S32K312 LPUART Rx FIFO buffer

[mirkop345]

If LPUART ISR is enabled with default FIFO and AUTOSAR then max 10kbps communication is possible otherwise Rx buffer overrun happens due to AUTOSAR overhead. I assume enabling FIFO buffer depth this issue will be solved and higher data tares would be possible.

I am wondering how I can  change in RTD or MCAL settings for Rx FIFO depth?

[mirkop345]

I was wondering if this setting for FIFO buffer depth  is accessible  in MCAL or RTD libraries? As per AUTOSAR I can not access any MCU register directly but rather via access function?

[Senlent]

Hi@mirkop345

The RX FIFO depth of Lpuart is fixed and cannot be set by the user.

[Senlent]

Hi@mirkop345

You can find the following figure in the data sheet.

The size of the RX FIFO is limted.