User’s Manual
75
D.2 Running Sample Program DEMOBRD1.C
The sample program DEMOBRD1.C in the SAMPLES\ICOM folder will be used to illustrate
some of the functions of Dynamic C.
Now, open DEMOBRD1.C. The program will appear in a window, as shown in Figure D-2 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 D-2. Sample Program DEMOBRD1.C
To run the program DEMOBRD1.C, open it with the File menu, compile it using the Compile
menu, and then run it by selecting Run in the Run menu. LED1 and LED2 on the Demon-
stration Board should start going on and off 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(PDDDR,&PDDDRShadow,0x03);
WrPortI(PDDCR,&PDDCRShadow,0x00);
while(1) {
BitWrPortI(PDDR,&PDDRShadow,0xFF,0);
BitWrPortI(PDDR,&PDDRShadow,0x00,1);
for(j=0; j<20000; j++);
BitWrPortI(PDDR,&PDDRShadow,0x00,0);
BitWrPortI(PDDR,&PDDRShadow,0xFF,1);
for(j=0; j<20000; j++);
} // end while(1)
} //
end of main
C programs begin with main
Start a loop
Time delay by counting
to 20,000
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 D to output
to LED1 and LED2
Turn on LED1 and
turn off LED2
Turn off LED1 and
turn on LED2
Time delay by counting
to 20,000