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stm32-course/Examples/PWM_DRV8833/Readme.md

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初始化版本
2 years ago
# PWM_DRV8833
- 需要打开外部晶振，将SYSCLK配置到72MHz，APB timer clocks也配置到72MHz
- 给PA0、PA1分别配置TIM2_CH1、TIM2_CH2
- 进入Timers - TIM2
- Clock Source配置Internal Clock
- Channel1配置PWM Generation CH1
- Channel2配置PWM Generation CH2
- Prescaler配置为72-1，Counter Period配置为100-1，这样PWM频率就是10kHz
- HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1) 启动PWM输出
> CH1和CH2，同时只能有1个通道输出
>
> 切换输出通道，可以切换正/反转
- __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, 80) 可以改变占空比
> 占空比低于60%有可能导致电机转不起来
>
> 占空比 = 此数值 / Counter Period
- 接线
- 用4P杜邦线，连接开发板和模块，模块接GND-VCC-IN2-IN1
- 电机两根线连接模块OUT1-OUT2