Timer functions expaination and TimerPrescaleMatchSet

• LaunchPad CC3200
• Energia 14
• Windows 7 64-bit

Hi all,

I'm trying to generate a PWM signal but I can understand relationship between this commands:

MAP_TimerLoadSet
MAP_TimerMatchSet

MAP_TimerPrescaleSet

MAP_TimerPrescaleMatchSet

Suppose I prescale Cpu_freq to 255.

Now I've done two test with a Led:

If I use TimerPrescaleMatchSet:

- TimerLoadSet and TimerMatchSet are ignored;

- I have more brightness led;

- I can change duty cycle with TimerPrescaleMatchSet.

If I don't use TimerPrescaleMatchSet and set TimerLoadSet and TimerMatchSet at 60000 and 30000:

- I have very weak brightness led;

- If I reduce TimerLoadSet and TimerMatchSet, change only brightness and not it's blinking Frequency;

- If I change TimerLoadSet and TimerMatchSet value, for example 60000 and 1000, change only brightness and not it's blinking Frequency or Duty Cycle.

My questions are:

- Why this difference in Led brightness?

- If TimerLoadSet should count to 0 and TimerMatchSet determinate wave change from 1 to 0 and 0 to 1, why they change only Led brightess and not Duty Cycle and Freq.?

- Why this difference between TimerPrescaleMatchSet and TimerLoadSet in Led brightness?

- Why User Driver Guide say me maximum TimerPrescaleSet is 255, shouldn't it be 65535 since it's a 16bit register(like TimerLoadSet and TimerMatchSet)?

Thank you.