/**
* @brief Initializes the SmartCard mode according to the specified
* parameters in the SMARTCARD_InitTypeDef and create the associated handle .
* @param hsc: pointer to a SMARTCARD_HandleTypeDef structure that contains
* the configuration information for SMARTCARD module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_SMARTCARD_Init(SMARTCARD_HandleTypeDef *hsc)
{
/* Check the SMARTCARD handle allocation */
if(hsc == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
assert_param(IS_SMARTCARD_NACK_STATE(hsc->Init.NACKState));
if(hsc->gState == HAL_SMARTCARD_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hsc->Lock = HAL_UNLOCKED;
/* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
HAL_SMARTCARD_MspInit(hsc);
}
hsc->gState = HAL_SMARTCARD_STATE_BUSY;
/* Set the Prescaler */
MODIFY_REG(hsc->Instance->GTPR, USART_GTPR_PSC, hsc->Init.Prescaler);
/* Set the Guard Time */
MODIFY_REG(hsc->Instance->GTPR, USART_GTPR_GT, ((hsc->Init.GuardTime)<<8));
/* Set the Smartcard Communication parameters */
SMARTCARD_SetConfig(hsc);
/* 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.*/
hsc->Instance->CR2 &= ~USART_CR2_LINEN;
hsc->Instance->CR3 &= ~(USART_CR3_IREN | USART_CR3_HDSEL);
/* Enable the SMARTCARD Parity Error Interrupt */
__HAL_SMARTCARD_ENABLE_IT(hsc, SMARTCARD_IT_PE);
/* Enable the SMARTCARD Framing Error Interrupt */
__HAL_SMARTCARD_ENABLE_IT(hsc, SMARTCARD_IT_ERR);
/* Enable the Peripheral */
__HAL_SMARTCARD_ENABLE(hsc);
/* Configure the Smartcard NACK state */
MODIFY_REG(hsc->Instance->CR3, USART_CR3_NACK, hsc->Init.NACKState);
/* Enable the SC mode by setting the SCEN bit in the CR3 register */
hsc->Instance->CR3 |= (USART_CR3_SCEN);
/* Initialize the SMARTCARD state*/
hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
hsc->gState= HAL_SMARTCARD_STATE_READY;
hsc->RxState= HAL_SMARTCARD_STATE_READY;
return HAL_OK;
}
/**
* @brief Configures the SMARTCARD peripheral.
* @param hsc: Pointer to a SMARTCARD_HandleTypeDef structure that contains
* the configuration information for the specified SMARTCARD module.
* @retval None
*/
static void SMARTCARD_SetConfig(SMARTCARD_HandleTypeDef *hsc)
{
/* Check the parameters */
assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
assert_param(IS_SMARTCARD_POLARITY(hsc->Init.CLKPolarity));
assert_param(IS_SMARTCARD_PHASE(hsc->Init.CLKPhase));
assert_param(IS_SMARTCARD_LASTBIT(hsc->Init.CLKLastBit));
assert_param(IS_SMARTCARD_BAUDRATE(hsc->Init.BaudRate));
assert_param(IS_SMARTCARD_WORD_LENGTH(hsc->Init.WordLength));
assert_param(IS_SMARTCARD_STOPBITS(hsc->Init.StopBits));
assert_param(IS_SMARTCARD_PARITY(hsc->Init.Parity));
assert_param(IS_SMARTCARD_MODE(hsc->Init.Mode));
assert_param(IS_SMARTCARD_NACK_STATE(hsc->Init.NACKState));
/* The LBCL, CPOL and CPHA bits have to be selected when both the transmitter and the
receiver are disabled (TE=RE=0) to ensure that the clock pulses function correctly. */
CLEAR_BIT(hsc->Instance->CR1, (uint32_t)(USART_CR1_TE | USART_CR1_RE));
/*-------------------------- SMARTCARD CR2 Configuration ------------------------*/
/* Clear CLKEN, CPOL, CPHA and LBCL bits */
/* Configure the SMARTCARD Clock, CPOL, CPHA and LastBit -----------------------*/
/* Set CPOL bit according to hsc->Init.CLKPolarity value */
/* Set CPHA bit according to hsc->Init.CLKPhase value */
/* Set LBCL bit according to hsc->Init.CLKLastBit value */
MODIFY_REG(hsc->Instance->CR2,
((uint32_t)(USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_CLKEN | USART_CR2_LBCL)),
((uint32_t)(USART_CR2_CLKEN | hsc->Init.CLKPolarity | hsc->Init.CLKPhase| hsc->Init.CLKLastBit)) );
/* Set Stop Bits: Set STOP[13:12] bits according to hsc->Init.StopBits value */
MODIFY_REG(hsc->Instance->CR2, USART_CR2_STOP,(uint32_t)(hsc->Init.StopBits));
/*-------------------------- SMARTCARD CR1 Configuration -----------------------*/
/* Clear M, PCE, PS, TE and RE bits */
/* Configure the SMARTCARD Word Length, Parity and mode:
Set the M bits according to hsc->Init.WordLength value
Set PCE and PS bits according to hsc->Init.Parity value
Set TE and RE bits according to hsc->Init.Mode value */
MODIFY_REG(hsc->Instance->CR1,
((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE)),
((uint32_t)(hsc->Init.WordLength | hsc->Init.Parity | hsc->Init.Mode)) );
/*-------------------------- USART CR3 Configuration -----------------------*/
/* Clear CTSE and RTSE bits */
CLEAR_BIT(hsc->Instance->CR3, (USART_CR3_RTSE | USART_CR3_CTSE));
/*-------------------------- USART BRR Configuration -----------------------*/
if(hsc->Instance == USART1)
{
hsc->Instance->BRR = SMARTCARD_BRR(HAL_RCC_GetPCLK2Freq(), hsc->Init.BaudRate);
}
else
{
hsc->Instance->BRR = SMARTCARD_BRR(HAL_RCC_GetPCLK1Freq(), hsc->Init.BaudRate);
}
}
/**
* @brief Initializes the SmartCard mode according to the specified
* parameters in the SMARTCARD_HandleTypeDef and create the associated handle.
* @param hsc: Pointer to a SMARTCARD_HandleTypeDef structure that contains
* the configuration information for the specified SMARTCARD module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_SMARTCARD_Init(SMARTCARD_HandleTypeDef *hsc)
{
/* Check the SMARTCARD handle allocation */
if(hsc == NULL)
{
return HAL_ERROR;
}
/* Check Wordlength, Parity and Stop bits parameters */
if ( (!(IS_SMARTCARD_WORD_LENGTH(hsc->Init.WordLength)))
||(!(IS_SMARTCARD_STOPBITS(hsc->Init.StopBits)))
||(!(IS_SMARTCARD_PARITY(hsc->Init.Parity))) )
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
assert_param(IS_SMARTCARD_NACK_STATE(hsc->Init.NACKState));
assert_param(IS_SMARTCARD_PRESCALER(hsc->Init.Prescaler));
if(hsc->State == HAL_SMARTCARD_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hsc->Lock = HAL_UNLOCKED;
/* Init the low level hardware */
HAL_SMARTCARD_MspInit(hsc);
}
hsc->State = HAL_SMARTCARD_STATE_BUSY;
/* Disable the Peripheral */
__HAL_SMARTCARD_DISABLE(hsc);
/* Set the Prescaler */
MODIFY_REG(hsc->Instance->GTPR, USART_GTPR_PSC, hsc->Init.Prescaler);
/* Set the Guard Time */
MODIFY_REG(hsc->Instance->GTPR, USART_GTPR_GT, ((hsc->Init.GuardTime)<<8));
/* Set the Smartcard Communication parameters */
SMARTCARD_SetConfig(hsc);
/* 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.*/
CLEAR_BIT(hsc->Instance->CR2, USART_CR2_LINEN);
CLEAR_BIT(hsc->Instance->CR3, (USART_CR3_IREN | USART_CR3_HDSEL));
/* Enable the Peripharal */
__HAL_SMARTCARD_ENABLE(hsc);
/* Configure the Smartcard NACK state */
MODIFY_REG(hsc->Instance->CR3, USART_CR3_NACK, hsc->Init.NACKState);
/* Enable the SC mode by setting the SCEN bit in the CR3 register */
SET_BIT(hsc->Instance->CR3, USART_CR3_SCEN);
/* Initialize the SMARTCARD state*/
hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
hsc->State= HAL_SMARTCARD_STATE_READY;
return HAL_OK;
}
