Does STM32F103C8T6 support composite USB device(CDC + HID) ?

Vivek yadav1 · ‎2020-01-08

I am doing a project on STM32F013C8T6 MCU Where i need some USB functionality.

I am bit confused in many STM32 MCUs.

So I need some suggestion. which one i should buy.

My requirements are as following.

1: My STM MCU should work as USB Host and Client.

2: MY STM MCU should be capable to make composite USB device(1CDC + 2HID) or any other USB class.

Note : I have successfully implement a project where keyboard+Mouse+Point of Scale are all together as custom HIDs on my STM32F103C8T6.

Let me Know if you can help me in anyway or any Query about my Question.

Thanks & Regards

@Vivek Yadav

waclawek.jan · ‎2020-01-09

The USB module in 'F103 is Device only, i.e. you can't use it as Host.

You may want to have a look at the OTG USB module which is present in 'F105/'F107, 'F2xx, 'F4xx, 'F7xx and the upper-end 'L4.

Composite device is matter only of software (if there are enough endpoints of course) - you have to construct the configuration descriptor so that it includes both (or all) classes (marking them by the IAD descriptor), and then handle all the respective requests. I don't know if there are usable examples in Cube or if this is clickable in CubeMX, I don't use Cube/CubeMX.

JW

View solution in original post

waclawek.jan · ‎2020-01-09

The USB module in 'F103 is Device only, i.e. you can't use it as Host.

You may want to have a look at the OTG USB module which is present in 'F105/'F107, 'F2xx, 'F4xx, 'F7xx and the upper-end 'L4.

Composite device is matter only of software (if there are enough endpoints of course) - you have to construct the configuration descriptor so that it includes both (or all) classes (marking them by the IAD descriptor), and then handle all the respective requests. I don't know if there are usable examples in Cube or if this is clickable in CubeMX, I don't use Cube/CubeMX.

JW

Vivek yadav1 · ‎2020-01-09

Thank you @Community member

your answer is very much clear to me.