How to use FlexIO configuration to SENT(SAE-J2716)

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How to use FlexIO configuration to SENT(SAE-J2716)

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keanchen
Contributor II

Official examples configure FLEXIO based on SPI and other serial protocols. SENT protocol needs to parse the length of time. How to configure FLEXIO  to parse SENT protocol?

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FelipeGarcia
NXP Employee
NXP Employee

Hi Kean,

Could you please tell me which MCU are you working on?

Best regards,

Felipe

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keanchen
Contributor II

S32K144, I want to using FlexIO parsing SENT signal of TAS sensor for EPS system

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FelipeGarcia
NXP Employee
NXP Employee

Hi Kean,

 

If what you are trying to accomplish is a SENT transmitter, FlexIO can theoretically generate SENT frames by using "Dual 8-bit counters PWM mode" with fixed low period and varying high period depending on the nibble value.

 

On the other hand, if you are trying to make a receiver, FlexIO won't work for you because it doesn't have "input capture" capability.  You will need to use FlexTimer or LPTimer to measure each of pulse width.


Have a great day,
Felipe

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keanchen
Contributor II

thanks,Using MCAL to Configure S32K ICU to receive SENT?

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FelipeGarcia
NXP Employee
NXP Employee

Hi Kean,

I recommend you to create a different thread for your specific question in the https://community.nxp.com/community/s32/s32k community, as this space is specialized in Kinetis devices.

Best regards,

Felipe

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