程序进不了TIMER0中断

2019-03-24 14:11发布

站内问答 / TI MCU
21477 16 1046
在startup.c中已注册Timer0AIntHandler中断，但调试时进不了中断

#include "C:/StellarisWare/inc/hw_ints.h"
#include "C:/StellarisWare/inc/hw_memmap.h"
#include "C:/StellarisWare/inc/hw_types.h"
// #include "C:/StellarisWare/driverlib/debug.h"
#include "C:/StellarisWare/driverlib/interrupt.h"
#include "C:/StellarisWare/driverlib/sysctl.h"
#include "C:/StellarisWare/driverlib/timer.h"
#include "C:/StellarisWare/grlib/grlib.h"
#include "C:/Program Files/IAR SystemsEmbedded Workbench 6.0 Kickstart/arm/examples/TexasInstruments/Stellaris/boards/dk-lm3s9b96/drivers/kitronix320x240x16_ssd2119_8bit.h"
#include "C:/Program Files/IAR SystemsEmbedded Workbench 6.0 Kickstart/arm/examples/TexasInstruments/Stellaris/boards/dk-lm3s9b96/drivers/set_pinout.h"
#include "C:/Program Files/IAR SystemsEmbedded Workbench 6.0 Kickstart/arm/examples/TexasInstruments/Stellaris/driverlib/gpio.h"
#include "C:/StellarisWare/driverlib/ssi.h"
#include "C:/StellarisWare/inc/hw_ssi.h"
#include "C:/StellarisWare/driverlib/can.h"
#include "C:/StellarisWare/inc/hw_can.h"
#include "C:/StellarisWare/driverlib/udma.h"
#include "C:/StellarisWare/inc/hw_gpio.h"
#include "C:/StellarisWare/driverlib/gpio.h"


//  定时器的中断服务函数
void Timer0AIntHandler(void)
{
    unsigned char ucVal;
    unsigned long ulStatus;

    ulStatus = TimerIntStatus(TIMER0_BASE, true);           //  读取中断状态
    TimerIntClear(TIMER0_BASE, ulStatus);                   //  清除中断状态，重要！

    if (ulStatus & TIMER_TIMA_TIMEOUT)                      //  如果是Timer超时中断
    {
        ucVal = GPIOPinRead(GPIO_PORTD_BASE, GPIO_PIN_4 );             //  反转LED
        GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_4, ~ucVal);
    }
}

main(void)
{   
  
    //jtagWait();
    //
    //
    //设置系统时钟为50Mhz
    SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_16MHZ);
    SysCtlClockGet();
    PinoutSet();
    SysCtlPeripheralReset(SYSCTL_PERIPH_TIMER0);
   
   SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);                 //  使能Timer模块

    TimerConfigure(TIMER0_BASE, TIMER_CFG_16_BIT_PAIR |     //  配置Timer为16位周期定时器
                                TIMER_CFG_A_PERIODIC);

    GPIOPinTypeTimer(TIMER0_BASE,TIMER_A);//GPIO_PIN_4,GPIO_DIR_MODE_OUT);
    GPIODirModeSet(GPIO_PORTD_BASE, GPIO_PIN_4, GPIO_DIR_MODE_OUT);
    GPIOPadConfigSet(GPIO_PORTD_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
    GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_4, 0xff);
    TimerLoadSet(TIMER0_BASE, TIMER_A, 300000);              //  设置Timer初值，定时500ms
    TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);        //  使能Timer超时中断
    IntEnable(INT_TIMER0A);                                 //  使能Timer中断
    IntMasterEnable();                                      //  使能处理器中断
    TimerEnable(TIMER0_BASE, TIMER_A);                      //  使能Timer计数   
   
  while(1)
  {}
} 此帖出自小平头技术问答
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16条回答
shower.xu
2019-03-25 17:57
试试这个，我实验通过


  1. static unsigned short g_ulCounter;


    //*****************************************************************************
    //
    // The interrupt handler for the Timer0A interrupt.
    //
    //*****************************************************************************
    void
    Timer0AIntHandler(void)
    {
    //
    // Clear the timer interrupt flag.
    //
    TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);

    //
    // Update the periodic interrupt counter.
    //

    if(g_ulCounter++==500)
    {
    g_ulCounter=0;
    LED_Blink(LED_3);
    }

    }

    void TimerA_init(void)
    {

    // The Timer0 peripheral must be enabled for use.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);

    //
    // Configure Timer0A as a 16-bit periodic timer.
    //
    TimerConfigure(TIMER0_BASE, TIMER_CFG_16_BIT_PAIR |
    TIMER_CFG_A_PERIODIC);

    //
    // Set the Timer0A load value to 2ms.
    //
    TimerLoadSet(TIMER0_BASE, TIMER_A, SysCtlClockGet() / 500);

    //
    // Enable processor interrupts.
    //
    IntMasterEnable();

    //
    // Configure the Timer0A interrupt for timer timeout.
    //
    TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);

    //
    // Enable the Timer0A interrupt on the processor (NVIC).
    //
    IntEnable(INT_TIMER0A);

    //
    // Initialize the interrupt counter.
    //
    g_ulCounter = 0;

    //
    // Enable Timer0A.
    //
    TimerEnable(TIMER0_BASE, TIMER_A);

    }
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