User`s manual

High Performance Low Cost Embedded Systems
3.1.16 Serial Port Assistant
Note: before start this program please connect the serial port your want to test to your board.
- The on board CON1, 2 and 3 are CPU UART0, 1 and 2. UART0 has been converted to
RS232, and extended to COM0 via DB9. On system startup it has been set to the console terminal, so
it cannot be tested via this utility. The other two ports CON2 and 3 must be converted to RS232 before
they can communicate with a PC serial port. (FriendlyARM has a “OneCom” RS232 conversion
module) When connect the ports to a PC, please make sure to use a correct serial cable (cross serial
line or direct serial line). When connect the OneCom module’s COM2 and COM3 make sure they
match your cable
- This program also supports common USB to Serial cables. Now most laptops don’t have serial ports.
For the sake of users most of our agents provide those conversion cables. Connecting a USB to Serial
cable to your board, you can extend your serial ports. Its device name generally is “/dev/ttyUSB0, 1,
2 and 3”, which implies you can use a USB hub to extend your serial ports.
In the “FriendlyARM” subgroup, click on the “Serial Port Assistant” icon to start the interface
below:
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