topic Re: Timer interrupt using FTM in S32K

Timer interrupt using FTM

KKumar — Fri, 13 May 2022 07:21:33 GMT

Hi,

i wanted to configure FTM0 Channel 0 to interrupt(FTM_ch0_ch1_IRQHandler) on every 1 sec whenever FTM_COUNTER VALUE matches with CnV. FTM0 is configured to Free Running counter.

FTM0_Ovf_Reload_IRQHandler is working well.

(FTM_ch0_ch1_IRQHandler) is not working.

But somehow interrupt is not working. I have attached the program file.

External clock : 12 Mhz

SOSC_DIV1 and SOSC_DIV2 : 6 Mhz

CHIE = 1

TOIE = 1

Please verify and tell me what wrong i am doing here.

Re: Timer interrupt using FTM

Robin_Shen — Fri, 13 May 2022 10:29:42 GMT

Hi KKumar,

According to the description in "47.4.3.6 Channel (n) Value (C0V - C7V)" of S32K1xx MCU Family - Reference Manual, CnV should be wrote when the channel in output mode. But according to your codes and "Table 47-5. Channel Modes Selection", seems that channel 0 is not configured as output mode. So during debug you may find that the FTM0_C0V is always 0.

Best Regards,
Robin
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Re: Timer interrupt using FTM

KKumar — Fri, 13 May 2022 11:14:27 GMT

Thanks Robin for the Reply

But I wanted to disable the MCU pins for FTM means (ELSB:ELSA = 0:0).

And for Output compare ELSB:ELSA = 0:1/1:0/1:1

Is it possible for disable pins while FTM is in Output Compare mode AND use mcu pins as GPIO??

Re: Timer interrupt using FTM

Robin_Shen — Fri, 13 May 2022 13:10:27 GMT

Have you try this: 47.5.33 External Control of Channels Output