mxyxbb / super-8ch-pwm-dac

8路方波声音合成到1路dac进行输出，通过功放驱动喇叭

super buzzer music lib

This lib can play some MIDI music.

Output method: 8 channel pwm in 1 channel dac

Platform: STM32F407VE, HAL Lib

First choose the midi music that you enjoy and download it, then you'll get xxx.mid.

Then, use this mxyxbb/python-midi-to-c: 将midi文件转换为适合c语言处理的数组文件 (github.com)

to convert the xxx.mid, you will get music_xxx.h

just place the file music_xxx.h under the path \super-8ch-pwm&dac\Buzzer

then include music_xxx.h in the music_buzzer_driver.c

then adjust the function void music_Play(uint8_t index)

The preparation is finished.

Next, run the function void wave_gen() at a freq of 25kHz,

and run the function void music_Play(uint8_t index) at a freq of 1kHz.

Finally the wave will output at PA4 by default.

Ps:

1. if you want to run void wave_gen() at a different freq, remember to adjust the DEFINE of IT_FREQ at the file music_buzzer_driver.c according the commit.
2. you can change the #if 0 into #if 1 in the function void setBuzzer(uint8_t channel, uint32_t newFreq) to enable the PWM output method. In this method, remember to initialize the PWM peripheral.