Digi RCM4000 user manual Run a Sample Program, Troubleshooting

2.3 Run a Sample Program

If you already have Dynamic C installed, you are now ready to test your programming connections by running a sample program. Start Dynamic C by double-clicking on the Dynamic C icon or by double-clicking on dcrab_XXXX.exe in the Dynamic C root directory, where XXXX are version-specific characters.

If you are using a USB port to connect your computer to the RCM4000, choose Options > Project Options and select “Use USB to Serial Converter” under the Communications tab. You may have to determine which COM port was assigned to the RS-232/USB converter.

2.3.1 Run a Sample Program

Find the file PONG.C, which is in the Dynamic C SAMPLES folder. To run the program, open it with the File menu, compile it using the Compile menu, and then run it by selecting Run in the Run menu. The STDIO window will open on your PC and will display a small square bouncing around in a box.

2.3.2 Troubleshooting

If Dynamic C appears to compile the BIOS successfully, but you then receive a communi- cation error message when you compile and load a sample program, it is possible that your PC cannot handle the higher program-loading baud rate. Try changing the maximum download rate to a slower baud rate as follows.

•Locate the Serial Options dialog in the Dynamic C Options > Project Options > Communications menu. Select a slower Max download baud rate.

If a program compiles and loads, but then loses target communication before you can begin debugging, it is possible that your PC cannot handle the default debugging baud rate. Try lowering the debugging baud rate as follows.

•Locate the Serial Options dialog in the Dynamic C Options > Project Options > Communications menu. Choose a lower debug baud rate.

If you receive the message No Rabbit Processor Detected, the programming cable may be connected to the wrong COM port, a connection may be faulty, or the target system may not be powered up. First, check to see that the power LED on the Prototyping Board is lit and that the jumper across pins 5–6 of header JP10 on the Prototyping Board is installed. If the LED is lit, check both ends of the programming cable to ensure that it is firmly plugged into the PC and the programming port on the Prototyping Board. Ensure that the module is firmly and correctly installed in its connectors on the Prototyping Board.

If there are no faults with the hardware, select a different COM port within Dynamic C. From the Options menu, select Project Options, then select Communications. Select another COM port from the list, then click OK. Press <Ctrl-Y>to force Dynamic C to recompile the BIOS. If Dynamic C still reports it is unable to locate the target system, repeat the above steps until you locate the active COM port.You should receive a message Bios compiled successfully once this step is completed successfully.

12 RabbitCore RCM4000