MSP432-DEBUGGERS: Change state DRDY pin in MSP432

Hi Biza,

Can you provide more detail on what you're seeing? Is PORT4_IRQHandler() ever entered, and if so, what is the value of "status"?

Thanks,

Urica Wang

Hello  Urica Wang,
Thank you for your support,
It is the first time, I use the driverlib, and I have doubts that I'm doing something wrong
I can't get into the interrupt, so I can't tell you what the result of the status variable is.

Thanks

Hi Biza,

Thanks for clarifying. I would make sure to call MAP_Interrupt_enableMaster() after MAP_Interrupt_enableInterrupt() in DRDY_work(). This allows the processor to respond to interrupts.

Thanks,

Urica Wang

Yes Urica,

is defined after MAP_Interrupt_enableInterrupt()

Hi Biza,

I don't see MAP_Interrupt_enableMaster() in the code above. Do you have a newer version of the code to show me?

Thanks,

Urica Wang

Yes Urica you are right ,

But now I have put the MAP_Interrupt_enableMaster() in the main after the function and before the while loop

Hi Biza,

Can you provide more details on what you're seeing/the behavior of the code? Are you now able to enter the interrupt, and if so, what is the value of "status"?

Thanks,

Urica Wang

I cant  not enter in the interrupt, in doubt if the problem does not come from another situation, because for there to be a transition of states, low/high on the pins must be triggered by something, something that is not happening

I cant  not enter in the interrupt, in doubt if the problem does not come from another situation, because for there to be a transition of states, low/high on the pins must be triggered by something, something that is not happening

Hi Biza,

I have tried the code you have linked above and was able to enter the ISR with a few changes:

1. Halted the watchdog

2. Commented out the closing brace on line 15 due to compile errors

3. Changed code to use P1.1, which has a switch connected to it on the MSP432P401R launchpad. Whenever the switch is pressed, the ISR is entered.

Here is the code with the changes for your reference.

/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>
uint8_t finish_flag = 0;
void DRDY_Work(void);

int main(void){
    MAP_WDT_A_holdTimer(); // U. Wang. Added this line.

    DRDY_Work();

    MAP_Interrupt_enableMaster();

    while(1){

         while(!finish_flag);


            MAP_GPIO_disableInterrupt( GPIO_PORT_P1, GPIO_PIN1);

            finish_flag=0;
            MAP_GPIO_clearInterruptFlag( GPIO_PORT_P1, GPIO_PIN1);
            MAP_GPIO_enableInterrupt( GPIO_PORT_P1, GPIO_PIN1);
        //} // U. Wang. Removed this line.
    }
}


void DRDY_Work(void){


    MAP_GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P1, GPIO_PIN1);
    GPIO_interruptEdgeSelect(GPIO_PORT_P1,GPIO_PIN1, GPIO_HIGH_TO_LOW_TRANSITION);
    MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, GPIO_PIN1);
    MAP_GPIO_enableInterrupt(GPIO_PORT_P1, GPIO_PIN1);
    MAP_Interrupt_enableInterrupt(INT_PORT1);

}

// When the switch (P1.1) is pressed, this ISR is entered
void PORT1_IRQHandler(void){
    uint32_t status;

    status = MAP_GPIO_getEnabledInterruptStatus(GPIO_PORT_P1);
    MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, status);

    if(status & GPIO_PIN1){
        finish_flag = 1;
    }
}

Using an oscilloscope or logic analyzer, can you verify whether a state transition is occurring on P4.4?

Thanks,

Urica Wang