Question

我正在尝试为msp430g2452 mcu编写一些代码。它应该使用中断和switch语句循环开启或关闭几种led模式。我刚开始学习编码，c和python :)所以我不确定出了什么问题。

据我所知，一切正常，除了我没有在p1.3上捕获中断，这是我的启动板仿真/开发板上的一个按钮。如果我使用代码编辑器工作室5进行调试并暂停仿真，那么我会更改P1IFG.3的位并恢复仿真，发生正确的事件链。因此，在我看来，问题是捕获切换边缘。

如果有人对这里发生的事情有任何想法，我将非常感激。 mcu datasheet感兴趣的人。我正在使用的代码：

#include <msp430g2452.h>

#define button BIT3 // set button to p1.3
#define grnLED BIT6 // set green led to p1.6
#define redLED BIT0 // set red led to p1.0

volatile unsigned int stateID = 0; // declare and clear stateID

void main(void) {
WDTCTL = WDTPW | WDTHOLD;     // Stop watchdog timer

P1DIR |= (grnLED + redLED); // set bit0 and bit6 to output, led's
P1OUT &= ~(grnLED + redLED); // both led's off

P1IE |= button; // enable interrupts on button
P1REN |= button; // enable pull-up resistor on button
P1IFG &= ~button; // flag for button off

_EINT(); // enable interrupts

// loop forever
while (1){
      switch(stateID){ //switch based on state of stateID
      case 1:
      {
              P1OUT = grnLED; //turn green led on
              break;
      }
      case 2:
      {
              P1OUT = redLED; //turn red led on
              break;
      }
      case 3:
      {
              P1OUT = (grnLED + redLED); // turn both led's on
              break;
      }
      case 4:
      {
              stateID = 0; // reset stateID
              break;
      }
      default:
      {
              P1OUT &= ~(grnLED + redLED); // turn both led's off again
              break;

      }
      }
}
}

// interrupt handler
#pragma vector=PORT1_VECTOR
__interrupt void Port_1 (void){
  _DINT(); // disable interrupts to avoid nesting
  stateID=(stateID+1); // increment stateID
  P1IFG &= ~button; // clear interrupt flag on button
  _EINT(); // re-enable interrupts
}

这是固定代码

#include <msp430g2553.h>

/* written by: rob j loranger
* date: april  2013
*
* this program should emulate a typical headlamp operation,
* from a power off state one button press should turn on the lamp in mode one.
* each successive press should cycle through modes until it returns to an off state
*
* main.c
*/

#define button BIT3 // set button to p1.3
#define grnLED BIT6 // set green led to p1.6
#define redLED BIT0 // set red led to p1.0

volatile unsigned int stateID = 0; // declare and clear stateID


void main(void) {
WDTCTL = WDTPW | WDTHOLD;     // Stop watchdog timer

P1DIR |= (grnLED + redLED); // set bit0 and bit6 to output, led's
P1OUT &= ~(grnLED + redLED); // both led's off
P1OUT |= button; // set button to output


/* i set button to an output and i set the edge high 
*  for the interrupt as well.
*/


P1IE |= button; // enable interrupts on button
P1IES |= button; // set edge high
P1REN |= button; // enable pull-up resistor on button
P1IFG &= ~button; // flag for button off

_EINT(); // enable interrupts


/* i then made some changes to my loop to prevent the output 
*  state on button from being changed
*/

// loop forever
while (1){
      switch(stateID){ //switch based on state of stateID
      case 1:
      {
              P1OUT |= grnLED; //turn green led on
              break;
      }
      case 2:
      {
              P1OUT &= ~grnLED; // turn green led off
              P1OUT |= redLED; //turn red led on
              break;
      }
      case 3:
      {
              P1OUT |= grnLED; // turn green led on, both are on now
              break;
      }
      case 4:
      {
              stateID = 0; // reset stateID
              break;
      }
      default:
      {
              P1OUT &= ~(grnLED + redLED); // turn both led's off again
              break;

      }
      }
}
}

// interrupt handler
#pragma vector=PORT1_VECTOR
__interrupt void Port_1 (void){
  _DINT(); // disable interrupts to avoid nesting
  stateID=(stateID+1); // increment stateID
  P1IFG &= ~button; // clear interrupt flag on button
  _EINT(); // re-enable interrupts
}

Answer 1

This数据表可能更有用，特别是第8节。

我建议您研究确保引脚确实配置为IO（P1SEL.x P1SEL2.x均为0），或检查“中断边沿选择”（P1IES.x）设置。

祝你好运！

msp430g2452从交换机捕获中断故障

1 个答案: