stm32f7xx_hal_usart.c File Reference

USART HAL module driver. This file provides firmware functions to manage the following functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter Peripheral (USART). More...

#include "stm32f7xx_hal.h"

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Detailed Description

USART HAL module driver. This file provides firmware functions to manage the following functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter Peripheral (USART).

Author

MCD Application Team

Version

V1.1.0

Date

22-April-2016

• Initialization and de-initialization functions
• IO operation functions
• Peripheral Control functions

 ===============================================================================
                       ##### How to use this driver #####
===============================================================================
   [..]
     The USART HAL driver can be used as follows:

     (#) Declare a USART_HandleTypeDef handle structure.
     (#) Initialize the USART low level resources by implement the HAL_USART_MspInit ()API:
         (##) Enable the USARTx interface clock.
         (##) USART pins configuration:
           (+++) Enable the clock for the USART GPIOs.
           (+++) Configure these USART pins as alternate function pull-up.
         (##) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),
               HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
           (+++) Configure the USARTx interrupt priority.
           (+++) Enable the NVIC USART IRQ handle.
           (+++) The specific USART interrupts (Transmission complete interrupt, 
                 RXNE interrupt and Error Interrupts) will be managed using the macros
                 __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.
         (##) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()
              HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
           (+++) Declare a DMA handle structure for the Tx/Rx stream.
           (+++) Enable the DMAx interface clock.
           (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.                
           (+++) Configure the DMA Tx/Rx Stream.
           (+++) Associate the initialized DMA handle to the USART DMA Tx/Rx handle.
           (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx Stream.

     (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware 
         flow control and Mode(Receiver/Transmitter) in the husart Init structure.

     (#) Initialize the USART registers by calling the HAL_USART_Init() API:
         (++) These API's configures also the low level Hardware (GPIO, CLOCK, CORTEX...etc)
              by calling the customed HAL_USART_MspInit(&husart) API.

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Definition in file stm32f7xx_hal_usart.c.