FRDM_KL02Z TPM0 Timer Overflow Interrupt not working.

SoloTheDog — Mon, 25 Mar 2024 01:45:46 GMT

All of the registers seem to be set properly, and the TOF register is properly set when the timer overflows. I can poll it and manually clear it in main, but the TPM0_IRQHandler() doesn't get called. I tried the SDK example that uses the same interrupt and it also doesn't work, so don't think it is an issue in code. What else can I look at to get this working?

I'm using the fsl_tpm.h driver.

here is the initTimer() code that setups up TPM0_IRQHandler().

#include "fsl_tpm.h" #include "timer.h" #include "fsl_gpio.h" #include "pin_mux.h" #include "stdio.h" void initTimer() { tpm_config_t tpmConfig; TPM_GetDefaultConfig(&tpmConfig); tpmConfig.prescale = kTPM_Prescale_Divide_128; NVIC_SetPriority(TPM0_IRQn, 3); NVIC_EnableIRQ(TPM0_IRQn); TPM_Init(TPM0, &tpmConfig); uint32_t tpmClock = TPM_SOURCE_CLOCK; uint32_t timerPeriod = USEC_TO_COUNT(1000U, tpmClock) / 128; // 1ms TPM_EnableInterrupts(TPM0, kTPM_TimeOverflowInterruptEnable); TPM_SetTimerPeriod(TPM0, timerPeriod); TPM_StartTimer(TPM0, kTPM_SystemClock); } volatile uint32_t elapsedTime = 0; void TPM0_IRQHandler() { TPM_ClearStatusFlags(TPM0, kTPM_TimeOverflowFlag); GPIO_PortToggle(BOARD_INITPINS_LED_RED_GPIO, 1u << BOARD_INITPINS_LED_RED_PIN); }

Re: FRDM_KL02Z TPM0 Timer Overflow Interrupt not working.

xiangjun_rong — Mon, 01 Apr 2024 03:06:13 GMT

Hi,

Pls set the TOIE bit in TPMx_SC reg as the following Fig:

I suppose that the bit can be initialized by the structure

tpmConfig

Hope it can help you

XiangJun Rong

topic FRDM_KL02Z TPM0 Timer Overflow Interrupt not working. in Kinetis Microcontrollers

FRDM_KL02Z TPM0 Timer Overflow Interrupt not working.

Re: FRDM_KL02Z TPM0 Timer Overflow Interrupt not working.