Simple "hello world" style program for X-NUCLEO-IKS01A1 MEMS Inertial
Dependencies: BLE_API X_NUCLEO_IDB0XA1 X_NUCLEO_IKS01A1 mbed
Fork of HelloWorld_IKS01A1 by
Smartcard mode functions
[USART_Private_Functions]
Smartcard mode functions. More...
Functions | |
void | USART_SetGuardTime (USART_TypeDef *USARTx, uint8_t USART_GuardTime) |
Sets the specified USART guard time. | |
void | USART_SmartCardCmd (USART_TypeDef *USARTx, FunctionalState NewState) |
Enables or disables the USART's Smart Card mode. | |
void | USART_SmartCardNACKCmd (USART_TypeDef *USARTx, FunctionalState NewState) |
Enables or disables NACK transmission. |
Detailed Description
Smartcard mode functions.
=============================================================================== Smartcard mode functions =============================================================================== This subsection provides a set of functions allowing to manage the USART Smartcard communication. The Smartcard interface is designed to support asynchronous protocol Smartcards as defined in the ISO 7816-3 standard. The USART can provide a clock to the smartcard through the SCLK output. In smartcard mode, SCLK is not associated to the communication but is simply derived from the internal peripheral input clock through a 5-bit prescaler. Smartcard communication is possible through the following procedure: 1. Configures the Smartcard Prescaler using the USART_SetPrescaler() function. 2. Configures the Smartcard Guard Time using the USART_SetGuardTime() function. 3. Program the USART clock using the USART_ClockInit() function as following: - USART Clock enabled - USART CPOL Low - USART CPHA on first edge - USART Last Bit Clock Enabled 4. Program the Smartcard interface using the USART_Init() function as following: - Word Length = 9 Bits - 1.5 Stop Bit - Even parity - BaudRate = 12096 baud - Hardware flow control disabled (RTS and CTS signals) - Tx and Rx enabled 5. Optionally you can enable the parity error interrupt using the USART_ITConfig() function 6. Enable the USART using the USART_Cmd() function. 7. Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function. 8. Enable the Smartcard interface using the USART_SmartCardCmd() function. Please refer to the ISO 7816-3 specification for more details. @note It is also possible to choose 0.5 stop bit for receiving but it is recommended to use 1.5 stop bits for both transmitting and receiving to avoid switching between the two configurations. @note In smartcard mode, the following bits must be kept cleared: - LINEN bit in the USART_CR2 register. - HDSEL and IREN bits in the USART_CR3 register. @note Smartcard mode is available on USART peripherals only (not available on UART4 and UART5 peripherals).
Function Documentation
void USART_SetGuardTime | ( | USART_TypeDef * | USARTx, |
uint8_t | USART_GuardTime | ||
) |
Sets the specified USART guard time.
- Parameters:
-
USARTx,: where x can be 1, 2, 3 or 6 to select the USART or UART peripheral. USART_GuardTime,: specifies the guard time.
- Return values:
-
None
Definition at line 907 of file stm32f4xx_usart.c.
void USART_SmartCardCmd | ( | USART_TypeDef * | USARTx, |
FunctionalState | NewState | ||
) |
Enables or disables the USART's Smart Card mode.
- Parameters:
-
USARTx,: where x can be 1, 2, 3 or 6 to select the USART or UART peripheral. NewState,: new state of the Smart Card mode. This parameter can be: ENABLE or DISABLE.
- Return values:
-
None
Definition at line 926 of file stm32f4xx_usart.c.
void USART_SmartCardNACKCmd | ( | USART_TypeDef * | USARTx, |
FunctionalState | NewState | ||
) |
Enables or disables NACK transmission.
- Parameters:
-
USARTx,: where x can be 1, 2, 3 or 6 to select the USART or UART peripheral. NewState,: new state of the NACK transmission. This parameter can be: ENABLE or DISABLE.
- Return values:
-
None
Definition at line 951 of file stm32f4xx_usart.c.
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