Subject:
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Read me first! Re: case statement doesn't work- any clue?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 3 May 1999 15:40:40 GMT
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Viewed:
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3798 times
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Nevermind. Dangit. Forgot break statements like a moron.
-Luis
On Mon, 3 May 1999, Luis Villa wrote:
> I'm trying to program some very rudimentary debugging stuff- just
> outputting variables to the screen. Basically, I want to use a switch/case
> statement to read an integer variable (in this case ID_number)
> which is then linked (by the case statement) to universal variables
> elsewhere in the code. Each case should output it's ID#, and then the
> value of the variable which has been ID'd. Then it should wait for the
> next button push to output the next variable.
>
> The problem is that the case statement appears to fail completely.
> Instead of outputting one value and then incrementing ID_number and
> waiting, it outputs all the values, and *then* waits for the button push ,
> as if they were a continuous list and not a case statement. Is this just
> poor coding on my part? Is this one of these hidden C/C++ differences? Or
> is this another LegOS limitation? (I'm leaning towards the last, but have
> not had a change yet to test this more generally.)
>
> The applicable code is below. If you'd like to grab the .srec, it's at
> http://arthurdent.dorm.duke.edu/legos/code/light-brait-w-debug.srec
>
> Thanks ahead of time!
> -Luis
> P.S. I tried incrementing both inside the case statement (as the attached
> code shows) and after the case statement. Neither one worked.
>
> int variable_output()
> {
> int ID_number=0; //for the switch statement
>
> while(1)
> {
> wait_event(&button_press_wakeup,BUTTON_PROGRAM); // wait for PROG
>
> switch(ID_number)
> {
> case 0:
> //this should only run the first time the debugger is activated
> {
> cputs("debug"); //indicate start
> lcd_refresh();
> ID_number=1; //increment the counter to the next variable
> }
> case 1:
> //light sensor #1
> {
> cputs("light"); //outputs "light" then "1" to ID the variable
> lcd_refresh();
> msleep(300);
> new_lcd_int(1,PRINT_TIME);
>
> new_lcd_int(LIGHT_1,PRINT_TIME); //this time is irrelevant
> and should be removed once I confirm the code works
> ID_number+=1; //increment the counter to the next variable
> }
> case 2:
> //light sensor #2
> //since this is the last case, the counter is returned to 1
> instead of being incremented
> {
> cputs("light"); //outputs "light" then "1" to ID the variable
> lcd_refresh();
> msleep(300);
> new_lcd_int(2,PRINT_TIME);
>
> new_lcd_int(LIGHT_2,PRINT_TIME);
> //PRINT_TIME is irrelevant here-
> //the code will wait for the button press no matter what.
>
> ID_number=1; //resets the counter to begin the loop again
> }
>
> cputs("test");
> lcd_refresh();
>
> wait_event(&button_release_wakeup,BUTTON_PROGRAM); // wait for PROG
> button to be released
>
> //maybe code in an exit case?
>
> }
> }
> }
> #######################################################################
>
> God was my co-pilot,
> but we crashed in the mountains
> and I had to eat him.
> -bumper sticker
>
> #######################################################################
>
>
#######################################################################
God was my co-pilot,
but we crashed in the mountains
and I had to eat him.
-bumper sticker
#######################################################################
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Message is in Reply To:
 | | case statement doesn't work- any clue?
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| I'm trying to program some very rudimentary debugging stuff- just outputting variables to the screen. Basically, I want to use a switch/case statement to read an integer variable (in this case ID_number) which is then linked (by the case statement) (...) (27 years ago, 3-May-99, to lugnet.robotics.rcx.legos)
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