topic kinetis mmcau performance in Kinetis Microcontrollers

kinetis mmcau performance

bradwalker — Thu, 13 Mar 2014 23:01:33 GMT

I have looked at the Kinetis MMCAU application notes and software library. I have taken the software library and created a couple of software drivers in uCLunix that use these functions.

Everything is working correctly.

But, I'm curious to know about performance.. I have no reference for what the actual hardware should be capable of. I'm getting throughtput of about 2.5 MB/sec on a AES12-CBC cipher mode.

Is the MMCAU capable of going faster? Or am I starting to bump up against the throughput of the chip.

Thanks.

-brad walker

Re: kinetis mmcau performance

shaiknisar — Wed, 08 Jan 2020 07:23:22 GMT

Hey Hi bradwalker‌ I'm trying to use the API's provided for DES-ECB mode. For encryption i'm trying to use "cau_des_encrypt" API , but upon executing the API the software runs into hardfault. The following is the setup-

:smileyplus: IAR IDE,

:smileyplus: unsigned char Des_Ip_array[8] = "helloboy";

:smileyplus: unsigned char Des_Op_array[8];

:smileyplus: unsigned char Key[8] = "password";

:smileyplus: cau_des_encrypt(Des_Ip_array,Key,Des_Op);

Re: kinetis mmcau performance

mjbcswitzerland — Thu, 09 Jan 2020 00:49:22 GMT

I have some performance comparisons of AES256 on a few Kinetis parts with different SW libraries and HW accelerators in
http://www.utasker.com/docs/uTasker/uTasker_Cryptography.pdf

Maybe there is some info that could be of use (?)

Regards

Mark

(uTasker project developer for Kinetis and i.MX RT)

Re: kinetis mmcau performance

mjbcswitzerland — Thu, 09 Jan 2020 00:52:25 GMT

If you are using HW accelerators they tend to need data aligned on long word boundaries - could that be your issue?
Or, are you sure you have enabled clocks to such parts being used?

Regards

Mark

[uTasker project developer for Kinetis and i.MX RT]

Re: kinetis mmcau performance

shaiknisar — Thu, 09 Jan 2020 07:22:01 GMT

Hey Hi @Mark Buthcer, thank you for the reply.

I'm working with MKM34Z256VLL7 controller. I have referred to the example code provided by the NXP for the mmCAU module, and i'm trying to replicate the same.

=> I'm trying to use the TDES API provided in the example code. For this i've created a new IAR Build and tried to replicate the way it is done in the example code.

=> The problem here i face is that the moment i try to execute the 'cau_des_encrypt' API it triggers 'Hard Fault'. Can you please help me resolving this. I have been trying to resolve this since a week.

NOTE: I have added the IAR Build.

Re: kinetis mmcau performance

shaiknisar — Thu, 09 Jan 2020 07:26:29 GMT

I have created a query on the same, here you can find the build i was referring to.

https://community.nxp.com/thread/521799