十速TM57PE12_PWM0应用程序。

PB1,PB2,PB3对应按钮k1,k2,k3.

每次按下K1键，PWM0的波形周期将按50US,100US,150US,200US的顺序循环改变。

每次按下K2键，PWM0的波形占空比将按1/5,2/5,3/5,4/5的顺序循环改变。

每次按下K3键，PWM0输出的波形为默认值（周期50us，占空比为1/5)-Ten Speed TM57PE12_PWM0 applications. PB1, PB2, PB3 the corresponding button k1, k2, k3. Each time you press K1 key, PWM0 waveform cycle will be 50US, 100US, 150US, 200US change the order cycle. Each time you press K2 key, PWM0 duty cycle of the waveform will be 1/5 2/5, 3/5 4/5 in the order cycle changes. Each time you press K3 key, PWM0 output waveform is the default value (cycle 50us, duty cycle 1/5)