During programming BASICtools is used to load the users ARMbasic program. But once the user's ARMbasic program is running the USB port may be used to communicate data back to the PC.
The USB port is configured as a USB slave device and emulates a serial port for the PC. Drivers are also available from FTDI for the Mac or Linux (FTDI 232RL running in serial emulation mode, normally VCP type driver).
PC side programs
Any program on the PC that can communicate with a serial port can send or receive data to the ARMexpress eval PCB or the ARMmite. This would include MSCOMM and Visual BASIC. Also various C's including GCC. Other options include Perl or Tcl scripts.
The TclTerm.tcl is the source for a Tcl program that operates as a terminal emulator for Coridium products. You can use it if you have access to any of the GPL Tcl interpreters, or a compiled version is available on the Coridium Support page. The sources are also installed with MakeItC and BASICtools.
Baudrate will remain at 19.2Kb, unless changed by the user program which can be done with
Output of Data to PC
The ARMbasic program can use PRINT, or TXD0
Input of Data from PC
An ARMbasic program should use RXD0. These routines will return -1 if no data is available. This allow the users program to continue doing other tasks, or the user program can loop waiting for input on RXD0.
DEBUGIN in a user program will wait for data, even if that is for ever. It is not a good practice to use this function for sending data back to the PC. Its operation is recommended for user interaction with programs during the development stage, while using BASICtools.