HPWM on 18F8722

[Daniel Nielsen]

Hello All,
I could use some help, please. I'm having issues compiling a program to use two PWM channels simultaneously. I get the error:
Error: GCASM: Symbol INITPWM has not been defined Message AT not defined in
messages.dat! CALL INITPWM
I'm using:
GCB Compiler Version
0.98.06
2019-06-12
(Windows 32 bit)
The program is as follows:

'Chip model and speed
#chip 18F8722, 4
#include <lowlevel/pwm.h>

'Configs
#config osc = intio67     'Use the internal clock
#config mclr = off    'Reset handled internally
#config wdt = off     'Give the dog a rest

'Directions
#define PORTC.2 Out 'PWM1, pin 43
#define PORTC.1 Out 'PWM2, pin 35

'Dimensions
dim Ch1DC as Byte 'Duty Cycle 1
dim Ch2DC as Byte 'Duty Cycle 2

'Initialization
Ch1DC = 1
Ch2DC = 255

  Do
      For Ch1DC = 1 to 255
        HPWM 1, 1, Ch1DC
        HPWM 2, 1, Ch2DC
        Ch2DC = Ch2DC - 1
          If Ch2DC <= 1 Then
            Ch2DC = 1
          End If
        Wait 10 mS
      Next

      For Ch1DC = 255 to 1
        HPWM 1, 1, Ch1DC
        HPWM 2, 1, Ch2DC
        Ch2DC = Ch2DC + 1
          If Ch2DC >= 255 Then
            Ch2DC = 255
          End If
        Wait 10 mS
      Next
  Loop

End

Am I doing something wrong?

[Daniel Nielsen]

Sorry for the appearance of the program. I just copied and pasted from the editor and it pasted really strangely.

[Chris Roper]

Fixed the Formatting for you .

[Anobium]

OK.

Try the basics. Does this work? This will show the CCP/PWM is operational. You dont need anything else in this test.

#chip 18F8722, 4

dir portc.2 out
PWMOn

do
loop

[Daniel Nielsen]

Hi Anobium!
Yes, that works fine.

[Anobium]

Now rebuild your code from this.

You know now CCP/PWM1 works. So, focus on that.

NOT NEEDED #include <lowlevel/pwm.h>

'NOT NEEDED  Configs until later... get the basics working
#config osc = intio67     'Use the internal clock
#config mclr = off    'Reset handled internally
#config wdt = off     'Give the dog a rest

'Directions
WRONG.....  #define PORTC.2 Out 'PWM1, pin 43
use DIR
WRONG..... #define PORTC.1 Out 'PWM2, pin 35
use DIR

:-)

[Chris Roper]

This:

#define PORTC.2 Out 'PWM1, pin 43'
#define PORTC.1 Out 'PWM2, pin 35'

should be

Dir PORTC.2 Out 'PWM1, pin 43'
Dir PORTC.1 Out 'PWM2, pin 35'

[Daniel Nielsen]

Oops, that's what it was originally. I messed up the syntax during the heat of battle. I changed it back and still get the same error when I try to compile.

[Daniel Nielsen]

Well, how about that. The two LED's are cycling perfectly now. Were the CONFIGS messing it up?

[Chris Roper]

Were the CONFIGS messing it up?
Quite possibly.

GCBASIC generally takes care of all the config for you.
The #Config derivatives are only there to force specific configs that are not normally used and are Device specific.

I also suggest that you use the Release Candidates if you hit a problem as many bugs get fixed in the background.

That latest is here:
https://sourceforge.net/projects/gcbasic/files/Release%20Candidates/

[Daniel Nielsen]

Thanks much Chris and Anobium. I'll bookmark that link for future reference. I spend a lot of time in the Forums and can usually find solutions to issues I'm having there. I'm sure the Release Candidates will be a powerful resource.