I am using the PWM in centered mode and I would like to try using the high resolution fraction bits. I am not sure how to set the fractional bits for VAL2 since VAL2 has a negative number and the counter is counting up from a negative number.
SM1INIT = -1000;
SM1VAL1 = +1000;
Say I wanted to set the duty cycle to about 50%.
VAL2 = -500;
VAL3 = +500;
Can I use FRACVAL3, and FRACVAL2, to obtain a duty cycle of 1001.5 counts? Does this mean you set the FRACVAL3 to 0.25 and FRACVAL2 to 0.75 and VAL2 to -501?
I am using the MC56F82xxx series but this would apply to other processors as well.
Thanks, any tips are welcome.