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Thanks Ronald, good point.

Harry

If you have CCP1 and CCP2 available you may be better off using the IRQ approach to producing the wavformes.

Thanks Treitmey, I've actually got code that does that. I was just playing around with s ...

I guess the PIC was resetting.

I was powering the servo off the board. I tried powering the servo with a separate battery and common ground and it started working.

Thanks for pointing me in the ...

And did it help to improve things?
If not, is it possible the PIC is resetting due to voltage spikes caused by the servo's?

No, The while(1) statement didn't change anything. But possibly the PIC ...

A single call to either of the servo routines takes about 20ms. You call each function 25 times in succession: 25 * 20ms = 450ms.
I'm sorry, I don't understand your point here. The servo should mov ...

I've got a couple of "for" loops that I think should run one after the other but they seem to form some type of nested loop that runs forever. If printf statements are substituted for the two servo po ...

What compiler version?.
There was a bug that applied to a few versions, where if the 'carry' flag is set from one arithmetic operation, it incorrectly gets displayed as a 'sign', in printf...
If you ...

Can you show us the declarations for these variables and the math that calculates them? I suspect somewhere you are using an unsigned type to hold a signed value.

I don't think I've done that but ...

What compiler version?.
There was a bug that applied to a few versions, where if the 'carry' flag is set from one arithmetic operation, it incorrectly gets displayed as a 'sign', in printf...
If you ...

In a debugging exercise I print out 3 variables. The calculations are all done correctly but two of the printed values, Accel_percent and Avg may or may not show a minus sign, it seems almost arbitrar ...

Thanks for the great explanation!

Harry

I've got version 3.245 and am using a 16F877.

When I write the following code it will work if I declare torque as an 8 bit variable but not if I declare it as a 16 bit variable:set_pwm1_duty(to ...

Thanks guys, that fixed it. I think I understand the "=" vs "==" better too.

Harry

if (delta_portb = 0x80 || 0xc0) //If PIN_B7 has changed

I tried changing the line to:if ((delta_portb = 0x80) || (delta_portb = 0xc0))

I think that provides the c ...

I'm trying to develop a program that will calculate the duty cycle of an ADXL202E accelerometer on an 16F877 PIN_B7 using #int_RB. Here's the code of the interrupt service routine.

#int_RB

void ...