I am trying to flash the CB3S-FT using the BK7231 Easy UART Flasher. I have OpenBK7231N_QIO_1.17.552.bin firmware. The USB-TTL adapter is on COM9 and is the only com port on the Windows 11 PC. When I briefly short Pin 3 to ground, I receive the following output on the flasher GUI. I have also tried shorting Pin 1 to ground with the same result.
It seems that the COM9 is opening OK but during the reboot there is some conflict with the COM port.
Now is: Sunday, April 21, 2024 9:46:41 AM.
Flasher mode: BK7231N
Going to open port: COM9.
Serial port open!
Getting bus... (now, please do reboot by CEN or by power off/on)
Getting bus failed, will try again - 0/100!
Getting bus failed, will try again - 1/100!
Exception caught: System.UnauthorizedAccessException: Access to the port 'COM9' is denied.
at System.IO.Ports.InternalResources.WinIOError(Int32 errorCode, String str)
at System.IO.Ports.SerialStream.EndWrite(IAsyncResult asyncResult)
at System.IO.Ports.SerialStream.Write(Byte[] array, Int32 offset, Int32 count, Int32 timeout)
at System.IO.Ports.SerialPort.Write(Byte[] buffer, Int32 offset, Int32 count)
at BK7231Flasher.BK7231Flasher.Start_Cmd(Byte[] txbuf, Int32 rxLen, Single timeout)
at BK7231Flasher.BK7231Flasher.linkCheck()
at BK7231Flasher.BK7231Flasher.getBus()
at BK7231Flasher.BK7231Flasher.doGetBusAndSetBaudRate()
at BK7231Flasher.BK7231Flasher.doGenericSetup()
at BK7231Flasher.BK7231Flasher.doReadAndWriteInternal(Int32 startSector, Int32 sectors, String sourceFileName, WriteMode rwMode)
at BK7231Flasher.BK7231Flasher.doReadAndWrite(Int32 startSector, Int32 sectors, String sourceFileName, WriteMode rwMode)
