Quote: refer to the original poster guoxiuyang response:

how to change the volume of stm32 passive buzzer, the teacher say compared to modify, please help

Then compared to ah,,,,,,,,

No,,,,,,,,,

CodePudding user response:

Went to see some video will, very simple, b went on the site

CodePudding user response:

ST official PWM routines

CodePudding user response:

As long as the delay time of high and low level is different, the duty ratio is different

CodePudding user response:

Change the duty ratio, frequency tone is high, it's loud

CodePudding user response:

Duty cycle changes are not yao, the volume is essentially the size of the voltage/current, duty ratio is high, the average voltage on the
Is usually calculated by the TIMER and duty ratio of PWM cycle

CodePudding user response:

It no other way can only change duty ratio