USB Keyboard - USB HID not enabled

[ThomasHulme]

I'm trying to setup an STM32 Bluepill as a USB keyboard. In the Arduino IDE the settings in Tools are:

In platformio.ini the settings I have are:

However I get the error:

error "USB HID not enabled! Select 'HID' in the 'Tools->USB interface' menu."

I have the "PIO_FRAMEWORK_ARDUINO_ENABLE_HID" in the build flags.

Is there anything I'm missing??

[jonasled]

I have the same problem, so I think this is a bug.

[maxgerhardt]

I have the "PIO_FRAMEWORK_ARDUINO_ENABLE_HID" in the build flags.

As you can see in the docs this is a configuration for the STM32Duino core. But you have defined genericSTM32F103C8 as the board in the platformio.ini, so it will use

https://github.com/platformio/platform-ststm32/blob/35b13fb34b1ce3f341f86e91f76307ee04a80ffc/boards/genericSTM32F103C8.json#L3

the maple core (framework-arduinoststm32-maple) and not STM32Duino core.

Then you also cross-mix libraries for STM32Duino into this build with the lib_extra_dirs command, which doesn't look healthy.

So which exact core do you want to use?

[jonasled]

I tried it also with bluepill_f103c8 as board, which uses stm32 as core and there the error also occurs.

[jonasled]

My platformio.ini:

[env:bluepill_f103c8]
platform = ststm32
board = bluepill_f103c8
framework = arduino
build_flags = -D PIO_FRAMEWORK_ARDUINO_ENABLE_HID

[maxgerhardt]

The framework needs additional configuration, see

https://github.com/stm32duino/Arduino_Core_STM32/blob/3a9c71c6347c32e47ab3437a7713c96388d60605/libraries/Keyboard/src/Keyboard.h#L27-L29

By using additional flags listed in https://community.platformio.org/t/difficulty-with-getting-usb-serial-usb-cdc-working/7501/6?u=maxgerhardt I can get an example to compile.

[env:bluepill_f103c8]
platform = ststm32
board = bluepill_f103c8
framework = arduino
build_flags = 
    -D PIO_FRAMEWORK_ARDUINO_ENABLE_HID
    -D USBCON
    -D USBD_VID=0x0483
    -D USB_MANUFACTURER="Unknown"
    -D USB_PRODUCT="\"BLUEPILL_F103C8\""
    -D HAL_PCD_MODULE_ENABLED

#include <Arduino.h>
#include <Keyboard.h>

void setup() {
    Serial.begin(9600);
    Keyboard.begin();
}
void loop() {
    Keyboard.write((uint8_t)'A');
    Serial.println("Loop");
    delay(500);
}