/*!
    \file    readme.txt
    \brief   Description of the USB CCID demo

    \version 2026-01-31, V3.8.0, firmware update for GD32F1x0(x=5)
*/

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*/

  This example is based on the GD32150R-EVAL-V1.3 board, it provides a description of how to 
use the USBD peripheral.

  This DEMO shows how to read data from and write data to USB devices using the CCID protocol. When 
plugged into host (WinXP, Windows7), the USB device appears as a smart card reader device using the 
windows native CCID driver. This demo should combine upper computer and CCID device, the present smart 
card is china mobile card.

  Please note that although the USB CCID class implements all the CCID commands, the smartcard interface
implements only the "Answer to Reset" following a reception of IccPowerOn command from host.

  In order to make the example work, the hardware platform must be connected as follows:
  - PA8 is connected to SC_CLK
  - PA9 is connected to SC_IO
  - PC1 is connected to SC_RST

  Note: The PA9 pin should be pulled up to 3.3V by 1.5K resistance.
