UART1 Smart Card mode

  ******************** (C)COPYRIGHT 2014 STMicroelectronics *******************
  * @file    UART1/UART1_SmartCard/readme.txt 
  * @author  MCD Application Team
  * @version V2.2.0
  * @date    30-September-2014
  * @brief   Description of the UART1 Smart card Example.
  ******************************************************************************
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  

Example description

This example provides a description of how to use the UART1 in Smart Card mode. The example gives only the possibility to read the ATR and decode it into a predefined buffer.

First, the code waits for a card insertion. If the card is detected, a reset signal is applied to the card through its reset pin.

As response to this reset, the card transmits the ATR which is stored in a predefined buffer. Once the ATR is received, it is decoded and stored in a specific structure (SC_A2R) and the card protocol type is stored in a variable (ATRDecodeStatus).

The UART1 Smartcard mode supports asynchronous protocol Smartcards as defined in the ISO 7816-3(Class A) standard, please refer to the ISO 7816-3 specification or to the application note AN2646 (Smartcard interface with the STM8S20x) for more details.

The UART1 is configured as follows:

• Word Length = 9 Bits
• 1.5 Stop Bit
• Even parity
• BaudRate = 10752 baud
• Transmit and receive enabled
• UART1 Clock enabled
• UART1 CPOL: Clock is active low
• UART1 CPHA: Data is captured on the second edge
• UART1 LastBit: The clock pulse of the last data bit is not output to the SCLK pin (Last bit Disabled).

Directory contents

• UART1\UART1_SmartCard\main.c Main file containing the "main" function
• UART1\UART1_SmartCard\stm8s_conf.h Library Configuration file
• UART1\UART1_SmartCard\stm8s_it.c Interrupt routines source
• UART1\UART1_SmartCard\stm8s_it.h Interrupt routines declaration

Hardware and Software environment

• This example runs on STM8S High density and Low density devices and on STM8A High density devices.

• This example has been tested with STMicroelectronics STM8/128-EVAL evaluation board and can be easily tailored to any other development board.

• STM8/128-EVAL Set-up
  • Plug a smart card (ISO7816-3 T=0 compatible) into the dedicated smart card connector CN12.

How to use it ?

In order to make the program work, you must do the following :

• Copy all source files from this example folder to the template folder under Project
• Open your preferred toolchain
• Rebuild all files and load your image into target memory
• Run the example
• Check the card protocol type variable(ATRDecodeStatus)

Note:

• High-Density STM8A devices are the STM8AF52xx STM8AF6269/8x/Ax, STM8AF51xx, and STM8AF6169/7x/8x/9x/Ax microcontrollers where the Flash memory density ranges between 32 to 128 Kbytes
• Medium-Density STM8A devices are the STM8AF622x/4x, STM8AF6266/68, STM8AF612x/4x, and STM8AF6166/68 microcontrollers where the Flash memory density ranges between 8 to 32 Kbytes
• High-Density STM8S devices are the STM8S207xx, STM8S007 and STM8S208xx microcontrollers where the Flash memory density ranges between 32 to 128 Kbytes.
• Medium-Density STM8S devices are the STM8S105x and STM8S005 microcontrollers where the Flash memory density ranges between 16 to 32-Kbytes.
• Low-Density STM8S devices are the STM8S103xx, STM8S003 and STM8S903xx microcontrollers where the Flash density is 8 Kbytes.

© COPYRIGHT STMicroelectronics