I2S Firmware Driver Api Description; How To Use This Driver - ST STM32F2 User Manual

UM1940
__IO uint32_t ErrorCode
Field Documentation
SPI_TypeDef* I2S_HandleTypeDef::Instance
I2S_InitTypeDef I2S_HandleTypeDef::Init
uint16_t* I2S_HandleTypeDef::pTxBuffPtr
__IO uint16_t I2S_HandleTypeDef::TxXferSize
__IO uint16_t I2S_HandleTypeDef::TxXferCount
uint16_t* I2S_HandleTypeDef::pRxBuffPtr
__IO uint16_t I2S_HandleTypeDef::RxXferSize
__IO uint16_t I2S_HandleTypeDef::RxXferCount
DMA_HandleTypeDef* I2S_HandleTypeDef::hdmatx
DMA_HandleTypeDef* I2S_HandleTypeDef::hdmarx
__IO HAL_LockTypeDef I2S_HandleTypeDef::Lock
__IO HAL_I2S_StateTypeDef I2S_HandleTypeDef::State
__IO uint32_t I2S_HandleTypeDef::ErrorCode
25.2

I2S Firmware driver API description

25.2.1

How to use this driver

The I2S HAL driver can be used as follow:
1. Declare a I2S_HandleTypeDef handle structure.
2. Initialize the I2S low level resources by implement the HAL_I2S_MspInit() API:
a.
b.
c.
d.
3. Program the Mode, Standard, Data Format, MCLK Output, Audio frequency and
Polarity using HAL_I2S_Init() function. The specific I2S interrupts (Transmission
complete interrupt, RXNE interrupt and Error Interrupts) will be managed using the
macros __I2S_ENABLE_IT() and __I2S_DISABLE_IT() inside the transmit and
receive process. Make sure that either: I2S PLL is configured or External clock source
is configured after setting correctly the define constant EXTERNAL_CLOCK_VALUE
in the stm32f2xx_hal_conf.h file.
4. Three operation modes are available within this driver :
Polling mode IO operation
Send an amount of data in blocking mode using HAL_I2S_Transmit()
Enable the SPIx interface clock.
I2S pins configuration:
Enable the clock for the I2S GPIOs.
Configure these I2S pins as alternate function pull-up.
NVIC configuration if you need to use interrupt process (HAL_I2S_Transmit_IT()
and HAL_I2S_Receive_IT() APIs).
Configure the I2Sx interrupt priority.
Enable the NVIC I2S IRQ handle.
DMA Configuration if you need to use DMA process (HAL_I2S_Transmit_DMA()
and HAL_I2S_Receive_DMA() 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 I2S DMA Tx/Rx handle.
Configure the priority and enable the NVIC for the transfer complete interrupt
on the DMA Tx/Rx Stream.
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HAL I2S Generic Driver
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