How to retrieve data via the SAI of the STM32

[DYann.1]

HI,

After having configured the SAI PORT of the STM32L5 to communicate with a CODEC do you know how to recover the data ?

Thank for your helps

Regards

[waclawek.jan]

Received data are in the SAI FIFO, read through SAI_xDR registers. Normally SAI is read by DMA, but while experimenting, you can handle it by polling, too. See Internal FIFOs subchapter of SAI chapter in RM.

JW

[DYann.1]

Hi,

First I open the example with the evaluation kit STM32L552E-EV, the file SAI Audio Play. But I need to read information from a sensor and not a pre-record.

After after configuring the SAI PORT with CubeMX, I don't know how to read samples.

You say

Do you have the code so that I can concretely see how it works ? You says in RM what does that mean ?

Thank you

[AScha.3]

RM = reference manual ( download from STM )

+

example code - see

https://github.com/STMicroelectronics/STM32CubeL5/tree/master/Projects/STM32L552E-EV/Examples/SAI/SAI_AudioPlay

to read, use : HAL_SAI_Receive(SAI...) or HAL_SAI_Receive_DMA() , read in HAL lib .

[DYann.1]

Hi,

I have this example in my IDE environment

And I can see the function :

HAL_StatusTypeDef HAL_SAI_Receive(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size, uint32_t Timeout)

In this example SAI_AudioPlay it's not the same thing i'm looking for. First I don't have the same CODEC and I just need to acquire the data via an input from the CODEC that's all.