amiro-blt / Target / Modules / LightRing_1-2 / Boot / lib / STM32F10x_StdPeriph_Driver / src / stm32f10x_usart.c @ fc7151bb
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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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{
|
| 399 |
assert_param(IS_USART_123_PERIPH(USARTx)); |
| 400 |
} |
| 401 |
|
| 402 |
usartxbase = (uint32_t)USARTx; |
| 403 |
|
| 404 |
/* Get the USART register index */
|
| 405 |
usartreg = (((uint8_t)USART_IT) >> 0x05);
|
| 406 |
|
| 407 |
/* Get the interrupt position */
|
| 408 |
itpos = USART_IT & IT_Mask; |
| 409 |
itmask = (((uint32_t)0x01) << itpos);
|
| 410 |
|
| 411 |
if (usartreg == 0x01) /* The IT is in CR1 register */ |
| 412 |
{
|
| 413 |
usartxbase += 0x0C;
|
| 414 |
} |
| 415 |
else if (usartreg == 0x02) /* The IT is in CR2 register */ |
| 416 |
{
|
| 417 |
usartxbase += 0x10;
|
| 418 |
} |
| 419 |
else /* The IT is in CR3 register */ |
| 420 |
{
|
| 421 |
usartxbase += 0x14;
|
| 422 |
} |
| 423 |
if (NewState != DISABLE)
|
| 424 |
{
|
| 425 |
*(__IO uint32_t*)usartxbase |= itmask; |
| 426 |
} |
| 427 |
else
|
| 428 |
{
|
| 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****/
|