Specifications

Getting Started 19
3.3.1 Running Sample Program FLASHLED.C
This sample program will be used to illustrate some of the functions of Dynamic C.
First, open the file FLASHLED.C, which is in the SAMPLES/RCM2000 folder. The program
will appear in a window, as shown in Figure 5 below (minus some comments). Use the
mouse to place the cursor on the function name WrPortI in the program and type <Ctrl-H> .
This will bring up a documentation box for the function WrPortI. In general, you can do
this with all functions in Dynamic C libraries, including libraries you write yourself. Close
the documentation box and continue.
Figure 5. Sample Program FLASHLED.C
To run the program FLASHLED.C, open it with the File menu (if it is not already open),
then compile and run it by pressing F9 or by selecting Run in the Run menu. The LED on
the Prototyping Board should start flashing if everything went well. If this doesn’t work
review the following points.
• The target should be ready, which is indicated by the message “BIOS successfully com-
piled...” If you did not receive this message or you get a communication error, recom-
pile the BIOS by typing <Ctrl-Y> or select Recompile BIOS from the Compile menu.
main(){
int j;
WrPortI(SPCR,&SPCRShadow,0x84);
WrPortI(PADR,&PADRShadow,0xFF);
while(1) {
BitWrPortI(PADR,&PADRShadow,1,1);
for(j=0; j<32000; j++);
BitWrPortI(PADR,&PADRShadow,0,1);
for(j=0; j<25000; j++);
} // end while
} // end of main
C programs begin with main
Start a loop
Time delay by counting
to 32,000
End of the endless loop
Note: See the Rabbit 2000 Microprocessor User’s Manual
(Software Chapter) for details on the routines that read and
write I/O ports.
Set up Port A to output
to LED DS2 and DS3
Turn LED DS3 off
Turn LED DS3 on
Time delay by counting
to 25,000