Use UART1 Tx and Rx pins instead of SDA

[DemaQasem]

Hello,

I am trying to send data over UART1 using the s32k144 evb (it is connected to my PC via OpenSDA), I tried to run the built-in LPUART example and it worked <the data were sent via the OpenSDA connection> 

I tried to connect the pins PTC7 and PTC6 to RS232 but it did not send any data.

is there any additional configuration needed to use the pins instead?

Thank You.

[Robin_Shen · Accepted solution]

Hi

Please do not connect S32K LPUART pins directly to RS232 signals. You need an RS232 to TTL converter.

Best Regards,
Robin
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[DemaQasem]

Already tried that, but still, no data was present.

[Robin_Shen]

Can you observe the waveform sent by the PTC7 pin through a logic analyzer or an oscilloscope?

[DemaQasem]

Thank you Mr.Robin it worked.

looks like the Rx & Tx connections of the TTL converter were not in the correct order.

Regards, 

Dema.