Digi JACKRABBIT BL1800 User Manual download pdf (Page 16)

12 Jackrabbit (BL1800)

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.

If you are using a USB port to connect your computer to the Jackrabbit, choose Options >

Project Options

and select “Use USB to Serial Converter” under the Communications

tab.

Find the file PONG.C, which is in the Dynamic C SAMPLES folder. To run the program,

open it with the File menu (if it is not still open), compile it using the Compile menu, and

then run it by selecting Run in the Run menu. The STDIO window will open and will dis-

play a small square bouncing around in a box.

This program shows that the CPU is working.

2.3.1 Troubleshooting

If Dynamic C appears to compile the BIOS successfully, but you then receive a communi-

cation error message when you compile and load the 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 there are any other problems:

• Check to make sure you are using the PROG connector, not the DIAG connector, on the

programming cable.

• Check both ends of the programming cable to ensure that they are firmly plugged into

the PC and the programming port on the Jackrabbit.

• Ensure that the Jackrabbit is firmly and correctly installed in its connectors on the

Prototyping Board.

• 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.

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Digi JACKRABBIT BL1800 User Manual Page 16