I2C port and the NFC chip.

Description

technical field [0001] The invention relates to the field of near field communication, in particular to a method for driving an NFC (Near Field Communication, near field communication) module by using a Serio bus (Serial I / O, serial input and output bus) under an Android platform. Background technique [0002] At present, the Android system has been widely used at home and abroad, and its own code is also developing rapidly to meet various hardware devices and business needs. However, the near-field wireless communication technology (NFC) chips of current Android devices are all embedded The I2C (Inter-integrated circuit, two-wire serial bus) port of the MCU (Micro Controller Unit, micro-control unit) interacts, which is based on the driver provided by the chip manufacturer. However, many of the MCU chip manufacturers have no I2C port, or cannot design and realize the connection on the schematic diagram, etc., and can only use non-I2C ports for data interaction with NFC chip...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of data interaction between the above-mentioned non-I2C port and the NFC chip, the present invention proposes a method for implementing Serio bus control on the Android platform to control the NFC chip for data interaction, which is suitable for high-frequency radio frequency identification readers with NFC The Android platform terminal device of the chip PN544 can add MCU chips without I2C ports at will, or can not design the function of communicating with NFC chips under the conditions of connecting I2C on the schematic diagram.

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