====== BananaPi R2 - Debug-UART ======

  *  USB2Serial-Adapter (e.g. CP2102 or FTDI, known problems with Profilic- and ch340g-Chipsets)
  *  using Uart-Pins (not 40-pin-connector)
  *  each TX => RX (r2 tx to rx of usb2serial, tx of usb2serial to r2 rx)
  *  application for PC:
    * Linux: minicom
    * Windows: putty
  *  settings: 115200 8N1 FlowControl: off

{{:bpi-r2:bpir2_uart.jpg?400|}}

micro-usb-cp2102-adapter:
https://www.ebay.de/itm/CP2102-MICRO-USB-to-UART-TTL-Module-6-Pin-Serial-Converter-STC-Replace-FT232/401269171476

===== configurating Putty =====

Windows-driver for CP2102: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
{{ :bpi-r2:cp210x_universal_windows_driver.zip |}}

{{:bpi-r2:putty-serial.png?direct&200|}}

reg-file Putty-session (com-port must be changed): {{ :bpi-r2:bpi-r2-serial-putty-reg.zip |}}

===== configurating minicom =====

first get name of device:
  grep ttyUSB /var/log/syslog
  Oct 15 12:44:59 Frank-Laptop kernel: [ 5113.456306] usb 3-1: cp210x converter now attached to ttyUSB0

  ls -l /dev/ttyUSB0
  crw-rw---- 1 root dialout 188, 0 Mai 10 15:12 /dev/ttyUSB0
  #add current user to group dialout (for access to tty-device)
  sudo adduser $USER dialout
  #login/logout needed to join the group
  #show groups of the user
  groups
  frank adm dialout cdrom sudo dip plugdev lpadmin sambashare

Install minicom & setup
  sudo apt-get install minicom
  sudo minicom -s

            +-----[configuration]------+
            | Filenames and paths      |
            | File transfer protocols  |
            | Serial port setup        |  <<<<<<<<<<<<
            | Modem and dialing        |
            | Screen and keyboard      |
            | Save setup as dfl        |
            | Save setup as..          |
            | Exit                     |
            | Exit from Minicom        |
            +--------------------------+

    +-----------------------------------------------------------------------+
    | A -    Serial Device      : /dev/ttyUSB0                              |
    | B - Lockfile Location     : /var/lock                                 |
    | C -   Callin Program      :                                           |
    | D -  Callout Program      :                                           |
    | E -    Bps/Par/Bits       : 115200 8N1                                |
    | F - Hardware Flow Control : No                                        |
    | G - Software Flow Control : No                                        |
    |                                                                       |
    |    Change which setting?                                              |
    +-----------------------------------------------------------------------+

  * "save as .dfl"
  * "Exit from Minicom"

now start minicom as user (without sudo)

exit with Ctrl+a,q or Ctrl+a,x