0,0 → 1,967 |
/** |
****************************************************************************** |
* @file stm32f10x_usart.c |
* @author MCD Application Team |
* @version V3.1.0 |
* @date 06/19/2009 |
* @brief This file provides all the USART firmware functions. |
****************************************************************************** |
* @copy |
* |
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
* |
* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2> |
*/ |
|
/* Includes ------------------------------------------------------------------*/ |
#include "stm32f10x_usart.h" |
#include "stm32f10x_rcc.h" |
|
/** @addtogroup STM32F10x_StdPeriph_Driver |
* @{ |
*/ |
|
/** @defgroup USART |
* @brief USART driver modules |
* @{ |
*/ |
|
/** @defgroup USART_Private_TypesDefinitions |
* @{ |
*/ |
|
/** |
* @} |
*/ |
|
/** @defgroup USART_Private_Defines |
* @{ |
*/ |
|
#define CR1_UE_Set ((uint16_t)0x2000) /*!< USART Enable Mask */ |
#define CR1_UE_Reset ((uint16_t)0xDFFF) /*!< USART Disable Mask */ |
|
#define CR1_WAKE_Mask ((uint16_t)0xF7FF) /*!< USART WakeUp Method Mask */ |
|
#define CR1_RWU_Set ((uint16_t)0x0002) /*!< USART mute mode Enable Mask */ |
#define CR1_RWU_Reset ((uint16_t)0xFFFD) /*!< USART mute mode Enable Mask */ |
#define CR1_SBK_Set ((uint16_t)0x0001) /*!< USART Break Character send Mask */ |
#define CR1_CLEAR_Mask ((uint16_t)0xE9F3) /*!< USART CR1 Mask */ |
#define CR2_Address_Mask ((uint16_t)0xFFF0) /*!< USART address Mask */ |
|
#define CR2_LINEN_Set ((uint16_t)0x4000) /*!< USART LIN Enable Mask */ |
#define CR2_LINEN_Reset ((uint16_t)0xBFFF) /*!< USART LIN Disable Mask */ |
|
#define CR2_LBDL_Mask ((uint16_t)0xFFDF) /*!< USART LIN Break detection Mask */ |
#define CR2_STOP_CLEAR_Mask ((uint16_t)0xCFFF) /*!< USART CR2 STOP Bits Mask */ |
#define CR2_CLOCK_CLEAR_Mask ((uint16_t)0xF0FF) /*!< USART CR2 Clock Mask */ |
|
#define CR3_SCEN_Set ((uint16_t)0x0020) /*!< USART SC Enable Mask */ |
#define CR3_SCEN_Reset ((uint16_t)0xFFDF) /*!< USART SC Disable Mask */ |
|
#define CR3_NACK_Set ((uint16_t)0x0010) /*!< USART SC NACK Enable Mask */ |
#define CR3_NACK_Reset ((uint16_t)0xFFEF) /*!< USART SC NACK Disable Mask */ |
|
#define CR3_HDSEL_Set ((uint16_t)0x0008) /*!< USART Half-Duplex Enable Mask */ |
#define CR3_HDSEL_Reset ((uint16_t)0xFFF7) /*!< USART Half-Duplex Disable Mask */ |
|
#define CR3_IRLP_Mask ((uint16_t)0xFFFB) /*!< USART IrDA LowPower mode Mask */ |
#define CR3_CLEAR_Mask ((uint16_t)0xFCFF) /*!< USART CR3 Mask */ |
|
#define CR3_IREN_Set ((uint16_t)0x0002) /*!< USART IrDA Enable Mask */ |
#define CR3_IREN_Reset ((uint16_t)0xFFFD) /*!< USART IrDA Disable Mask */ |
#define GTPR_LSB_Mask ((uint16_t)0x00FF) /*!< Guard Time Register LSB Mask */ |
#define GTPR_MSB_Mask ((uint16_t)0xFF00) /*!< Guard Time Register MSB Mask */ |
#define IT_Mask ((uint16_t)0x001F) /*!< USART Interrupt Mask */ |
|
/** |
* @} |
*/ |
|
/** @defgroup USART_Private_Macros |
* @{ |
*/ |
|
/** |
* @} |
*/ |
|
/** @defgroup USART_Private_Variables |
* @{ |
*/ |
|
/** |
* @} |
*/ |
|
/** @defgroup USART_Private_FunctionPrototypes |
* @{ |
*/ |
|
/** |
* @} |
*/ |
|
/** @defgroup USART_Private_Functions |
* @{ |
*/ |
|
/** |
* @brief Deinitializes the USARTx peripheral registers to their default reset values. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: USART1, USART2, USART3, UART4 or UART5. |
* @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); |
} |
else if (USARTx == USART3) |
{ |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE); |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE); |
} |
else if (USARTx == UART4) |
{ |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE); |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE); |
} |
else |
{ |
if (USARTx == UART5) |
{ |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE); |
RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE); |
} |
} |
} |
|
/** |
* @brief Initializes the USARTx peripheral according to the specified |
* parameters in the USART_InitStruct . |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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 tmpreg = 0x00, apbclock = 0x00; |
uint32_t integerdivider = 0x00; |
uint32_t fractionaldivider = 0x00; |
uint32_t usartxbase = 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)); |
/* The hardware flow control is available only for USART1, USART2 and USART3 */ |
if (USART_InitStruct->USART_HardwareFlowControl != USART_HardwareFlowControl_None) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
usartxbase = (uint32_t)USARTx; |
|
/*---------------------------- USART CR2 Configuration -----------------------*/ |
tmpreg = USARTx->CR2; |
/* Clear STOP[13:12] bits */ |
tmpreg &= CR2_STOP_CLEAR_Mask; |
/* 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 = (uint16_t)tmpreg; |
|
/*---------------------------- USART CR1 Configuration -----------------------*/ |
tmpreg = USARTx->CR1; |
/* Clear M, PCE, PS, TE and RE bits */ |
tmpreg &= 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 = (uint16_t)tmpreg; |
|
/*---------------------------- USART CR3 Configuration -----------------------*/ |
tmpreg = USARTx->CR3; |
/* Clear CTSE and RTSE bits */ |
tmpreg &= 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 = (uint16_t)tmpreg; |
|
/*---------------------------- USART BRR Configuration -----------------------*/ |
/* Configure the USART Baud Rate -------------------------------------------*/ |
RCC_GetClocksFreq(&RCC_ClocksStatus); |
if (usartxbase == USART1_BASE) |
{ |
apbclock = RCC_ClocksStatus.PCLK2_Frequency; |
} |
else |
{ |
apbclock = RCC_ClocksStatus.PCLK1_Frequency; |
} |
/* Determine the integer part */ |
integerdivider = ((0x19 * apbclock) / (0x04 * (USART_InitStruct->USART_BaudRate))); |
tmpreg = (integerdivider / 0x64) << 0x04; |
/* Determine the fractional part */ |
fractionaldivider = integerdivider - (0x64 * (tmpreg >> 0x04)); |
tmpreg |= ((((fractionaldivider * 0x10) + 0x32) / 0x64)) & ((uint8_t)0x0F); |
/* Write to USART BRR */ |
USARTx->BRR = (uint16_t)tmpreg; |
} |
|
/** |
* @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 1, 2, 3 to select the USART peripheral. |
* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef |
* structure that contains the configuration information for the specified |
* USART peripheral. |
* @note The Smart Card mode is not available for UART4 and UART5. |
* @retval None |
*/ |
void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct) |
{ |
uint32_t tmpreg = 0x00; |
/* Check the parameters */ |
assert_param(IS_USART_123_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 and LBCL bits */ |
tmpreg &= CR2_CLOCK_CLEAR_Mask; |
/* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/ |
/* 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 = (uint16_t)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: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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 |= CR1_UE_Set; |
} |
else |
{ |
/* Disable the selected USART by clearing the UE bit in the CR1 register */ |
USARTx->CR1 &= CR1_UE_Reset; |
} |
} |
|
/** |
* @brief Enables or disables the specified USART interrupts. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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_CTS: CTS change interrupt (not available for UART4 and UART5) |
* @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, uint16_t USART_IT, FunctionalState NewState) |
{ |
uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00; |
uint32_t usartxbase = 0x00; |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_CONFIG_IT(USART_IT)); |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
/* The CTS interrupt is not available for UART4 and UART5 */ |
if (USART_IT == USART_IT_CTS) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
usartxbase = (uint32_t)USARTx; |
|
/* Get the USART register index */ |
usartreg = (((uint8_t)USART_IT) >> 0x05); |
|
/* Get the interrupt position */ |
itpos = USART_IT & IT_Mask; |
itmask = (((uint32_t)0x01) << itpos); |
|
if (usartreg == 0x01) /* The IT is in CR1 register */ |
{ |
usartxbase += 0x0C; |
} |
else if (usartreg == 0x02) /* The IT is in CR2 register */ |
{ |
usartxbase += 0x10; |
} |
else /* The IT is in CR3 register */ |
{ |
usartxbase += 0x14; |
} |
if (NewState != DISABLE) |
{ |
*(__IO uint32_t*)usartxbase |= itmask; |
} |
else |
{ |
*(__IO uint32_t*)usartxbase &= ~itmask; |
} |
} |
|
/** |
* @brief Enables or disables the USARTs DMA interface. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3 or UART4. |
* @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. |
* @note The DMA mode is not available for UART5. |
* @retval None |
*/ |
void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_1234_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 &= (uint16_t)~USART_DMAReq; |
} |
} |
|
/** |
* @brief Sets the address of the USART node. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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)); |
assert_param(IS_USART_ADDRESS(USART_Address)); |
|
/* Clear the USART address */ |
USARTx->CR2 &= CR2_Address_Mask; |
/* Set the USART address node */ |
USARTx->CR2 |= USART_Address; |
} |
|
/** |
* @brief Selects the USART WakeUp method. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_WAKEUP(USART_WakeUp)); |
|
USARTx->CR1 &= CR1_WAKE_Mask; |
USARTx->CR1 |= USART_WakeUp; |
} |
|
/** |
* @brief Determines if the USART is in mute mode or not. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param NewState: new state of the USART mute mode. |
* This parameter can be: ENABLE or DISABLE. |
* @retval None |
*/ |
void USART_ReceiverWakeUpCmd(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 RWU bit in the CR1 register */ |
USARTx->CR1 |= CR1_RWU_Set; |
} |
else |
{ |
/* Disable the USART mute mode by clearing the RWU bit in the CR1 register */ |
USARTx->CR1 &= CR1_RWU_Reset; |
} |
} |
|
/** |
* @brief Sets the USART LIN Break detection length. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_LINBreakDetectLength: specifies the LIN break detection length. |
* This parameter can be one of the following values: |
* @arg USART_LINBreakDetectLength_10b: 10-bit break detection |
* @arg USART_LINBreakDetectLength_11b: 11-bit break detection |
* @retval None |
*/ |
void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength)); |
|
USARTx->CR2 &= CR2_LBDL_Mask; |
USARTx->CR2 |= USART_LINBreakDetectLength; |
} |
|
/** |
* @brief Enables or disables the USARTs LIN mode. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param NewState: new state of the USART LIN mode. |
* This parameter can be: ENABLE or DISABLE. |
* @retval None |
*/ |
void USART_LINCmd(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 LIN mode by setting the LINEN bit in the CR2 register */ |
USARTx->CR2 |= CR2_LINEN_Set; |
} |
else |
{ |
/* Disable the LIN mode by clearing the LINEN bit in the CR2 register */ |
USARTx->CR2 &= CR2_LINEN_Reset; |
} |
} |
|
/** |
* @brief Transmits single data through the USARTx peripheral. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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->DR = (Data & (uint16_t)0x01FF); |
} |
|
/** |
* @brief Returns the most recent received data by the USARTx peripheral. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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->DR & (uint16_t)0x01FF); |
} |
|
/** |
* @brief Transmits break characters. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @retval None |
*/ |
void USART_SendBreak(USART_TypeDef* USARTx) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
/* Send break characters */ |
USARTx->CR1 |= CR1_SBK_Set; |
} |
|
/** |
* @brief Sets the specified USART guard time. |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
* @param USART_GuardTime: specifies the guard time. |
* @note The guard time bits are not available for UART4 and UART5. |
* @retval None |
*/ |
void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
/* Clear the USART Guard time */ |
USARTx->GTPR &= GTPR_LSB_Mask; |
/* Set the USART guard time */ |
USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08); |
} |
|
/** |
* @brief Sets the system clock prescaler. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_Prescaler: specifies the prescaler clock. |
* @note The function is used for IrDA mode with UART4 and UART5. |
* @retval None |
*/ |
void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
/* Clear the USART prescaler */ |
USARTx->GTPR &= GTPR_MSB_Mask; |
/* Set the USART prescaler */ |
USARTx->GTPR |= USART_Prescaler; |
} |
|
/** |
* @brief Enables or disables the USARTs Smart Card mode. |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
* @param NewState: new state of the Smart Card mode. |
* This parameter can be: ENABLE or DISABLE. |
* @note The Smart Card mode is not available for UART4 and UART5. |
* @retval None |
*/ |
void USART_SmartCardCmd(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 SC mode by setting the SCEN bit in the CR3 register */ |
USARTx->CR3 |= CR3_SCEN_Set; |
} |
else |
{ |
/* Disable the SC mode by clearing the SCEN bit in the CR3 register */ |
USARTx->CR3 &= CR3_SCEN_Reset; |
} |
} |
|
/** |
* @brief Enables or disables NACK transmission. |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
* @param NewState: new state of the NACK transmission. |
* This parameter can be: ENABLE or DISABLE. |
* @note The Smart Card mode is not available for UART4 and UART5. |
* @retval None |
*/ |
void USART_SmartCardNACKCmd(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 NACK transmission by setting the NACK bit in the CR3 register */ |
USARTx->CR3 |= CR3_NACK_Set; |
} |
else |
{ |
/* Disable the NACK transmission by clearing the NACK bit in the CR3 register */ |
USARTx->CR3 &= CR3_NACK_Reset; |
} |
} |
|
/** |
* @brief Enables or disables the USARTs Half Duplex communication. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @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 |= CR3_HDSEL_Set; |
} |
else |
{ |
/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */ |
USARTx->CR3 &= CR3_HDSEL_Reset; |
} |
} |
|
/** |
* @brief Configures the USARTs IrDA interface. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_IrDAMode: specifies the IrDA mode. |
* This parameter can be one of the following values: |
* @arg USART_IrDAMode_LowPower |
* @arg USART_IrDAMode_Normal |
* @retval None |
*/ |
void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_IRDA_MODE(USART_IrDAMode)); |
|
USARTx->CR3 &= CR3_IRLP_Mask; |
USARTx->CR3 |= USART_IrDAMode; |
} |
|
/** |
* @brief Enables or disables the USARTs IrDA interface. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param NewState: new state of the IrDA mode. |
* This parameter can be: ENABLE or DISABLE. |
* @retval None |
*/ |
void USART_IrDACmd(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 IrDA mode by setting the IREN bit in the CR3 register */ |
USARTx->CR3 |= CR3_IREN_Set; |
} |
else |
{ |
/* Disable the IrDA mode by clearing the IREN bit in the CR3 register */ |
USARTx->CR3 &= CR3_IREN_Reset; |
} |
} |
|
/** |
* @brief Checks whether the specified USART flag is set or not. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_FLAG: specifies the flag to check. |
* This parameter can be one of the following values: |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5) |
* @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, uint16_t USART_FLAG) |
{ |
FlagStatus bitstatus = RESET; |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_FLAG(USART_FLAG)); |
/* The CTS flag is not available for UART4 and UART5 */ |
if (USART_FLAG == USART_FLAG_CTS) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET) |
{ |
bitstatus = SET; |
} |
else |
{ |
bitstatus = RESET; |
} |
return bitstatus; |
} |
|
/** |
* @brief Clears the USARTx's pending flags. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_FLAG: specifies the flag to clear. |
* This parameter can be any combination of the following values: |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5). |
* @arg USART_FLAG_LBD: LIN Break detection flag. |
* @arg USART_FLAG_TC: Transmission Complete flag. |
* @arg USART_FLAG_RXNE: Receive data register not empty flag. |
* |
* @note |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
* error) and IDLE (Idle line detected) flags are cleared by software |
* sequence: a read operation to USART_SR register (USART_GetFlagStatus()) |
* followed by a read operation to USART_DR register (USART_ReceiveData()). |
* - RXNE flag can be also cleared by a read to the USART_DR register |
* (USART_ReceiveData()). |
* - 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_DR register (USART_SendData()). |
* - TXE flag is cleared only by a write to the USART_DR register |
* (USART_SendData()). |
* @retval None |
*/ |
void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
{ |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_CLEAR_FLAG(USART_FLAG)); |
/* The CTS flag is not available for UART4 and UART5 */ |
if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
USARTx->SR = (uint16_t)~USART_FLAG; |
} |
|
/** |
* @brief Checks whether the specified USART interrupt has occurred or not. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_IT: specifies the USART interrupt source to check. |
* This parameter can be one of the following values: |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
* @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, uint16_t USART_IT) |
{ |
uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00; |
ITStatus bitstatus = RESET; |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_GET_IT(USART_IT)); |
/* The CTS interrupt is not available for UART4 and UART5 */ |
if (USART_IT == USART_IT_CTS) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
/* Get the USART register index */ |
usartreg = (((uint8_t)USART_IT) >> 0x05); |
/* 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 >> 0x08; |
bitpos = (uint32_t)0x01 << bitpos; |
bitpos &= USARTx->SR; |
if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET)) |
{ |
bitstatus = SET; |
} |
else |
{ |
bitstatus = RESET; |
} |
|
return bitstatus; |
} |
|
/** |
* @brief Clears the USARTxs interrupt pending bits. |
* @param USARTx: Select the USART or the UART peripheral. |
* This parameter can be one of the following values: |
* USART1, USART2, USART3, UART4 or UART5. |
* @param USART_IT: specifies the interrupt pending bit to clear. |
* This parameter can be one of the following values: |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
* @arg USART_IT_LBD: LIN Break detection interrupt |
* @arg USART_IT_TC: Transmission complete interrupt. |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt. |
* |
* @note |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
* error) and IDLE (Idle line detected) pending bits are cleared by |
* software sequence: a read operation to USART_SR register |
* (USART_GetITStatus()) followed by a read operation to USART_DR register |
* (USART_ReceiveData()). |
* - RXNE pending bit can be also cleared by a read to the USART_DR register |
* (USART_ReceiveData()). |
* - 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_DR register (USART_SendData()). |
* - TXE pending bit is cleared only by a write to the USART_DR register |
* (USART_SendData()). |
* @retval None |
*/ |
void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT) |
{ |
uint16_t bitpos = 0x00, itmask = 0x00; |
/* Check the parameters */ |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
assert_param(IS_USART_CLEAR_IT(USART_IT)); |
/* The CTS interrupt is not available for UART4 and UART5 */ |
if (USART_IT == USART_IT_CTS) |
{ |
assert_param(IS_USART_123_PERIPH(USARTx)); |
} |
|
bitpos = USART_IT >> 0x08; |
itmask = ((uint16_t)0x01 << (uint16_t)bitpos); |
USARTx->SR = (uint16_t)~itmask; |
} |
/** |
* @} |
*/ |
|
/** |
* @} |
*/ |
|
/** |
* @} |
*/ |
|
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ |