Posted on September 15, 2011 at 05:54TIM_Prescaler = N - 1; Divides the Bus/TIM clock down by N
TIM_Period = N - 1; Divide that clock down by N, ie the *period* is N ticks.
So assume your TIMCLK is ticking at 72 MHz, the *external* clock
If TIM_Prescaler = 71; the timers *internal* clock will be 1 MHz
If TIM_Period = 999; the 1MHz is divided by a 1000, so it becomes 1KHz
Your update interrupt with fire every 1ms
Now if you want to play with the channels, say in a PWM mode you can play with the output pins.
If TIM_Pulse = 500; the channel will out a frequency of 1 KHz, with a 50/50 duty cycle. ie TIM_Pulse = N / 2
