cc2540 interrupt routine implementation

Thanks for the help,

Can you point me to the handler you've mentioned in hal_key.c and the important macro?

sorry, but did you even look at the file?

1. open Components\hal\target\CC2540EB\hal_key.c in a text editor
2. grab the scrollbar and drag it to the lowest possible position
3. voila, behold the HAL_ISR_FUNCTION( halKeyPort2Isr, P2INT_VECTOR ) in all it's beauty including the macros called by this IRQ handler

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Hi William,

it is exactly as you said:

• I raise an event in the ISR by calling osal_set_event()
• then I handle the event in the event-llop of the main-task
• at the end of the event-handler i start a timer by calling osal_timer_startEx
• if the timer expires i re-enter battery-power-mode

HTH

Andre

Hi,

        I am new to CC2540 and BLE so please help me.

I am also trying to do something similar, I am trying to raise an Interrupt when there is a change from High to low in pulse and Low to High in the pulse, I have set the GPIO as input, selected the trigerring edge and Enabled the IRQ for the given port

I am using HAL_ISR_FUNCTION(halKeyPort0Isr, P0INT_VECTOR) and the P0INT_VECTOR is the Interrupt Vector for the Port0 ( #define  P0INT_VECTOR   VECT( 13, 0x6B )   /*  Port 0 Inputs */) , so if I write my code in the HAL_ISR_FUNCTION will it execute when the Interrupt on the GPIO pin happen?

And also please anyone clear me, the ISR should written only in halkey.c or it can e written anywhere else

And, if I have to write more than one Interrupt Service Routine how do I do it ?

Thank you.

Regards,

-Rakesh

Hi Rakesh,

1. if I write my code in the HAL_ISR_FUNCTION will it execute when the Interrupt on the GPIO pin happen?

Yes

2. the ISR should written only in halkey.c or it can e written anywhere else?

It can be anywhere but I suggest you keep it in hal_key.c

3.  if I have to write more than one Interrupt Service Routine how do I do it ?

Don't understand your question well. Would you specify your question?

Thanks Chen for replying,

I will try to explain in detail what I am try to do:

 I have three sensor connected to P0.4 , P0.6 and P0.7 respectively, I have used PICTL bit register to generate an Interrupt during the raising edge and falling edge of the input pins, and I am recording the Time of Interrupt

The time of Interrupt between these pins is very less and also two sensor or three sensors together(total of six interrupts maximum at any point of time) might generate an interrupt at the same time.

So what I want to know is

1. If I am using HAL_ISR_FUNCTION a single ISR Routine, if two Interrupts happen at time how will it handle ?

2. I want to handle Interrupts from Different Ports differently using different ISR Routines meaning when P0.4 generates and Interrupt I want an ISR to handle this event and if the P0.6 generates interrupt I want a different ISR to handle the event..

3. In the condition like multiple Interrupts happen at the same time which are ways I can handle It?

4. And if I want to set the P0IFG register for both Rising Edge and Falling Edge (i.e I want the Interrupt to happen at Rising Edge of the Input and also at Falling Edge of the Input on the Same Input Pin) is it possile ? If possible how do I go about it ?

Thanking you.

Regareds,

Rakesh

Hi, 

OSAL can handle interrupts at time, so no need to worry about it.

1. HAL_ISR_FUNCTION handles one interrupt only. But you can modify it. When interrupt occurred you can check all interrupt flags and call relative ISR. I mean lets say if 2 interrupts occur together than two bits will be set. You can call interrupt routine one by one. Don't forget to clear bit once ISR is served.

2. You can write different function which calls ISR of different pin, I mean you can have 3 functions each function handling interrupt for single port only. 

Example for port 0. 

#pragma vector = P0INT_VECTOR  

__interrupt  void p0_ISR(void){

......//Your code for port 0.

}.

you can write same for port 1 and 2.

vector = P1INT_VECTOR  for port 1 and  P2INT_VECTOR for port 2. 

3. In above function you can take for loop and check for interrupt flags. If lets say flag is set for pin 1 and pin2, First call ISR to handle interrupt of pin1 and then pin 2. You need to also clear flag manually after calling ISR.

4. In a way it's possible. You can't have both mode set at a time. Lets say if interrupt occur in sequence as follow:

R F R F R F R F.  (R = Rising edge, F= Falling edge). 

Then you can initially set interrupt mode to rising edge. When interrupt occurs, change mode to falling edge in ISR, Again next time change mode to Rising edge in ISR. Thus you can have both mode on single pin. But you can't have both mode at same time. 

Got it .... Thank you