PWM with FTM1 and channel 1 : The program hangs. Works fine for FTM2 and channel 3

mona — Mon, 23 Mar 2020 15:27:35 GMT

Hi,

I am working with FRDM-KE06Z custom board. I have imported ftm_simple_pwm program in to my MCUXpresso IDE and started working on it.

In this code I see that they are using FTM2 and channel 3. And FTM2_IRQn. Like below.

#define BOARD_FTM_BASEADDR FTM2
#define BOARD_FTM_CHANNEL kFTM_Chnl_3

#define FTM_INTERRUPT_NUMBER FTM2_IRQn
#define FTM_LED_HANDLER FTM2_IRQHandler

#define FTM_CHANNEL_INTERRUPT_ENABLE kFTM_Chnl3InterruptEnable
#define FTM_CHANNEL_FLAG kFTM_Chnl3Flag

#define FTM_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_TimerClk)

and in the main function in the

BOARD_InitPins();

inside BOARD_InitPins(); function they are using corresponsding pin.

PORT_SetPinSelect(kPORT_FTM2CH3, kPORT_FTM2_CH3_PTG5);

When I debug everything is fine.

My question is

I wanted to use FTM1 and Channel 1. Since I want to use FTM1 hence I am using FTM1_IRQn. Like below.

#define BOARD_FTM_BASEADDR FTM1
#define BOARD_FTM_CHANNEL kFTM_Chnl_1
#define FTM_INTERRUPT_NUMBER FTM1_IRQn
#define FTM_LED_HANDLER FTM1_IRQHandler
#define FTM_CHANNEL_INTERRUPT_ENABLE kFTM_Chnl1InterruptEnable
#define FTM_CHANNEL_FLAG kFTM_Chnl1Flag

Also I changed the pin in BOARD_InitPins(); function as below.

PORT_SetPinSelect(kPORT_FTM1CH1, kPORT_FTM1_CH1_PTC5);

When I debug this code my program is hanging. When I made step by step debug I see that when execution goes to the FTM_Init(BOARD_FTM_BASEADDR, &ftmInfo); function, when execution goes to

base->MODE = FTM_MODE_FAULTM(config->faultMode) | FTM_MODE_FTMEN_MASK | FTM_MODE_WPDIS_MASK;

program is hanging all the times.

When I use FTM2 with channel 3 and FTM"_IRQn then it is fine. The problem is only when I use FTM1 and channel1 and FTM1_IRQn.

I should use FTM1 since my prototype uses PTC5 for PWM.

Can someone tell me the problem here?. Thank you.

Re: PWM with FTM1 and channel 1 : The program hangs. Works fine for FTM2 and channel 3

Sebastian_Del_Rio — Tue, 24 Mar 2020 17:22:59 GMT

Hi Mohan, I hope you're doing well!

Is it possible for you to try replicating the issue on a FRDM-KE06Z development board? This is to make sure that the issue is not due to possible errors in the custom board and to better isolate the possible issue.

Please let me know of your findings.

Best regards,

Sebastian

Kinetis MicrocontrollersのトピックPWM with FTM1 and channel 1 : The program hangs. Works fine for FTM2 and channel 3

PWM with FTM1 and channel 1 : The program hangs. Works fine for FTM2 and channel 3

Re: PWM with FTM1 and channel 1 : The program hangs. Works fine for FTM2 and channel 3