Hi
I am trying to the use the TPM as capture timer with RTC seconds as trigger on the K65
I have the TPM counter running and the RTC generates 1 second interrupts.
TPM input clock is OSCER.
TPM trigger is set to RTC Seconds (13) but i do not get any TPM channel interrupt.
However I do get TPM overflow interrupts which indicates that the TPM counter is running. Also I can see the count value changing.
My setup code look like this
CLOCK_SetTpmClock(2);
// Start Capture timer
tpm_config_t config;
TPM_GetDefaultConfig(&config);
config.prescale = kTPM_Prescale_Divide_1;
config.useGlobalTimeBase = false; /* Use internal TPM counter as timebase */
config.enableDoze = false; /* TPM counter continues in doze mode */
config.enableDebugMode = false; /* TPM counter pauses when in debug mode */
config.enableReloadOnTrigger = false; /* TPM counter will not be reloaded on input trigger */
config.enableStopOnOverflow = false; /* TPM counter continues running after overflow */
config.enableStartOnTrigger = false; /* TPM counter starts on first trigger */
config.enablePauseOnTrigger = false; /* TPM does not pause on trigger */
config.triggerSelect = kTPM_Trigger_Select_13; /* Choose trigger select 0 as input trigger for controlling counter operation */
config.triggerSource = kTPM_TriggerSource_External; /* Choose external trigger source to control counter operation */
TPM_Init(TPM1, &config);
// Enable overflow interrupt
TPM_EnableInterrupts(TPM1, kTPM_Chnl0InterruptEnable | kTPM_TimeOverflowInterruptEnable);
NVIC_SetPriority(TPM1_IRQn, TPM1_INTERRUPT_PRIORITY);
NVIC_EnableIRQ(TPM1_IRQn);
TPM1->CNT = 0x0;
TPM1->MOD = 0xFFFF;
// Clear overflow flag
TPM1->SC |= TPM_SC_TOF_MASK;
TPM_SetupInputCapture(TPM1,kTPM_Chnl_0, kTPM_RisingEdge);
TPM_StartTimer(TPM1, kTPM_SystemClock);
Have anyone of you tried this configuration with success.
Any suggestions appreciated.
Best regards
Anders
