how can i caculate actual PWM frequency ??? I use TPU to creat PWM but can't caculate actual frequency of it.
Hi,
The frequency is based on the Pclk (peripheral bus clock) divided by the counter trigger value (less 1, as the count starts at 0). The counter is incremented each* Pclk cycle and ramps up until the trigger is reached when the output is toggled and the counter rest to zero.
There are optional Pclk division flags, e.g. div 4 will mean the counter increments at a quarter the Pclk frequency, so the final frequency will by Pclk/(4*(trigger-1)).
AndyS
Hi Andrew ,
what did you mean here "trigger"