Stm32 and driving a stepper motor drive problem-CodePudding

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Stm32 and driving a stepper motor drive problem

Time：09-17

After press the switch, voltage drive b + b - port, a + a - port is not voltage, have know what causes it?

CodePudding user response:

refer to the original poster weixin_44488052 response:

, after pushing the switch drive voltage b + b - port, a + a - port is not voltage, have know what causes it?

His book about ah