STM32CubeMX 3 Unlock PWM module

Today, under the guidance of a low-level expert, I learned how to configure the PWM module! Woof!

First open the file configured last time, as follows: 

Then, we need to use TIM1 to set PWM: 

Then, the clock configuration does not need to be changed 
. 

Double-click and the following window will pop up automatically: 

Box 1 is the pre-scaling. Since the main frequency of our chip is 72MHz, the pre-scaling selection of 71 means that the timing frequency of this timer is actually 72M/(1+71)=1MHz, that is, the time interval for each addition (incremental count) or subtraction (decremental count) of this timer is 1/1M=1 microsecond.

Box 2 is the period length of the timer counter. Here, 10000 is written, which means that every time the counter reaches 10000, it will be reset and start counting again. This number determines the period of the PWM wave. Here, the period of the PWM wave is 1uS*10000=0.01S.

Boxes 3 and 4 are the variables that determine the duty cycle of the two channels. 3000 means 3000/10000=30%, a thirty percent duty cycle. 4000 here means a 40% duty cycle.

In the same window, select a different page:

NVIC is an interrupt priority manager. Since PWM does not generate interrupts here, this interrupt is optional. We do not select it here.

Then code generate.

Then 

Add these two sentences! Then you can find the PWM wave in those two ports! (After testing, there is no problem so far)

Ps: Use library function: 

The structure of opening Lib is probably like this: 

The content is as follows: 

Add the Lib file to the location just shown, build the required files, and then join the Lib group:

Then package compilation path:

After writing, sprinkle flowers