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rt-thread-official/bsp/ft32/libraries/FT32F0xx/FT32F0xx_Driver/Src/ft32f0xx_usart.c

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/**
******************************************************************************
* @file ft32f0xx_usart.c
* @author FMD AE
* @brief This file provides firmware functions to manage the following
* functionalities of the Universal synchronous asynchronous receiver
* transmitter (USART):
* + Initialization and Configuration
* + STOP Mode
* + AutoBaudRate
* + Data transfers
* + Multi-Processor Communication
* + LIN mode
* + Half-duplex mode
* + Smartcard mode
* + IrDA mode
* + RS485 mode
* + DMA transfers management
* + Interrupts and flags management
* @version V1.0.0
* @data 2021-07-01
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "ft32f0xx_usart.h"
#include "ft32f0xx_rcc.h"
/*!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) */
#define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M | USART_CR1_PCE | \
USART_CR1_PS | USART_CR1_TE | \
USART_CR1_RE))
/*!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) */
#define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN | USART_CR2_CPOL | \
USART_CR2_CPHA | USART_CR2_LBCL))
/*!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) */
#define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE))
/*!< USART Interrupts mask */
#define IT_MASK ((uint32_t)0x000000FF)
/**
* @brief Deinitializes the USARTx peripheral registers to their default reset values.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @retval None
*/
void USART_DeInit(USART_TypeDef* USARTx)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
if (USARTx == USART1)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
}
else if (USARTx == USART2)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
}
}
/**
* @brief Initializes the USARTx peripheral according to the specified
* parameters in the USART_InitStruct .
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_InitStruct: pointer to a USART_InitTypeDef structure that contains
* the configuration information for the specified USART peripheral.
* @retval None
*/
void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
{
uint32_t divider = 0, apbclock = 0, tmpreg = 0;
RCC_ClocksTypeDef RCC_ClocksStatus;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
/* Disable USART */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
/*---------------------------- USART CR2 Configuration -----------------------*/
tmpreg = USARTx->CR2;
/* Clear STOP[13:12] bits */
tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP);
/* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
/* Set STOP[13:12] bits according to USART_StopBits value */
tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;
/* Write to USART CR2 */
USARTx->CR2 = tmpreg;
/*---------------------------- USART CR1 Configuration -----------------------*/
tmpreg = USARTx->CR1;
/* Clear M, PCE, PS, TE and RE bits */
tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK);
/* Configure the USART Word Length, Parity and mode ----------------------- */
/* Set the M bits according to USART_WordLength value */
/* Set PCE and PS bits according to USART_Parity value */
/* Set TE and RE bits according to USART_Mode value */
tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
USART_InitStruct->USART_Mode;
/* Write to USART CR1 */
USARTx->CR1 = tmpreg;
/*---------------------------- USART CR3 Configuration -----------------------*/
tmpreg = USARTx->CR3;
/* Clear CTSE and RTSE bits */
tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK);
/* Configure the USART HFC -------------------------------------------------*/
/* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
/* Write to USART CR3 */
USARTx->CR3 = tmpreg;
/*---------------------------- USART BRR Configuration -----------------------*/
/* Configure the USART Baud Rate -------------------------------------------*/
RCC_GetClocksFreq(&RCC_ClocksStatus);
if (USARTx == USART1)
{
apbclock = RCC_ClocksStatus.USART1CLK_Frequency;
}
else if (USARTx == USART2)
{
apbclock = RCC_ClocksStatus.USART2CLK_Frequency;
}
/* Determine the integer part */
if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
{
/* (divider * 10) computing in case Oversampling mode is 8 Samples */
divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate));
tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate));
}
else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
{
/* (divider * 10) computing in case Oversampling mode is 16 Samples */
divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate));
tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate));
}
/* round the divider : if fractional part i greater than 0.5 increment divider */
if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2)
{
divider++;
}
/* Implement the divider in case Oversampling mode is 8 Samples */
if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
{
/* get the LSB of divider and shift it to the right by 1 bit */
tmpreg = (divider & (uint16_t)0x000F) >> 1;
/* update the divider value */
divider = (divider & (uint16_t)0xFFF0) | tmpreg;
}
/* Write to USART BRR */
USARTx->BRR = (uint16_t)divider;
}
/**
* @brief Fills each USART_InitStruct member with its default value.
* @param USART_InitStruct: pointer to a USART_InitTypeDef structure
* which will be initialized.
* @retval None
*/
void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
{
/* USART_InitStruct members default value */
USART_InitStruct->USART_BaudRate = 9600;
USART_InitStruct->USART_WordLength = USART_WordLength_8b;
USART_InitStruct->USART_StopBits = USART_StopBits_1;
USART_InitStruct->USART_Parity = USART_Parity_No ;
USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
}
/**
* @brief Initializes the USARTx peripheral Clock according to the
* specified parameters in the USART_ClockInitStruct.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
* structure that contains the configuration information for the specified
* USART peripheral.
* @retval None
*/
void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
/*---------------------------- USART CR2 Configuration -----------------------*/
tmpreg = USARTx->CR2;
/* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */
tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK);
/* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/
/* Set CLKEN bit according to USART_Clock value */
/* Set CPOL bit according to USART_CPOL value */
/* Set CPHA bit according to USART_CPHA value */
/* Set LBCL bit according to USART_LastBit value */
tmpreg |= (uint32_t)(USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit);
/* Write to USART CR2 */
USARTx->CR2 = tmpreg;
}
/**
* @brief Fills each USART_ClockInitStruct member with its default value.
* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
* structure which will be initialized.
* @retval None
*/
void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
{
/* USART_ClockInitStruct members default value */
USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
}
/**
* @brief Enables or disables the specified USART peripheral.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USARTx peripheral.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected USART by setting the UE bit in the CR1 register */
USARTx->CR1 |= USART_CR1_UE;
}
else
{
/* Disable the selected USART by clearing the UE bit in the CR1 register */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
}
}
/**
* @brief Enables or disables the USART's transmitter or receiver.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_Direction: specifies the USART direction.
* This parameter can be any combination of the following values:
* @arg USART_Mode_Tx: USART Transmitter
* @arg USART_Mode_Rx: USART Receiver
* @param NewState: new state of the USART transfer direction.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_MODE(USART_DirectionMode));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the USART's transfer interface by setting the TE and/or RE bits
in the USART CR1 register */
USARTx->CR1 |= USART_DirectionMode;
}
else
{
/* Disable the USART's transfer interface by clearing the TE and/or RE bits
in the USART CR3 register */
USARTx->CR1 &= (uint32_t)~USART_DirectionMode;
}
}
/**
* @brief Enables or disables the USART's 8x oversampling mode.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USART 8x oversampling mode.
* This parameter can be: ENABLE or DISABLE.
* @note This function has to be called before calling USART_Init() function
* in order to have correct baudrate Divider value.
* @retval None
*/
void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
USARTx->CR1 |= USART_CR1_OVER8;
}
else
{
/* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8);
}
}
/**
* @brief Enables or disables the USART's one bit sampling method.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USART one bit sampling method.
* This parameter can be: ENABLE or DISABLE.
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the one bit method by setting the ONEBITE bit in the CR3 register */
USARTx->CR3 |= USART_CR3_ONEBIT;
}
else
{
/* Disable the one bit method by clearing the ONEBITE bit in the CR3 register */
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT);
}
}
/**
* @brief Enables or disables the USART's most significant bit first
* transmitted/received following the start bit.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USART most significant bit first
* transmitted/received following the start bit.
* This parameter can be: ENABLE or DISABLE.
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the most significant bit first transmitted/received following the
start bit by setting the MSBFIRST bit in the CR2 register */
USARTx->CR2 |= USART_CR2_MSBFIRST;
}
else
{
/* Disable the most significant bit first transmitted/received following the
start bit by clearing the MSBFIRST bit in the CR2 register */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST);
}
}
/**
* @brief Enables or disables the binary data inversion.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new defined levels for the USART data.
* This parameter can be:
* @arg ENABLE: Logical data from the data register are send/received in negative
* logic (1=L, 0=H). The parity bit is also inverted.
* @arg DISABLE: Logical data from the data register are send/received in positive
* logic (1=H, 0=L)
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the binary data inversion feature by setting the DATAINV bit in
the CR2 register */
USARTx->CR2 |= USART_CR2_DATAINV;
}
else
{
/* Disable the binary data inversion feature by clearing the DATAINV bit in
the CR2 register */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV);
}
}
/**
* @brief Enables or disables the Pin(s) active level inversion.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_InvPin: specifies the USART pin(s) to invert.
* This parameter can be any combination of the following values:
* @arg USART_InvPin_Tx: USART Tx pin active level inversion.
* @arg USART_InvPin_Rx: USART Rx pin active level inversion.
* @param NewState: new active level status for the USART pin(s).
* This parameter can be:
* @arg ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1).
* @arg DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0).
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_INVERSTION_PIN(USART_InvPin));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the active level inversion for selected pins by setting the TXINV
and/or RXINV bits in the USART CR2 register */
USARTx->CR2 |= USART_InvPin;
}
else
{
/* Disable the active level inversion for selected requests by clearing the
TXINV and/or RXINV bits in the USART CR2 register */
USARTx->CR2 &= (uint32_t)~USART_InvPin;
}
}
/**
* @brief Enables or disables the swap Tx/Rx pins.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USARTx TX/RX pins pinout.
* This parameter can be:
* @arg ENABLE: The TX and RX pins functions are swapped.
* @arg DISABLE: TX/RX pins are used as defined in standard pinout
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the SWAP feature by setting the SWAP bit in the CR2 register */
USARTx->CR2 |= USART_CR2_SWAP;
}
else
{
/* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP);
}
}
/**
* @brief Enables or disables the receiver Time Out feature.
* @param USARTx: where x can be 1, 2 to select the USART peripheral.
* @param NewState: new state of the USARTx receiver Time Out.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the receiver time out feature by setting the RTOEN bit in the CR2
register */
USARTx->CR2 |= USART_CR2_RTOEN;
}
else
{
/* Disable the receiver time out feature by clearing the RTOEN bit in the CR2
register */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN);
}
}
/**
* @brief Sets the receiver Time Out value.
* @param USARTx: where x can be 1, 2 to select the USART peripheral.
* @param USART_ReceiverTimeOut: specifies the Receiver Time Out value.
* @retval None
*/
void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut));
/* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR
register */
USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO);
/* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR
register */
USARTx->RTOR |= USART_ReceiverTimeOut;
}
/**
* @}
*/
/**
* @brief Enables or disables the Auto Baud Rate.
* @param USARTx: where x can be 1or 2 to select the USART peripheral.
* @param NewState: new state of the USARTx auto baud rate.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the auto baud rate feature by setting the ABREN bit in the CR2
register */
USARTx->CR2 |= USART_CR2_ABREN;
}
else
{
/* Disable the auto baud rate feature by clearing the ABREN bit in the CR2
register */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN);
}
}
/**
* @brief Selects the USART auto baud rate method.
* @param USARTx: where x can be 1or 2 to select the USART peripheral.
* @param USART_AutoBaudRate: specifies the selected USART auto baud rate method.
* This parameter can be one of the following values:
* @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement.
* @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement.
* @note This function has to be called before calling USART_Cmd() function.
* @retval None
*/
void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate)
{
/* Check the parameters */
assert_param(IS_USART_123_PERIPH(USARTx));
assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate));
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE);
USARTx->CR2 |= USART_AutoBaudRate;
}
/**
* @}
*/
/**
* @brief Transmits single data through the USARTx peripheral.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param Data: the data to transmit.
* @retval None
*/
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DATA(Data));
/* Transmit Data */
USARTx->TDR = (Data & (uint16_t)0x01FF);
}
/**
* @brief Returns the most recent received data by the USARTx peripheral.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @retval The received data.
*/
uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
/* Receive Data */
return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF);
}
/**
* @}
*/
/**
* @brief Sets the address of the USART node.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_Address: Indicates the address of the USART node.
* @retval None
*/
void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
/* Clear the USART address */
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD);
/* Set the USART address node */
USARTx->CR2 |=((uint32_t)USART_Address << (uint32_t)0x18);
}
/**
* @brief Enables or disables the USART's mute mode.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USART mute mode.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the USART mute mode by setting the MME bit in the CR1 register */
USARTx->CR1 |= USART_CR1_MME;
}
else
{
/* Disable the USART mute mode by clearing the MME bit in the CR1 register */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME);
}
}
/**
* @brief Selects the USART WakeUp method from mute mode.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_WakeUp: specifies the USART wakeup method.
* This parameter can be one of the following values:
* @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
* @arg USART_WakeUp_AddressMark: WakeUp by an address mark
* @retval None
*/
void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp));
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE);
USARTx->CR1 |= USART_WakeUp;
}
/**
* @brief Configure the the USART Address detection length.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_AddressLength: specifies the USART address length detection.
* This parameter can be one of the following values:
* @arg USART_AddressLength_4b: 4-bit address length detection
* @arg USART_AddressLength_7b: 7-bit address length detection
* @retval None
*/
void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength));
USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7);
USARTx->CR2 |= USART_AddressLength;
}
/**
* @}
*/
/**
* @brief Enables or disables the USART's Half Duplex communication.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param NewState: new state of the USART Communication.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
USARTx->CR3 |= USART_CR3_HDSEL;
}
else
{
/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL);
}
}
/**
* @}
*/
/**
* @brief Enables or disables the USART's DE functionality.
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param NewState: new state of the driver enable mode.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the DE functionality by setting the DEM bit in the CR3 register */
USARTx->CR3 |= USART_CR3_DEM;
}
else
{
/* Disable the DE functionality by clearing the DEM bit in the CR3 register */
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM);
}
}
/**
* @brief Configures the USART's DE polarity
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param USART_DEPolarity: specifies the DE polarity.
* This parameter can be one of the following values:
* @arg USART_DEPolarity_Low
* @arg USART_DEPolarity_High
* @retval None
*/
void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DE_POLARITY(USART_DEPolarity));
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP);
USARTx->CR3 |= USART_DEPolarity;
}
/**
* @brief Sets the specified RS485 DE assertion time
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param USART_DEAssertionTime: specifies the time between the activation of
* the DE signal and the beginning of the start bit
* @retval None
*/
void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime));
/* Clear the DE assertion time */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT);
/* Set the new value for the DE assertion time */
USARTx->CR1 |=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15);
}
/**
* @brief Sets the specified RS485 DE deassertion time
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param USART_DeassertionTime: specifies the time between the middle of the last
* stop bit in a transmitted message and the de-activation of the DE signal
* @retval None
*/
void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime));
/* Clear the DE deassertion time */
USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT);
/* Set the new value for the DE deassertion time */
USARTx->CR1 |=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10);
}
/**
* @}
*/
/**
* @brief Enables or disables the USART's DMA interface.
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param USART_DMAReq: specifies the DMA request.
* This parameter can be any combination of the following values:
* @arg USART_DMAReq_Tx: USART DMA transmit request
* @arg USART_DMAReq_Rx: USART DMA receive request
* @param NewState: new state of the DMA Request sources.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DMAREQ(USART_DMAReq));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the DMA transfer for selected requests by setting the DMAT and/or
DMAR bits in the USART CR3 register */
USARTx->CR3 |= USART_DMAReq;
}
else
{
/* Disable the DMA transfer for selected requests by clearing the DMAT and/or
DMAR bits in the USART CR3 register */
USARTx->CR3 &= (uint32_t)~USART_DMAReq;
}
}
/**
* @brief Enables or disables the USART's DMA interface when reception error occurs.
* @param USARTx: where x can be from 1 to 8 to select the USART peripheral.
* @param USART_DMAOnError: specifies the DMA status in case of reception error.
* This parameter can be any combination of the following values:
* @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA
* reception error is asserted.
* @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA
* reception error is asserted.
* @retval None
*/
void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DMAONERROR(USART_DMAOnError));
/* Clear the DMA Reception error detection bit */
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE);
/* Set the new value for the DMA Reception error detection bit */
USARTx->CR3 |= USART_DMAOnError;
}
/**
* @}
*/
/**
* @brief Enables or disables the specified USART interrupts.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
* This parameter can be one of the following values:
* @arg USART_IT_WU: Wake up interrupt
* @arg USART_IT_CM: Character match interrupt.
* @arg USART_IT_EOB: End of block interrupt
* @arg USART_IT_RTO: Receive time out interrupt.
* @arg USART_IT_CTS: CTS change interrupt.
* @arg USART_IT_LBD: LIN Break detection interrupt
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
* @arg USART_IT_TC: Transmission complete interrupt.
* @arg USART_IT_RXNE: Receive Data register not empty interrupt.
* @arg USART_IT_IDLE: Idle line detection interrupt.
* @arg USART_IT_PE: Parity Error interrupt.
* @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
* @param NewState: new state of the specified USARTx interrupts.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState)
{
uint32_t usartreg = 0, itpos = 0, itmask = 0;
uint32_t usartxbase = 0;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CONFIG_IT(USART_IT));
assert_param(IS_FUNCTIONAL_STATE(NewState));
usartxbase = (uint32_t)USARTx;
/* Get the USART register index */
usartreg = (((uint16_t)USART_IT) >> 0x08);
/* Get the interrupt position */
itpos = USART_IT & IT_MASK;
itmask = (((uint32_t)0x01) << itpos);
if (usartreg == 0x02) /* The IT is in CR2 register */
{
usartxbase += 0x04;
}
else if (usartreg == 0x03) /* The IT is in CR3 register */
{
usartxbase += 0x08;
}
else /* The IT is in CR1 register */
{
}
if (NewState != DISABLE)
{
*(__IO uint32_t*)usartxbase |= itmask;
}
else
{
*(__IO uint32_t*)usartxbase &= ~itmask;
}
}
/**
* @brief Enables the specified USART's Request.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_Request: specifies the USART request.
* This parameter can be any combination of the following values:
* @arg USART_Request_TXFRQ: Transmit data flush ReQuest
* @arg USART_Request_RXFRQ: Receive data flush ReQuest
* @arg USART_Request_MMRQ: Mute Mode ReQuest
* @arg USART_Request_SBKRQ: Send Break ReQuest
* @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest
* @param NewState: new state of the DMA interface when reception error occurs.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_REQUEST(USART_Request));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the USART ReQuest by setting the dedicated request bit in the RQR
register.*/
USARTx->RQR |= USART_Request;
}
else
{
/* Disable the USART ReQuest by clearing the dedicated request bit in the RQR
register.*/
USARTx->RQR &= (uint32_t)~USART_Request;
}
}
/**
* @brief Enables or disables the USART's Overrun detection.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_OVRDetection: specifies the OVR detection status in case of OVR error.
* This parameter can be any combination of the following values:
* @arg USART_OVRDetection_Enable: OVR error detection enabled when
* the USART OVR error is asserted.
* @arg USART_OVRDetection_Disable: OVR error detection disabled when
* the USART OVR error is asserted.
* @retval None
*/
void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_OVRDETECTION(USART_OVRDetection));
/* Clear the OVR detection bit */
USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS);
/* Set the new value for the OVR detection bit */
USARTx->CR3 |= USART_OVRDetection;
}
/**
* @brief Checks whether the specified USART flag is set or not.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral..
* @param USART_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* @arg USART_FLAG_REACK: Receive Enable acknowledge flag.
* @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag.
* @arg USART_FLAG_WU: Wake up flag
* @arg USART_FLAG_RWU: Receive Wake up flag
* @arg USART_FLAG_SBK: Send Break flag.
* @arg USART_FLAG_CM: Character match flag.
* @arg USART_FLAG_BUSY: Busy flag.
* @arg USART_FLAG_ABRF: Auto baud rate flag.
* @arg USART_FLAG_ABRE: Auto baud rate error flag.
* @arg USART_FLAG_EOB: End of block flag
* @arg USART_FLAG_RTO: Receive time out flag.
* @arg USART_FLAG_nCTSS: Inverted nCTS input bit status.
* @arg USART_FLAG_CTS: CTS Change flag.
* @arg USART_FLAG_LBD: LIN Break detection flag
* @arg USART_FLAG_TXE: Transmit data register empty flag.
* @arg USART_FLAG_TC: Transmission Complete flag.
* @arg USART_FLAG_RXNE: Receive data register not empty flag.
* @arg USART_FLAG_IDLE: Idle Line detection flag.
* @arg USART_FLAG_ORE: OverRun Error flag.
* @arg USART_FLAG_NE: Noise Error flag.
* @arg USART_FLAG_FE: Framing Error flag.
* @arg USART_FLAG_PE: Parity Error flag.
* @retval The new state of USART_FLAG (SET or RESET).
*/
FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_FLAG(USART_FLAG));
if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/**
* @brief Clears the USARTx's pending flags.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_FLAG: specifies the flag to clear.
* This parameter can be any combination of the following values:
* @arg USART_FLAG_WU: Wake up flag
* @arg USART_FLAG_CM: Character match flag.
* @arg USART_FLAG_EOB: End of block flag
* @arg USART_FLAG_RTO: Receive time out flag.
* @arg USART_FLAG_CTS: CTS Change flag.
* @arg USART_FLAG_LBD: LIN Break detection flag
* @arg USART_FLAG_TC: Transmission Complete flag.
* @arg USART_FLAG_IDLE: IDLE line detected flag.
* @arg USART_FLAG_ORE: OverRun Error flag.
* @arg USART_FLAG_NE: Noise Error flag.
* @arg USART_FLAG_FE: Framing Error flag.
* @arg USART_FLAG_PE: Parity Errorflag.
*
* @note RXNE pending bit is cleared by a read to the USART_RDR register
* (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register
* USART_RQR (USART_RequestCmd()).
* @note TC flag can be also cleared by software sequence: a read operation
* to USART_SR register (USART_GetFlagStatus()) followed by a write
* operation to USART_TDR register (USART_SendData()).
* @note TXE flag is cleared by a write to the USART_TDR register (USART_SendData())
* or by writing 1 to the TXFRQ in the register USART_RQR (USART_RequestCmd()).
* @note SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR
* (USART_RequestCmd()).
* @retval None
*/
void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
USARTx->ICR = USART_FLAG;
}
/**
* @brief Checks whether the specified USART interrupt has occurred or not.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_IT: specifies the USART interrupt source to check.
* This parameter can be one of the following values:
* @arg USART_IT_WU: Wake up interrupt
* @arg USART_IT_CM: Character match interrupt.
* @arg USART_IT_EOB: End of block interrupt
* @arg USART_IT_RTO: Receive time out interrupt.
* @arg USART_IT_CTS: CTS change interrupt.
* @arg USART_IT_LBD: LIN Break detection interrupt
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
* @arg USART_IT_TC: Transmission complete interrupt.
* @arg USART_IT_RXNE: Receive Data register not empty interrupt.
* @arg USART_IT_IDLE: Idle line detection interrupt.
* @arg USART_IT_ORE: OverRun Error interrupt.
* @arg USART_IT_NE: Noise Error interrupt.
* @arg USART_IT_FE: Framing Error interrupt.
* @arg USART_IT_PE: Parity Error interrupt.
* @retval The new state of USART_IT (SET or RESET).
*/
ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT)
{
uint32_t bitpos = 0, itmask = 0, usartreg = 0;
ITStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_GET_IT(USART_IT));
/* Get the USART register index */
usartreg = (((uint16_t)USART_IT) >> 0x08);
/* Get the interrupt position */
itmask = USART_IT & IT_MASK;
itmask = (uint32_t)0x01 << itmask;
if (usartreg == 0x01) /* The IT is in CR1 register */
{
itmask &= USARTx->CR1;
}
else if (usartreg == 0x02) /* The IT is in CR2 register */
{
itmask &= USARTx->CR2;
}
else /* The IT is in CR3 register */
{
itmask &= USARTx->CR3;
}
bitpos = USART_IT >> 0x10;
bitpos = (uint32_t)0x01 << bitpos;
bitpos &= USARTx->ISR;
if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/**
* @brief Clears the USARTx's interrupt pending bits.
* @param USARTx: where x can be from 1 to 2 to select the USART peripheral.
* @param USART_IT: specifies the interrupt pending bit to clear.
* This parameter can be one of the following values:
* @arg USART_IT_WU: Wake up interrupt
* @arg USART_IT_CM: Character match interrupt.
* @arg USART_IT_EOB: End of block interrupt
* @arg USART_IT_RTO: Receive time out interrupt.
* @arg USART_IT_CTS: CTS change interrupt.
* @arg USART_IT_LBD: LIN Break detection interrupt
* @arg USART_IT_TC: Transmission complete interrupt.
* @arg USART_IT_IDLE: IDLE line detected interrupt.
* @arg USART_IT_ORE: OverRun Error interrupt.
* @arg USART_IT_NE: Noise Error interrupt.
* @arg USART_IT_FE: Framing Error interrupt.
* @arg USART_IT_PE: Parity Error interrupt.
*
* @note RXNE pending bit is cleared by a read to the USART_RDR register
* (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register
* USART_RQR (USART_RequestCmd()).
* @note TC pending bit can be also cleared by software sequence: a read
* operation to USART_SR register (USART_GetITStatus()) followed by
* a write operation to USART_TDR register (USART_SendData()).
* @note TXE pending bit is cleared by a write to the USART_TDR register
* (USART_SendData()) or by writing 1 to the TXFRQ in the register
* USART_RQR (USART_RequestCmd()).
* @retval None
*/
void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT)
{
uint32_t bitpos = 0, itmask = 0;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_CLEAR_IT(USART_IT));
bitpos = USART_IT >> 0x10;
itmask = ((uint32_t)0x01 << (uint32_t)bitpos);
USARTx->ICR = (uint32_t)itmask;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT FMD *****END OF FILE****/
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