ComPtr MakePin()

in BusTools/GpioTestTool/main.cpp [95:128]

• 31 lines of code
• 6 McCabe index (conditional complexity)

ComPtr<IGpioPin> MakePin (int PinNumber)
{
    auto controller = MakeDefaultController();

    ComPtr<IGpioPin> pin;
    HRESULT hr = controller->OpenPin(PinNumber, pin.GetAddressOf());
    if (FAILED(hr)) {
        switch (hr) {
        case E_INVALIDARG:
            throw wexception(
                L"The pin could not be opened because the pin number is invalid "
                L"or an invalid parameter was specified to OpenPin(). "
                L"Run 'GpioTestTool -list' to see the list of available pins.");
        case __HRESULT_FROM_WIN32(ERROR_SHARING_VIOLATION):
            throw wexception(
                L"The pin could not be opened due to a sharing violation. "
                L"Ensure the pin is not already in use.");
        case __HRESULT_FROM_WIN32(ERROR_NOT_FOUND):
            throw wexception(
                L"The pin could not be opened because it is not accessible to "
                L"usermode applications. Run 'GpioTestTool -list' to see the list "
                L"of available pins.");
        case __HRESULT_FROM_WIN32(ERROR_GPIO_INCOMPATIBLE_CONNECT_MODE):
            throw wexception(
                L"The pin could not be opened because it is currently muxed "
                L"to a different function (e.g. I2C/SPI/UART). Ensure this pin "
                L"is not in use by another function.");
        }

        throw wexception(L"Failed to open pin. (hr = 0x%x)", hr);
    }

    return pin;
}