diff options
| author | bnewbold <bnewbold@robocracy.org> | 2010-03-31 08:52:45 +0800 |
|---|---|---|
| committer | iperry <iperry@gmail.com> | 2010-03-31 09:43:10 +0800 |
| commit | 1d3861ef93f8423176c6010ab606abdab00a7cbd (patch) | |
| tree | 5c95101e295bcfdd7f9f4292ce9204ddf7e7f662 /stm32lib/src/stm32f10x_usart.c | |
| parent | 8d6bf3b196c2a0bc1adda4a04669e54fdc5b65cb (diff) | |
| download | librambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.tar.gz librambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.zip | |
Major hierarchy reorganization; see README.
copy-to-ide and Makefile updated to conform; .gitignore added;
LICENSE added
Diffstat (limited to 'stm32lib/src/stm32f10x_usart.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_usart.c | 1001 |
1 files changed, 1001 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_usart.c b/stm32lib/src/stm32f10x_usart.c new file mode 100644 index 0000000..baf9c47 --- /dev/null +++ b/stm32lib/src/stm32f10x_usart.c @@ -0,0 +1,1001 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : stm32f10x_usart.c
+* Author : MCD Application Team
+* Version : V2.0.2
+* Date : 07/11/2008
+* Description : This file provides all the USART firmware functions.
+********************************************************************************
+* 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.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_usart.h"
+#include "stm32f10x_rcc.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* USART UE Mask */
+#define CR1_UE_Set ((u16)0x2000) /* USART Enable Mask */
+#define CR1_UE_Reset ((u16)0xDFFF) /* USART Disable Mask */
+
+/* USART WakeUp Method */
+#define CR1_WAKE_Mask ((u16)0xF7FF) /* USART WakeUp Method Mask */
+
+/* USART RWU Mask */
+#define CR1_RWU_Set ((u16)0x0002) /* USART mute mode Enable Mask */
+#define CR1_RWU_Reset ((u16)0xFFFD) /* USART mute mode Enable Mask */
+
+#define CR1_SBK_Set ((u16)0x0001) /* USART Break Character send Mask */
+
+#define CR1_CLEAR_Mask ((u16)0xE9F3) /* USART CR1 Mask */
+
+#define CR2_Address_Mask ((u16)0xFFF0) /* USART address Mask */
+
+/* USART LIN Mask */
+#define CR2_LINEN_Set ((u16)0x4000) /* USART LIN Enable Mask */
+#define CR2_LINEN_Reset ((u16)0xBFFF) /* USART LIN Disable Mask */
+
+/* USART LIN Break detection */
+#define CR2_LBDL_Mask ((u16)0xFFDF) /* USART LIN Break detection Mask */
+
+#define CR2_STOP_CLEAR_Mask ((u16)0xCFFF) /* USART CR2 STOP Bits Mask */
+#define CR2_CLOCK_CLEAR_Mask ((u16)0xF0FF) /* USART CR2 Clock Mask */
+
+/* USART SC Mask */
+#define CR3_SCEN_Set ((u16)0x0020) /* USART SC Enable Mask */
+#define CR3_SCEN_Reset ((u16)0xFFDF) /* USART SC Disable Mask */
+
+/* USART SC NACK Mask */
+#define CR3_NACK_Set ((u16)0x0010) /* USART SC NACK Enable Mask */
+#define CR3_NACK_Reset ((u16)0xFFEF) /* USART SC NACK Disable Mask */
+
+/* USART Half-Duplex Mask */
+#define CR3_HDSEL_Set ((u16)0x0008) /* USART Half-Duplex Enable Mask */
+#define CR3_HDSEL_Reset ((u16)0xFFF7) /* USART Half-Duplex Disable Mask */
+
+/* USART IrDA Mask */
+#define CR3_IRLP_Mask ((u16)0xFFFB) /* USART IrDA LowPower mode Mask */
+
+#define CR3_CLEAR_Mask ((u16)0xFCFF) /* USART CR3 Mask */
+
+/* USART IrDA Mask */
+#define CR3_IREN_Set ((u16)0x0002) /* USART IrDA Enable Mask */
+#define CR3_IREN_Reset ((u16)0xFFFD) /* USART IrDA Disable Mask */
+
+#define GTPR_LSB_Mask ((u16)0x00FF) /* Guard Time Register LSB Mask */
+#define GTPR_MSB_Mask ((u16)0xFF00) /* Guard Time Register MSB Mask */
+
+#define IT_Mask ((u16)0x001F) /* USART Interrupt Mask */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : USART_DeInit
+* Description : Deinitializes the USARTx peripheral registers to their
+* default reset values.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_DeInit(USART_TypeDef* USARTx)
+{
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+
+ switch (*(u32*)&USARTx)
+ {
+ case USART1_BASE:
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
+ break;
+
+ case USART2_BASE:
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
+ break;
+
+ case USART3_BASE:
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
+ break;
+
+ case UART4_BASE:
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
+ break;
+
+ case UART5_BASE:
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_Init
+* Description : Initializes the USARTx peripheral according to the specified
+* parameters in the USART_InitStruct .
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_InitStruct: pointer to a USART_InitTypeDef structure
+* that contains the configuration information for the
+* specified USART peripheral.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
+{
+ u32 tmpreg = 0x00, apbclock = 0x00;
+ u32 integerdivider = 0x00;
+ u32 fractionaldivider = 0x00;
+ u32 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 */
+ assert_param(IS_USART_PERIPH_HFC(USARTx, USART_InitStruct->USART_HardwareFlowControl));
+
+ usartxbase = (*(u32*)&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 |= (u32)USART_InitStruct->USART_StopBits;
+
+ /* Write to USART CR2 */
+ USARTx->CR2 = (u16)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 |= (u32)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
+ USART_InitStruct->USART_Mode;
+
+ /* Write to USART CR1 */
+ USARTx->CR1 = (u16)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 = (u16)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)) & ((u8)0x0F);
+
+ /* Write to USART BRR */
+ USARTx->BRR = (u16)tmpreg;
+}
+
+/*******************************************************************************
+* Function Name : USART_StructInit
+* Description : Fills each USART_InitStruct member with its default value.
+* Input : - USART_InitStruct: pointer to a USART_InitTypeDef structure
+* which will be initialized.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_ClockInit
+* Description : Initializes the USARTx peripheral Clock according to the
+* specified parameters in the USART_ClockInitStruct .
+* Input : - USARTx: where x can be 1, 2, 3 to select the USART peripheral.
+* Note: The Smart Card mode is not available for UART4 and UART5.
+* - USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
+* structure that contains the configuration information for
+* the specified USART peripheral.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
+{
+ u32 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 |= (u32)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL |
+ USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit;
+
+ /* Write to USART CR2 */
+ USARTx->CR2 = (u16)tmpreg;
+}
+
+/*******************************************************************************
+* Function Name : USART_ClockStructInit
+* Description : Fills each USART_ClockInitStruct member with its default value.
+* Input : - USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
+* structure which will be initialized.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_Cmd
+* Description : Enables or disables the specified USART peripheral.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* : - NewState: new state of the USARTx peripheral.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_ITConfig
+* Description : Enables or disables the specified USART interrupts.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_IT: specifies the USART interrupt sources to be
+* enabled or disabled.
+* This parameter can be one of the following values:
+* - USART_IT_CTS: CTS change interrupt (not available for
+* UART4 and UART5)
+* - USART_IT_LBD: LIN Break detection interrupt
+* - USART_IT_TXE: Tansmit Data Register empty interrupt
+* - USART_IT_TC: Transmission complete interrupt
+* - USART_IT_RXNE: Receive Data register not empty
+* interrupt
+* - USART_IT_IDLE: Idle line detection interrupt
+* - USART_IT_PE: Parity Error interrupt
+* - USART_IT_ERR: Error interrupt(Frame error, noise
+* error, overrun error)
+* - NewState: new state of the specified USARTx interrupts.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_ITConfig(USART_TypeDef* USARTx, u16 USART_IT, FunctionalState NewState)
+{
+ u32 usartreg = 0x00, itpos = 0x00, itmask = 0x00;
+ u32 usartxbase = 0x00;
+
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+ assert_param(IS_USART_CONFIG_IT(USART_IT));
+ assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ usartxbase = (*(u32*)&(USARTx));
+
+ /* Get the USART register index */
+ usartreg = (((u8)USART_IT) >> 0x05);
+
+ /* Get the interrupt position */
+ itpos = USART_IT & IT_Mask;
+
+ itmask = (((u32)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)
+ {
+ *(vu32*)usartxbase |= itmask;
+ }
+ else
+ {
+ *(vu32*)usartxbase &= ~itmask;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_DMACmd
+* Description : Enables or disables the USART’s DMA interface.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3 or UART4.
+* Note: The DMA mode is not available for UART5.
+* - USART_DMAReq: specifies the DMA request.
+* This parameter can be any combination of the following values:
+* - USART_DMAReq_Tx: USART DMA transmit request
+* - USART_DMAReq_Rx: USART DMA receive request
+* - NewState: new state of the DMA Request sources.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_DMACmd(USART_TypeDef* USARTx, u16 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 &= (u16)~USART_DMAReq;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_SetAddress
+* Description : Sets the address of the USART node.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_Address: Indicates the address of the USART node.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_SetAddress(USART_TypeDef* USARTx, u8 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_WakeUpConfig
+* Description : Selects the USART WakeUp method.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_WakeUp: specifies the USART wakeup method.
+* This parameter can be one of the following values:
+* - USART_WakeUp_IdleLine: WakeUp by an idle line detection
+* - USART_WakeUp_AddressMark: WakeUp by an address mark
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_WakeUpConfig(USART_TypeDef* USARTx, u16 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_ReceiverWakeUpCmd
+* Description : Determines if the USART is in mute mode or not.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - NewState: new state of the USART mute mode.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_LINBreakDetectLengthConfig
+* Description : Sets the USART LIN Break detection length.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_LINBreakDetectLength: specifies the LIN break
+* detection length.
+* This parameter can be one of the following values:
+* - USART_LINBreakDetectLength_10b: 10-bit break detection
+* - USART_LINBreakDetectLength_11b: 11-bit break detection
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, u16 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_LINCmd
+* Description : Enables or disables the USART’s LIN mode.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - NewState: new state of the USART LIN mode.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_SendData
+* Description : Transmits single data through the USARTx peripheral.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - Data: the data to transmit.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_SendData(USART_TypeDef* USARTx, u16 Data)
+{
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+ assert_param(IS_USART_DATA(Data));
+
+ /* Transmit Data */
+ USARTx->DR = (Data & (u16)0x01FF);
+}
+
+/*******************************************************************************
+* Function Name : USART_ReceiveData
+* Description : Returns the most recent received data by the USARTx peripheral.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* Output : None
+* Return : The received data.
+*******************************************************************************/
+u16 USART_ReceiveData(USART_TypeDef* USARTx)
+{
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+
+ /* Receive Data */
+ return (u16)(USARTx->DR & (u16)0x01FF);
+}
+
+/*******************************************************************************
+* Function Name : USART_SendBreak
+* Description : Transmits break characters.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_SetGuardTime
+* Description : Sets the specified USART guard time.
+* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
+* peripheral.
+* Note: The guard time bits are not available for UART4 and UART5.
+* - USART_GuardTime: specifies the guard time.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_SetGuardTime(USART_TypeDef* USARTx, u8 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 |= (u16)((u16)USART_GuardTime << 0x08);
+}
+
+/*******************************************************************************
+* Function Name : USART_SetPrescaler
+* Description : Sets the system clock prescaler.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* Note: The function is used for IrDA mode with UART4 and UART5.
+* - USART_Prescaler: specifies the prescaler clock.
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_SetPrescaler(USART_TypeDef* USARTx, u8 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_SmartCardCmd
+* Description : Enables or disables the USART’s Smart Card mode.
+* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
+* peripheral.
+* Note: The Smart Card mode is not available for UART4 and UART5.
+* - NewState: new state of the Smart Card mode.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_SmartCardNACKCmd
+* Description : Enables or disables NACK transmission.
+* Input : - USARTx: where x can be 1, 2 or 3 to select the USART
+* peripheral.
+* Note: The Smart Card mode is not available for UART4 and UART5.
+* - NewState: new state of the NACK transmission.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_HalfDuplexCmd
+* Description : Enables or disables the USART’s Half Duplex communication.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - NewState: new state of the USART Communication.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_IrDAConfig
+* Description : Configures the USART’s IrDA interface.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_IrDAMode: specifies the IrDA mode.
+* This parameter can be one of the following values:
+* - USART_IrDAMode_LowPower
+* - USART_IrDAMode_Normal
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_IrDAConfig(USART_TypeDef* USARTx, u16 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;
+}
+
+/*******************************************************************************
+* Function Name : USART_IrDACmd
+* Description : Enables or disables the USART’s IrDA interface.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - NewState: new state of the IrDA mode.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : USART_GetFlagStatus
+* Description : Checks whether the specified USART flag is set or not.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_FLAG: specifies the flag to check.
+* This parameter can be one of the following values:
+* - USART_FLAG_CTS: CTS Change flag (not available for
+* UART4 and UART5)
+* - USART_FLAG_LBD: LIN Break detection flag
+* - USART_FLAG_TXE: Transmit data register empty flag
+* - USART_FLAG_TC: Transmission Complete flag
+* - USART_FLAG_RXNE: Receive data register not empty flag
+* - USART_FLAG_IDLE: Idle Line detection flag
+* - USART_FLAG_ORE: OverRun Error flag
+* - USART_FLAG_NE: Noise Error flag
+* - USART_FLAG_FE: Framing Error flag
+* - USART_FLAG_PE: Parity Error flag
+* Output : None
+* Return : The new state of USART_FLAG (SET or RESET).
+*******************************************************************************/
+FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, u16 USART_FLAG)
+{
+ FlagStatus bitstatus = RESET;
+
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+ assert_param(IS_USART_FLAG(USART_FLAG));
+ assert_param(IS_USART_PERIPH_FLAG(USARTx, USART_FLAG)); /* The CTS flag is not available for UART4 and UART5 */
+
+ if ((USARTx->SR & USART_FLAG) != (u16)RESET)
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+ return bitstatus;
+}
+
+/*******************************************************************************
+* Function Name : USART_ClearFlag
+* Description : Clears the USARTx's pending flags.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_FLAG: specifies the flag to clear.
+* This parameter can be any combination of the following values:
+* - USART_FLAG_CTS: CTS Change flag (not available for
+* UART4 and UART5).
+* - USART_FLAG_LBD: LIN Break detection flag.
+* - USART_FLAG_TC: Transmission Complete flag.
+* - USART_FLAG_RXNE: Receive data register not empty flag.
+*
+* Notes:
+* - 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()).
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_ClearFlag(USART_TypeDef* USARTx, u16 USART_FLAG)
+{
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+ assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
+ assert_param(IS_USART_PERIPH_FLAG(USARTx, USART_FLAG)); /* The CTS flag is not available for UART4 and UART5 */
+
+ USARTx->SR = (u16)~USART_FLAG;
+}
+
+/*******************************************************************************
+* Function Name : USART_GetITStatus
+* Description : Checks whether the specified USART interrupt has occurred or not.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_IT: specifies the USART interrupt source to check.
+* This parameter can be one of the following values:
+* - USART_IT_CTS: CTS change interrupt (not available for
+* UART4 and UART5)
+* - USART_IT_LBD: LIN Break detection interrupt
+* - USART_IT_TXE: Tansmit Data Register empty interrupt
+* - USART_IT_TC: Transmission complete interrupt
+* - USART_IT_RXNE: Receive Data register not empty
+* interrupt
+* - USART_IT_IDLE: Idle line detection interrupt
+* - USART_IT_ORE: OverRun Error interrupt
+* - USART_IT_NE: Noise Error interrupt
+* - USART_IT_FE: Framing Error interrupt
+* - USART_IT_PE: Parity Error interrupt
+* Output : None
+* Return : The new state of USART_IT (SET or RESET).
+*******************************************************************************/
+ITStatus USART_GetITStatus(USART_TypeDef* USARTx, u16 USART_IT)
+{
+ u32 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));
+ assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
+
+ /* Get the USART register index */
+ usartreg = (((u8)USART_IT) >> 0x05);
+
+ /* Get the interrupt position */
+ itmask = USART_IT & IT_Mask;
+
+ itmask = (u32)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 = (u32)0x01 << bitpos;
+ bitpos &= USARTx->SR;
+
+ if ((itmask != (u16)RESET)&&(bitpos != (u16)RESET))
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+
+ return bitstatus;
+}
+
+/*******************************************************************************
+* Function Name : USART_ClearITPendingBit
+* Description : Clears the USARTx’s interrupt pending bits.
+* Input : - USARTx: Select the USART or the UART peripheral.
+* This parameter can be one of the following values:
+* - USART1, USART2, USART3, UART4 or UART5.
+* - USART_IT: specifies the interrupt pending bit to clear.
+* This parameter can be one of the following values:
+* - USART_IT_CTS: CTS change interrupt (not available for
+* UART4 and UART5)
+* - USART_IT_LBD: LIN Break detection interrupt
+* - USART_IT_TC: Transmission complete interrupt.
+* - USART_IT_RXNE: Receive Data register not empty interrupt.
+*
+* Notes:
+* - 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()).
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_ClearITPendingBit(USART_TypeDef* USARTx, u16 USART_IT)
+{
+ u16 bitpos = 0x00, itmask = 0x00;
+
+ /* Check the parameters */
+ assert_param(IS_USART_ALL_PERIPH(USARTx));
+ assert_param(IS_USART_CLEAR_IT(USART_IT));
+ assert_param(IS_USART_PERIPH_IT(USARTx, USART_IT)); /* The CTS interrupt is not available for UART4 and UART5 */
+
+ bitpos = USART_IT >> 0x08;
+
+ itmask = (u16)((u16)0x01 << bitpos);
+ USARTx->SR = (u16)~itmask;
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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