mini USB B 10 pin connector
used in dashcams for differen purposes like GPS connect, detect car power and start recording (and not start recording when charge at home).
UART 3.3v (TX0 RX0) in SAMOON B03F (NOUS NF9) baseboard are both available at surface
and could be accessed without device dissasemble using 10pin USB.
USB to 3.3v UART convertors
CH340 or FTDI232RL.
Both work at Windows 10 and support 3.3v
Firmware upload with UART using XMODEM
26 MB firmware will upload in 75 minutes on 115200 baud
amboot> help The following commands are supported: help bios boot diag dump erase nand_erase exec hal hotboot r8 r16 r32 reboot reset setenv setmem show usbdl w8 w16 w32 xmdl Use 'help' to get help on a specific command amboot> help show Help for 'show': Usage: show logo - boot loader logo show flash - flash info and allocation scheme show ptb - flash partition table show meta - flash meta table show bb - show NAND bad blocks show wifi - show wifi infomations show usb_eth - show usb ethernet infomations show netboot - netboot parameters show prog_log - show the last firmware upgrade log Display various system properties amboot> show bb ----- Initial bad blocks ----- 216 300 357 375 966 1762 1788 1925 Total bad blocks: 8 amboot> show ptb bst: 0xd4708565 1.3 (2014/9/4) 0x00000000 0x00000001 (2048) bld: 0x75cee77e 1.3 (2014/9/4) 0xc0000000 0x00000000 (133284) hal: 0xaecab8f1 5.1 (2014/9/4) 0xc00a0000 0x00000000 (62556) pri: 0x9547a369 0.1 (2014/9/4) 0xc0100000 0x00000000 (7024644) rom: 0xfca6faf5 2.0 (2014/9/4) 0x00000000 0x00000001 (8828928) dsp: 0x9db73a14 0.1 (2014/9/4) 0xc82fffb0 0x00000000 (4177920) S/N: usbdl_mode: 0 auto_boot: 1 cmdline: "osd=8bit record_fmt=mov_aac emergency_type=prec_non_overlapped" amboot> help xmdl Help for 'xmdl': Usage: xmdl [address] [exec] xmdl firmware Download binary image to target memory address over UART using the XMODEM protocol amboot> xmdl firmware download to 0xc0100000 start sending using the XMODEM protocol... press ^X to quit
