How can I process the TIM12 update interrupt in TIM8_UP_TIM13_IRQHandler?
- MCU: STM32F767

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Question

The TIM12 update interrupt is not occurred in TIM8_UP_TIM13_IRQHandler().

However it is occurred in TIM8_TRG_COM_TIM14_IRQHandler()

I configured TIM12 update interrupt as below;

//TIM4: master -> TIM12: slave

void MX_Test_TIM4_TIM12(void) {

NVIC_EnableIRQ(TIM8_UP_TIM13_IRQn);

__HAL_RCC_TIM12_CLK_ENABLE();

__HAL_RCC_TIM4_CLK_ENABLE();

TIM12->ARR = 16000; // slave timer period

// trigger selection TS=001 ITR1 = TIM2, slave mode SMS=0111 external clock mode 1

TIM12->SMCR = TIM_TS_ITR0 | TIM_SMCR_SMS_0 | TIM_SMCR_SMS_1 | TIM_SMCR_SMS_2;

TIM12->DIER = TIM_DIER_UIE; // interrupt on update event (timer overflow)

TIM12->CR1 = TIM_CR1_CEN; // enable timer 3

TIM4->PSC = 54; // prescaler preload

TIM4->EGR = TIM_EGR_UG; // update prescaler

TIM4->ARR = 250; // master timer period

TIM4->CR2 = TIM_TRGO_UPDATE; // master mode selection MMS=010 Update event

TIM4->CR1 = TIM_CR1_CEN; // enable timer 2

}

Let me know why TIM12 update interrupt is occurred in TIM8_TRG_COM_TIM14_IRQHandler()?

waclawek.jan · Answer

Why would be TIM12 interrupt associated with TIM8_UP_TIM13 ? Imo it should be associated with TIM8_BRK_TIM12 - see NVIC chapter in RM0410.

Check if the vector table in startup code / disassembly matches that in the RM.

JW

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