Waiting For Device Connection...
USB PORT: SPRD U2S Diag (COM40)
Port: SPRD U2S Diag (COM40)
Manufacturer: UNISOC Communications Inc.
OPEN COM PORT... OK
Waiting for server........ OK
Load fdl loaders... OK
Handshake FDL... OK
Boot id: SPRD3
Sending FDL... OK
Handshake NAND_FDL... FAIL
[PROTOCOL ERR] FRAME CHECKSUM MISMATCHED
USB PORT: SPRD U2S Diag (COM40)
Port: SPRD U2S Diag (COM40)
Manufacturer: UNISOC Communications Inc.
OPEN COM PORT... OK
Waiting for server........ OK
Load fdl loaders... OK
Handshake FDL... OK
Boot id: SPRD3
Sending FDL... OK
Handshake NAND_FDL... FAIL
[PROTOCOL ERR] FRAME CHECKSUM MISMATCHED