EZ430-RF2500

测功耗这个问题 ，我想标定他处于LPM3模式的时间长度，怎么测呢，电流只有几微安，串联电阻用示波器也看不了，本身示波器悬空就有10几毫伏电压。请问️什么方法吗，因为我程序里面设置了几种不同模式，所以想要标定时间

我这边有MSP430-FET，请问有具体测量方法，你好像没具体说到结合FET怎么做到energy trace，谢谢

在LMP3下，ACLK remains active.

您可以使用定时器timer将ACLK设为时钟源，产生定时中断来从LPM3模式下唤醒芯片

例程中给出的是WDT来唤醒，您可以参考一下

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 *                       MSP430 CODE EXAMPLE DISCLAIMER
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//******************************************************************************
//  MSP430F22x4 Demo - Basic Clock, LPM3 Using WDT ISR, 32kHz ACLK
//
//  Description: This program operates MSP430 normally in LPM3, pulsing P1.0
//  at 4 second intervals. WDT ISR used to wake-up system. All I/O configured
//  as low outputs to eliminate floating inputs. Current consumption does
//  increase when LED is powered on P1.0. Demo for measuring LPM3 current.
//  ACLK = LFXT1/4 = 32768/4, MCLK = SMCLK = default DCO ~1.2MHz
//  //* External watch crystal on XIN XOUT is required for ACLK *//
//
//           MSP430F22x4
//         ---------------
//     /|\|            XIN|-
//      | |               | 32kHz
//      --|RST        XOUT|-
//        |               |
//        |           P1.0|-->LED
//
//  A. Dannenberg
//  Texas Instruments Inc.
//  April 2006
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.41A
//******************************************************************************
#include <msp430.h>

volatile unsigned int i;

int main(void)
{
  BCSCTL1 |= DIVA_2;                        // ACLK/4
  WDTCTL = WDT_ADLY_1000;                   // WDT 1s/4 interval timer
  IE1 |= WDTIE;                             // Enable WDT interrupt
  P1DIR = 0xFF;                             // All P1.x outputs
  P1OUT = 0;                                // All P1.x reset
  P2DIR = 0xFF;                             // All P2.x outputs
  P2OUT = 0;                                // All P2.x reset
  P3DIR = 0xFF;                             // All P3.x outputs
  P3OUT = 0;                                // All P3.x reset
  P4DIR = 0xFF;                             // All P4.x outputs
  P4OUT = 0;                                // All P4.x reset

  while(1)
  {
    __bis_SR_register(LPM3_bits + GIE);     // Enter LPM3, enable interrupts
    P1OUT |= 0x01;                          // Set P1.0 LED on
    for (i = 5000; i > 0; i--);             // Delay
    P1OUT &= ~0x01;                         // Clear P1.0 LED off
  }
}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = WDT_VECTOR
__interrupt void watchdog_timer(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(WDT_VECTOR))) watchdog_timer (void)
#else
#error Compiler not supported!
#endif
{
  __bic_SR_register_on_exit(LPM3_bits);     // Clear LPM3 bits from 0(SR)
}

请问IAR可以做energy trace不 还是说一定要用CCS软件呢

应该是浏览器问题，我这边使用的是谷歌浏览器，可以打开的

不需要安装插件，那您点击Emulator是否可以点击下面的选项？

• State Log

• Power Log

• Timeline

• Function Profiler