UART

[AhmedRiad]

Hello NXP , 
I'm using EVK S32K118-64
For LPUART0 
Tx is working fine (Tested the Pin itself on the board for example PTB1 and read the Tx frame sent from the EVK using oscilloscope )
but Rx pins doesn't detect UART frames .

my question here is related to the EVK schematic for LPUART0, is LPUART0 RX pins are connected to Open-SDA debug interface by default and I can't use the LPUART0 pins on the S32K118 (PTB0 ,PTC2,PTA2)?

is there a jumper I need to remove , to be able to use Rx LPUART0 pins (PTB0 ,PTC2,PTA2)? 

Thanks in advance.

[AhmedRiad]

hi PetrS , 
Issue solved ,thank you 

[sbusc]

Hi Ahmed what is the finally solution ? Thank you in advance

[AhmedRiad]

Hello PetrS, 
Thanks for your reply, I have now LPUART0-Tx (PTB1) Pin connected with LPUART0-RX (PTC2) Pin. (HW connection)
I was trying to test UART RX pin by sending TX uart frames from PTB1
using EB Tresos plugins for uart  I use the following : 
Uart_SyncSend to send UART frames  (API returns E_OK ) (Actual uart messages are sent on PTB1)
Uart_SyncReceive to receive UART frames after calling Uart_SyncSend  ( API always timeout , and returns E_NOT_OK )

[PetrS]

Hi,

I do not know this HLD driver much but try first call Uart_AsyncReceive and then Uart_SyncSend.

BR, Petr

[AhmedRiad]

Hi ,
Thanks for your reply , if I used  openSDA JTAG (Connected a debugger) instead of using OPenSDA USB with Design stuido ,will I be able to use PTB0 ?

[PetrS]

Hi,

as the OpenSDA MCU drives through level shifter this PTB0 pin, then you cannot connect another output signal to it, or configure PTB0 as output, unless you remove R24 or R666.

BR, Petr

[PetrS]

Hi,

yes, PTB0 is directly connected to OpenSDA UART interface via R24&R666 zero ohms resistors.
If you want to use LPUART RX function on different pins do not configure PTB0 for LPUART RX but rather config different pin, either PTC2 or PTA2.

BR, Petr