CC3200 FORMAT的时候，总是出现下面的提示：
[16:03:10] Begin Format operation.
[16:03:12] INFO: > Executing Operation: Connect
[16:03:14] INFO: setting break signal
[16:03:14] INFO: --- please restart the device ---
[16:03:16] INFO: connection succeeded
[16:03:16] INFO: getting storage list
[16:03:16] INFO: > Executing Operation: Init
[16:03:16] INFO: reading version info
[16:03:16] INFO: DEVICE CC3200 ES1.33
[16:03:16] INFO: reading version info
[16:03:17] INFO: reading version info
[16:06:12] FATAL: Error loading the bootloader. Error code: -3
[16:06:12] INFO: > Executing Operation: Disconnect
[16:06:27] Operation Format returned.
[16:06:12] FATAL: Error loading the bootloader. Error code: -3，这是什么意思？
