topic Re: init_flash_memory() - takes too long in Kinetis Software Development Kit

init_flash_memory() - takes too long

gauravbanyal — Mon, 09 Jan 2017 15:26:09 GMT

Hello,

I took the function init_flash_memory() from one of the SDK2.0 examples for the FRDM-KL03 kit.

I have this function called in the initialization. In my design, the MCU sleeps in VLLS3 and wakes up and reads a line, does something based on that and sleeps again in VLLS3.

Problem is:

I was trying to pofile the code. I noticed that init_flash_memory() takes 127ms to execute and in that time, I miss the signal on the line that I want to capture.

Any idea on why it takes so long and how I can avoid it?

Thanks.

Re: init_flash_memory() - takes too long

kerryzhou — Tue, 10 Jan 2017 04:24:14 GMT

Hi Gaurav Banyal,

Please give me a picture about init_flash_memory() function in the SDK2.0_FRDM-KL03.

I check SDK2.0_FRDM-KL03, just find the status_t FLASH_Init(flash_config_t *config) function.

Please check your init_flash_memory() function , what the code in this function. You can delete the not important code to cut down the execute time.

Have a great day,
Kerry

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Re: init_flash_memory() - takes too long

gauravbanyal — Tue, 10 Jan 2017 11:16:58 GMT

Hello Kerry Zhou,

Sorry about this mistake. The procedure init_flash_memory() is indeed something I have created. This encapsulates much of what is in the initialization in the example SDK_2.0_FRDM-KL03Z\boards\frdmkl03z\driver_examples\flash\pflash.

Below is my function. Could you please suggest what is the not-important code that can be removed?

Good day to you too!

Thanks,

Gaurav.

Re: init_flash_memory() - takes too long

kerryzhou — Wed, 11 Jan 2017 01:25:29 GMT

Hi Gaurav Banyal,

Please comment all the code in the red rectangle:

Then try again, in your code, PRINTF will caused a lot of time.

Wish it helps you!

Have a great day,
Kerry