topic Re: S32K312 LPUART Rx FIFO buffer in S32K

S32K312 LPUART Rx FIFO buffer

mirkop345 — Fri, 29 Nov 2024 16:35:46 GMT

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?

Re: S32K312 LPUART Rx FIFO buffer

Senlent — Mon, 02 Dec 2024 06:03:27 GMT

Hi@mirkop345

You can find the following figure in the data sheet.

The size of the RX FIFO is limted.

Re: S32K312 LPUART Rx FIFO buffer

mirkop345 — Mon, 02 Dec 2024 21:04:27 GMT

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?

Re: S32K312 LPUART Rx FIFO buffer

Senlent — Tue, 03 Dec 2024 01:46:54 GMT

Hi@mirkop345

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