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　 #include "inc/hw_ints.h" #include "inc/hw_memmap.h" #include "inc/hw_types.h" #include "driverlib/gpio.h" #include "driverlib/interrupt.h" #include "driverlib/rom.h" #include "driverlib/rom_map.h" #include "driverlib/sysctl.h" #include "driverlib/timer.h" unsigned long _led = 0; //***************************************************************************** // // The interrupt handler for the first timer interrupt. // //***************************************************************************** void Timer0IntHandler(void) { // // Clear the timer interrupt. // MAP_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT); // // Toggle the led for the timer. // MAP_GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2, _led ^= 0x04); } /* * ======== main ======== */ int main() { // // Set the clocking to run directly from the crystal. // MAP_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_8MHZ); // // Enable the peripherals used by this example. // MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0); MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG); // // Enable processor interrupts. // IntMasterEnable(); // // Configure the two 32-bit periodic timers. // MAP_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC); MAP_TimerLoadSet(TIMER0_BASE, TIMER_A, SysCtlClockGet() / 2); // // Configure the pins that connect to the LCD as GPIO outputs. // MAP_GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, 0x04); // // Setup the interrupts for the timer timeouts. // MAP_IntEnable(INT_TIMER0A); MAP_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT); // // Enable the timers. // MAP_TimerEnable(TIMER0_BASE, TIMER_A); while(1); }