TMS320F28377S: Gpio -> Xint4 : Clear flag before enable interrupt?

Hi A GIR,

I'm trying to locate the functions you are using so I can see which registers are being set. Which software package are you using? ControlSUITE? C2000Ware? Something else?

Regards,
Kris

Hello,

I'm using C2000Ware v1.0.1.0

Thank

Hello

No reply from this post?
Regards,

Have you tried clearing the specific flag in IFR register of PIE before enabling the interrupt ?

Vivek Singh

Hello

No, not try,
If it is the only way, I will test it, but this is not very efficient since the Reference manual §2.4.4.3 indicate to never clear this bit, but let µC take the interrupt. (Via a dummy ISR routine)

A GIR,

Another way to do this may be to re-assign the XBAR pin instead of disabling the interrupt. If you have any unused or unbonded pins (using a package other than BGA) you could assign the XBAR to those. If you do not, then you can assign the XBAR to a GPIO which doesn't exist (i.e. there is no GPIO300 so write a 300). If you go this route, please let me know so I can verify the value in the design will always be constant.

When you want to "activate" the capture, just re-assign the XBAR to the correct pin.

Regards,
Kris

I believe you are not clearing the IFR register for the specified interrupt group containing the XINT.

In your case you are using XINT4.

Using Driverlib, this is the sequence for enabling and disabling,

    
// To Enable XINT4
    Interrupt_disableMaster();
    Interrupt_disable(INT_XINT4);
    Interrupt_register(INT_XINT4, Xint4Handler);
    Interrupt_enable(INT_XINT4);
    Interrupt_enableMaster();

//To Disable XINT4
    Interrupt_disableMaster();
    Interrupt_disable(INT_XINT4);
    Interrupt_unregister(INT_XINT4);

//To Enable the GPIO for XINT
    GPIO_setInterruptPin(pinNumber, (GPIO_ExternalIntNum)GPIO_INT_XINT4);
    GPIO_enableInterrupt((GPIO_ExternalIntNum)GPIO_INT_XINT4);
    GPIO_setInterruptType((GPIO_ExternalIntNum)GPIO_INT_XINT4, GPIO_INT_TYPE_RISING_EDGE);

//To Disable the GPIO for XINT
    GPIO_disableInterrupt((GPIO_ExternalIntNum)GPIO_INT_XINT4);

Here is what I believe you are missing.

In the Interrupt_disable function, the interrupt group for that specific interrupt is both acked and cleared (PIE ACK and IFR).

Interrupt_clearIFR(groupMask);

// Acknowledge any interrupts
HWREGH(PIECTRL_BASE + PIE_O_ACK) = groupMask;

Where group mask is,
interruptNumber = INT_XINT4;
intGroup = ((uint16_t)(interruptNumber & 0xFF00U) >> 8U) - 1U;
groupMask = 1U << intGroup;

Let me know if this helps.

Hello

To disable interrupt, I call following:

GPIO_disableInterrupt((GPIO_ExternalIntNum)GPIO_INT_XINT4);        
Interrupt_disable(INT_XINT4);  

Then the IFR register is well cleared.

Hi, I assume issue is resolved?

 Vivek Singh

Hello,

I not think problem is resolved.

I Must retry, but we ask me to clear IFR register to resolve my problem, by my code already clear it like indicated.

Hi A GIR,

Did you try the XBAR option I described above?

Regards,
Kris

Hi,
No, not yet try