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S32K146 LPUART Start bit

Question asked by Raul Castanon on Apr 10, 2018
Latest reply on Apr 12, 2018 by Jiri Kral

Hello,

 

I'm using a development board S32K146 and working with the LPUART, i did the configuration using the SDK 8.5.
The configuration is:

Baud rate: 2400

Parity: even
Stop bits: 2

Data: 8 bits

8 bit data + 2 stop bits + 1 parity bit + 1 start bit

 

The communication is working using a terminal and a TTL cable. I watch the trace using an oscilloscope and a saw that there is something incorrect in the frame.
As message I've sent two 'A'->"01000001" this will throw a 0 as even parity bit.

As we can see in the image, I'm missing a bit in the trace and I think this will be the start bit

 

Using the reference manual I don't see any register where I can enable the start bit, neither in the SDK window on the S32DS.

 

Someone knows how to enable the start bit in the trace?

 

Thanks in advance

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