为什么进入LPM3，电流还有20MA-第2页回答

为什么进入LPM3，电流还有20MA

2019-03-24 08:58发布

通过RTC中断1S唤醒
void main(void)
{
      WM_Initialize();             // System initialize

      // Display "123456"
  LCD_Display0_8();

  while(1)
      {
      __bis_SR_register(LPM3_bits + GIE); // 进入 LPM3 w/ interrupt
      }
}

void WM_Initialize(void)
{
      WDTCTL = WDTPW + WDTHOLD;       // Stop watchdog
      //       WDTCTL = WDTPW + WDTCNTCL + WDTSSEL0 + WDTIS0 + WDTIS1;  // Set watchdog 16s

      PM5CTL0 &= ~LOCKLPM5;             // Disable the GPIO power-on default high-impedance mode
                                                            // to activate previously configured port settings
      GPIO_Config();             // GPIO initialize
      CLOCK_Config();          // System clock initialize
      LCD_Config();             // LCD module initialize
      RTC_Config();
      //P1SEL0 |= BIT5;  //配置P15为输入脚  20160506
   //       P1REN |= BIT5;
      //P1REN &= ~BIT5; // to be comment  20160506
      //TA0CTL = 0;  20160506
}
void CLOCK_Config()
{
      P4SEL0 |= BIT1 + BIT2;                // Select pin4.1 pin4.2 as crystal function
      do
      {
            CSCTL7 &= ~(XT1OFFG + DCOFFG);          // Clear XT1 and DCO fault flag  清除 XT1 DCO 失效标志
            SFRIFG1 &= ~OFIFG;
      }while (SFRIFG1 & OFIFG);                   // Test oscillator fault flag  如果失效标志存在

      CSCTL4 = SELA__XT1CLK;                                     // IMPORTANT. Select ACLK = XT1 = 32768Hz
}
void LCD_Config()
{
      uint8_t ui8Cnt;
      uint8_t *pLCD = (uint8_t *)&LCDM0;
      for (ui8Cnt = 13; ui8Cnt > 0; ui8Cnt--)                      // Clear LCD memory
            *pLCD++ = 0x00;                                     // CLR LCD

      SYSCFG2 |= LCDPCTL;                            // R13/R23/R33/LCDC1/LCDC2 pins selected  设置 LCD功耗

      LCDPCTL0 = 0xFFFF;
      LCDPCTL1 = 0x01FF;                                     //设置 LCD管脚 L0~L24 pins selected

      LCDVCTL = LCDSELVDD + LCDCPEN;             // Mode 2 设置降低LCD 功耗片上电荷泵

      LCDCSSEL0 = 0x000F;                                     // 设置公共极  COM0~3
      LCDCSSEL1 = 0x0000;

  LCDM0 = 0x21;                                           // L0 = COM0, L1 = COM1
  LCDM1 = 0x84;

      LCDCTL0 |= LCD4MUX + LCDLP + LCDON;       // 打开LCD: 4-mux 模式
}
void RTC_Config()
{
      RTCCTL = RTCSS__XT1CLK + RTCSR + RTCPS__1 | RTCIE;
      RTCMOD = 32768-1;                            //1s
      tRTCData.ui8Year = 14;             // RTC initialize
      tRTCData.ui8Month = 7;
      tRTCData.ui8Day = 30;
      tRTCData.ui8Hour = 23;
      tRTCData.ui8Minute = 59;
      tRTCData.ui8Second = 55;
}
// RTC interrupt service routine
#pragma vector=RTC_VECTOR
__interrupt void RTC_ISR(void)
{
      switch(__even_in_range(RTCIV,RTCIV_RTCIF))
      {
      case RTCIV_NONE: break;          // No interrupt

      case RTCIV_RTCIF:                // RTC Overflow
      {
            uint8_t ui8Days = 31;
            uint8_t *pAddress;             // For monthly data storage

            tRTCData.ui8Second++;
。。。
            __low_power_mode_off_on_exit();  //退出中断时唤醒CPU
      }
      break;
      default: break;
      }
}
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