Debug on Rockchip platform-based Boards via Debug Serial Port
1. Introduction
There is no limitation by this method.
2. Preparatory Tools
- Host computer
- USB to Uart Cable
- Debug Cable
3. Hardware PIN define
TBD
4. UART parameter
- BaudRate：115200
- DataBits ：8
- StopBits ：1
- Parity ：None
- FlowControl：None or XON/XOFF
5. Debug on windows
5.1 Install usb2uart adapter's driver
There are plenty types of usb to uart bridge in the market . Most of them use the following chip :
Install usb2uart adapter's driver. Connect adapter to PC , you will find COM port like :
5.2 Download Tools
Putty is very populate tool on Windows. Download putty here.
Run PUTTY.exe, select Connection type of "Serial" , input COM port found in Device Manager.
Set Parameter like :
Then Click "Open" to start debug console.
6. Debug on Ubuntu
Connect adapter to PC , find COM port :
$ ls /dev/ttyUSB*
/dev/ttyUSB0
"Kermit" and "MiniCom" are very famous tools on Ubuntu.
6.1 Kermit
Install Kermit :
sudo apt-get update
sudo apt-get install ckermit
Config Kermit :
vi $HOME/.kermrc;
Input the following content :
set line /dev/ttyUSB0
set speed 115200
set carrier-watch off
set handshake none
set flow-control none
robust
set file type bin
set file name lit
set rec pack 1000
set send pack 1000
set window 5
Change "/dev/ttyUSB0" according your system, Use Command "ls /dev/ttyUSB*" .
Run kermit
sudo kermit
6.2 MiniCom
Install MiniCom:
sudo apt-get update
sudo apt-get install minicom
Run MiniCom
$ sudo minicom
Welcome to minicom 2.7
OPTIONS: I18n
Compiled on Jan 1 2014, 17:13:19.
Port /dev/ttyUSB0, 15:57:00
Press CTRL-A Z for help on special keys
According the tips, press CTRL-A, then press Z to show help.
+-------------------------------------------------------------------+
Minicom Command Summary |
| |
| Commands can be called by CTRL-A <key> |
| |
| Main Functions Other Functions |
| |
| Dialing directory..D run script (Go)....G | Clear Screen.......C |
| Send files.........S Receive files......R | cOnfigure Minicom..O |
| comm Parameters....P Add linefeed.......A | Suspend minicom....J |
| Capture on/off.....L Hangup.............H | eXit and reset.....X |
| send break.........F initialize Modem...M | Quit with no reset.Q |
| Terminal settings..T run Kermit.........K | Cursor key mode....I |
| lineWrap on/off....W local Echo on/off..E | Help screen........Z |
| Paste file.........Y Timestamp toggle...N | scroll Back........B |
| Add Carriage Ret...U |
| |
| Select function or press Enter for none. |
+--------------------------------------------------------------------+
According the tips, press O to show configuration.
+-----[configuration]------+
| Filenames and paths |
| File transfer protocols |
| Serial port setup |
| Modem and dialing |
| Screen and keyboard |
| Save setup as dfl |
| Save setup as.. |
| Exit |
+--------------------------+
Press "↓"， move cursor to "Serial port setup" to Config parameter.
Then press "A"-"G" to set relative content as following :
+-----------------------------------------------------------------------+
| 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? |
+-----------------------------------------------------------------------+
When configuration is done, back to choose "Save setup as dfl" to save as default configuration.