Stm32f051r8t6 as a HID keyboard

I have a stm32f051r8t6 discovery board and I want to use as a HID keyboard what can I do

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Super User

Since stm32f051 does not have USB, you can implement a HID over I2C device.

See here.

Also, you can take a cheap PS/2 to USB keyboard/mouse adapter, solder it to your board and simulate a PS/2 keyboard with GPIOs.

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