/**
* @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 Configure the SMARTCARD associated USART peripheral
* @param hsc: SMARTCARD handle
* @retval None
*/
static void SMARTCARD_SetConfig(SMARTCARD_HandleTypeDef *hsc)
{
uint32_t tmpreg = 0x00000000;
uint32_t clocksource = 0x00000000;
/* Check the parameters */
assert_param(IS_SMARTCARD_INSTANCE(hsc->Instance));
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_POLARITY(hsc->Init.CLKPolarity));
assert_param(IS_SMARTCARD_PHASE(hsc->Init.CLKPhase));
assert_param(IS_SMARTCARD_LASTBIT(hsc->Init.CLKLastBit));
assert_param(IS_SMARTCARD_ONE_BIT_SAMPLE(hsc->Init.OneBitSampling));
assert_param(IS_SMARTCARD_NACK(hsc->Init.NACKState));
assert_param(IS_SMARTCARD_TIMEOUT(hsc->Init.TimeOutEnable));
assert_param(IS_SMARTCARD_AUTORETRY_COUNT(hsc->Init.AutoRetryCount));
/*-------------------------- USART CR1 Configuration -----------------------*/
/* In SmartCard mode, M and PCE are forced to 1 (8 bits + parity).
* Oversampling is forced to 16 (OVER8 = 0).
* Configure the Parity and Mode:
* set PS bit according to hsc->Init.Parity value
* set TE and RE bits according to hsc->Init.Mode value */
tmpreg = (uint32_t) hsc->Init.Parity | hsc->Init.Mode;
/* in case of TX-only mode, if NACK is enabled, the USART must be able to monitor
the bidirectional line to detect a NACK signal in case of parity error.
Therefore, the receiver block must be enabled as well (RE bit must be set). */
if((hsc->Init.Mode == SMARTCARD_MODE_TX) && (hsc->Init.NACKState == SMARTCARD_NACK_ENABLE))
{
tmpreg |= USART_CR1_RE;
}
tmpreg |= (uint32_t) hsc->Init.WordLength;
MODIFY_REG(hsc->Instance->CR1, USART_CR1_FIELDS, tmpreg);
/*-------------------------- USART CR2 Configuration -----------------------*/
/* Stop bits are forced to 1.5 (STOP = 11) */
tmpreg = hsc->Init.StopBits;
/* Synchronous mode is activated by default */
tmpreg |= (uint32_t) USART_CR2_CLKEN | hsc->Init.CLKPolarity;
tmpreg |= (uint32_t) hsc->Init.CLKPhase | hsc->Init.CLKLastBit;
tmpreg |= (uint32_t) hsc->Init.TimeOutEnable;
MODIFY_REG(hsc->Instance->CR2, USART_CR2_FIELDS, tmpreg);
/*-------------------------- USART CR3 Configuration -----------------------*/
/* Configure
* - one-bit sampling method versus three samples' majority rule
* according to hsc->Init.OneBitSampling
* - NACK transmission in case of parity error according
* to hsc->Init.NACKEnable
* - autoretry counter according to hsc->Init.AutoRetryCount */
tmpreg = (uint32_t) hsc->Init.OneBitSampling | hsc->Init.NACKState;
tmpreg |= (uint32_t) (hsc->Init.AutoRetryCount << SMARTCARD_CR3_SCARCNT_LSB_POS);
MODIFY_REG(hsc->Instance-> CR3,USART_CR3_FIELDS, tmpreg);
/*-------------------------- USART GTPR Configuration ----------------------*/
tmpreg = (uint32_t) (hsc->Init.Prescaler | (hsc->Init.GuardTime << SMARTCARD_GTPR_GT_LSB_POS));
MODIFY_REG(hsc->Instance->GTPR, (uint32_t)(USART_GTPR_GT|USART_GTPR_PSC), tmpreg);
/*-------------------------- USART RTOR Configuration ----------------------*/
tmpreg = (uint32_t) (hsc->Init.BlockLength << SMARTCARD_RTOR_BLEN_LSB_POS);
if(hsc->Init.TimeOutEnable == SMARTCARD_TIMEOUT_ENABLE)
{
assert_param(IS_SMARTCARD_TIMEOUT_VALUE(hsc->Init.TimeOutValue));
tmpreg |= (uint32_t) hsc->Init.TimeOutValue;
}
MODIFY_REG(hsc->Instance->RTOR, (USART_RTOR_RTO|USART_RTOR_BLEN), tmpreg);
/*-------------------------- USART BRR Configuration -----------------------*/
SMARTCARD_GETCLOCKSOURCE(hsc, clocksource);
switch (clocksource)
{
case SMARTCARD_CLOCKSOURCE_PCLK1:
hsc->Instance->BRR = (uint16_t)(HAL_RCC_GetPCLK1Freq() / hsc->Init.BaudRate);
break;
case SMARTCARD_CLOCKSOURCE_PCLK2:
hsc->Instance->BRR = (uint16_t)(HAL_RCC_GetPCLK2Freq() / hsc->Init.BaudRate);
break;
case SMARTCARD_CLOCKSOURCE_HSI:
hsc->Instance->BRR = (uint16_t)(HSI_VALUE / hsc->Init.BaudRate);
break;
case SMARTCARD_CLOCKSOURCE_SYSCLK:
hsc->Instance->BRR = (uint16_t)(HAL_RCC_GetSysClockFreq() / hsc->Init.BaudRate);
break;
case SMARTCARD_CLOCKSOURCE_LSE:
hsc->Instance->BRR = (uint16_t)(LSE_VALUE / hsc->Init.BaudRate);
break;
default:
break;
}
}
/**
* @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;
}