LPC Microcontrollers中的主题 Re: LPC55s6x Internal Temperature Sensor conversion formula

LPC55s6x Internal Temperature Sensor conversion formula

cliff_baron — Wed, 20 Mar 2019 21:01:03 GMT

Hi,

Does anyone know if there is a sample project available for the LPC55s6x for reading the internal temperature sensor?

I have modified the lpadc_polling example based on the notes in the Users Guide section 40.7.6 and I am getting raw values back from the FIFO. The problem is the conversion formula supplied is missing pertantant information needed to implement the conversion. See below. No values are given for A, B or alpha.

Thanks,

Cliff

To convert the two temperature sensor conversion results to the on-chip temperature
value:
1. Read the two temperature sensor conversion results from the FIFO designated by
TCTRLT[FIFO_SEL_A].
2. The first result written by the temperature sensor command will be called delVds. The
second result is called Vds
3. An equation can be used to convert from these results into the final temperature
sensor reading: A*(alpha * delVds / (Vds + alpha * delVds)) + B

Re: LPC55s6x Internal Temperature Sensor conversion formula

ZhangJennie — Fri, 22 Mar 2019 03:28:54 GMT

Hi Clifford Baron

I just checked, you are right the temperature sensor parameters are incomplete.

I just contact LPC application team for this issue.

I will keep you informed.

Have a nice day,

Jun Zhang

Re: LPC55s6x Internal Temperature Sensor conversion formula

cliff_baron — Tue, 02 Apr 2019 18:10:59 GMT

Hi Jun Zhang

Have you received any updates from the LPC applications team concerning the temperature calculation formula?

Thanks,

Cliff

Re: LPC55s6x Internal Temperature Sensor conversion formula

ZhangJennie — Wed, 03 Apr 2019 02:30:21 GMT

No yet. I will expedite it.

Re: LPC55s6x Internal Temperature Sensor conversion formula

ZhangJennie — Wed, 03 Apr 2019 07:02:48 GMT

Hi Clifford Baron

Those data are still under characterization, not available for public. Roughly, we should have it in 1 month.

If you are urgent, Could you please let us know the target application so that our PL can prioritize the work?

If you don't want to talk your project in public, you can create a private case and assign it to Jennie Zhang. I will check it.

Have a great day,
Jun Zhang

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Re: LPC55s6x Internal Temperature Sensor conversion formula

r_strassburg — Mon, 20 May 2019 11:25:39 GMT

Are the constants for this formula available yet?

Re: LPC55s6x Internal Temperature Sensor conversion formula

ZhangJennie — Thu, 23 May 2019 03:08:06 GMT

I checked with design, but no reply yet. I will let you know if i get any.

Jun Zhang