=== LOG ===
Waiting For Device Connection... 
USB PORT: SPRD U2S Diag (COM21)
Port: SPRD U2S Diag (COM21)
Manufacturer: UNISOC Communications Inc.
OPEN COM PORT... OK
Waiting for server........ OK
Handshake NAND_FDL... OK
Boot version: SPRD3
Sending payload... OK
Sending preloader... OK
Sending nand_fdl loader... OK
Update partitions table... OK
Erase default partitions
 Erase uboot_log... OK
 Erase l_runtimenv1... OK
 Erase misc... OK
Flash splloader > Size: 0.00 bytes... OK
Flash vbmeta > Size: 1.00 MB... OK
Flash l_modem > Size: 25.00 MB... OK
Flash l_deltanv > Size: 1.00 MB... OK
Flash l_ldsp > Size: 20.00 MB... OK
Flash l_gdsp > Size: 10.00 MB... OK
Flash pm_sys > Size: 1.00 MB... OK
Flash gpsgl > Size: 1.00 MB... OK
Flash gpsbd > Size: 1.00 MB... OK
Flash wcnmodem > Size: 10.00 MB... OK
Flash boot > Size: 35.00 MB... OK
Flash dtb > Size: 8.00 MB... OK
Flash dtbo > Size: 8.00 MB... OK
Flash recovery > Size: 40.00 MB... OK
Flash system > Size: 1.95 GB... OK
Flash userdata > Size: 0.00 bytes... OK
Flash logo > Size: 3.00 MB... OK
Flash fbootlogo > Size: 3.00 MB... OK
Flash cache > Size: 150.00 MB... OK
Flash trustos > Size: 6.00 MB... OK
Flash sml > Size: 1.00 MB... OK
Flash vendor > Size: 300.00 MB... OK
Flash product > Size: 100.00 MB... OK
Flash persist > Size: 2.00 MB... OK
Flash uboot > Size: 1.00 MB... OK
Rebooting... OK
Elapsed Time: 2 mins, 11 secs, 539 msecs
Total WRITE Data: 2.50 GB
Operating speed: 19.44 MB/s