stm32 ARM单片机的PWM输出，然后通过通过ADC采样，并且在2.8寸液晶触摸屏幕上显示PWM动态的电压点位和ADC值，pwm频率和占空比可以通过改变定时器值而调整-STM32 ARM microcontroller PWM output, and then passed through the ADC sampling, and dynamic voltage point of the PWM and ADC values 椠渀 the 2.8-inch LCD touch screen