topic LPC55S1x Coremark software package in LPC Microcontrollers

LPC55S1x Coremark software package

mevellea — Tue, 08 Jun 2021 08:04:57 GMT

Hello,

The application note AN13072 - LPC55S1x/LPC551x CoreMark Porting Guide is mentioning a "software package associated with this application note" which can be merged with the reference CoreMark library.

I couldn't find any reference to this software package on NXP portal or SDK builder, can you please point me to its download location ?

Thanks.

Armel

Re: LPC55S1x Coremark software package

ZhangJennie — Wed, 09 Jun 2021 03:43:34 GMT

HI mevellea

Sorry for the inconvenience. The system has issue. I have reported.

Please see attached SW package.

Hope this helps,

Jun Zhang

Re: LPC55S1x Coremark software package

mevellea — Mon, 14 Jun 2021 13:52:07 GMT

Hello,

Thanks for sharing this package, I have some additional questions since I am having some issues confirming the results from the Application Note. The package was built for target LPC55S69, instead of target LPC55S16: it goes with AN12284, not AN13072.

Do you have a software package for target LPC55S1x instead?

When running the app lpc55Sxx_coremark_mdk with default settings from this package on a board LPC55S69, I get a score which is lower than described in the UM:

run_in_flash_96mhz: I get a score of 1.92, instead of 2.33 (-20% vs. AN12284)
run_in_flash_12mhz: I get a score of 3.25, instead of 3.6 (-10% vs. product datasheet LPC55S6x)

How do you explain this difference ?

SystemCoreClock: 96000000
System Running on FLASH
2K performance run parameters for coremark.
CoreMark Size : 666
Total ticks : 10862
Total time (secs): 10.862000
Iterations/Sec : 184.128153
Iterations : 2000
Compiler version : MDK v5.26
Compiler flags : -O3 -Otime --cpu Cortex-M33.fp --apcs=interwork
Memory location : STACK
seedcrc : 0xe9f5
[0]crclist : 0xe714
[0]crcmatrix : 0x1fd7
[0]crcstate : 0x8e3a
[0]crcfinal : 0x4983
Correct operation validated. See README.md for run and reporting rules.
CoreMark 1.0 : 184.128153 / MDK v5.26 -O3 -Otime --cpu Cortex-M33.fp --apcs=interwork / STACK
DONE
=> Score: 184.13 / 96MHZ = 1.92

Re: LPC55S1x Coremark software package

ZhangJennie — Fri, 09 Jul 2021 03:00:20 GMT

Our support system delayed this message and I saw it quite this morning.

I checked the AN author, the AN number is wrong. They said they would check the web master. But the AN file I sent you is for the AN you asked.

I didn't get other code files beside this one. I sent you internal community message as well.

Have a nice day!

Jun Zhang