MSP430FR2033功耗问题

Hi all

          我在做一个项目，需要用到RTC的低功耗模式 ，但我实测发现上电后的功耗是0.4uA，但执行完第一次中断程序后，之后不管进入多少次中断，进入RTC低功耗模式都是12.6uA。我试过和定时时间没关系，第一次中断前都是0.4uA。请问是我需要在每次再次进入低功耗时都需要重新配置下RTC吗？

//MSP430FR413x Demo - RTC, device enter LPM3.5 and toggle P1.0 in RTC interrupt handling every 1s
//
//
//Description: Device enter LPM3.5 after configuring the RTC. The RTC wakes
//the device up from LPM3.5 every second and toggles P1.0.
//It also stores the state of P0OUT in the Backup RAM Registers.
//
//ACLK = XT1 = 32kHz, MCLK = SMCLK = default DCODIV = ~1MHz.
//
//MSP430FR4133
//-----------------
///|\||
//| ||
//| |XIN(P4.1)|--
//--|RST|  ~32768Hz
//|XOUT(P4.2)|--
//||
//|P4.5|-->LED
//
//  Wei Zhao
//  Texas Instruments Inc.
//  March 2015
//  Built with IAR Embedded Workbench v6.20 & Code Composer Studio v6.1
//******************************************************************************
#include <msp430.h>

void initGpio(void);

int main(void)
{WDTCTL = WDTPW | WDTHOLD;// Stop WDTinitGpio();// Configure GPIO// Initialize XT1 32kHz crystalP4SEL0 |= BIT1 | BIT2;// set XT1 pin as second functiondo{CSCTL7 &= ~(XT1OFFG | DCOFFG);// Clear XT1 and DCO fault flagSFRIFG1 &= ~OFIFG;} while (SFRIFG1 & OFIFG);// Test oscillator fault flag// First determine whether we are coming out of an LPMx.5 or a regular RESET.if (SYSRSTIV == SYSRSTIV_LPM5WU)// When woken up from LPM3.5, reinit{// If MCU wakes up from LPM3.5, re-init and then return to LPM3.5 again.// Restore P1OUT value from backup RAM memory, keep P1OUT after LPMx.5 resetP4OUT = *(unsigned int *)BKMEM_BASE;__enable_interrupt();// The RTC interrupt should trigger now...}else{// Device powered up from a cold start.// It configures the device and puts the device into LPM3.5// Configure backup memory*(unsigned int *)BKMEM_BASE = 0;// Initialize RTC// Interrupt and reset happen every 1024/32768 * 32 = 1 sec.RTCMOD = 960-1;RTCCTL = RTCSS__XT1CLK | RTCSR | RTCPS__1024 | RTCIE;// Store P1OUT value in backup memory register before enter LPM3.5*(unsigned int *)BKMEM_BASE = P4OUT;}// Enter LPM3.5 mode with interrupts enabled. Note that this operation does// not return. The LPM3.5 will exit through a RESET event, resulting in a// re-start of the code.PMMCTL0_H = PMMPW_H;// Open PMM Registers for writePMMCTL0_L |= PMMREGOFF;// and set PMMREGOFF__bis_SR_register(LPM3_bits | GIE);__no_operation();return 0;
}

void initGpio(void)
{
		P1DIR |= 0x1F;
		P2DIR |= 0xFF;
		P3DIR |= 0xFF;
		P4DIR |= 0xFF;
		P5DIR |= 0xFF;
		P6DIR |= 0xFF;
		P7DIR |= 0xFF;
		P8DIR |= 0xFD;

		P1OUT |= 0x1F;
		P2OUT |= 0xFF;
		P3OUT |= 0xFF;
		P3OUT &= ~0x87;
		P4OUT |= 0xFF;
		P5OUT |= 0xFF;
		P6OUT |= 0xFF;
		P7OUT |= 0xFF;
		P8OUT |= 0xFD;

		P8DIR &= ~0x02;
		P8REN &= ~0x02;

		//Motor P1.6 1.7 1.5
		P1DIR &= ~0xE0;
		P1REN &= ~0xE0;

		P2DIR &= ~0xF3;
		P2REN &= ~0xF3;// Disable the GPIO power-on default high-impedance mode// to activate previously configured port settingsPM5CTL0 &= ~LOCKLPM5;
}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = RTC_VECTOR
__interrupt void RTC_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(RTC_VECTOR))) RTC_ISR (void)
#else
#error Compiler not supported!
#endif
{switch(__even_in_range(RTCIV, RTCIV_RTCIF)){case RTCIV_NONE : break;// No interrupt pendingcase RTCIV_RTCIF:// RTC Overflow// Toggle LED on P1.0P4OUT ^= BIT5;// Store P1OUT value in backup memory register*(unsigned int *)BKMEM_BASE = P4OUT;__bis_SR_register(LPM3_bits | GIE);break;default:break;}
}

灰小子：

看那个中断函数里有对io的操作，io也是要消耗电流的

Ling Zhu2：

yanqing zhou

Hi all

          我在做一个项目，需要用到RTC的低功耗模式 ，但我实测发现上电后的功耗是0.4uA，但执行完第一次中断程序后，之后不管进入多少次中断，进入RTC低功耗模式都是12.6uA。我试过和定时时间没关系，第一次中断前都是0.4uA。请问是我需要在每次再次进入低功耗时都需要重新配置下RTC吗？

//MSP430FR413x Demo - RTC, device enter LPM3.5 and toggle P1.0 in RTC interrupt handling every 1s
//
//
//Description: Device enter LPM3.5 after configuring the RTC. The RTC wakes
//the device up from LPM3.5 every second and toggles P1.0.
//It also stores the state of P0OUT in the Backup RAM Registers.
//
//ACLK = XT1 = 32kHz, MCLK = SMCLK = default DCODIV = ~1MHz.
//
//MSP430FR4133
//-----------------
///|\||
//| ||
//| |XIN(P4.1)|--
//--|RST|~32768Hz
//|XOUT(P4.2)|--
//||
//|P4.5|-->LED
//
//Wei Zhao
//Texas Instruments Inc.
//March 2015
//Built with IAR Embedded Workbench v6.20 & Code Composer Studio v6.1
//******************************************************************************
#include <msp430.h>void initGpio(void);int main(void)
{WDTCTL = WDTPW | WDTHOLD;// Stop WDTinitGpio();// Configure GPIO// Initialize XT1 32kHz crystalP4SEL0 |= BIT1 | BIT2;// set XT1 pin as second functiondo{CSCTL7 &= ~(XT1OFFG | DCOFFG);// Clear XT1 and DCO fault flagSFRIFG1 &= ~OFIFG;} while (SFRIFG1 & OFIFG);// Test oscillator fault flag// First determine whether we are coming out of an LPMx.5 or a regular RESET.if (SYSRSTIV == SYSRSTIV_LPM5WU)// When woken up from LPM3.5, reinit{// If MCU wakes up from LPM3.5, re-init and then return to LPM3.5 again.// Restore P1OUT value from backup RAM memory, keep P1OUT after LPMx.5 resetP4OUT = *(unsigned int *)BKMEM_BASE;__enable_interrupt();// The RTC interrupt should trigger now...}else{// Device powered up from a cold start.// It configures the device and puts the device into LPM3.5// Configure backup memory*(unsigned int *)BKMEM_BASE = 0;// Initialize RTC// Interrupt and reset happen every 1024/32768 * 32 = 1 sec.RTCMOD = 960-1;RTCCTL = RTCSS__XT1CLK | RTCSR | RTCPS__1024 | RTCIE;// Store P1OUT value in backup memory register before enter LPM3.5*(unsigned int *)BKMEM_BASE = P4OUT;}// Enter LPM3.5 mode with interrupts enabled. Note that this operation does// not return. The LPM3.5 will exit through a RESET event, resulting in a// re-start of the code.PMMCTL0_H = PMMPW_H;// Open PMM Registers for writePMMCTL0_L |= PMMREGOFF;// and set PMMREGOFF__bis_SR_register(LPM3_bits | GIE);__no_operation();return 0;
}void initGpio(void)
{P1DIR |= 0x1F;P2DIR |= 0xFF;P3DIR |= 0xFF;P4DIR |= 0xFF;P5DIR |= 0xFF;P6DIR |= 0xFF;P7DIR |= 0xFF;P8DIR |= 0xFD;P1OUT |= 0x1F;P2OUT |= 0xFF;P3OUT |= 0xFF;P3OUT &= ~0x87;P4OUT |= 0xFF;P5OUT |= 0xFF;P6OUT |= 0xFF;P7OUT |= 0xFF;P8OUT |= 0xFD;P8DIR &= ~0x02;P8REN &= ~0x02;//Motor P1.6 1.7 1.5P1DIR &= ~0xE0;P1REN &= ~0xE0;P2DIR &= ~0xF3;P2REN &= ~0xF3;// Disable the GPIO power-on default high-impedance mode// to activate previously configured port settingsPM5CTL0 &= ~LOCKLPM5;
}#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = RTC_VECTOR
__interrupt void RTC_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(RTC_VECTOR))) RTC_ISR (void)
#else
#error Compiler not supported!
#endif
{switch(__even_in_range(RTCIV, RTCIV_RTCIF)){case RTCIV_NONE : break;// No interrupt pendingcase RTCIV_RTCIF:// RTC Overflow// Toggle LED on P1.0P4OUT ^= BIT5;// Store P1OUT value in backup memory register*(unsigned int *)BKMEM_BASE = P4OUT;__bis_SR_register(LPM3_bits | GIE);break;default:break;}
}