8. Pwmout

8.1. Function description:

This demo shows how to configure the TIMER peripheral in PWM (Pulse Width Modulation) mode. The TIMxCLK frequency is set to systemcoreclock 8MHz, the prescaler is 8.

For instance:

ADVANCED_TIMERn counter clock is 1MHz pwm freq 62.5Hz.

ADVANCED_TIMERn Channel1 duty cycle = (4000/ 16000)* 100 = 25%.

ADVANCED_TIMERn Channel2 duty cycle = (8000/ 16000)* 100 = 50%.

ADVANCED_TIMERn Channel3 duty cycle = (12000/ 16000)* 100 = 75%.

8.2. Test result:

The output signal as the following description:

The channel 1 duty cycle is set to 25%.

The channel 2 duty cycle is set to 50%.

The channel 3 duty cycle is set to 75%.

8.3. IO connection:

NONE

8.4. Output pad:

PAD
pad_ADVANCED_TIMERn_bkin
pad_ADVANCED_TIMERn_etr
pad_ADVANCED_TIMERn_ch1_i
pad_ADVANCED_TIMERn_ch2_i
pad_ADVANCED_TIMERn_ch3_i

Note

The ‘m’ and ‘n’ in “advtimer_timerm” and “advtimer_timern” indicate the peripheral number.