[参考译文] MSP430F5438A：使用 Timer B 时、硬件调试结果与离线操作不一致

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https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/995862/msp430f5438a-hardware-debugging-results-are-inconsistent-with-offline-operation-when-using-timer-b

器件型号：MSP430F5438A
主题中讨论的其他器件：MSP-FET430UIF、

你(们)好。

有问题让我困扰了好几天。

当我使用 MSP-FET430UIF 使用计时器 B 调试 msp430f5438A 板时、我发现一切都很好。但是、在我将代码下载到芯片中后、我发现我似乎无法进入计时器 B ISR。部分代码如下所示。

/*
*  this is my initializing function
*/
#define Init_TimerB() \
  do{                 \
    P4SEL |= BIT1;    /*P4.1 option select*/ \
      P4DIR |= BIT1;   /*P4.1 outputs*/ \
        P4DS |= BIT1;   /*P4.1 full drive strength, it seems it is not necessary*/ \
          TBCCR0 = TBCCR0_INIT - 1;         \
            TBCCTL0 = CCIE;                   /*enable CCR0 interrupt*/ \
              TBCCTL1 = 0x0200 | OUTMOD_4;     /*TBxCLn loads when TBxR counts to 0*/ \
                TBCCR1 = TBCCR1_NORMAL;           \
                  TBCTL = TBSSEL_2 + MC_3 + TBCLR + TBIE;  /*SMCLK, up/down mode, clear TBR, enable TBIFG*/ \
  }while(0);
  
/*
*  this is my main function
*/
int main(void) {
  STOP_WDT();   // Stop watchdog timer
  Init_Port();  // had better to be the 2nd
  Init_MAX_Clock(); // For simulator debugging, please comment this line
  
  Init_4keys_keyboard();
  Init_driver_EN();
  Init_Relay_Protection();
  Init_ADC();
  
  Init_My_Nokia_5110();
  My_LCD_write_cmd(0x40);
  My_LCD_write_cmd(0x80);
  __delay_cycles(DELAY_CYCLES_BETWEEN_CMD_AND_DATA);
  My_LCD_write_string(Set_voltage);
  
  My_LCD_write_cmd(0x41);
  My_LCD_write_cmd(0x80);
  __delay_cycles(DELAY_CYCLES_BETWEEN_CMD_AND_DATA);
  My_LCD_write_string(Real_voltage);
  
  Wait_for_USCI_A0_TX_buffer_ready();     // Wait for USCI A0 X buffer ready
  UCA0TXBUF = 0x00;
  
  // about LED
  P10DIR |= 0x0F;
  P10OUT &= ~0x0F;
  
  
  Init_TimerB();
  __EINT();  // my macro: #define __EINT() __enable_interrupt()
  for(;;) {
    LED3_ON(); // for test
    if(Display_data_changed){
    Update_LCD_num_content(); 
    LCD_display_update();       
    Display_data_changed = 0;
    LED1_ON();
    //__NOP();  // for debugging
    }
  }
}

/*
*   Timer B ISR
*/
// Timer B0 interrupt service routine
#pragma vector = TIMERB0_VECTOR
__interrupt void TIMERB0_ISR(void){
  LED2_ON();  // for test
  ADC_Sample_times++;
  if(ADC_Sample_times <= Num_of_Results){
    Start_ADC12();
    ADC_RESULT_OBTAINED_FLAG = 1;
  }
  if(ADC_Sample_times == 25){    // 20 changed to 40
    ADC_Sample_times = 0;
    
  }
}

// Timer_B1 Interrupt Vector (TBIV) handler
#pragma vector=TIMERB1_VECTOR
__interrupt void TIMERB1_ISR(void)
{
  /* Any access, read or write, of the TBIV register automatically resets the
  highest "pending" interrupt flag. */
  switch( __even_in_range(TBIV,14) )
  {
  case 14: 
    if(ADC_RESULT_OBTAINED_FLAG){
      PERMMIT_GET_ADC_DATA();              // overflow
    }
    break;
  case  0: break;                          // No interrupt
  case  2: break;                          // CCR1 not used
  case  4: break;                          // CCR2 not used
  case  6: break;                          // CCR3 not used
  case  8: break;                          // CCR4 not used
  case 10: break;                          // CCR5 not used
  case 12: break;                          // CCR6 not used
  default: break;
  }
}

当我使用 MSP-FET430UIF 调试代码时、我发现 LED3和 LED2都可以亮起。但是、在我将代码下载到芯片中并在硬件中重置芯片后、我发现 LED2无法正常工作。我可以确认所有 LED 未损坏。因此、我似乎没有进入 Timer B ISR、这看起来很奇怪。我已经不能被压碎了。如果有人能帮助我，我会非常感激。

可以在 My GitHub 代表(https://github.com/eexu/27_Parallel_Operation_of_Two_Buck)上看到整个项目

4 年多前