By TIM1 timer control, so that the output of each channel into the dead zone of complementary PWM output, the output frequency of each channel are 17.57KHz. Among them, the channel 1 output 50 duty cycle, channel 2 output 25 duty cycle, channel 3 output duty cycle of 12.5 . The channel output is inverted complementary output. TIM1 timer channel 1 to 3 of the output corresponding to PA.08, PA.09, PA.10 pin, while channels 1 to 3 correspond to the complementary output PB.13, PB.14 and PB.15 pin, These pins are an oscilloscope is wiring, GND pin is connected to the negative terminal oscilloscope, the oscilloscope channel to see the corresponding PWM output duty cycle.

STM32-TIM1-PWM.pdf

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