请教！MSP430FR6972 jtag下载失败

#include <msp430.h>

int main(void)
{
  WDTCTL = WDTPW | WDTHOLD;

  // Configure GPIO
  P1OUT = 0;
  P1DIR = 0xFF;

  P2OUT = 0;
  P2DIR = 0xFF;

  P3OUT = 0;
  P3DIR = 0xFF;

  P4OUT = 0;
  P4DIR = 0xFF;

  P5OUT = 0;
  P5DIR = 0xFF;

  P6OUT = 0;
  P6DIR = 0xFF;

  P7OUT = 0;
  P7DIR = 0xFF;

  P9OUT = 0;
  P9DIR = 0xFF;

  PJOUT = 0;
  PJSEL0 = BIT4 | BIT5;                     // For XT1
  PJDIR = 0xFFFF;

  // Disable the GPIO power-on default high-impedance mode to activate
  // previously configured port settings
  PM5CTL0 &= ~LOCKLPM5;

  // XT1 Setup
  CSCTL0_H = CSKEY >> 8;                    // Unlock CS registers
  CSCTL1 = DCOFSEL_0;                       // Set DCO to 1MHz
  CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
  CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;     // Set all dividers to 1
  CSCTL4 &= ~LFXTOFF;                       // Enable LFXT1
  do
  {
    CSCTL5 &= ~LFXTOFFG;                    // Clear XT1 fault flag
    SFRIFG1 &= ~OFIFG;
  }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag
  CSCTL0_H = 0;                             // Lock CS registers

  __bis_SR_register(LPM3_bits);
}

使用官网的LPM3低功耗程序下载到调试板上后，再下载程序就下载失败了。

检测到TEST引脚一直为低。

望赐教啊！！！

gaoyang9992006：

点重试，然后按系统复位试试看。或者换其他下载接口下载试试。