amiro-blt / Target / Modules / LightRing_1-0 / Boot / lib / STM32F10x_StdPeriph_Driver / src / stm32f10x_usart.c @ 367c0652
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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 V3.5.0
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* @date 11-March-2011
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* @brief This file provides all the USART firmware functions.
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******************************************************************************
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* @attention
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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 2011 STMicroelectronics</center></h2>
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******************************************************************************
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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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/* USART OverSampling-8 Mask */
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#define CR1_OVER8_Set ((u16)0x8000) /* USART OVER8 mode Enable Mask */ |
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#define CR1_OVER8_Reset ((u16)0x7FFF) /* USART OVER8 mode Disable Mask */ |
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/* USART One Bit Sampling Mask */
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#define CR3_ONEBITE_Set ((u16)0x0800) /* USART ONEBITE mode Enable Mask */ |
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#define CR3_ONEBITE_Reset ((u16)0xF7FF) /* USART ONEBITE mode Disable 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:
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* 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
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* 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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if ((USARTx->CR1 & CR1_OVER8_Set) != 0) |
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{ |
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/* Integer part computing in case Oversampling mode is 8 Samples */
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integerdivider = ((25 * apbclock) / (2 * (USART_InitStruct->USART_BaudRate))); |
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} |
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else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */ |
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{ |
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/* Integer part computing in case Oversampling mode is 16 Samples */
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integerdivider = ((25 * apbclock) / (4 * (USART_InitStruct->USART_BaudRate))); |
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} |
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tmpreg = (integerdivider / 100) << 4; |
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/* Determine the fractional part */
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fractionaldivider = integerdivider - (100 * (tmpreg >> 4)); |
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/* Implement the fractional part in the register */
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if ((USARTx->CR1 & CR1_OVER8_Set) != 0) |
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{ |
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tmpreg |= ((((fractionaldivider * 8) + 50) / 100)) & ((uint8_t)0x07); |
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} |
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else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */ |
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{ |
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tmpreg |= ((((fractionaldivider * 16) + 50) / 100)) & ((uint8_t)0x0F); |
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} |
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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 and Synchronous modes are 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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* 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_IT: specifies the USART interrupt sources to be enabled or disabled.
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* This parameter can be one of the following values:
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* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
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* @arg USART_IT_LBD: LIN Break detection interrupt
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* @arg USART_IT_TXE: Transmit Data Register empty interrupt
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* @arg USART_IT_TC: Transmission complete interrupt
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* @arg USART_IT_RXNE: Receive Data register not empty interrupt
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* @arg USART_IT_IDLE: Idle line detection interrupt
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* @arg USART_IT_PE: Parity Error interrupt
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* @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
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* @param NewState: new state of the specified USARTx interrupts.
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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_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState)
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{ |
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uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00; |
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uint32_t usartxbase = 0x00;
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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_CONFIG_IT(USART_IT)); |
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assert_param(IS_FUNCTIONAL_STATE(NewState)); |
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/* The CTS interrupt is not available for UART4 and UART5 */
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if (USART_IT == USART_IT_CTS)
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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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/* Get the USART register index */
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usartreg = (((uint8_t)USART_IT) >> 0x05);
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/* Get the interrupt position */
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itpos = USART_IT & IT_Mask; |
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itmask = (((uint32_t)0x01) << itpos);
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if (usartreg == 0x01) /* The IT is in CR1 register */ |
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{ |
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usartxbase += 0x0C;
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} |
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else if (usartreg == 0x02) /* The IT is in CR2 register */ |
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{ |
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usartxbase += 0x10;
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} |
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else /* The IT is in CR3 register */ |
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{ |
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usartxbase += 0x14;
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} |
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if (NewState != DISABLE)
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{ |
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*(__IO uint32_t*)usartxbase |= itmask; |
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} |
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else
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{ |
429 |
*(__IO uint32_t*)usartxbase &= ~itmask; |
430 |
} |
431 |
} |
432 |
|
433 |
/**
|
434 |
* @brief Enables or disables the USART?s DMA interface.
|
435 |
* @param USARTx: Select the USART or the UART peripheral.
|
436 |
* This parameter can be one of the following values:
|
437 |
* USART1, USART2, USART3, UART4 or UART5.
|
438 |
* @param USART_DMAReq: specifies the DMA request.
|
439 |
* This parameter can be any combination of the following values:
|
440 |
* @arg USART_DMAReq_Tx: USART DMA transmit request
|
441 |
* @arg USART_DMAReq_Rx: USART DMA receive request
|
442 |
* @param NewState: new state of the DMA Request sources.
|
443 |
* This parameter can be: ENABLE or DISABLE.
|
444 |
* @note The DMA mode is not available for UART5 except in the STM32
|
445 |
* High density value line devices(STM32F10X_HD_VL).
|
446 |
* @retval None
|
447 |
*/
|
448 |
void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState)
|
449 |
{ |
450 |
/* Check the parameters */
|
451 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
452 |
assert_param(IS_USART_DMAREQ(USART_DMAReq)); |
453 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
454 |
if (NewState != DISABLE)
|
455 |
{ |
456 |
/* Enable the DMA transfer for selected requests by setting the DMAT and/or
|
457 |
DMAR bits in the USART CR3 register */
|
458 |
USARTx->CR3 |= USART_DMAReq; |
459 |
} |
460 |
else
|
461 |
{ |
462 |
/* Disable the DMA transfer for selected requests by clearing the DMAT and/or
|
463 |
DMAR bits in the USART CR3 register */
|
464 |
USARTx->CR3 &= (uint16_t)~USART_DMAReq; |
465 |
} |
466 |
} |
467 |
|
468 |
/**
|
469 |
* @brief Sets the address of the USART node.
|
470 |
* @param USARTx: Select the USART or the UART peripheral.
|
471 |
* This parameter can be one of the following values:
|
472 |
* USART1, USART2, USART3, UART4 or UART5.
|
473 |
* @param USART_Address: Indicates the address of the USART node.
|
474 |
* @retval None
|
475 |
*/
|
476 |
void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
|
477 |
{ |
478 |
/* Check the parameters */
|
479 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
480 |
assert_param(IS_USART_ADDRESS(USART_Address)); |
481 |
|
482 |
/* Clear the USART address */
|
483 |
USARTx->CR2 &= CR2_Address_Mask; |
484 |
/* Set the USART address node */
|
485 |
USARTx->CR2 |= USART_Address; |
486 |
} |
487 |
|
488 |
/**
|
489 |
* @brief Selects the USART WakeUp method.
|
490 |
* @param USARTx: Select the USART or the UART peripheral.
|
491 |
* This parameter can be one of the following values:
|
492 |
* USART1, USART2, USART3, UART4 or UART5.
|
493 |
* @param USART_WakeUp: specifies the USART wakeup method.
|
494 |
* This parameter can be one of the following values:
|
495 |
* @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
|
496 |
* @arg USART_WakeUp_AddressMark: WakeUp by an address mark
|
497 |
* @retval None
|
498 |
*/
|
499 |
void USART_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp)
|
500 |
{ |
501 |
/* Check the parameters */
|
502 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
503 |
assert_param(IS_USART_WAKEUP(USART_WakeUp)); |
504 |
|
505 |
USARTx->CR1 &= CR1_WAKE_Mask; |
506 |
USARTx->CR1 |= USART_WakeUp; |
507 |
} |
508 |
|
509 |
/**
|
510 |
* @brief Determines if the USART is in mute mode or not.
|
511 |
* @param USARTx: Select the USART or the UART peripheral.
|
512 |
* This parameter can be one of the following values:
|
513 |
* USART1, USART2, USART3, UART4 or UART5.
|
514 |
* @param NewState: new state of the USART mute mode.
|
515 |
* This parameter can be: ENABLE or DISABLE.
|
516 |
* @retval None
|
517 |
*/
|
518 |
void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
519 |
{ |
520 |
/* Check the parameters */
|
521 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
522 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
523 |
|
524 |
if (NewState != DISABLE)
|
525 |
{ |
526 |
/* Enable the USART mute mode by setting the RWU bit in the CR1 register */
|
527 |
USARTx->CR1 |= CR1_RWU_Set; |
528 |
} |
529 |
else
|
530 |
{ |
531 |
/* Disable the USART mute mode by clearing the RWU bit in the CR1 register */
|
532 |
USARTx->CR1 &= CR1_RWU_Reset; |
533 |
} |
534 |
} |
535 |
|
536 |
/**
|
537 |
* @brief Sets the USART LIN Break detection length.
|
538 |
* @param USARTx: Select the USART or the UART peripheral.
|
539 |
* This parameter can be one of the following values:
|
540 |
* USART1, USART2, USART3, UART4 or UART5.
|
541 |
* @param USART_LINBreakDetectLength: specifies the LIN break detection length.
|
542 |
* This parameter can be one of the following values:
|
543 |
* @arg USART_LINBreakDetectLength_10b: 10-bit break detection
|
544 |
* @arg USART_LINBreakDetectLength_11b: 11-bit break detection
|
545 |
* @retval None
|
546 |
*/
|
547 |
void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength)
|
548 |
{ |
549 |
/* Check the parameters */
|
550 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
551 |
assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength)); |
552 |
|
553 |
USARTx->CR2 &= CR2_LBDL_Mask; |
554 |
USARTx->CR2 |= USART_LINBreakDetectLength; |
555 |
} |
556 |
|
557 |
/**
|
558 |
* @brief Enables or disables the USART?s LIN mode.
|
559 |
* @param USARTx: Select the USART or the UART peripheral.
|
560 |
* This parameter can be one of the following values:
|
561 |
* USART1, USART2, USART3, UART4 or UART5.
|
562 |
* @param NewState: new state of the USART LIN mode.
|
563 |
* This parameter can be: ENABLE or DISABLE.
|
564 |
* @retval None
|
565 |
*/
|
566 |
void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
567 |
{ |
568 |
/* Check the parameters */
|
569 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
570 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
571 |
|
572 |
if (NewState != DISABLE)
|
573 |
{ |
574 |
/* Enable the LIN mode by setting the LINEN bit in the CR2 register */
|
575 |
USARTx->CR2 |= CR2_LINEN_Set; |
576 |
} |
577 |
else
|
578 |
{ |
579 |
/* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
|
580 |
USARTx->CR2 &= CR2_LINEN_Reset; |
581 |
} |
582 |
} |
583 |
|
584 |
/**
|
585 |
* @brief Transmits single data through the USARTx peripheral.
|
586 |
* @param USARTx: Select the USART or the UART peripheral.
|
587 |
* This parameter can be one of the following values:
|
588 |
* USART1, USART2, USART3, UART4 or UART5.
|
589 |
* @param Data: the data to transmit.
|
590 |
* @retval None
|
591 |
*/
|
592 |
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
|
593 |
{ |
594 |
/* Check the parameters */
|
595 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
596 |
assert_param(IS_USART_DATA(Data)); |
597 |
|
598 |
/* Transmit Data */
|
599 |
USARTx->DR = (Data & (uint16_t)0x01FF);
|
600 |
} |
601 |
|
602 |
/**
|
603 |
* @brief Returns the most recent received data by the USARTx peripheral.
|
604 |
* @param USARTx: Select the USART or the UART peripheral.
|
605 |
* This parameter can be one of the following values:
|
606 |
* USART1, USART2, USART3, UART4 or UART5.
|
607 |
* @retval The received data.
|
608 |
*/
|
609 |
uint16_t USART_ReceiveData(USART_TypeDef* USARTx) |
610 |
{ |
611 |
/* Check the parameters */
|
612 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
613 |
|
614 |
/* Receive Data */
|
615 |
return (uint16_t)(USARTx->DR & (uint16_t)0x01FF); |
616 |
} |
617 |
|
618 |
/**
|
619 |
* @brief Transmits break characters.
|
620 |
* @param USARTx: Select the USART or the UART peripheral.
|
621 |
* This parameter can be one of the following values:
|
622 |
* USART1, USART2, USART3, UART4 or UART5.
|
623 |
* @retval None
|
624 |
*/
|
625 |
void USART_SendBreak(USART_TypeDef* USARTx)
|
626 |
{ |
627 |
/* Check the parameters */
|
628 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
629 |
|
630 |
/* Send break characters */
|
631 |
USARTx->CR1 |= CR1_SBK_Set; |
632 |
} |
633 |
|
634 |
/**
|
635 |
* @brief Sets the specified USART guard time.
|
636 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.
|
637 |
* @param USART_GuardTime: specifies the guard time.
|
638 |
* @note The guard time bits are not available for UART4 and UART5.
|
639 |
* @retval None
|
640 |
*/
|
641 |
void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
|
642 |
{ |
643 |
/* Check the parameters */
|
644 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
645 |
|
646 |
/* Clear the USART Guard time */
|
647 |
USARTx->GTPR &= GTPR_LSB_Mask; |
648 |
/* Set the USART guard time */
|
649 |
USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
|
650 |
} |
651 |
|
652 |
/**
|
653 |
* @brief Sets the system clock prescaler.
|
654 |
* @param USARTx: Select the USART or the UART peripheral.
|
655 |
* This parameter can be one of the following values:
|
656 |
* USART1, USART2, USART3, UART4 or UART5.
|
657 |
* @param USART_Prescaler: specifies the prescaler clock.
|
658 |
* @note The function is used for IrDA mode with UART4 and UART5.
|
659 |
* @retval None
|
660 |
*/
|
661 |
void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
|
662 |
{ |
663 |
/* Check the parameters */
|
664 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
665 |
|
666 |
/* Clear the USART prescaler */
|
667 |
USARTx->GTPR &= GTPR_MSB_Mask; |
668 |
/* Set the USART prescaler */
|
669 |
USARTx->GTPR |= USART_Prescaler; |
670 |
} |
671 |
|
672 |
/**
|
673 |
* @brief Enables or disables the USART?s Smart Card mode.
|
674 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.
|
675 |
* @param NewState: new state of the Smart Card mode.
|
676 |
* This parameter can be: ENABLE or DISABLE.
|
677 |
* @note The Smart Card mode is not available for UART4 and UART5.
|
678 |
* @retval None
|
679 |
*/
|
680 |
void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
681 |
{ |
682 |
/* Check the parameters */
|
683 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
684 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
685 |
if (NewState != DISABLE)
|
686 |
{ |
687 |
/* Enable the SC mode by setting the SCEN bit in the CR3 register */
|
688 |
USARTx->CR3 |= CR3_SCEN_Set; |
689 |
} |
690 |
else
|
691 |
{ |
692 |
/* Disable the SC mode by clearing the SCEN bit in the CR3 register */
|
693 |
USARTx->CR3 &= CR3_SCEN_Reset; |
694 |
} |
695 |
} |
696 |
|
697 |
/**
|
698 |
* @brief Enables or disables NACK transmission.
|
699 |
* @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.
|
700 |
* @param NewState: new state of the NACK transmission.
|
701 |
* This parameter can be: ENABLE or DISABLE.
|
702 |
* @note The Smart Card mode is not available for UART4 and UART5.
|
703 |
* @retval None
|
704 |
*/
|
705 |
void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
706 |
{ |
707 |
/* Check the parameters */
|
708 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
709 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
710 |
if (NewState != DISABLE)
|
711 |
{ |
712 |
/* Enable the NACK transmission by setting the NACK bit in the CR3 register */
|
713 |
USARTx->CR3 |= CR3_NACK_Set; |
714 |
} |
715 |
else
|
716 |
{ |
717 |
/* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
|
718 |
USARTx->CR3 &= CR3_NACK_Reset; |
719 |
} |
720 |
} |
721 |
|
722 |
/**
|
723 |
* @brief Enables or disables the USART?s Half Duplex communication.
|
724 |
* @param USARTx: Select the USART or the UART peripheral.
|
725 |
* This parameter can be one of the following values:
|
726 |
* USART1, USART2, USART3, UART4 or UART5.
|
727 |
* @param NewState: new state of the USART Communication.
|
728 |
* This parameter can be: ENABLE or DISABLE.
|
729 |
* @retval None
|
730 |
*/
|
731 |
void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
732 |
{ |
733 |
/* Check the parameters */
|
734 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
735 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
736 |
|
737 |
if (NewState != DISABLE)
|
738 |
{ |
739 |
/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
|
740 |
USARTx->CR3 |= CR3_HDSEL_Set; |
741 |
} |
742 |
else
|
743 |
{ |
744 |
/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
|
745 |
USARTx->CR3 &= CR3_HDSEL_Reset; |
746 |
} |
747 |
} |
748 |
|
749 |
|
750 |
/**
|
751 |
* @brief Enables or disables the USART's 8x oversampling mode.
|
752 |
* @param USARTx: Select the USART or the UART peripheral.
|
753 |
* This parameter can be one of the following values:
|
754 |
* USART1, USART2, USART3, UART4 or UART5.
|
755 |
* @param NewState: new state of the USART one bit sampling method.
|
756 |
* This parameter can be: ENABLE or DISABLE.
|
757 |
* @note
|
758 |
* This function has to be called before calling USART_Init()
|
759 |
* function in order to have correct baudrate Divider value.
|
760 |
* @retval None
|
761 |
*/
|
762 |
void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
763 |
{ |
764 |
/* Check the parameters */
|
765 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
766 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
767 |
|
768 |
if (NewState != DISABLE)
|
769 |
{ |
770 |
/* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
|
771 |
USARTx->CR1 |= CR1_OVER8_Set; |
772 |
} |
773 |
else
|
774 |
{ |
775 |
/* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
|
776 |
USARTx->CR1 &= CR1_OVER8_Reset; |
777 |
} |
778 |
} |
779 |
|
780 |
/**
|
781 |
* @brief Enables or disables the USART's one bit sampling method.
|
782 |
* @param USARTx: Select the USART or the UART peripheral.
|
783 |
* This parameter can be one of the following values:
|
784 |
* USART1, USART2, USART3, UART4 or UART5.
|
785 |
* @param NewState: new state of the USART one bit sampling method.
|
786 |
* This parameter can be: ENABLE or DISABLE.
|
787 |
* @retval None
|
788 |
*/
|
789 |
void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
790 |
{ |
791 |
/* Check the parameters */
|
792 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
793 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
794 |
|
795 |
if (NewState != DISABLE)
|
796 |
{ |
797 |
/* Enable the one bit method by setting the ONEBITE bit in the CR3 register */
|
798 |
USARTx->CR3 |= CR3_ONEBITE_Set; |
799 |
} |
800 |
else
|
801 |
{ |
802 |
/* Disable tthe one bit method by clearing the ONEBITE bit in the CR3 register */
|
803 |
USARTx->CR3 &= CR3_ONEBITE_Reset; |
804 |
} |
805 |
} |
806 |
|
807 |
/**
|
808 |
* @brief Configures the USART's IrDA interface.
|
809 |
* @param USARTx: Select the USART or the UART peripheral.
|
810 |
* This parameter can be one of the following values:
|
811 |
* USART1, USART2, USART3, UART4 or UART5.
|
812 |
* @param USART_IrDAMode: specifies the IrDA mode.
|
813 |
* This parameter can be one of the following values:
|
814 |
* @arg USART_IrDAMode_LowPower
|
815 |
* @arg USART_IrDAMode_Normal
|
816 |
* @retval None
|
817 |
*/
|
818 |
void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode)
|
819 |
{ |
820 |
/* Check the parameters */
|
821 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
822 |
assert_param(IS_USART_IRDA_MODE(USART_IrDAMode)); |
823 |
|
824 |
USARTx->CR3 &= CR3_IRLP_Mask; |
825 |
USARTx->CR3 |= USART_IrDAMode; |
826 |
} |
827 |
|
828 |
/**
|
829 |
* @brief Enables or disables the USART's IrDA interface.
|
830 |
* @param USARTx: Select the USART or the UART peripheral.
|
831 |
* This parameter can be one of the following values:
|
832 |
* USART1, USART2, USART3, UART4 or UART5.
|
833 |
* @param NewState: new state of the IrDA mode.
|
834 |
* This parameter can be: ENABLE or DISABLE.
|
835 |
* @retval None
|
836 |
*/
|
837 |
void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
838 |
{ |
839 |
/* Check the parameters */
|
840 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
841 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
842 |
|
843 |
if (NewState != DISABLE)
|
844 |
{ |
845 |
/* Enable the IrDA mode by setting the IREN bit in the CR3 register */
|
846 |
USARTx->CR3 |= CR3_IREN_Set; |
847 |
} |
848 |
else
|
849 |
{ |
850 |
/* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
|
851 |
USARTx->CR3 &= CR3_IREN_Reset; |
852 |
} |
853 |
} |
854 |
|
855 |
/**
|
856 |
* @brief Checks whether the specified USART flag is set or not.
|
857 |
* @param USARTx: Select the USART or the UART peripheral.
|
858 |
* This parameter can be one of the following values:
|
859 |
* USART1, USART2, USART3, UART4 or UART5.
|
860 |
* @param USART_FLAG: specifies the flag to check.
|
861 |
* This parameter can be one of the following values:
|
862 |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5)
|
863 |
* @arg USART_FLAG_LBD: LIN Break detection flag
|
864 |
* @arg USART_FLAG_TXE: Transmit data register empty flag
|
865 |
* @arg USART_FLAG_TC: Transmission Complete flag
|
866 |
* @arg USART_FLAG_RXNE: Receive data register not empty flag
|
867 |
* @arg USART_FLAG_IDLE: Idle Line detection flag
|
868 |
* @arg USART_FLAG_ORE: OverRun Error flag
|
869 |
* @arg USART_FLAG_NE: Noise Error flag
|
870 |
* @arg USART_FLAG_FE: Framing Error flag
|
871 |
* @arg USART_FLAG_PE: Parity Error flag
|
872 |
* @retval The new state of USART_FLAG (SET or RESET).
|
873 |
*/
|
874 |
FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
875 |
{ |
876 |
FlagStatus bitstatus = RESET; |
877 |
/* Check the parameters */
|
878 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
879 |
assert_param(IS_USART_FLAG(USART_FLAG)); |
880 |
/* The CTS flag is not available for UART4 and UART5 */
|
881 |
if (USART_FLAG == USART_FLAG_CTS)
|
882 |
{ |
883 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
884 |
} |
885 |
|
886 |
if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET)
|
887 |
{ |
888 |
bitstatus = SET; |
889 |
} |
890 |
else
|
891 |
{ |
892 |
bitstatus = RESET; |
893 |
} |
894 |
return bitstatus;
|
895 |
} |
896 |
|
897 |
/**
|
898 |
* @brief Clears the USARTx's pending flags.
|
899 |
* @param USARTx: Select the USART or the UART peripheral.
|
900 |
* This parameter can be one of the following values:
|
901 |
* USART1, USART2, USART3, UART4 or UART5.
|
902 |
* @param USART_FLAG: specifies the flag to clear.
|
903 |
* This parameter can be any combination of the following values:
|
904 |
* @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5).
|
905 |
* @arg USART_FLAG_LBD: LIN Break detection flag.
|
906 |
* @arg USART_FLAG_TC: Transmission Complete flag.
|
907 |
* @arg USART_FLAG_RXNE: Receive data register not empty flag.
|
908 |
*
|
909 |
* @note
|
910 |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun
|
911 |
* error) and IDLE (Idle line detected) flags are cleared by software
|
912 |
* sequence: a read operation to USART_SR register (USART_GetFlagStatus())
|
913 |
* followed by a read operation to USART_DR register (USART_ReceiveData()).
|
914 |
* - RXNE flag can be also cleared by a read to the USART_DR register
|
915 |
* (USART_ReceiveData()).
|
916 |
* - TC flag can be also cleared by software sequence: a read operation to
|
917 |
* USART_SR register (USART_GetFlagStatus()) followed by a write operation
|
918 |
* to USART_DR register (USART_SendData()).
|
919 |
* - TXE flag is cleared only by a write to the USART_DR register
|
920 |
* (USART_SendData()).
|
921 |
* @retval None
|
922 |
*/
|
923 |
void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG)
|
924 |
{ |
925 |
/* Check the parameters */
|
926 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
927 |
assert_param(IS_USART_CLEAR_FLAG(USART_FLAG)); |
928 |
/* The CTS flag is not available for UART4 and UART5 */
|
929 |
if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS)
|
930 |
{ |
931 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
932 |
} |
933 |
|
934 |
USARTx->SR = (uint16_t)~USART_FLAG; |
935 |
} |
936 |
|
937 |
/**
|
938 |
* @brief Checks whether the specified USART interrupt has occurred or not.
|
939 |
* @param USARTx: Select the USART or the UART peripheral.
|
940 |
* This parameter can be one of the following values:
|
941 |
* USART1, USART2, USART3, UART4 or UART5.
|
942 |
* @param USART_IT: specifies the USART interrupt source to check.
|
943 |
* This parameter can be one of the following values:
|
944 |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
|
945 |
* @arg USART_IT_LBD: LIN Break detection interrupt
|
946 |
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt
|
947 |
* @arg USART_IT_TC: Transmission complete interrupt
|
948 |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt
|
949 |
* @arg USART_IT_IDLE: Idle line detection interrupt
|
950 |
* @arg USART_IT_ORE: OverRun Error interrupt
|
951 |
* @arg USART_IT_NE: Noise Error interrupt
|
952 |
* @arg USART_IT_FE: Framing Error interrupt
|
953 |
* @arg USART_IT_PE: Parity Error interrupt
|
954 |
* @retval The new state of USART_IT (SET or RESET).
|
955 |
*/
|
956 |
ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT) |
957 |
{ |
958 |
uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00; |
959 |
ITStatus bitstatus = RESET; |
960 |
/* Check the parameters */
|
961 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
962 |
assert_param(IS_USART_GET_IT(USART_IT)); |
963 |
/* The CTS interrupt is not available for UART4 and UART5 */
|
964 |
if (USART_IT == USART_IT_CTS)
|
965 |
{ |
966 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
967 |
} |
968 |
|
969 |
/* Get the USART register index */
|
970 |
usartreg = (((uint8_t)USART_IT) >> 0x05);
|
971 |
/* Get the interrupt position */
|
972 |
itmask = USART_IT & IT_Mask; |
973 |
itmask = (uint32_t)0x01 << itmask;
|
974 |
|
975 |
if (usartreg == 0x01) /* The IT is in CR1 register */ |
976 |
{ |
977 |
itmask &= USARTx->CR1; |
978 |
} |
979 |
else if (usartreg == 0x02) /* The IT is in CR2 register */ |
980 |
{ |
981 |
itmask &= USARTx->CR2; |
982 |
} |
983 |
else /* The IT is in CR3 register */ |
984 |
{ |
985 |
itmask &= USARTx->CR3; |
986 |
} |
987 |
|
988 |
bitpos = USART_IT >> 0x08;
|
989 |
bitpos = (uint32_t)0x01 << bitpos;
|
990 |
bitpos &= USARTx->SR; |
991 |
if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
|
992 |
{ |
993 |
bitstatus = SET; |
994 |
} |
995 |
else
|
996 |
{ |
997 |
bitstatus = RESET; |
998 |
} |
999 |
|
1000 |
return bitstatus;
|
1001 |
} |
1002 |
|
1003 |
/**
|
1004 |
* @brief Clears the USARTx's interrupt pending bits.
|
1005 |
* @param USARTx: Select the USART or the UART peripheral.
|
1006 |
* This parameter can be one of the following values:
|
1007 |
* USART1, USART2, USART3, UART4 or UART5.
|
1008 |
* @param USART_IT: specifies the interrupt pending bit to clear.
|
1009 |
* This parameter can be one of the following values:
|
1010 |
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
|
1011 |
* @arg USART_IT_LBD: LIN Break detection interrupt
|
1012 |
* @arg USART_IT_TC: Transmission complete interrupt.
|
1013 |
* @arg USART_IT_RXNE: Receive Data register not empty interrupt.
|
1014 |
*
|
1015 |
* @note
|
1016 |
* - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun
|
1017 |
* error) and IDLE (Idle line detected) pending bits are cleared by
|
1018 |
* software sequence: a read operation to USART_SR register
|
1019 |
* (USART_GetITStatus()) followed by a read operation to USART_DR register
|
1020 |
* (USART_ReceiveData()).
|
1021 |
* - RXNE pending bit can be also cleared by a read to the USART_DR register
|
1022 |
* (USART_ReceiveData()).
|
1023 |
* - TC pending bit can be also cleared by software sequence: a read
|
1024 |
* operation to USART_SR register (USART_GetITStatus()) followed by a write
|
1025 |
* operation to USART_DR register (USART_SendData()).
|
1026 |
* - TXE pending bit is cleared only by a write to the USART_DR register
|
1027 |
* (USART_SendData()).
|
1028 |
* @retval None
|
1029 |
*/
|
1030 |
void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT)
|
1031 |
{ |
1032 |
uint16_t bitpos = 0x00, itmask = 0x00; |
1033 |
/* Check the parameters */
|
1034 |
assert_param(IS_USART_ALL_PERIPH(USARTx)); |
1035 |
assert_param(IS_USART_CLEAR_IT(USART_IT)); |
1036 |
/* The CTS interrupt is not available for UART4 and UART5 */
|
1037 |
if (USART_IT == USART_IT_CTS)
|
1038 |
{ |
1039 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
1040 |
} |
1041 |
|
1042 |
bitpos = USART_IT >> 0x08;
|
1043 |
itmask = ((uint16_t)0x01 << (uint16_t)bitpos);
|
1044 |
USARTx->SR = (uint16_t)~itmask; |
1045 |
} |
1046 |
/**
|
1047 |
* @}
|
1048 |
*/
|
1049 |
|
1050 |
/**
|
1051 |
* @}
|
1052 |
*/
|
1053 |
|
1054 |
/**
|
1055 |
* @}
|
1056 |
*/
|
1057 |
|
1058 |
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
|