This file provides firmware functions to manage the following functionalities of the Universal synchronous asynchronous receiver transmitter (USART): More...

#include "stm32f4xx_usart.h"
#include "stm32f4xx_rcc.h"

Include dependency graph for stm32f4xx_usart.c:

Go to the source code of this file.

Macros
#define	CR1_CLEAR_MASK

#define	CR2_CLOCK_CLEAR_MASK

#define	CR3_CLEAR_MASK ((uint16_t)(USART_CR3_RTSE \| USART_CR3_CTSE))

#define	IT_MASK ((uint16_t)0x001F)

Functions
void	USART_DeInit (USART_TypeDef *USARTx)
	Deinitializes the USARTx peripheral registers to their default reset values. More...

void	USART_Init (USART_TypeDef USARTx, USART_InitTypeDef USART_InitStruct)
	Initializes the USARTx peripheral according to the specified parameters in the USART_InitStruct . More...

void	USART_StructInit (USART_InitTypeDef *USART_InitStruct)
	Fills each USART_InitStruct member with its default value. More...

void	USART_ClockInit (USART_TypeDef USARTx, USART_ClockInitTypeDef USART_ClockInitStruct)
	Initializes the USARTx peripheral Clock according to the specified parameters in the USART_ClockInitStruct . More...

void	USART_ClockStructInit (USART_ClockInitTypeDef *USART_ClockInitStruct)
	Fills each USART_ClockInitStruct member with its default value. More...

void	USART_Cmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the specified USART peripheral. More...

void	USART_SetPrescaler (USART_TypeDef *USARTx, uint8_t USART_Prescaler)
	Sets the system clock prescaler. More...

void	USART_OverSampling8Cmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's 8x oversampling mode. More...

void	USART_OneBitMethodCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's one bit sampling method. More...

void	USART_SendData (USART_TypeDef *USARTx, uint16_t Data)
	Transmits single data through the USARTx peripheral. More...

uint16_t	USART_ReceiveData (USART_TypeDef *USARTx)
	Returns the most recent received data by the USARTx peripheral. More...

void	USART_SetAddress (USART_TypeDef *USARTx, uint8_t USART_Address)
	Sets the address of the USART node. More...

void	USART_ReceiverWakeUpCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Determines if the USART is in mute mode or not. More...

void	USART_WakeUpConfig (USART_TypeDef *USARTx, uint16_t USART_WakeUp)
	Selects the USART WakeUp method. More...

void	USART_LINBreakDetectLengthConfig (USART_TypeDef *USARTx, uint16_t USART_LINBreakDetectLength)
	Sets the USART LIN Break detection length. More...

void	USART_LINCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's LIN mode. More...

void	USART_SendBreak (USART_TypeDef *USARTx)
	Transmits break characters. More...

void	USART_HalfDuplexCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's Half Duplex communication. More...

void	USART_SetGuardTime (USART_TypeDef *USARTx, uint8_t USART_GuardTime)
	Sets the specified USART guard time. More...

void	USART_SmartCardCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's Smart Card mode. More...

void	USART_SmartCardNACKCmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables NACK transmission. More...

void	USART_IrDAConfig (USART_TypeDef *USARTx, uint16_t USART_IrDAMode)
	Configures the USART's IrDA interface. More...

void	USART_IrDACmd (USART_TypeDef *USARTx, FunctionalState NewState)
	Enables or disables the USART's IrDA interface. More...

void	USART_DMACmd (USART_TypeDef *USARTx, uint16_t USART_DMAReq, FunctionalState NewState)
	Enables or disables the USART's DMA interface. More...

void	USART_ITConfig (USART_TypeDef *USARTx, uint16_t USART_IT, FunctionalState NewState)
	Enables or disables the specified USART interrupts. More...

FlagStatus	USART_GetFlagStatus (USART_TypeDef *USARTx, uint16_t USART_FLAG)
	Checks whether the specified USART flag is set or not. More...

void	USART_ClearFlag (USART_TypeDef *USARTx, uint16_t USART_FLAG)
	Clears the USARTx's pending flags. More...

ITStatus	USART_GetITStatus (USART_TypeDef *USARTx, uint16_t USART_IT)
	Checks whether the specified USART interrupt has occurred or not. More...

void	USART_ClearITPendingBit (USART_TypeDef *USARTx, uint16_t USART_IT)
	Clears the USARTx's interrupt pending bits. More...

Detailed Description

This file provides firmware functions to manage the following functionalities of the Universal synchronous asynchronous receiver transmitter (USART):

Author: MCD Application Team

Version: V1.3.0

Date

08-November-2013

Initialization and Configuration
Data transfers
Multi-Processor Communication
LIN mode
Half-duplex mode
Smartcard mode
IrDA mode
DMA transfers management
Interrupts and flags management

===============================================================================
                       ##### How to use this driver #####
===============================================================================
   [..]
     (#) Enable peripheral clock using the following functions
         RCC_APB2PeriphClockCmd(RCC_APB2Periph_USARTx, ENABLE) for USART1 and USART6 
         RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE) for USART2, USART3, 
         UART4 or UART5.
 
     (#) According to the USART mode, enable the GPIO clocks using 
         RCC_AHB1PeriphClockCmd() function. (The I/O can be TX, RX, CTS, 
         or/and SCLK). 
 
     (#) Peripheral's alternate function: 
       (++) Connect the pin to the desired peripherals' Alternate 
           Function (AF) using GPIO_PinAFConfig() function
       (++) Configure the desired pin in alternate function by:
           GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
       (++) Select the type, pull-up/pull-down and output speed via 
           GPIO_PuPd, GPIO_OType and GPIO_Speed members
       (++) Call GPIO_Init() function
         
     (#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware 
         flow control and Mode(Receiver/Transmitter) using the USART_Init()
         function.
 
     (#) For synchronous mode, enable the clock and program the polarity,
         phase and last bit using the USART_ClockInit() function.
 
     (#) Enable the NVIC and the corresponding interrupt using the function 
        USART_ITConfig() if you need to use interrupt mode. 
 
     (#) When using the DMA mode 
       (++) Configure the DMA using DMA_Init() function
       (++) Active the needed channel Request using USART_DMACmd() function
  
     (#) Enable the USART using the USART_Cmd() function.
  
     (#) Enable the DMA using the DMA_Cmd() function, when using DMA mode. 
   
     -@- Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections
         for more details
   
   [..]        
   In order to reach higher communication baudrates, it is possible to
   enable the oversampling by 8 mode using the function USART_OverSampling8Cmd().
   This function should be called after enabling the USART clock (RCC_APBxPeriphClockCmd())
   and before calling the function USART_Init().

Attention

Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); You may not use this file except in compliance with the License. You may obtain a copy of the License at:

   http://www.st.com/software_license_agreement_liberty_v2

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Definition in file stm32f4xx_usart.c.

Macros

Functions

Detailed Description

© COPYRIGHT 2013 STMicroelectronics