How to access EPI in task and interrupt?

Hello Jian,

It looks like there is a Fault for INVSTAT being set. The Access itself does not seem correct to me. If instead you replace it with HWREG to the EPI address space then what?

Regards
Amit

Hello Amit,

         Thanks for your answer.  I have found the code in hw_types.h:

#define HWREG(x)                                                              \
        (*((volatile uint32_t *)(x)))
#define HWREGH(x)                                                             \
        (*((volatile uint16_t *)(x)))

   It seems no different from my code.

Can I access EPI directly in TI-RTOS?

Thanks.

Best Regards. 

Hello Jian

EPI is not pre-configured. You would need to setup the IO's and the EPI configuration in the TI-RTOS setup to be able to access it.As an example the TivaWare has SDRAM with EPI code in examples/peripheral/epi that you may want to refer to. Also what is that you are trying to interface over EPI?

Regard
Amit

Hello Amit,

       I have configure the EPI. I just wonder how to set up the P4 P5 interrupt. Is the code below right? Thanks!

Hwi_Struct callbackPortP4Hwi;
const GPIO_Callbacks TM4C129X_gpioPortP4Callbacks = {
    GPIO_PORTP_BASE, INT_GPIOP4, &callbackPortP4Hwi,
    {NULL, NULL, NULL, NULL, isr_int, NULL, NULL, NULL}
};
Hwi_Struct callbackPortP5Hwi;
const GPIO_Callbacks TM4C129X_gpioPortP5Callbacks = {
    GPIO_PORTP_BASE, INT_GPIOP5, &callbackPortP5Hwi,
    {NULL, NULL, NULL, NULL, NULL, isr_sync0, NULL, NULL}
};

    GPIO_setupCallbacks(&TM4C129X_gpioPortP4Callbacks);
    GPIO_enableInt(TM4C129X_ECAT_ISR, GPIO_INT_FALLING);
    GPIO_setupCallbacks(&TM4C129X_gpioPortP5Callbacks);
    GPIO_enableInt(TM4C129X_ECAT_SYNC0, GPIO_INT_FALLING);

Hello Amit,

       I have configure the EPI. I just wonder how to set up the P4 P5 interrupt. Is the code below right? Thanks!

Hwi_Struct callbackPortP4Hwi;
const GPIO_Callbacks TM4C129X_gpioPortP4Callbacks = {
    GPIO_PORTP_BASE, INT_GPIOP4, &callbackPortP4Hwi,
    {NULL, NULL, NULL, NULL, isr_int, NULL, NULL, NULL}
};
Hwi_Struct callbackPortP5Hwi;
const GPIO_Callbacks TM4C129X_gpioPortP5Callbacks = {
    GPIO_PORTP_BASE, INT_GPIOP5, &callbackPortP5Hwi,
    {NULL, NULL, NULL, NULL, NULL, isr_sync0, NULL, NULL}
};

    GPIO_setupCallbacks(&TM4C129X_gpioPortP4Callbacks);
    GPIO_enableInt(TM4C129X_ECAT_ISR, GPIO_INT_FALLING);
    GPIO_setupCallbacks(&TM4C129X_gpioPortP5Callbacks);
    GPIO_enableInt(TM4C129X_ECAT_SYNC0, GPIO_INT_FALLING);

 

Hello Amit,

       I use another way to  set up the P4 P5 interrupt. But it is not success, but the interrupts ditn't happened, thanks!

cfg script:

var hwi0Params = new Hwi.Params();
hwi0Params.instance.name = "hwi0";
Program.global.hwi0 = Hwi.create(84, "&isr_int", hwi0Params);
var hwi1Params = new Hwi.Params();
hwi1Params.instance.name = "hwi1";
Program.global.hwi1 = Hwi.create(85, "&isr_sync0", hwi1Params);

c code:

 GPIOPinTypeGPIOInput(GPIO_PORTP_BASE, GPIO_PIN_4 | GPIO_PIN_5);
 GPIOIntTypeSet(GPIO_PORTP_BASE, GPIO_PIN_4 | GPIO_PIN_5, GPIO_FALLING_EDGE);
 GPIOIntEnable(GPIO_PORTP_BASE, GPIO_PIN_4 | GPIO_PIN_5);
 IntEnable(INT_GPIOP4);
 IntEnable(INT_GPIOP5);

 IntMasterEnable();

void isr_int()
{
 GPIOIntClear(GPIO_PORTP_BASE,GPIO_INT_PIN_4);
}
void isr_sync0()
{
 GPIOIntClear(GPIO_PORTP_BASE,GPIO_INT_PIN_5);
}