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Hall sensors not triggering IRQ from TIMER2

Question asked by anton.bogdan on Jan 2, 2017
Latest reply on Jan 26, 2017 by Khouloud G

Hello,

 

i am working on a bldc motor project for school, and for start to understand whats happening inside the IRQ handler, i have configured timer2  on ch1,2,3 with 3 emulated hardware signals, imitating the CW of a bldc motors

The hall emulated signals are coming from another development board. The signals are bellow

 

 

These signals ( H1,H2,H3) are feed into a STM32F407 device, on PA0, PA1 and PA2   which are Ch1,2,3 of the TIMER2 

 

i have prepared only the initialization of the timer2 to see if the hall signals trigger the CC1 event in the irq handler, but its not triggering.

I've put a small toggle on a PC1 pin just to see when its triggering inside the TIM2_IRQhandler,

 

But there is no triggering,

 

At this point Timer1 is not initialized, i just want to see how it behaives on the hall signals.

 

I am missing something?  Of does the Timer2 takes some kind of feedback from TIM1 in order to trigger CC1 event?

 

 

 


void timer2_setup(void){

GPIO_InitTypeDef GPIO_InitStructure;


RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);


RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);


RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);


GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 |GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);


GPIO_PinAFConfig(GPIOA, GPIO_PinSource0, GPIO_AF_TIM2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_TIM2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_TIM2);




//**** PC1 is used for toggle in IRQ handlers to see with logic analyzer
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_Init(GPIOC, &GPIO_InitStructure);





NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 7;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 7;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);



TIM_TimeBaseStructure.TIM_Prescaler = 126;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 65530;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_SelectHallSensor(TIM2, ENABLE);
TIM_SelectInputTrigger(TIM2, TIM_TS_TI1F_ED);
TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);

TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);

 

TIM_ICInitStructure.TIM_Channel = TIM_Channel_1 ;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_TRC;// listen to T1, the HallSensorEvent
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;// Div:1, every edge
TIM_ICInitStructure.TIM_ICFilter = 0;
TIM_ICInit(TIM2, &TIM_ICInitStructure);

// Enable CC1 interrupt request
TIM_ITConfig(TIM2, TIM_IT_CC1, ENABLE);
TIM_Cmd(TIM2, ENABLE);



}

 


void TIM2_IRQHandler(void){

if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
{
GPIO_ToggleBits(GPIOC,GPIO_Pin_1); // Toggle the pin for logic analyzer


TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);
}

 

}

 

 

 

 

 

 

 

 

 

 

 

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