求助关于ARM M3 中断问题

机动哥

Prodigy 161 points

#include "hw_memmap.h"

#include "hw_ints.h"

#include "hw_nvic.h"

#include "hw_types.h"

#include "interrupt.h"

#include "sysctl.h"

#include "gpio.h"

#define LED3 GPIO_PIN_6

#define KEY3 GPIO_PIN_4

#define PINS GPIO_PIN_5

void delay(int d)//延时函数

{

for( ; d; --d);

}

int main()

{

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);

GPIOPadConfigSet(GPIO_PORTB_BASE, PINS,

GPIO_STRENGTH_4MA,

GPIO_PIN_TYPE_STD);//配置管脚驱动,驱动电流2MA其实已足够

GPIODirModeSet(GPIO_PORTB_BASE, PINS, GPIO_DIR_MODE_OUT);//设置管脚输出

GPIOPadConfigSet(GPIO_PORTB_BASE,KEY3,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);

GPIODirModeSet(GPIO_PORTB_BASE,KEY3,GPIO_DIR_MODE_IN);

IntMasterEnable();

// IntEnable(INT_GPIOB); //使能B端口中断

GPIOIntTypeSet(GPIO_PORTB_BASE,KEY3,GPIO_FALLING_EDGE); //下降沿中断

// GPIOPinIntEnable(GPIO_PORTB_BASE,KEY3); //使能中断

while(1) {

GPIOPinWrite(GPIO_PORTB_BASE, PINS, PINS);//输出高电平

delay(20000);//延时

GPIOPinWrite(GPIO_PORTB_BASE, PINS, ~PINS);//输出低电平

delay(20000);//延时

}

void GPIO_Port_B_ISR(void)

{

long IntStatus;

IntStatus=GPIOPinIntStatus(GPIO_PORTB_BASE,true);

GPIOPinIntClear(GPIO_PORTB_BASE,IntStatus);

if(IntStatus&KEY3) {

GPIOPinWrite(GPIO_PORTB_BASE,LED3,LED3^GPIOPinRead(GPIO_PORTB_BASE,LED3));

}

// IntEnable(INT_GPIOB); //使能B端口中断

// GPIOPinIntEnable(GPIO_PORTB_BASE,KEY3); //使能中断

为什么要屏蔽这两个才能进入死循环 while(1)

如果不屏蔽的话死循环的点灯就不会执行且中断也没反应。

不知道是不是哪设置的不对啊！

是在PROTEUS仿真下试验的

13 年多前

0 机动哥 13 年多前

Prodigy 161 points

startup_ewarm.c 的配置如下

//*****************************************************************************

// startup_ewarm.c - Startup code for use with IAR's Embedded Workbench,

// version 5.

// Software License Agreement

// Texas Instruments (TI) is supplying this software for use solely and

// exclusively on TI's microcontroller products. The software is owned by

// TI and/or its suppliers, and is protected under applicable copyright

// laws. You may not combine this software with "viral" open-source

// software in order to form a larger program.

// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.

// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT

// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY

// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

// DAMAGES, FOR ANY REASON WHATSOEVER.

// This is part of revision 8555 of the EK-LM3S811 Firmware Package.

//*****************************************************************************

// Enable the IAR extensions for this source file.

//*****************************************************************************

#pragma language=extended

//*****************************************************************************

// Forward declaration of the default fault handlers.

//*****************************************************************************

void ResetISR(void);

static void NmiSR(void);

static void FaultISR(void);

static void IntDefaultHandler(void);

void GPIO_Port_B_ISR(void); //没加 extern 关键字

//*****************************************************************************

// The entry point for the application startup code.

//*****************************************************************************

extern void __iar_program_start(void);

//*****************************************************************************

// Reserve space for the system stack.

//*****************************************************************************

static unsigned long pulStack[64] @ ".noinit";

//*****************************************************************************

// A union that describes the entries of the vector table. The union is needed

// since the first entry is the stack pointer and the remainder are function

// pointers.

//*****************************************************************************

typedef union

{

void (*pfnHandler)(void);

unsigned long ulPtr;

}

uVectorEntry;

//*****************************************************************************

// The vector table. Note that the proper constructs must be placed on this to

// ensure that it ends up at physical address 0x0000.0000.

//*****************************************************************************

__root const uVectorEntry __vector_table[] @ ".intvec" =

{

{ .ulPtr = (unsigned long)pulStack + sizeof(pulStack) },

// __iar_program_start, // The initial stack pointer

ResetISR, // The reset handler

NmiSR, // The NMI handler

FaultISR, // The hard fault handler

IntDefaultHandler, // The MPU fault handler

IntDefaultHandler, // The bus fault handler

IntDefaultHandler, // The usage fault handler

0, // Reserved

IntDefaultHandler, // SVCall handler

IntDefaultHandler, // Debug monitor handler

0, // Reserved

IntDefaultHandler, // The PendSV handler

IntDefaultHandler, // The SysTick handler

IntDefaultHandler, // GPIO Port A

GPIO_Port_B_ISR, // GPIO Port B

IntDefaultHandler, // GPIO Port C

IntDefaultHandler, // GPIO Port D

IntDefaultHandler, // GPIO Port E

IntDefaultHandler, // UART0 Rx and Tx

IntDefaultHandler, // UART1 Rx and Tx

IntDefaultHandler, // SSI0 Rx and Tx

IntDefaultHandler, // I2C0 Master and Slave

IntDefaultHandler, // PWM Fault

IntDefaultHandler, // PWM Generator 0

IntDefaultHandler, // PWM Generator 1

IntDefaultHandler, // PWM Generator 2

IntDefaultHandler, // Quadrature Encoder 0

IntDefaultHandler, // ADC Sequence 0

IntDefaultHandler, // ADC Sequence 1

IntDefaultHandler, // ADC Sequence 2

IntDefaultHandler, // ADC Sequence 3

IntDefaultHandler, // Watchdog timer

IntDefaultHandler, // Timer 0 subtimer A

IntDefaultHandler, // Timer 0 subtimer B

IntDefaultHandler, // Timer 1 subtimer A

IntDefaultHandler, // Timer 1 subtimer B

IntDefaultHandler, // Timer 2 subtimer A

IntDefaultHandler, // Timer 2 subtimer B

IntDefaultHandler, // Analog Comparator 0

IntDefaultHandler, // Analog Comparator 1

IntDefaultHandler, // Analog Comparator 2

IntDefaultHandler, // System Control (PLL, OSC, BO)

IntDefaultHandler // FLASH Control

};

//*****************************************************************************

// This is the code that gets called when the processor first starts execution

// following a reset event. Only the absolutely necessary set is performed,

// after which the application supplied entry() routine is called. Any fancy

// actions (such as making decisions based on the reset cause register, and

// resetting the bits in that register) are left solely in the hands of the

// application.

//*****************************************************************************

void

ResetISR(void)

{

// Call the application's entry point.

__iar_program_start();

}

//*****************************************************************************

// This is the code that gets called when the processor receives a NMI. This

// simply enters an infinite loop, preserving the system state for examination

// by a debugger.

//*****************************************************************************

static void

NmiSR(void)

{

// Enter an infinite loop.

while(1)

{

}

//*****************************************************************************

// This is the code that gets called when the processor receives a fault

// interrupt. This simply enters an infinite loop, preserving the system state

// for examination by a debugger.

//*****************************************************************************

static void

FaultISR(void)

{

// Enter an infinite loop.

while(1)

{

}

//*****************************************************************************

// This is the code that gets called when the processor receives an unexpected

// interrupt. This simply enters an infinite loop, preserving the system state

// for examination by a debugger.

//*****************************************************************************

static void

IntDefaultHandler(void)

{

// Go into an infinite loop.

while(1)

{

}

0 user1968840 13 年多前

Expert 1140 points

fanhuaming fanhuaming :

这是全部的代码？怎么连时钟设置都没有呀

0 Richard Ma 13 年多前

TI__Expert 5850 points

楼主检查下你中断向量表中中断的位置，看看是否正确，有可能跑到别的中断里去了

可以不用startup代码，参考driverlib的例程写一个试试：

int iVal;

// Register the port-level interrupt handler. This handler is the

// first level interrupt handler for all the pin interrupts.

GPIOPortIntRegister(GPIO_PORTA_BASE, PortAIntHandler);

// Initialize the GPIO pin configuration.

// Set pins 2, 4, and 5 as input, SW controlled.

GPIOPinTypeGPIOInput(GPIO_PORTA_BASE,

GPIO_PIN_2 | GPIO_PIN_4 | GPIO_PIN_5);

// Set pins 0 and 3 as output, SW controlled.

GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_3);

// Make pins 2 and 4 rising edge triggered interrupts.

GPIOIntTypeSet(GPIO_PORTA_BASE, GPIO_PIN_2 | GPIO_PIN_4, GPIO_RISING_EDGE);

// Make pin 5 high level triggered interrupts.

GPIOIntTypeSet(GPIO_PORTA_BASE, GPIO_PIN_5, GPIO_HIGH_LEVEL);

// Read some pins.

iVal = GPIOPinRead(GPIO_PORTA_BASE,

(GPIO_PIN_0 | GPIO_PIN_2 | GPIO_PIN_3 |

GPIO_PIN_4 | GPIO_PIN_5));

// Write some pins. Even though pins 2, 4, and 5 are specified, those

// pins are unaffected by this write because they are configured as inputs.

// At the end of this write, pin 0 will be a 0, and pin 3 will be a 1.

GPIOPinWrite(GPIO_PORTA_BASE,

(GPIO_PIN_0 | GPIO_PIN_2 | GPIO_PIN_3 |

GPIO_PIN_4 | GPIO_PIN_5),

0xF8);

// Enable the pin interrupts.

GPIOPinIntEnable(GPIO_PORTA_BASE, GPIO_PIN_2 | GPIO_PIN_4 | GPIO_PIN_5);

0 机动哥 13 年多前回复 Richard Ma

Prodigy 161 points

问题解决了，中断跟Backup of driverlib.a 也是有关系的。

我用TI函数库中的D:\StellarisWare\driverlib\ewarm-cm3\Exe\driverlib-cm3.a这个文件一直进不了中断。。后来按照周立功的做法用IAR得新生成的Backup of driverlib.a 进中断可以。。

0 user1968840 13 年多前回复机动哥

Expert 1140 points

fanhuaming ：

这种软件仿真的很多东西不可信。。。

存档论坛

基于 Stellaris®︎ ARM®︎ Cortex™︎-M3 的 MCU (Read-Only)

求助关于ARM M3 中断问题

存档论坛

基于 Stellaris®︎ ARM®︎ Cortex™︎-M3 的 MCU (Read-Only)

求助 关于ARM M3 中断问题

求助关于ARM M3 中断问题