Part Number: TMS320F280049C
Hello,
I'm trying to control 8 synchronous PWM modules with 16 outputs in total.
These are separated into two dependent groups of 4 PWM modules with individual settings.
I need the output signals of each PWM module need to be complementary and not inverted.
Also, there needs to be the possibility to implement a phase shift between the two groups, with the above-mentioned restriction.
For safety reasons, i need to calculate the compare register values during operation.
This should eliminate the possibility of accidental overlapping of the complementary signals within the group and also the related complementary signals from the second group.
I'm using the counter configured as Up-Down-Counter.
The signals are generated by checking on compareA and compareB registers up and down events.
Additionally, two modules generate an interrupt, utilizing compareC register for reloading the compareA and compareB registers before the beginning of the next period.
My problem now is that implementing this is only possible, if the two compare registers are updated frequently.
This seems only be stable up to certain PWM frequencies as the speed of the update during the period seems not reliable.
Is there a possibility to utilize compareC and compareD additionally to generate ActionQualifier Events as this would eliminate the need to update the registers during PWM operation?
Alternatively is there another reliable solution for updating the registers?
