topic Re: s32k344 Clock settings in S32K

s32k344 Clock settings

AhmadTurkmani — Mon, 21 Aug 2023 13:41:52 GMT

hi, im using s32k344, im trying to build a simple project to toggle a led and use timer as my delay.

i have included GPT as a peripheral and configured the settings of it using gpt_example as a reference, after that i added a clock and gave it 40MHZ as shown below

now im able to toggle the led but the timer on it is not 1 second although i used this function Gpt_StartTimer(GptConf_GptChannelConfiguration_GptChannelConfiguration_0, 40000000);

my channel tick frequency is also 40MHZ .

i used the function Mcu_GetClockFrequency(PIT0_CLK); to look at the frequency of the clock i got it as 12MHZ.

this is my clocks diagram :

im also sharing my code , can you please help me with this issue.

thanks.

Re: s32k344 Clock settings

VaneB — Tue, 22 Aug 2023 21:12:45 GMT

Hi @AhmadTurkmani

The configuration of the PIT looks correct.

Could you help me by running the Gpt_Example_S32K344 and tell me if you observe the same behavior? Additionally, could you tell me if you are using a custom board?

B.R.

VaneB

Re: s32k344 Clock settings

AhmadTurkmani — Wed, 23 Aug 2023 05:28:30 GMT

Hi @VaneB thanks for replying. Yes im using a custom board , i have another code which works properly on it ( so i dont think its a hardware issue ) , also trying the GPT example code works perfectly.

Re: s32k344 Clock settings

VaneB — Wed, 23 Aug 2023 22:30:03 GMT

Hi @AhmadTurkmani

As it is not a HW issue, I suggest you make sure the configurations are correct taking as a reference the GPT example.

Re: s32k344 Clock settings

AhmadTurkmani — Thu, 24 Aug 2023 05:59:31 GMT

i already did the configurations using the example code as a reference.

Re: s32k344 Clock settings

VaneB — Thu, 24 Aug 2023 19:41:25 GMT

Hi @AhmadTurkmani

So, does the behavior mentioned above still occur?

Re: s32k344 Clock settings

AhmadTurkmani — Thu, 24 Aug 2023 20:15:15 GMT

Yes, I’m still experiencing the same problem

Re: s32k344 Clock settings

VaneB — Mon, 28 Aug 2023 20:34:58 GMT

Hi @AhmadTurkmani

Could you change the pin to measure the signal and show an image of it?

From the project attached before, the differences I observed from the Gpt example are:

When you call Mcu_Init(), you have defined MCU_PRECOMPILE_SUPPORT as STD_OFF. This causes the function to use the configurations of Mcu_Config_VS_0.
The given value to the value parameter (time-out period (in a number of ticks) after a notification or a wakeup event shall occur) is 12000000.

Could you share the image I previously mentioned to verify the signal behavior?