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STM32 as Host and CH340 based device as USB Device

Mithun_K_Das

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I was working on a project to use STM32F105RBT6 as a USB Host and another device which is CH340 based acting as a device. Now, using the STM32CubeMx, I have generated the code for the USB host that can detect if there is anything in the USB port, can detect if it is disconnected.

While debugging, I can see, that the host side is working fine. At the same time, the device is ok if I test with a PC. But when plugging into the USB HOst circuit with STM32, it is either in Ideal mode or in Starting mode.

I did not use STM32 as a host before. So, if anyone has the same experience please share your suggestions with me.
 

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