--- /dev/null
+/**\r
+ ******************************************************************************\r
+ * @file stm32f10x_usart.c\r
+ * @author MCD Application Team\r
+ * @version V3.3.0\r
+ * @date 04/16/2010\r
+ * @brief This file provides all the USART firmware functions.\r
+ ******************************************************************************\r
+ * @copy\r
+ *\r
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS\r
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE\r
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY\r
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING\r
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE\r
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.\r
+ *\r
+ * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>\r
+ */ \r
+\r
+/* Includes ------------------------------------------------------------------*/\r
+#include "stm32f10x_usart.h"\r
+#include "stm32f10x_rcc.h"\r
+\r
+/** @addtogroup STM32F10x_StdPeriph_Driver\r
+ * @{\r
+ */\r
+\r
+/** @defgroup USART \r
+ * @brief USART driver modules\r
+ * @{\r
+ */\r
+\r
+/** @defgroup USART_Private_TypesDefinitions\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup USART_Private_Defines\r
+ * @{\r
+ */\r
+\r
+#define CR1_UE_Set ((uint16_t)0x2000) /*!< USART Enable Mask */\r
+#define CR1_UE_Reset ((uint16_t)0xDFFF) /*!< USART Disable Mask */\r
+\r
+#define CR1_WAKE_Mask ((uint16_t)0xF7FF) /*!< USART WakeUp Method Mask */\r
+\r
+#define CR1_RWU_Set ((uint16_t)0x0002) /*!< USART mute mode Enable Mask */\r
+#define CR1_RWU_Reset ((uint16_t)0xFFFD) /*!< USART mute mode Enable Mask */\r
+#define CR1_SBK_Set ((uint16_t)0x0001) /*!< USART Break Character send Mask */\r
+#define CR1_CLEAR_Mask ((uint16_t)0xE9F3) /*!< USART CR1 Mask */\r
+#define CR2_Address_Mask ((uint16_t)0xFFF0) /*!< USART address Mask */\r
+\r
+#define CR2_LINEN_Set ((uint16_t)0x4000) /*!< USART LIN Enable Mask */\r
+#define CR2_LINEN_Reset ((uint16_t)0xBFFF) /*!< USART LIN Disable Mask */\r
+\r
+#define CR2_LBDL_Mask ((uint16_t)0xFFDF) /*!< USART LIN Break detection Mask */\r
+#define CR2_STOP_CLEAR_Mask ((uint16_t)0xCFFF) /*!< USART CR2 STOP Bits Mask */\r
+#define CR2_CLOCK_CLEAR_Mask ((uint16_t)0xF0FF) /*!< USART CR2 Clock Mask */\r
+\r
+#define CR3_SCEN_Set ((uint16_t)0x0020) /*!< USART SC Enable Mask */\r
+#define CR3_SCEN_Reset ((uint16_t)0xFFDF) /*!< USART SC Disable Mask */\r
+\r
+#define CR3_NACK_Set ((uint16_t)0x0010) /*!< USART SC NACK Enable Mask */\r
+#define CR3_NACK_Reset ((uint16_t)0xFFEF) /*!< USART SC NACK Disable Mask */\r
+\r
+#define CR3_HDSEL_Set ((uint16_t)0x0008) /*!< USART Half-Duplex Enable Mask */\r
+#define CR3_HDSEL_Reset ((uint16_t)0xFFF7) /*!< USART Half-Duplex Disable Mask */\r
+\r
+#define CR3_IRLP_Mask ((uint16_t)0xFFFB) /*!< USART IrDA LowPower mode Mask */\r
+#define CR3_CLEAR_Mask ((uint16_t)0xFCFF) /*!< USART CR3 Mask */\r
+\r
+#define CR3_IREN_Set ((uint16_t)0x0002) /*!< USART IrDA Enable Mask */\r
+#define CR3_IREN_Reset ((uint16_t)0xFFFD) /*!< USART IrDA Disable Mask */\r
+#define GTPR_LSB_Mask ((uint16_t)0x00FF) /*!< Guard Time Register LSB Mask */\r
+#define GTPR_MSB_Mask ((uint16_t)0xFF00) /*!< Guard Time Register MSB Mask */\r
+#define IT_Mask ((uint16_t)0x001F) /*!< USART Interrupt Mask */\r
+\r
+/* USART OverSampling-8 Mask */\r
+#define CR1_OVER8_Set ((u16)0x8000) /* USART OVER8 mode Enable Mask */\r
+#define CR1_OVER8_Reset ((u16)0x7FFF) /* USART OVER8 mode Disable Mask */\r
+\r
+/* USART One Bit Sampling Mask */\r
+#define CR3_ONEBITE_Set ((u16)0x0800) /* USART ONEBITE mode Enable Mask */\r
+#define CR3_ONEBITE_Reset ((u16)0xF7FF) /* USART ONEBITE mode Disable Mask */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup USART_Private_Macros\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup USART_Private_Variables\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup USART_Private_FunctionPrototypes\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup USART_Private_Functions\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @brief Deinitializes the USARTx peripheral registers to their default reset values.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values: USART1, USART2, USART3, UART4 or UART5.\r
+ * @retval None\r
+ */\r
+void USART_DeInit(USART_TypeDef* USARTx)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+\r
+ if (USARTx == USART1)\r
+ {\r
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);\r
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);\r
+ }\r
+ else if (USARTx == USART2)\r
+ {\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);\r
+ }\r
+ else if (USARTx == USART3)\r
+ {\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);\r
+ } \r
+ else if (USARTx == UART4)\r
+ {\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);\r
+ } \r
+ else\r
+ {\r
+ if (USARTx == UART5)\r
+ { \r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);\r
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);\r
+ }\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Initializes the USARTx peripheral according to the specified\r
+ * parameters in the USART_InitStruct .\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_InitStruct: pointer to a USART_InitTypeDef structure\r
+ * that contains the configuration information for the specified USART peripheral.\r
+ * @retval None\r
+ */\r
+void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)\r
+{\r
+ uint32_t tmpreg = 0x00, apbclock = 0x00;\r
+ uint32_t integerdivider = 0x00;\r
+ uint32_t fractionaldivider = 0x00;\r
+ uint32_t usartxbase = 0;\r
+ RCC_ClocksTypeDef RCC_ClocksStatus;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate)); \r
+ assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));\r
+ assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));\r
+ assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));\r
+ assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));\r
+ assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));\r
+ /* The hardware flow control is available only for USART1, USART2 and USART3 */\r
+ if (USART_InitStruct->USART_HardwareFlowControl != USART_HardwareFlowControl_None)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ }\r
+\r
+ usartxbase = (uint32_t)USARTx;\r
+\r
+/*---------------------------- USART CR2 Configuration -----------------------*/\r
+ tmpreg = USARTx->CR2;\r
+ /* Clear STOP[13:12] bits */\r
+ tmpreg &= CR2_STOP_CLEAR_Mask;\r
+ /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/\r
+ /* Set STOP[13:12] bits according to USART_StopBits value */\r
+ tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;\r
+ \r
+ /* Write to USART CR2 */\r
+ USARTx->CR2 = (uint16_t)tmpreg;\r
+\r
+/*---------------------------- USART CR1 Configuration -----------------------*/\r
+ tmpreg = USARTx->CR1;\r
+ /* Clear M, PCE, PS, TE and RE bits */\r
+ tmpreg &= CR1_CLEAR_Mask;\r
+ /* Configure the USART Word Length, Parity and mode ----------------------- */\r
+ /* Set the M bits according to USART_WordLength value */\r
+ /* Set PCE and PS bits according to USART_Parity value */\r
+ /* Set TE and RE bits according to USART_Mode value */\r
+ tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |\r
+ USART_InitStruct->USART_Mode;\r
+ /* Write to USART CR1 */\r
+ USARTx->CR1 = (uint16_t)tmpreg;\r
+\r
+/*---------------------------- USART CR3 Configuration -----------------------*/ \r
+ tmpreg = USARTx->CR3;\r
+ /* Clear CTSE and RTSE bits */\r
+ tmpreg &= CR3_CLEAR_Mask;\r
+ /* Configure the USART HFC -------------------------------------------------*/\r
+ /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */\r
+ tmpreg |= USART_InitStruct->USART_HardwareFlowControl;\r
+ /* Write to USART CR3 */\r
+ USARTx->CR3 = (uint16_t)tmpreg;\r
+\r
+/*---------------------------- USART BRR Configuration -----------------------*/\r
+ /* Configure the USART Baud Rate -------------------------------------------*/\r
+ RCC_GetClocksFreq(&RCC_ClocksStatus);\r
+ if (usartxbase == USART1_BASE)\r
+ {\r
+ apbclock = RCC_ClocksStatus.PCLK2_Frequency;\r
+ }\r
+ else\r
+ {\r
+ apbclock = RCC_ClocksStatus.PCLK1_Frequency;\r
+ }\r
+ \r
+ /* Determine the integer part */\r
+ if ((USARTx->CR1 & CR1_OVER8_Set) != 0)\r
+ {\r
+ /* Integer part computing in case Oversampling mode is 8 Samples */\r
+ integerdivider = ((25 * apbclock) / (2 * (USART_InitStruct->USART_BaudRate))); \r
+ }\r
+ else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */\r
+ {\r
+ /* Integer part computing in case Oversampling mode is 16 Samples */\r
+ integerdivider = ((25 * apbclock) / (4 * (USART_InitStruct->USART_BaudRate))); \r
+ }\r
+ tmpreg = (integerdivider / 100) << 4;\r
+\r
+ /* Determine the fractional part */\r
+ fractionaldivider = integerdivider - (100 * (tmpreg >> 4));\r
+\r
+ /* Implement the fractional part in the register */\r
+ if ((USARTx->CR1 & CR1_OVER8_Set) != 0)\r
+ {\r
+ tmpreg |= ((((fractionaldivider * 8) + 50) / 100)) & ((uint8_t)0x07);\r
+ }\r
+ else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */\r
+ {\r
+ tmpreg |= ((((fractionaldivider * 16) + 50) / 100)) & ((uint8_t)0x0F);\r
+ }\r
+ \r
+ /* Write to USART BRR */\r
+ USARTx->BRR = (uint16_t)tmpreg;\r
+}\r
+\r
+/**\r
+ * @brief Fills each USART_InitStruct member with its default value.\r
+ * @param USART_InitStruct: pointer to a USART_InitTypeDef structure\r
+ * which will be initialized.\r
+ * @retval None\r
+ */\r
+void USART_StructInit(USART_InitTypeDef* USART_InitStruct)\r
+{\r
+ /* USART_InitStruct members default value */\r
+ USART_InitStruct->USART_BaudRate = 9600;\r
+ USART_InitStruct->USART_WordLength = USART_WordLength_8b;\r
+ USART_InitStruct->USART_StopBits = USART_StopBits_1;\r
+ USART_InitStruct->USART_Parity = USART_Parity_No ;\r
+ USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;\r
+ USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None; \r
+}\r
+\r
+/**\r
+ * @brief Initializes the USARTx peripheral Clock according to the \r
+ * specified parameters in the USART_ClockInitStruct .\r
+ * @param USARTx: where x can be 1, 2, 3 to select the USART peripheral.\r
+ * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef\r
+ * structure that contains the configuration information for the specified \r
+ * USART peripheral. \r
+ * @note The Smart Card mode is not available for UART4 and UART5.\r
+ * @retval None\r
+ */\r
+void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)\r
+{\r
+ uint32_t tmpreg = 0x00;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));\r
+ assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));\r
+ assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));\r
+ assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));\r
+ \r
+/*---------------------------- USART CR2 Configuration -----------------------*/\r
+ tmpreg = USARTx->CR2;\r
+ /* Clear CLKEN, CPOL, CPHA and LBCL bits */\r
+ tmpreg &= CR2_CLOCK_CLEAR_Mask;\r
+ /* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/\r
+ /* Set CLKEN bit according to USART_Clock value */\r
+ /* Set CPOL bit according to USART_CPOL value */\r
+ /* Set CPHA bit according to USART_CPHA value */\r
+ /* Set LBCL bit according to USART_LastBit value */\r
+ tmpreg |= (uint32_t)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL | \r
+ USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit;\r
+ /* Write to USART CR2 */\r
+ USARTx->CR2 = (uint16_t)tmpreg;\r
+}\r
+\r
+/**\r
+ * @brief Fills each USART_ClockInitStruct member with its default value.\r
+ * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef\r
+ * structure which will be initialized.\r
+ * @retval None\r
+ */\r
+void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)\r
+{\r
+ /* USART_ClockInitStruct members default value */\r
+ USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;\r
+ USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;\r
+ USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;\r
+ USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the specified USART peripheral.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USARTx peripheral.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the selected USART by setting the UE bit in the CR1 register */\r
+ USARTx->CR1 |= CR1_UE_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the selected USART by clearing the UE bit in the CR1 register */\r
+ USARTx->CR1 &= CR1_UE_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the specified USART interrupts.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)\r
+ * @arg USART_IT_LBD: LIN Break detection interrupt\r
+ * @arg USART_IT_TXE: Tansmit Data Register empty interrupt\r
+ * @arg USART_IT_TC: Transmission complete interrupt\r
+ * @arg USART_IT_RXNE: Receive Data register not empty interrupt\r
+ * @arg USART_IT_IDLE: Idle line detection interrupt\r
+ * @arg USART_IT_PE: Parity Error interrupt\r
+ * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)\r
+ * @param NewState: new state of the specified USARTx interrupts.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState)\r
+{\r
+ uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00;\r
+ uint32_t usartxbase = 0x00;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_CONFIG_IT(USART_IT));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ /* The CTS interrupt is not available for UART4 and UART5 */\r
+ if (USART_IT == USART_IT_CTS)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ } \r
+ \r
+ usartxbase = (uint32_t)USARTx;\r
+\r
+ /* Get the USART register index */\r
+ usartreg = (((uint8_t)USART_IT) >> 0x05);\r
+\r
+ /* Get the interrupt position */\r
+ itpos = USART_IT & IT_Mask;\r
+ itmask = (((uint32_t)0x01) << itpos);\r
+ \r
+ if (usartreg == 0x01) /* The IT is in CR1 register */\r
+ {\r
+ usartxbase += 0x0C;\r
+ }\r
+ else if (usartreg == 0x02) /* The IT is in CR2 register */\r
+ {\r
+ usartxbase += 0x10;\r
+ }\r
+ else /* The IT is in CR3 register */\r
+ {\r
+ usartxbase += 0x14; \r
+ }\r
+ if (NewState != DISABLE)\r
+ {\r
+ *(__IO uint32_t*)usartxbase |= itmask;\r
+ }\r
+ else\r
+ {\r
+ *(__IO uint32_t*)usartxbase &= ~itmask;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART\92s DMA interface.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3 or UART4. \r
+ * @param USART_DMAReq: specifies the DMA request.\r
+ * This parameter can be any combination of the following values:\r
+ * @arg USART_DMAReq_Tx: USART DMA transmit request\r
+ * @arg USART_DMAReq_Rx: USART DMA receive request\r
+ * @param NewState: new state of the DMA Request sources.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @note The DMA mode is not available for UART5. \r
+ * @retval None\r
+ */\r
+void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_1234_PERIPH(USARTx));\r
+ assert_param(IS_USART_DMAREQ(USART_DMAReq)); \r
+ assert_param(IS_FUNCTIONAL_STATE(NewState)); \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the DMA transfer for selected requests by setting the DMAT and/or\r
+ DMAR bits in the USART CR3 register */\r
+ USARTx->CR3 |= USART_DMAReq;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the DMA transfer for selected requests by clearing the DMAT and/or\r
+ DMAR bits in the USART CR3 register */\r
+ USARTx->CR3 &= (uint16_t)~USART_DMAReq;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Sets the address of the USART node.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_Address: Indicates the address of the USART node.\r
+ * @retval None\r
+ */\r
+void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_ADDRESS(USART_Address)); \r
+ \r
+ /* Clear the USART address */\r
+ USARTx->CR2 &= CR2_Address_Mask;\r
+ /* Set the USART address node */\r
+ USARTx->CR2 |= USART_Address;\r
+}\r
+\r
+/**\r
+ * @brief Selects the USART WakeUp method.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_WakeUp: specifies the USART wakeup method.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection\r
+ * @arg USART_WakeUp_AddressMark: WakeUp by an address mark\r
+ * @retval None\r
+ */\r
+void USART_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_WAKEUP(USART_WakeUp));\r
+ \r
+ USARTx->CR1 &= CR1_WAKE_Mask;\r
+ USARTx->CR1 |= USART_WakeUp;\r
+}\r
+\r
+/**\r
+ * @brief Determines if the USART is in mute mode or not.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USART mute mode.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState)); \r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the USART mute mode by setting the RWU bit in the CR1 register */\r
+ USARTx->CR1 |= CR1_RWU_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the USART mute mode by clearing the RWU bit in the CR1 register */\r
+ USARTx->CR1 &= CR1_RWU_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Sets the USART LIN Break detection length.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_LINBreakDetectLength: specifies the LIN break detection length.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_LINBreakDetectLength_10b: 10-bit break detection\r
+ * @arg USART_LINBreakDetectLength_11b: 11-bit break detection\r
+ * @retval None\r
+ */\r
+void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));\r
+ \r
+ USARTx->CR2 &= CR2_LBDL_Mask;\r
+ USARTx->CR2 |= USART_LINBreakDetectLength; \r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART\92s LIN mode.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USART LIN mode.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the LIN mode by setting the LINEN bit in the CR2 register */\r
+ USARTx->CR2 |= CR2_LINEN_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */\r
+ USARTx->CR2 &= CR2_LINEN_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Transmits single data through the USARTx peripheral.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param Data: the data to transmit.\r
+ * @retval None\r
+ */\r
+void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_DATA(Data)); \r
+ \r
+ /* Transmit Data */\r
+ USARTx->DR = (Data & (uint16_t)0x01FF);\r
+}\r
+\r
+/**\r
+ * @brief Returns the most recent received data by the USARTx peripheral.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @retval The received data.\r
+ */\r
+uint16_t USART_ReceiveData(USART_TypeDef* USARTx)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ \r
+ /* Receive Data */\r
+ return (uint16_t)(USARTx->DR & (uint16_t)0x01FF);\r
+}\r
+\r
+/**\r
+ * @brief Transmits break characters.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @retval None\r
+ */\r
+void USART_SendBreak(USART_TypeDef* USARTx)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ \r
+ /* Send break characters */\r
+ USARTx->CR1 |= CR1_SBK_Set;\r
+}\r
+\r
+/**\r
+ * @brief Sets the specified USART guard time.\r
+ * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.\r
+ * @param USART_GuardTime: specifies the guard time.\r
+ * @note The guard time bits are not available for UART4 and UART5. \r
+ * @retval None\r
+ */\r
+void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)\r
+{ \r
+ /* Check the parameters */\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ \r
+ /* Clear the USART Guard time */\r
+ USARTx->GTPR &= GTPR_LSB_Mask;\r
+ /* Set the USART guard time */\r
+ USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);\r
+}\r
+\r
+/**\r
+ * @brief Sets the system clock prescaler.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_Prescaler: specifies the prescaler clock. \r
+ * @note The function is used for IrDA mode with UART4 and UART5.\r
+ * @retval None\r
+ */\r
+void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)\r
+{ \r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ \r
+ /* Clear the USART prescaler */\r
+ USARTx->GTPR &= GTPR_MSB_Mask;\r
+ /* Set the USART prescaler */\r
+ USARTx->GTPR |= USART_Prescaler;\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART\92s Smart Card mode.\r
+ * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.\r
+ * @param NewState: new state of the Smart Card mode.\r
+ * This parameter can be: ENABLE or DISABLE. \r
+ * @note The Smart Card mode is not available for UART4 and UART5. \r
+ * @retval None\r
+ */\r
+void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the SC mode by setting the SCEN bit in the CR3 register */\r
+ USARTx->CR3 |= CR3_SCEN_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the SC mode by clearing the SCEN bit in the CR3 register */\r
+ USARTx->CR3 &= CR3_SCEN_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables NACK transmission.\r
+ * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. \r
+ * @param NewState: new state of the NACK transmission.\r
+ * This parameter can be: ENABLE or DISABLE. \r
+ * @note The Smart Card mode is not available for UART4 and UART5.\r
+ * @retval None\r
+ */\r
+void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_123_PERIPH(USARTx)); \r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the NACK transmission by setting the NACK bit in the CR3 register */\r
+ USARTx->CR3 |= CR3_NACK_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */\r
+ USARTx->CR3 &= CR3_NACK_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART\92s Half Duplex communication.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USART Communication.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */\r
+ USARTx->CR3 |= CR3_HDSEL_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */\r
+ USARTx->CR3 &= CR3_HDSEL_Reset;\r
+ }\r
+}\r
+\r
+\r
+/**\r
+ * @brief Enables or disables the USART's 8x oversampling mode.\r
+ * @param USARTx: Select the USART or the UART peripheral.\r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USART one bit sampling methode.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @note\r
+ * This function has to be called before calling USART_Init()\r
+ * function in order to have correct baudrate Divider value. \r
+ * @retval None\r
+ */\r
+void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */\r
+ USARTx->CR1 |= CR1_OVER8_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */\r
+ USARTx->CR1 &= CR1_OVER8_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART's one bit sampling methode.\r
+ * @param USARTx: Select the USART or the UART peripheral.\r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the USART one bit sampling methode.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the one bit method by setting the ONEBITE bit in the CR3 register */\r
+ USARTx->CR3 |= CR3_ONEBITE_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable tthe one bit method by clearing the ONEBITE bit in the CR3 register */\r
+ USARTx->CR3 &= CR3_ONEBITE_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Configures the USART\92s IrDA interface.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_IrDAMode: specifies the IrDA mode.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_IrDAMode_LowPower\r
+ * @arg USART_IrDAMode_Normal\r
+ * @retval None\r
+ */\r
+void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));\r
+ \r
+ USARTx->CR3 &= CR3_IRLP_Mask;\r
+ USARTx->CR3 |= USART_IrDAMode;\r
+}\r
+\r
+/**\r
+ * @brief Enables or disables the USART\92s IrDA interface.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param NewState: new state of the IrDA mode.\r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState));\r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ /* Enable the IrDA mode by setting the IREN bit in the CR3 register */\r
+ USARTx->CR3 |= CR3_IREN_Set;\r
+ }\r
+ else\r
+ {\r
+ /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */\r
+ USARTx->CR3 &= CR3_IREN_Reset;\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Checks whether the specified USART flag is set or not.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_FLAG: specifies the flag to check.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5)\r
+ * @arg USART_FLAG_LBD: LIN Break detection flag\r
+ * @arg USART_FLAG_TXE: Transmit data register empty flag\r
+ * @arg USART_FLAG_TC: Transmission Complete flag\r
+ * @arg USART_FLAG_RXNE: Receive data register not empty flag\r
+ * @arg USART_FLAG_IDLE: Idle Line detection flag\r
+ * @arg USART_FLAG_ORE: OverRun Error flag\r
+ * @arg USART_FLAG_NE: Noise Error flag\r
+ * @arg USART_FLAG_FE: Framing Error flag\r
+ * @arg USART_FLAG_PE: Parity Error flag\r
+ * @retval The new state of USART_FLAG (SET or RESET).\r
+ */\r
+FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG)\r
+{\r
+ FlagStatus bitstatus = RESET;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_FLAG(USART_FLAG));\r
+ /* The CTS flag is not available for UART4 and UART5 */\r
+ if (USART_FLAG == USART_FLAG_CTS)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ } \r
+ \r
+ if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET)\r
+ {\r
+ bitstatus = SET;\r
+ }\r
+ else\r
+ {\r
+ bitstatus = RESET;\r
+ }\r
+ return bitstatus;\r
+}\r
+\r
+/**\r
+ * @brief Clears the USARTx's pending flags.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_FLAG: specifies the flag to clear.\r
+ * This parameter can be any combination of the following values:\r
+ * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5).\r
+ * @arg USART_FLAG_LBD: LIN Break detection flag.\r
+ * @arg USART_FLAG_TC: Transmission Complete flag.\r
+ * @arg USART_FLAG_RXNE: Receive data register not empty flag.\r
+ * \r
+ * @note\r
+ * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun \r
+ * error) and IDLE (Idle line detected) flags are cleared by software \r
+ * sequence: a read operation to USART_SR register (USART_GetFlagStatus()) \r
+ * followed by a read operation to USART_DR register (USART_ReceiveData()).\r
+ * - RXNE flag can be also cleared by a read to the USART_DR register \r
+ * (USART_ReceiveData()).\r
+ * - TC flag can be also cleared by software sequence: a read operation to \r
+ * USART_SR register (USART_GetFlagStatus()) followed by a write operation\r
+ * to USART_DR register (USART_SendData()).\r
+ * - TXE flag is cleared only by a write to the USART_DR register \r
+ * (USART_SendData()).\r
+ * @retval None\r
+ */\r
+void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));\r
+ /* The CTS flag is not available for UART4 and UART5 */\r
+ if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ } \r
+ \r
+ USARTx->SR = (uint16_t)~USART_FLAG;\r
+}\r
+\r
+/**\r
+ * @brief Checks whether the specified USART interrupt has occurred or not.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_IT: specifies the USART interrupt source to check.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)\r
+ * @arg USART_IT_LBD: LIN Break detection interrupt\r
+ * @arg USART_IT_TXE: Tansmit Data Register empty interrupt\r
+ * @arg USART_IT_TC: Transmission complete interrupt\r
+ * @arg USART_IT_RXNE: Receive Data register not empty interrupt\r
+ * @arg USART_IT_IDLE: Idle line detection interrupt\r
+ * @arg USART_IT_ORE: OverRun Error interrupt\r
+ * @arg USART_IT_NE: Noise Error interrupt\r
+ * @arg USART_IT_FE: Framing Error interrupt\r
+ * @arg USART_IT_PE: Parity Error interrupt\r
+ * @retval The new state of USART_IT (SET or RESET).\r
+ */\r
+ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT)\r
+{\r
+ uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00;\r
+ ITStatus bitstatus = RESET;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_GET_IT(USART_IT));\r
+ /* The CTS interrupt is not available for UART4 and UART5 */ \r
+ if (USART_IT == USART_IT_CTS)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ } \r
+ \r
+ /* Get the USART register index */\r
+ usartreg = (((uint8_t)USART_IT) >> 0x05);\r
+ /* Get the interrupt position */\r
+ itmask = USART_IT & IT_Mask;\r
+ itmask = (uint32_t)0x01 << itmask;\r
+ \r
+ if (usartreg == 0x01) /* The IT is in CR1 register */\r
+ {\r
+ itmask &= USARTx->CR1;\r
+ }\r
+ else if (usartreg == 0x02) /* The IT is in CR2 register */\r
+ {\r
+ itmask &= USARTx->CR2;\r
+ }\r
+ else /* The IT is in CR3 register */\r
+ {\r
+ itmask &= USARTx->CR3;\r
+ }\r
+ \r
+ bitpos = USART_IT >> 0x08;\r
+ bitpos = (uint32_t)0x01 << bitpos;\r
+ bitpos &= USARTx->SR;\r
+ if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))\r
+ {\r
+ bitstatus = SET;\r
+ }\r
+ else\r
+ {\r
+ bitstatus = RESET;\r
+ }\r
+ \r
+ return bitstatus; \r
+}\r
+\r
+/**\r
+ * @brief Clears the USARTx\92s interrupt pending bits.\r
+ * @param USARTx: Select the USART or the UART peripheral. \r
+ * This parameter can be one of the following values:\r
+ * USART1, USART2, USART3, UART4 or UART5.\r
+ * @param USART_IT: specifies the interrupt pending bit to clear.\r
+ * This parameter can be one of the following values:\r
+ * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)\r
+ * @arg USART_IT_LBD: LIN Break detection interrupt\r
+ * @arg USART_IT_TC: Transmission complete interrupt. \r
+ * @arg USART_IT_RXNE: Receive Data register not empty interrupt.\r
+ * \r
+ * @note\r
+ * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun \r
+ * error) and IDLE (Idle line detected) pending bits are cleared by \r
+ * software sequence: a read operation to USART_SR register \r
+ * (USART_GetITStatus()) followed by a read operation to USART_DR register \r
+ * (USART_ReceiveData()).\r
+ * - RXNE pending bit can be also cleared by a read to the USART_DR register \r
+ * (USART_ReceiveData()).\r
+ * - TC pending bit can be also cleared by software sequence: a read \r
+ * operation to USART_SR register (USART_GetITStatus()) followed by a write \r
+ * operation to USART_DR register (USART_SendData()).\r
+ * - TXE pending bit is cleared only by a write to the USART_DR register \r
+ * (USART_SendData()).\r
+ * @retval None\r
+ */\r
+void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT)\r
+{\r
+ uint16_t bitpos = 0x00, itmask = 0x00;\r
+ /* Check the parameters */\r
+ assert_param(IS_USART_ALL_PERIPH(USARTx));\r
+ assert_param(IS_USART_CLEAR_IT(USART_IT));\r
+ /* The CTS interrupt is not available for UART4 and UART5 */\r
+ if (USART_IT == USART_IT_CTS)\r
+ {\r
+ assert_param(IS_USART_123_PERIPH(USARTx));\r
+ } \r
+ \r
+ bitpos = USART_IT >> 0x08;\r
+ itmask = ((uint16_t)0x01 << (uint16_t)bitpos);\r
+ USARTx->SR = (uint16_t)~itmask;\r
+}\r
+/**\r
+ * @}\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/\r
projects / fw / stlink / blobdiff