[参考译文] LAUNCHXL-F28P55X：使用外部 GPIO 触发 NMI

//#############################################################################
//
// FILE:   erad_ex2_bus_monitor.c
//
// TITLE:  ERAD Monotoring instruction and data address buses.
//
//! \addtogroup driver_example_list
//! <h1>ERAD HWBP Monitor Program Counter</h1>
//!
//!  In this example, the function delayFunction is called multiple times.
//!  The function does read and writes to the global variables startCount and
//!  endCount.
//!
//!  The BUSCOMP1 and COUNTER1 is used to count the number of times the function
//!  delayFunction was invoked. BUSCOMP2 is used to generate an interrupt when
//!  there is read access to the startCount variable and BUSCOMP3 is used to
//!  generate an interrupt when there is a write access to the endCount variable
//!
//!  \b Watch \b Variables \n
//!  - funcCount - number of times the function delayFunction was invoked
//!  - isrCount  - number of times the ISR was invoked
//!
//! \b External \b Connections \n
//!  - None
//
//#############################################################################

//
//Included Files
//
#include "driverlib.h"
#include "device.h"
//
// Globals
//
uint32_t isrCount = 0;
uint32_t funcCount = 0;
volatile uint32_t startCount, endCount;
#define myGPIO0_GPIO_PIN_CONFIG GPIO_5_GPIO5
#define myGPIO0 5
#define myINPUTXBARINPUT0_SOURCE 5
#define myINPUTXBARINPUT0_INPUT XBAR_INPUT1

//
// Main
//
void main(void)
{
    ERAD_Counter_Config sec_params;

    //
    // Initializes device clock and peripherals
    //
    Device_init();

    //
    // Configures the GPIO pin as a push-pull output
    //
    Device_initGPIO();

    // GPIO5 -> myGPIO0 Pinmux

	GPIO_setPinConfig(GPIO_5_GPIO5);
    GPIO_writePin(myGPIO0, 0);
	GPIO_setPadConfig(myGPIO0, GPIO_PIN_TYPE_STD);
	GPIO_setQualificationMode(myGPIO0, GPIO_QUAL_SYNC);
	GPIO_setDirectionMode(myGPIO0, GPIO_DIR_MODE_OUT);
	GPIO_setControllerCore(myGPIO0, GPIO_CORE_CPU1);

    XBAR_setInputPin(INPUTXBAR_BASE, myINPUTXBARINPUT0_INPUT, myINPUTXBARINPUT0_SOURCE);

    //
    // Initialise the ERAD module with the APPLICATION as the owner
    //
    ERAD_initModule(ERAD_OWNER_APPLICATION);

    //
    // Initializes PIE and clears PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initializes the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // Enable RTOS Interrupt
    //
    Interrupt_enable(INT_RTOS);
    sec_params.event = ERAD_EVENT_INPUTXBAR0;
    sec_params.event_mode = ERAD_COUNTER_MODE_RISING_EDGE;
    sec_params.reference = 0x2;
    sec_params.rst_on_match = true;

    ERAD_configCounterInCountingMode(ERAD_COUNTER1_BASE, sec_params);
    ERAD_enableNMI(ERAD_INST_COUNTER1);
    ERAD_enableModules(ERAD_INST_COUNTER1);

    EINT;
    ERTM;


    while(1)
    {
        // Once
        DEVICE_DELAY_US(100);
        GPIO_writePin(myGPIO0, 1);
        DEVICE_DELAY_US(100);
        GPIO_writePin(myGPIO0, 0);
        DEVICE_DELAY_US(100);
        ESTOP0;
        // Twice
        GPIO_writePin(myGPIO0, 1);
        DEVICE_DELAY_US(100);
        GPIO_writePin(myGPIO0, 0);
        DEVICE_DELAY_US(100);
        ESTOP0;
    };
}

您好 Hang、

这使用 GPIO5 -> INPUTXBAR -> ERAD -> NMI 生成  

在本示例中、我只是将 ERAD 设置为在出现两个 GPIO 上升沿时进行计数并生成 NMI。

此致、

Ryan Ma