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STM32MP135 LIN master on Linux: How to send the 13 bit break signal?

ac1dg
Visitor

‎2024-12-11 12:32 AM

Hi,

I am trying to write a LIN master for STM32MP135 running a Yocto Linux. Currently, I am struggling with the break signal. According to the LIN specification, it has to be at least 13 (up to 20) bits long. The device I am trying to talk to is using 9600 baud and the break signal is 1340μs there:

ac1dg_0-1733905399822.png

A LIN tranceiver is connected to USART1 on my board. How can I send the correct break signal on USART1 on Linux?

Thank you in advance!

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