25.2.2 Initialization and de-initialization functions
This subsection provides a set of functions allowing to initialize and de-initialize the I2Sx
peripheral in simplex mode:
User must Implement HAL_I2S_MspInit() function in which he configures all related
peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ).
Call the function HAL_I2S_Init() to configure the selected device with the selected
configuration:
Mode
Standard
Data Format
MCLK Output
Audio frequency
Polarity
Call the function HAL_I2S_DeInit() to restore the default configuration of the selected
I2Sx peripheral.
This section contains the following APIs:
HAL_I2S_Init()
HAL_I2S_DeInit()
HAL_I2S_MspInit()
HAL_I2S_MspDeInit()
25.2.3 IO operation functions
This subsection provides a set of functions allowing to manage the I2S data transfers.
1. There are two modes of transfer:
Blocking mode : The communication is performed in the polling mode. The status
of all data processing is returned by the same function after finishing transfer.
No-Blocking mode : The communication is performed using Interrupts or DMA.
These functions return the status of the transfer startup. The end of the data
processing will be indicated through the dedicated I2S IRQ when using Interrupt
mode or the DMA IRQ when using DMA mode.
2. Blocking mode functions are :
HAL_I2S_Transmit()
HAL_I2S_Receive()
3. No-Blocking mode functions with Interrupt are :
HAL_I2S_Transmit_IT()
HAL_I2S_Receive_IT()
4. No-Blocking mode functions with DMA are :
HAL_I2S_Transmit_DMA()
HAL_I2S_Receive_DMA()
5. A set of Transfer Complete Callbacks are provided in non Blocking mode:
HAL_I2S_TxCpltCallback()
HAL_I2S_RxCpltCallback()
HAL_I2S_ErrorCallback()
This section contains the following APIs:
HAL_I2S_Transmit()
HAL_I2S_Receive()
HAL_I2S_Transmit_IT()
HAL_I2S_Receive_IT()
HAL_I2S_Transmit_DMA()
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