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用CCS Uniflash 给CC3100BOOST 更新最新Service Pack 出现的问题,请问是怎么回事,怎样解决

Other Parts Discussed in Thread: UNIFLASH, CC3100

[17:15:29] Begin GetVersion operation.
[17:15:30] INFO: > Executing Operation: Connect
[17:15:32] INFO: setting break signal
[17:15:32] INFO: --- please restart the device ---
[17:15:47] ERROR: ---reading ACK signal failed---
[17:15:47] WARNING: ---seting break signal to false failed---
[17:15:49] INFO: setting break signal
[17:15:49] INFO: --- please restart the device ---
[17:16:04] ERROR: ---reading ACK signal failed---
[17:16:04] WARNING: ---seting break signal to false failed---
[17:16:06] INFO: setting break signal
[17:16:06] INFO: --- please restart the device ---
[17:16:21] ERROR: ---reading ACK signal failed---
[17:16:21] WARNING: ---seting break signal to false failed---
[17:16:23] INFO: setting break signal
[17:16:23] INFO: --- please restart the device ---
[17:16:38] ERROR: ---reading ACK signal failed---
[17:16:38] WARNING: ---seting break signal to false failed---
[17:16:39] FATAL: --- Can't connect to device !! ---
[17:16:39] FATAL: Error connecting to the device. Please check your COM port settings. Error code: -3
[17:16:39] INFO: > Executing Operation: Disconnect
[17:16:39] Operation GetVersion returned.