How to debug

USB2UART Bridge

There are plenty types of usb to uart bridge in the market . Most of them use the following chip :

• CP210X
• PL2303
• CH340

Hardware PIN define

RSB4680 debug port pin define : 

PIN	PIN Name
1	NC
2	TX
3	RX
4	GND

Note : 

Please connect device's TX to usb2uart adapter's RX and device's RX to usb2uart adapter's TX .

UART parameter

• BaudRate：115200
• DataBits  ：8
• StopBits  ：1
• Parity      ：None
• FlowControl：None or XON/XOFF

Debug on windows

Install usb2uart adapter's driver. Connect adapter to PC , you will find COM port like :

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.

Debug on Ubuntu

"Kermit" and "MiniCom" are very famous tools on Ubuntu.

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