https://github.com/tomatosoup97/chafon-rfid-driver

https://github.com/tomatosoup97/chafon-rfid-driver

Last synced: about 5 hours ago
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• Host: GitHub
• URL: https://github.com/tomatosoup97/chafon-rfid-driver
• Owner: Tomatosoup97
• License: gpl-2.0
• Created: 2024-04-16T10:45:31.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2024-06-10T11:29:41.000Z (5 months ago)
• Last Synced: 2024-06-10T13:11:50.077Z (5 months ago)
• Language: C
• Size: 40 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Kernel driver for Chafon RFID tags reader

Read RFID tags using the Chafon UHF-based readers via a kernel driver.

Was tested and confirmed to work on CF-RU5202 model. Other models while operate in a

may require adjustments in the code.

## User guide

1. Ensure that Chafon RFID reader is connected and exposed at `/dev/ttyUSB0`

1. Load the kernel driver module

    `$ sudo insmod rfid_reader_m.ko`

1. Invoke `SET_FILE` ioctl (see section below about IOCTL calls)

1. Adjust parameters if needed

1. Call `read` on the driver's file

1. The returned buffer shall be of type `inventory_data_t` (see [this file](./rfid/reader.h))

A working example on how to use and interact with the driver is presented in

[userspace_example](./userspace_example/read.c).

## Supported IOCTL calls to the driver:

For details about IOCTL themselves, please refer to the

[reference](https://man7.org/linux/man-pages/man2/ioctl.2.html)

- `SET_FILE (0x01)`: Sets file descriptor pointing to open serial file representing RFID

    reader to use by the driver. Obligatory command to run before attempting to read.

- `SET_SCAN_TIME (0x02)`: Set device's scan time. Integer value in range [3 - 255]

- `SET_POWER (0x03)`: Set device's power. Integer value in range [0 - 30]

- `SET_BUZZER (0x04)`: Enable or disable buzzer, sound effect during a scan. Pass 1 to

    enable and 0 to disable.