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SM470R1B1MHFQS调试失败

Wed Mar 13, 2019 17:31:39: execUserFlashInit
Wed Mar 13, 2019 17:31:39: Executing memory setup macro dddd B1M Flash
Wed Mar 13, 2019 17:31:47: Fatal error: There were warnings during download of FLASH loader, see Log Window   Session aborted!
Wed Mar 13, 2019 17:31:47: Failed to load flash loader: C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.2\arm\config\flashloader\TexasInstruments\FlashTMS470R1B1M.out

J-Link V5.00 DLL Log
DLL Compiled: Jun  8 2015 21:22:48
Logging started @ 2019-03-13 17:32

Connecting ...
 - Connecting via USB to J-Link device 0
 - Target interface speed: 1000 kHz (Fixed)
 - VTarget = 3.222V
 - Initializing CPU core (Init sequence) ...
    - Initialized successfully
 - Target interface speed: 12000 kHz (Fixed)
 - ERROR: Could not detect CPU clock speed. Readback of test code downloaded into RAM failed.
 - ERROR: Failed to measure CPU clock frequency
 - ERROR: Failed to connect.
Could not determine CPU clock frequency.