Serial Port Test

Note: before start this program please connect the serial port your want to test to your board.
- The on board CON1, 2, 3 and 4 are CPU UART0, 1, 2 and 3. 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 three ports CON2, 3 and 4 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).
- 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.

Connect your serial port extension board to the Mini6410’s CON2/3/4 and connect to a PC via a crossover serial cable. 

Go to the “FriendlyARM” tab and click on the “serial port assistant” icon to open the interface.

The title bar of the utility shows the default setting is “ttySAC1 115200 8N1 [C]”, and it implies the default port is:

  • - Serial Port Deivce: /dev/ttySAC1, it corresponds to the second port UART1
  • - Bits Per Second: 115200
  • - Data Bits: 8
  • - Flow Control: None
  • - Stop Bits: 1
  • - [C]: stands for the character mode; [H] stands for Hex

There are two edit areas in the interface, the top one shows received data which cannot be edited; the bottom one shows sent data which can be edited via a USB keyboard or a soft keyboard.
Click on the “Connect” button to open “/dev/ttySAC1”, type some characters in the edit area, click on the “Send” button and it will send data to the connected serial port device. The screenshot below shows what a Windows super terminal receives (Note: the settings for this super terminal should be 115200 8N1)

Click on “Disconnect” to disconnect the connection. Click on “Setting…” to enter the parameter setting interface which lists some basic serial port parameters:
Comm Port: you can choose “/dev/ttySAC0,1,2” or the USB to Serial “/dev/ttyUSB0,1,2,3”. Note: in this utility, SAC0 corresponds to CON1, SAC1 corresponds to CON2 and etc.
Speed: bits per second
Data: data bits, 8 or 7, usually 8.
Hex: input and output data in Hex format.

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