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povik |
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/** |
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****************************************************************************** |
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* @file stm32f10x_usart.c |
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* @author MCD Application Team |
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* @version V3.1.0 |
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* @date 06/19/2009 |
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* @brief This file provides all the USART firmware functions. |
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****************************************************************************** |
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* @copy |
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* |
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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* |
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* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2> |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f10x_usart.h" |
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#include "stm32f10x_rcc.h" |
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/** @addtogroup STM32F10x_StdPeriph_Driver |
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* @{ |
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*/ |
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/** @defgroup USART |
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* @brief USART driver modules |
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* @{ |
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*/ |
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/** @defgroup USART_Private_TypesDefinitions |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup USART_Private_Defines |
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* @{ |
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*/ |
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#define CR1_UE_Set ((uint16_t)0x2000) /*!< USART Enable Mask */ |
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#define CR1_UE_Reset ((uint16_t)0xDFFF) /*!< USART Disable Mask */ |
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#define CR1_WAKE_Mask ((uint16_t)0xF7FF) /*!< USART WakeUp Method Mask */ |
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#define CR1_RWU_Set ((uint16_t)0x0002) /*!< USART mute mode Enable Mask */ |
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#define CR1_RWU_Reset ((uint16_t)0xFFFD) /*!< USART mute mode Enable Mask */ |
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#define CR1_SBK_Set ((uint16_t)0x0001) /*!< USART Break Character send Mask */ |
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#define CR1_CLEAR_Mask ((uint16_t)0xE9F3) /*!< USART CR1 Mask */ |
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#define CR2_Address_Mask ((uint16_t)0xFFF0) /*!< USART address Mask */ |
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#define CR2_LINEN_Set ((uint16_t)0x4000) /*!< USART LIN Enable Mask */ |
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#define CR2_LINEN_Reset ((uint16_t)0xBFFF) /*!< USART LIN Disable Mask */ |
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#define CR2_LBDL_Mask ((uint16_t)0xFFDF) /*!< USART LIN Break detection Mask */ |
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#define CR2_STOP_CLEAR_Mask ((uint16_t)0xCFFF) /*!< USART CR2 STOP Bits Mask */ |
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#define CR2_CLOCK_CLEAR_Mask ((uint16_t)0xF0FF) /*!< USART CR2 Clock Mask */ |
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#define CR3_SCEN_Set ((uint16_t)0x0020) /*!< USART SC Enable Mask */ |
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#define CR3_SCEN_Reset ((uint16_t)0xFFDF) /*!< USART SC Disable Mask */ |
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#define CR3_NACK_Set ((uint16_t)0x0010) /*!< USART SC NACK Enable Mask */ |
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#define CR3_NACK_Reset ((uint16_t)0xFFEF) /*!< USART SC NACK Disable Mask */ |
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#define CR3_HDSEL_Set ((uint16_t)0x0008) /*!< USART Half-Duplex Enable Mask */ |
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#define CR3_HDSEL_Reset ((uint16_t)0xFFF7) /*!< USART Half-Duplex Disable Mask */ |
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#define CR3_IRLP_Mask ((uint16_t)0xFFFB) /*!< USART IrDA LowPower mode Mask */ |
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#define CR3_CLEAR_Mask ((uint16_t)0xFCFF) /*!< USART CR3 Mask */ |
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#define CR3_IREN_Set ((uint16_t)0x0002) /*!< USART IrDA Enable Mask */ |
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#define CR3_IREN_Reset ((uint16_t)0xFFFD) /*!< USART IrDA Disable Mask */ |
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#define GTPR_LSB_Mask ((uint16_t)0x00FF) /*!< Guard Time Register LSB Mask */ |
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#define GTPR_MSB_Mask ((uint16_t)0xFF00) /*!< Guard Time Register MSB Mask */ |
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#define IT_Mask ((uint16_t)0x001F) /*!< USART Interrupt Mask */ |
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/** |
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* @} |
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*/ |
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/** @defgroup USART_Private_Macros |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup USART_Private_Variables |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup USART_Private_FunctionPrototypes |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup USART_Private_Functions |
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* @{ |
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*/ |
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/** |
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* @brief Deinitializes the USARTx peripheral registers to their default reset values. |
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* @param USARTx: Select the USART or the UART peripheral. |
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* This parameter can be one of the following values: USART1, USART2, USART3, UART4 or UART5. |
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* @retval None |
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*/ |
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void USART_DeInit(USART_TypeDef* USARTx) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_USART_ALL_PERIPH(USARTx)); |
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if (USARTx == USART1) |
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{ |
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RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE); |
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RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE); |
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} |
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else if (USARTx == USART2) |
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{ |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE); |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE); |
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} |
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else if (USARTx == USART3) |
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{ |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE); |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE); |
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} |
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else if (USARTx == UART4) |
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{ |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE); |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE); |
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} |
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else |
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{ |
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if (USARTx == UART5) |
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{ |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE); |
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE); |
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} |
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} |
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} |
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/** |
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* @brief Initializes the USARTx peripheral according to the specified |
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* parameters in the USART_InitStruct . |
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* @param USARTx: Select the USART or the UART peripheral. |
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* This parameter can be one of the following values: |
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* USART1, USART2, USART3, UART4 or UART5. |
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* @param USART_InitStruct: pointer to a USART_InitTypeDef structure |
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* that contains the configuration information for the specified USART peripheral. |
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* @retval None |
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*/ |
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void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct) |
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{ |
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uint32_t tmpreg = 0x00, apbclock = 0x00; |
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uint32_t integerdivider = 0x00; |
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uint32_t fractionaldivider = 0x00; |
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uint32_t usartxbase = 0; |
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RCC_ClocksTypeDef RCC_ClocksStatus; |
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/* Check the parameters */ |
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assert_param(IS_USART_ALL_PERIPH(USARTx)); |
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assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate)); |
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assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength)); |
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assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits)); |
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assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity)); |
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assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode)); |
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assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl)); |
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/* The hardware flow control is available only for USART1, USART2 and USART3 */ |
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if (USART_InitStruct->USART_HardwareFlowControl != USART_HardwareFlowControl_None) |
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{ |
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assert_param(IS_USART_123_PERIPH(USARTx)); |
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} |
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usartxbase = (uint32_t)USARTx; |
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/*---------------------------- USART CR2 Configuration -----------------------*/ |
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tmpreg = USARTx->CR2; |
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/* Clear STOP[13:12] bits */ |
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tmpreg &= CR2_STOP_CLEAR_Mask; |
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/* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/ |
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/* Set STOP[13:12] bits according to USART_StopBits value */ |
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tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits; |
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/* Write to USART CR2 */ |
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USARTx->CR2 = (uint16_t)tmpreg; |
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/*---------------------------- USART CR1 Configuration -----------------------*/ |
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tmpreg = USARTx->CR1; |
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/* Clear M, PCE, PS, TE and RE bits */ |
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tmpreg &= CR1_CLEAR_Mask; |
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/* Configure the USART Word Length, Parity and mode ----------------------- */ |
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/* Set the M bits according to USART_WordLength value */ |
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/* Set PCE and PS bits according to USART_Parity value */ |
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/* Set TE and RE bits according to USART_Mode value */ |
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tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity | |
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USART_InitStruct->USART_Mode; |
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/* Write to USART CR1 */ |
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USARTx->CR1 = (uint16_t)tmpreg; |
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/*---------------------------- USART CR3 Configuration -----------------------*/ |
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tmpreg = USARTx->CR3; |
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/* Clear CTSE and RTSE bits */ |
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tmpreg &= CR3_CLEAR_Mask; |
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/* Configure the USART HFC -------------------------------------------------*/ |
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/* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */ |
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tmpreg |= USART_InitStruct->USART_HardwareFlowControl; |
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/* Write to USART CR3 */ |
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USARTx->CR3 = (uint16_t)tmpreg; |
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/*---------------------------- USART BRR Configuration -----------------------*/ |
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/* Configure the USART Baud Rate -------------------------------------------*/ |
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RCC_GetClocksFreq(&RCC_ClocksStatus); |
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if (usartxbase == USART1_BASE) |
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{ |
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apbclock = RCC_ClocksStatus.PCLK2_Frequency; |
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} |
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else |
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{ |
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apbclock = RCC_ClocksStatus.PCLK1_Frequency; |
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} |
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/* Determine the integer part */ |
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integerdivider = ((0x19 * apbclock) / (0x04 * (USART_InitStruct->USART_BaudRate))); |
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tmpreg = (integerdivider / 0x64) << 0x04; |
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/* Determine the fractional part */ |
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fractionaldivider = integerdivider - (0x64 * (tmpreg >> 0x04)); |
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tmpreg |= ((((fractionaldivider * 0x10) + 0x32) / 0x64)) & ((uint8_t)0x0F); |
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/* Write to USART BRR */ |
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USARTx->BRR = (uint16_t)tmpreg; |
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} |
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/** |
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* @brief Fills each USART_InitStruct member with its default value. |
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* @param USART_InitStruct: pointer to a USART_InitTypeDef structure |
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* which will be initialized. |
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* @retval None |
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*/ |
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void USART_StructInit(USART_InitTypeDef* USART_InitStruct) |
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{ |
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/* USART_InitStruct members default value */ |
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USART_InitStruct->USART_BaudRate = 9600; |
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USART_InitStruct->USART_WordLength = USART_WordLength_8b; |
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USART_InitStruct->USART_StopBits = USART_StopBits_1; |
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USART_InitStruct->USART_Parity = USART_Parity_No ; |
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USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx; |
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USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
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} |
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/** |
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* @brief Initializes the USARTx peripheral Clock according to the |
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* specified parameters in the USART_ClockInitStruct . |
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* @param USARTx: where x can be 1, 2, 3 to select the USART peripheral. |
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* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef |
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* structure that contains the configuration information for the specified |
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* USART peripheral. |
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* @note The Smart Card mode is not available for UART4 and UART5. |
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* @retval None |
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*/ |
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void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct) |
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{ |
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uint32_t tmpreg = 0x00; |
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/* Check the parameters */ |
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assert_param(IS_USART_123_PERIPH(USARTx)); |
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assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock)); |
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assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL)); |
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assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA)); |
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assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit)); |
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/*---------------------------- USART CR2 Configuration -----------------------*/ |
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tmpreg = USARTx->CR2; |
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/* Clear CLKEN, CPOL, CPHA and LBCL bits */ |
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tmpreg &= CR2_CLOCK_CLEAR_Mask; |
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/* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/ |
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/* Set CLKEN bit according to USART_Clock value */ |
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/* Set CPOL bit according to USART_CPOL value */ |
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/* Set CPHA bit according to USART_CPHA value */ |
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/* Set LBCL bit according to USART_LastBit value */ |
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tmpreg |= (uint32_t)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL | |
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USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit; |
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/* Write to USART CR2 */ |
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USARTx->CR2 = (uint16_t)tmpreg; |
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} |
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/** |
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* @brief Fills each USART_ClockInitStruct member with its default value. |
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* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef |
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* structure which will be initialized. |
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* @retval None |
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*/ |
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void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct) |
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{ |
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/* USART_ClockInitStruct members default value */ |
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USART_ClockInitStruct->USART_Clock = USART_Clock_Disable; |
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USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low; |
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USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge; |
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USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable; |
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} |
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/** |
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* @brief Enables or disables the specified USART peripheral. |
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* @param USARTx: Select the USART or the UART peripheral. |
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* This parameter can be one of the following values: |
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* USART1, USART2, USART3, UART4 or UART5. |
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* @param NewState: new state of the USARTx peripheral. |
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* This parameter can be: ENABLE or DISABLE. |
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* @retval None |
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*/ |
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void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_USART_ALL_PERIPH(USARTx)); |
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assert_param(IS_FUNCTIONAL_STATE(NewState)); |
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if (NewState != DISABLE) |
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{ |
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/* Enable the selected USART by setting the UE bit in the CR1 register */ |
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USARTx->CR1 |= CR1_UE_Set; |
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} |
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else |
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{ |
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/* Disable the selected USART by clearing the UE bit in the CR1 register */ |
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USARTx->CR1 &= CR1_UE_Reset; |
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} |
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} |
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/** |
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* @brief Enables or disables the specified USART interrupts. |
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* @param USARTx: Select the USART or the UART peripheral. |
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|
340 |
* This parameter can be one of the following values: |
|
|
341 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
342 |
* @param USART_IT: specifies the USART interrupt sources to be enabled or disabled. |
|
|
343 |
* This parameter can be one of the following values: |
|
|
344 |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
|
|
345 |
* @arg USART_IT_LBD: LIN Break detection interrupt |
|
|
346 |
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt |
|
|
347 |
* @arg USART_IT_TC: Transmission complete interrupt |
|
|
348 |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt |
|
|
349 |
* @arg USART_IT_IDLE: Idle line detection interrupt |
|
|
350 |
* @arg USART_IT_PE: Parity Error interrupt |
|
|
351 |
* @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error) |
|
|
352 |
* @param NewState: new state of the specified USARTx interrupts. |
|
|
353 |
* This parameter can be: ENABLE or DISABLE. |
|
|
354 |
* @retval None |
|
|
355 |
*/ |
|
|
356 |
void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState) |
|
|
357 |
{ |
|
|
358 |
uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00; |
|
|
359 |
uint32_t usartxbase = 0x00; |
|
|
360 |
/* Check the parameters */ |
|
|
361 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
362 |
assert_param(IS_USART_CONFIG_IT(USART_IT)); |
|
|
363 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
364 |
/* The CTS interrupt is not available for UART4 and UART5 */ |
|
|
365 |
if (USART_IT == USART_IT_CTS) |
|
|
366 |
{ |
|
|
367 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
368 |
} |
|
|
369 |
|
|
|
370 |
usartxbase = (uint32_t)USARTx; |
|
|
371 |
|
|
|
372 |
/* Get the USART register index */ |
|
|
373 |
usartreg = (((uint8_t)USART_IT) >> 0x05); |
|
|
374 |
|
|
|
375 |
/* Get the interrupt position */ |
|
|
376 |
itpos = USART_IT & IT_Mask; |
|
|
377 |
itmask = (((uint32_t)0x01) << itpos); |
|
|
378 |
|
|
|
379 |
if (usartreg == 0x01) /* The IT is in CR1 register */ |
|
|
380 |
{ |
|
|
381 |
usartxbase += 0x0C; |
|
|
382 |
} |
|
|
383 |
else if (usartreg == 0x02) /* The IT is in CR2 register */ |
|
|
384 |
{ |
|
|
385 |
usartxbase += 0x10; |
|
|
386 |
} |
|
|
387 |
else /* The IT is in CR3 register */ |
|
|
388 |
{ |
|
|
389 |
usartxbase += 0x14; |
|
|
390 |
} |
|
|
391 |
if (NewState != DISABLE) |
|
|
392 |
{ |
|
|
393 |
*(__IO uint32_t*)usartxbase |= itmask; |
|
|
394 |
} |
|
|
395 |
else |
|
|
396 |
{ |
|
|
397 |
*(__IO uint32_t*)usartxbase &= ~itmask; |
|
|
398 |
} |
|
|
399 |
} |
|
|
400 |
|
|
|
401 |
/** |
|
|
402 |
* @brief Enables or disables the USARTs DMA interface. |
|
|
403 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
404 |
* This parameter can be one of the following values: |
|
|
405 |
* USART1, USART2, USART3 or UART4. |
|
|
406 |
* @param USART_DMAReq: specifies the DMA request. |
|
|
407 |
* This parameter can be any combination of the following values: |
|
|
408 |
* @arg USART_DMAReq_Tx: USART DMA transmit request |
|
|
409 |
* @arg USART_DMAReq_Rx: USART DMA receive request |
|
|
410 |
* @param NewState: new state of the DMA Request sources. |
|
|
411 |
* This parameter can be: ENABLE or DISABLE. |
|
|
412 |
* @note The DMA mode is not available for UART5. |
|
|
413 |
* @retval None |
|
|
414 |
*/ |
|
|
415 |
void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState) |
|
|
416 |
{ |
|
|
417 |
/* Check the parameters */ |
|
|
418 |
assert_param(IS_USART_1234_PERIPH(USARTx)); |
|
|
419 |
assert_param(IS_USART_DMAREQ(USART_DMAReq)); |
|
|
420 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
421 |
if (NewState != DISABLE) |
|
|
422 |
{ |
|
|
423 |
/* Enable the DMA transfer for selected requests by setting the DMAT and/or |
|
|
424 |
DMAR bits in the USART CR3 register */ |
|
|
425 |
USARTx->CR3 |= USART_DMAReq; |
|
|
426 |
} |
|
|
427 |
else |
|
|
428 |
{ |
|
|
429 |
/* Disable the DMA transfer for selected requests by clearing the DMAT and/or |
|
|
430 |
DMAR bits in the USART CR3 register */ |
|
|
431 |
USARTx->CR3 &= (uint16_t)~USART_DMAReq; |
|
|
432 |
} |
|
|
433 |
} |
|
|
434 |
|
|
|
435 |
/** |
|
|
436 |
* @brief Sets the address of the USART node. |
|
|
437 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
438 |
* This parameter can be one of the following values: |
|
|
439 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
440 |
* @param USART_Address: Indicates the address of the USART node. |
|
|
441 |
* @retval None |
|
|
442 |
*/ |
|
|
443 |
void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address) |
|
|
444 |
{ |
|
|
445 |
/* Check the parameters */ |
|
|
446 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
447 |
assert_param(IS_USART_ADDRESS(USART_Address)); |
|
|
448 |
|
|
|
449 |
/* Clear the USART address */ |
|
|
450 |
USARTx->CR2 &= CR2_Address_Mask; |
|
|
451 |
/* Set the USART address node */ |
|
|
452 |
USARTx->CR2 |= USART_Address; |
|
|
453 |
} |
|
|
454 |
|
|
|
455 |
/** |
|
|
456 |
* @brief Selects the USART WakeUp method. |
|
|
457 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
458 |
* This parameter can be one of the following values: |
|
|
459 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
460 |
* @param USART_WakeUp: specifies the USART wakeup method. |
|
|
461 |
* This parameter can be one of the following values: |
|
|
462 |
* @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection |
|
|
463 |
* @arg USART_WakeUp_AddressMark: WakeUp by an address mark |
|
|
464 |
* @retval None |
|
|
465 |
*/ |
|
|
466 |
void USART_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp) |
|
|
467 |
{ |
|
|
468 |
/* Check the parameters */ |
|
|
469 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
470 |
assert_param(IS_USART_WAKEUP(USART_WakeUp)); |
|
|
471 |
|
|
|
472 |
USARTx->CR1 &= CR1_WAKE_Mask; |
|
|
473 |
USARTx->CR1 |= USART_WakeUp; |
|
|
474 |
} |
|
|
475 |
|
|
|
476 |
/** |
|
|
477 |
* @brief Determines if the USART is in mute mode or not. |
|
|
478 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
479 |
* This parameter can be one of the following values: |
|
|
480 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
481 |
* @param NewState: new state of the USART mute mode. |
|
|
482 |
* This parameter can be: ENABLE or DISABLE. |
|
|
483 |
* @retval None |
|
|
484 |
*/ |
|
|
485 |
void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
486 |
{ |
|
|
487 |
/* Check the parameters */ |
|
|
488 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
489 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
490 |
|
|
|
491 |
if (NewState != DISABLE) |
|
|
492 |
{ |
|
|
493 |
/* Enable the USART mute mode by setting the RWU bit in the CR1 register */ |
|
|
494 |
USARTx->CR1 |= CR1_RWU_Set; |
|
|
495 |
} |
|
|
496 |
else |
|
|
497 |
{ |
|
|
498 |
/* Disable the USART mute mode by clearing the RWU bit in the CR1 register */ |
|
|
499 |
USARTx->CR1 &= CR1_RWU_Reset; |
|
|
500 |
} |
|
|
501 |
} |
|
|
502 |
|
|
|
503 |
/** |
|
|
504 |
* @brief Sets the USART LIN Break detection length. |
|
|
505 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
506 |
* This parameter can be one of the following values: |
|
|
507 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
508 |
* @param USART_LINBreakDetectLength: specifies the LIN break detection length. |
|
|
509 |
* This parameter can be one of the following values: |
|
|
510 |
* @arg USART_LINBreakDetectLength_10b: 10-bit break detection |
|
|
511 |
* @arg USART_LINBreakDetectLength_11b: 11-bit break detection |
|
|
512 |
* @retval None |
|
|
513 |
*/ |
|
|
514 |
void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength) |
|
|
515 |
{ |
|
|
516 |
/* Check the parameters */ |
|
|
517 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
518 |
assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength)); |
|
|
519 |
|
|
|
520 |
USARTx->CR2 &= CR2_LBDL_Mask; |
|
|
521 |
USARTx->CR2 |= USART_LINBreakDetectLength; |
|
|
522 |
} |
|
|
523 |
|
|
|
524 |
/** |
|
|
525 |
* @brief Enables or disables the USARTs LIN mode. |
|
|
526 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
527 |
* This parameter can be one of the following values: |
|
|
528 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
529 |
* @param NewState: new state of the USART LIN mode. |
|
|
530 |
* This parameter can be: ENABLE or DISABLE. |
|
|
531 |
* @retval None |
|
|
532 |
*/ |
|
|
533 |
void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
534 |
{ |
|
|
535 |
/* Check the parameters */ |
|
|
536 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
537 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
538 |
|
|
|
539 |
if (NewState != DISABLE) |
|
|
540 |
{ |
|
|
541 |
/* Enable the LIN mode by setting the LINEN bit in the CR2 register */ |
|
|
542 |
USARTx->CR2 |= CR2_LINEN_Set; |
|
|
543 |
} |
|
|
544 |
else |
|
|
545 |
{ |
|
|
546 |
/* Disable the LIN mode by clearing the LINEN bit in the CR2 register */ |
|
|
547 |
USARTx->CR2 &= CR2_LINEN_Reset; |
|
|
548 |
} |
|
|
549 |
} |
|
|
550 |
|
|
|
551 |
/** |
|
|
552 |
* @brief Transmits single data through the USARTx peripheral. |
|
|
553 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
554 |
* This parameter can be one of the following values: |
|
|
555 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
556 |
* @param Data: the data to transmit. |
|
|
557 |
* @retval None |
|
|
558 |
*/ |
|
|
559 |
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data) |
|
|
560 |
{ |
|
|
561 |
/* Check the parameters */ |
|
|
562 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
563 |
assert_param(IS_USART_DATA(Data)); |
|
|
564 |
|
|
|
565 |
/* Transmit Data */ |
|
|
566 |
USARTx->DR = (Data & (uint16_t)0x01FF); |
|
|
567 |
} |
|
|
568 |
|
|
|
569 |
/** |
|
|
570 |
* @brief Returns the most recent received data by the USARTx peripheral. |
|
|
571 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
572 |
* This parameter can be one of the following values: |
|
|
573 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
574 |
* @retval The received data. |
|
|
575 |
*/ |
|
|
576 |
uint16_t USART_ReceiveData(USART_TypeDef* USARTx) |
|
|
577 |
{ |
|
|
578 |
/* Check the parameters */ |
|
|
579 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
580 |
|
|
|
581 |
/* Receive Data */ |
|
|
582 |
return (uint16_t)(USARTx->DR & (uint16_t)0x01FF); |
|
|
583 |
} |
|
|
584 |
|
|
|
585 |
/** |
|
|
586 |
* @brief Transmits break characters. |
|
|
587 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
588 |
* This parameter can be one of the following values: |
|
|
589 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
590 |
* @retval None |
|
|
591 |
*/ |
|
|
592 |
void USART_SendBreak(USART_TypeDef* USARTx) |
|
|
593 |
{ |
|
|
594 |
/* Check the parameters */ |
|
|
595 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
596 |
|
|
|
597 |
/* Send break characters */ |
|
|
598 |
USARTx->CR1 |= CR1_SBK_Set; |
|
|
599 |
} |
|
|
600 |
|
|
|
601 |
/** |
|
|
602 |
* @brief Sets the specified USART guard time. |
|
|
603 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
|
|
604 |
* @param USART_GuardTime: specifies the guard time. |
|
|
605 |
* @note The guard time bits are not available for UART4 and UART5. |
|
|
606 |
* @retval None |
|
|
607 |
*/ |
|
|
608 |
void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime) |
|
|
609 |
{ |
|
|
610 |
/* Check the parameters */ |
|
|
611 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
612 |
|
|
|
613 |
/* Clear the USART Guard time */ |
|
|
614 |
USARTx->GTPR &= GTPR_LSB_Mask; |
|
|
615 |
/* Set the USART guard time */ |
|
|
616 |
USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08); |
|
|
617 |
} |
|
|
618 |
|
|
|
619 |
/** |
|
|
620 |
* @brief Sets the system clock prescaler. |
|
|
621 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
622 |
* This parameter can be one of the following values: |
|
|
623 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
624 |
* @param USART_Prescaler: specifies the prescaler clock. |
|
|
625 |
* @note The function is used for IrDA mode with UART4 and UART5. |
|
|
626 |
* @retval None |
|
|
627 |
*/ |
|
|
628 |
void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler) |
|
|
629 |
{ |
|
|
630 |
/* Check the parameters */ |
|
|
631 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
632 |
|
|
|
633 |
/* Clear the USART prescaler */ |
|
|
634 |
USARTx->GTPR &= GTPR_MSB_Mask; |
|
|
635 |
/* Set the USART prescaler */ |
|
|
636 |
USARTx->GTPR |= USART_Prescaler; |
|
|
637 |
} |
|
|
638 |
|
|
|
639 |
/** |
|
|
640 |
* @brief Enables or disables the USARTs Smart Card mode. |
|
|
641 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
|
|
642 |
* @param NewState: new state of the Smart Card mode. |
|
|
643 |
* This parameter can be: ENABLE or DISABLE. |
|
|
644 |
* @note The Smart Card mode is not available for UART4 and UART5. |
|
|
645 |
* @retval None |
|
|
646 |
*/ |
|
|
647 |
void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
648 |
{ |
|
|
649 |
/* Check the parameters */ |
|
|
650 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
651 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
652 |
if (NewState != DISABLE) |
|
|
653 |
{ |
|
|
654 |
/* Enable the SC mode by setting the SCEN bit in the CR3 register */ |
|
|
655 |
USARTx->CR3 |= CR3_SCEN_Set; |
|
|
656 |
} |
|
|
657 |
else |
|
|
658 |
{ |
|
|
659 |
/* Disable the SC mode by clearing the SCEN bit in the CR3 register */ |
|
|
660 |
USARTx->CR3 &= CR3_SCEN_Reset; |
|
|
661 |
} |
|
|
662 |
} |
|
|
663 |
|
|
|
664 |
/** |
|
|
665 |
* @brief Enables or disables NACK transmission. |
|
|
666 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
|
|
667 |
* @param NewState: new state of the NACK transmission. |
|
|
668 |
* This parameter can be: ENABLE or DISABLE. |
|
|
669 |
* @note The Smart Card mode is not available for UART4 and UART5. |
|
|
670 |
* @retval None |
|
|
671 |
*/ |
|
|
672 |
void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
673 |
{ |
|
|
674 |
/* Check the parameters */ |
|
|
675 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
676 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
677 |
if (NewState != DISABLE) |
|
|
678 |
{ |
|
|
679 |
/* Enable the NACK transmission by setting the NACK bit in the CR3 register */ |
|
|
680 |
USARTx->CR3 |= CR3_NACK_Set; |
|
|
681 |
} |
|
|
682 |
else |
|
|
683 |
{ |
|
|
684 |
/* Disable the NACK transmission by clearing the NACK bit in the CR3 register */ |
|
|
685 |
USARTx->CR3 &= CR3_NACK_Reset; |
|
|
686 |
} |
|
|
687 |
} |
|
|
688 |
|
|
|
689 |
/** |
|
|
690 |
* @brief Enables or disables the USARTs Half Duplex communication. |
|
|
691 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
692 |
* This parameter can be one of the following values: |
|
|
693 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
694 |
* @param NewState: new state of the USART Communication. |
|
|
695 |
* This parameter can be: ENABLE or DISABLE. |
|
|
696 |
* @retval None |
|
|
697 |
*/ |
|
|
698 |
void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
699 |
{ |
|
|
700 |
/* Check the parameters */ |
|
|
701 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
702 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
703 |
|
|
|
704 |
if (NewState != DISABLE) |
|
|
705 |
{ |
|
|
706 |
/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */ |
|
|
707 |
USARTx->CR3 |= CR3_HDSEL_Set; |
|
|
708 |
} |
|
|
709 |
else |
|
|
710 |
{ |
|
|
711 |
/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */ |
|
|
712 |
USARTx->CR3 &= CR3_HDSEL_Reset; |
|
|
713 |
} |
|
|
714 |
} |
|
|
715 |
|
|
|
716 |
/** |
|
|
717 |
* @brief Configures the USARTs IrDA interface. |
|
|
718 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
719 |
* This parameter can be one of the following values: |
|
|
720 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
721 |
* @param USART_IrDAMode: specifies the IrDA mode. |
|
|
722 |
* This parameter can be one of the following values: |
|
|
723 |
* @arg USART_IrDAMode_LowPower |
|
|
724 |
* @arg USART_IrDAMode_Normal |
|
|
725 |
* @retval None |
|
|
726 |
*/ |
|
|
727 |
void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode) |
|
|
728 |
{ |
|
|
729 |
/* Check the parameters */ |
|
|
730 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
731 |
assert_param(IS_USART_IRDA_MODE(USART_IrDAMode)); |
|
|
732 |
|
|
|
733 |
USARTx->CR3 &= CR3_IRLP_Mask; |
|
|
734 |
USARTx->CR3 |= USART_IrDAMode; |
|
|
735 |
} |
|
|
736 |
|
|
|
737 |
/** |
|
|
738 |
* @brief Enables or disables the USARTs IrDA interface. |
|
|
739 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
740 |
* This parameter can be one of the following values: |
|
|
741 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
742 |
* @param NewState: new state of the IrDA mode. |
|
|
743 |
* This parameter can be: ENABLE or DISABLE. |
|
|
744 |
* @retval None |
|
|
745 |
*/ |
|
|
746 |
void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState) |
|
|
747 |
{ |
|
|
748 |
/* Check the parameters */ |
|
|
749 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
750 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
751 |
|
|
|
752 |
if (NewState != DISABLE) |
|
|
753 |
{ |
|
|
754 |
/* Enable the IrDA mode by setting the IREN bit in the CR3 register */ |
|
|
755 |
USARTx->CR3 |= CR3_IREN_Set; |
|
|
756 |
} |
|
|
757 |
else |
|
|
758 |
{ |
|
|
759 |
/* Disable the IrDA mode by clearing the IREN bit in the CR3 register */ |
|
|
760 |
USARTx->CR3 &= CR3_IREN_Reset; |
|
|
761 |
} |
|
|
762 |
} |
|
|
763 |
|
|
|
764 |
/** |
|
|
765 |
* @brief Checks whether the specified USART flag is set or not. |
|
|
766 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
767 |
* This parameter can be one of the following values: |
|
|
768 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
769 |
* @param USART_FLAG: specifies the flag to check. |
|
|
770 |
* This parameter can be one of the following values: |
|
|
771 |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5) |
|
|
772 |
* @arg USART_FLAG_LBD: LIN Break detection flag |
|
|
773 |
* @arg USART_FLAG_TXE: Transmit data register empty flag |
|
|
774 |
* @arg USART_FLAG_TC: Transmission Complete flag |
|
|
775 |
* @arg USART_FLAG_RXNE: Receive data register not empty flag |
|
|
776 |
* @arg USART_FLAG_IDLE: Idle Line detection flag |
|
|
777 |
* @arg USART_FLAG_ORE: OverRun Error flag |
|
|
778 |
* @arg USART_FLAG_NE: Noise Error flag |
|
|
779 |
* @arg USART_FLAG_FE: Framing Error flag |
|
|
780 |
* @arg USART_FLAG_PE: Parity Error flag |
|
|
781 |
* @retval The new state of USART_FLAG (SET or RESET). |
|
|
782 |
*/ |
|
|
783 |
FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
|
|
784 |
{ |
|
|
785 |
FlagStatus bitstatus = RESET; |
|
|
786 |
/* Check the parameters */ |
|
|
787 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
788 |
assert_param(IS_USART_FLAG(USART_FLAG)); |
|
|
789 |
/* The CTS flag is not available for UART4 and UART5 */ |
|
|
790 |
if (USART_FLAG == USART_FLAG_CTS) |
|
|
791 |
{ |
|
|
792 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
793 |
} |
|
|
794 |
|
|
|
795 |
if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET) |
|
|
796 |
{ |
|
|
797 |
bitstatus = SET; |
|
|
798 |
} |
|
|
799 |
else |
|
|
800 |
{ |
|
|
801 |
bitstatus = RESET; |
|
|
802 |
} |
|
|
803 |
return bitstatus; |
|
|
804 |
} |
|
|
805 |
|
|
|
806 |
/** |
|
|
807 |
* @brief Clears the USARTx's pending flags. |
|
|
808 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
809 |
* This parameter can be one of the following values: |
|
|
810 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
811 |
* @param USART_FLAG: specifies the flag to clear. |
|
|
812 |
* This parameter can be any combination of the following values: |
|
|
813 |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5). |
|
|
814 |
* @arg USART_FLAG_LBD: LIN Break detection flag. |
|
|
815 |
* @arg USART_FLAG_TC: Transmission Complete flag. |
|
|
816 |
* @arg USART_FLAG_RXNE: Receive data register not empty flag. |
|
|
817 |
* |
|
|
818 |
* @note |
|
|
819 |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
|
|
820 |
* error) and IDLE (Idle line detected) flags are cleared by software |
|
|
821 |
* sequence: a read operation to USART_SR register (USART_GetFlagStatus()) |
|
|
822 |
* followed by a read operation to USART_DR register (USART_ReceiveData()). |
|
|
823 |
* - RXNE flag can be also cleared by a read to the USART_DR register |
|
|
824 |
* (USART_ReceiveData()). |
|
|
825 |
* - TC flag can be also cleared by software sequence: a read operation to |
|
|
826 |
* USART_SR register (USART_GetFlagStatus()) followed by a write operation |
|
|
827 |
* to USART_DR register (USART_SendData()). |
|
|
828 |
* - TXE flag is cleared only by a write to the USART_DR register |
|
|
829 |
* (USART_SendData()). |
|
|
830 |
* @retval None |
|
|
831 |
*/ |
|
|
832 |
void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
|
|
833 |
{ |
|
|
834 |
/* Check the parameters */ |
|
|
835 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
836 |
assert_param(IS_USART_CLEAR_FLAG(USART_FLAG)); |
|
|
837 |
/* The CTS flag is not available for UART4 and UART5 */ |
|
|
838 |
if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS) |
|
|
839 |
{ |
|
|
840 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
841 |
} |
|
|
842 |
|
|
|
843 |
USARTx->SR = (uint16_t)~USART_FLAG; |
|
|
844 |
} |
|
|
845 |
|
|
|
846 |
/** |
|
|
847 |
* @brief Checks whether the specified USART interrupt has occurred or not. |
|
|
848 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
849 |
* This parameter can be one of the following values: |
|
|
850 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
851 |
* @param USART_IT: specifies the USART interrupt source to check. |
|
|
852 |
* This parameter can be one of the following values: |
|
|
853 |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
|
|
854 |
* @arg USART_IT_LBD: LIN Break detection interrupt |
|
|
855 |
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt |
|
|
856 |
* @arg USART_IT_TC: Transmission complete interrupt |
|
|
857 |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt |
|
|
858 |
* @arg USART_IT_IDLE: Idle line detection interrupt |
|
|
859 |
* @arg USART_IT_ORE: OverRun Error interrupt |
|
|
860 |
* @arg USART_IT_NE: Noise Error interrupt |
|
|
861 |
* @arg USART_IT_FE: Framing Error interrupt |
|
|
862 |
* @arg USART_IT_PE: Parity Error interrupt |
|
|
863 |
* @retval The new state of USART_IT (SET or RESET). |
|
|
864 |
*/ |
|
|
865 |
ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT) |
|
|
866 |
{ |
|
|
867 |
uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00; |
|
|
868 |
ITStatus bitstatus = RESET; |
|
|
869 |
/* Check the parameters */ |
|
|
870 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
871 |
assert_param(IS_USART_GET_IT(USART_IT)); |
|
|
872 |
/* The CTS interrupt is not available for UART4 and UART5 */ |
|
|
873 |
if (USART_IT == USART_IT_CTS) |
|
|
874 |
{ |
|
|
875 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
876 |
} |
|
|
877 |
|
|
|
878 |
/* Get the USART register index */ |
|
|
879 |
usartreg = (((uint8_t)USART_IT) >> 0x05); |
|
|
880 |
/* Get the interrupt position */ |
|
|
881 |
itmask = USART_IT & IT_Mask; |
|
|
882 |
itmask = (uint32_t)0x01 << itmask; |
|
|
883 |
|
|
|
884 |
if (usartreg == 0x01) /* The IT is in CR1 register */ |
|
|
885 |
{ |
|
|
886 |
itmask &= USARTx->CR1; |
|
|
887 |
} |
|
|
888 |
else if (usartreg == 0x02) /* The IT is in CR2 register */ |
|
|
889 |
{ |
|
|
890 |
itmask &= USARTx->CR2; |
|
|
891 |
} |
|
|
892 |
else /* The IT is in CR3 register */ |
|
|
893 |
{ |
|
|
894 |
itmask &= USARTx->CR3; |
|
|
895 |
} |
|
|
896 |
|
|
|
897 |
bitpos = USART_IT >> 0x08; |
|
|
898 |
bitpos = (uint32_t)0x01 << bitpos; |
|
|
899 |
bitpos &= USARTx->SR; |
|
|
900 |
if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET)) |
|
|
901 |
{ |
|
|
902 |
bitstatus = SET; |
|
|
903 |
} |
|
|
904 |
else |
|
|
905 |
{ |
|
|
906 |
bitstatus = RESET; |
|
|
907 |
} |
|
|
908 |
|
|
|
909 |
return bitstatus; |
|
|
910 |
} |
|
|
911 |
|
|
|
912 |
/** |
|
|
913 |
* @brief Clears the USARTxs interrupt pending bits. |
|
|
914 |
* @param USARTx: Select the USART or the UART peripheral. |
|
|
915 |
* This parameter can be one of the following values: |
|
|
916 |
* USART1, USART2, USART3, UART4 or UART5. |
|
|
917 |
* @param USART_IT: specifies the interrupt pending bit to clear. |
|
|
918 |
* This parameter can be one of the following values: |
|
|
919 |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
|
|
920 |
* @arg USART_IT_LBD: LIN Break detection interrupt |
|
|
921 |
* @arg USART_IT_TC: Transmission complete interrupt. |
|
|
922 |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt. |
|
|
923 |
* |
|
|
924 |
* @note |
|
|
925 |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
|
|
926 |
* error) and IDLE (Idle line detected) pending bits are cleared by |
|
|
927 |
* software sequence: a read operation to USART_SR register |
|
|
928 |
* (USART_GetITStatus()) followed by a read operation to USART_DR register |
|
|
929 |
* (USART_ReceiveData()). |
|
|
930 |
* - RXNE pending bit can be also cleared by a read to the USART_DR register |
|
|
931 |
* (USART_ReceiveData()). |
|
|
932 |
* - TC pending bit can be also cleared by software sequence: a read |
|
|
933 |
* operation to USART_SR register (USART_GetITStatus()) followed by a write |
|
|
934 |
* operation to USART_DR register (USART_SendData()). |
|
|
935 |
* - TXE pending bit is cleared only by a write to the USART_DR register |
|
|
936 |
* (USART_SendData()). |
|
|
937 |
* @retval None |
|
|
938 |
*/ |
|
|
939 |
void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT) |
|
|
940 |
{ |
|
|
941 |
uint16_t bitpos = 0x00, itmask = 0x00; |
|
|
942 |
/* Check the parameters */ |
|
|
943 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
|
|
944 |
assert_param(IS_USART_CLEAR_IT(USART_IT)); |
|
|
945 |
/* The CTS interrupt is not available for UART4 and UART5 */ |
|
|
946 |
if (USART_IT == USART_IT_CTS) |
|
|
947 |
{ |
|
|
948 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
|
|
949 |
} |
|
|
950 |
|
|
|
951 |
bitpos = USART_IT >> 0x08; |
|
|
952 |
itmask = ((uint16_t)0x01 << (uint16_t)bitpos); |
|
|
953 |
USARTx->SR = (uint16_t)~itmask; |
|
|
954 |
} |
|
|
955 |
/** |
|
|
956 |
* @} |
|
|
957 |
*/ |
|
|
958 |
|
|
|
959 |
/** |
|
|
960 |
* @} |
|
|
961 |
*/ |
|
|
962 |
|
|
|
963 |
/** |
|
|
964 |
* @} |
|
|
965 |
*/ |
|
|
966 |
|
|
|
967 |
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ |