Hello Zoltan,

I updated. Now I have this errors:

Error: Class "RCC_OscInitTypeDef" has no member "HSEPredivValue" in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 39, Col: 24 Error: Identifier "RCC_HSE_PREDIV_DIV1" is undefined in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 39, Col: 41 Error: Class "RCC_PLLInitTypeDef" has no member "PLLMUL" in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 42, Col: 28 Error: Identifier "RCC_PLL_MUL9" is undefined in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 42, Col: 37 Error: Identifier "RCC_ADCPCLK2_DIV6" is undefined in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 51, Col: 40 Error: Identifier "RCC_USBCLKSOURCE_PLL_DIV1_5" is undefined in "mbed-STM32F103C8T6/SysClockConf.cpp", Line: 52, Col: 40 Info: Unable to download. Fix the reported errors...

What can I do?

Best regards, Peter

Hello Peter,
It seems that you haven't added the NUCLEO-F103RB board to your targets yet. To fix this, open the project in the online compiler and check the button located in the top-right corner. Most likely it says NUCLEO-L432KC (the only platform indicated on your profile page at the present). Click on that button and then in the popup menu click on Add platform. A new page opens listing all supported mbed boards. Click on the NUCLEO-F103RB board. Once the specification page is opened, click on the orange button Add to your mbed compiler located on the right side. Then go back to your compiler page and click again on the "NUCLEO-L432KC" button (located in the top-right corner). This time the popup menu should offer your also the NUCLEO-F103RB board. So select that and to confirm, click on the Select platform button located in top-right corner. Now repeat the compilation for this target board. It should work fine.

Hello Zoltan, this was the right hint. Now I can compile. Thanks!

Is there a way to put the "standard" mbed boot loader on the board to allow updating the user app via usb file system?

Alternatively can you recommend a basic IDE which allows debugging, running on Linux and where the exported software can be directly used? What would be your first option?

Thanks, Peter

Hello Peter,
Devan Lai has done a good job to support STM32F103C8T6's easy firmware upload:
https://developer.mbed.org/users/devanlai/code/USBDevice_STM32F103/
https://developer.mbed.org/users/devanlai/code/STM32F103C8T6_WebUSBDFU/

The following link could be of help to choose an offline IDE :
https://developer.mbed.org/questions/76831/Offline-CompileDebugger-Best-free-soluti/

Zoltan