The BSL_USB_GUI

Gee

Hi,

I tried to understand and follow the flow of the BSL_USB_GUI source code that is included in 'MSP430 USB Firmware Upgrade Example' package. I'm a bit confused of the RAM BSL, why is it that every time a user code is sent to MSP for updating via USB BSL it send the RAM BSL? Is the pre-programmed BSL that resides in Flash memory of my F5529 can't do it without reprogramming the BSL?

Code snippet from BSL_USB_GUI source code:
 
bool BSL_USB_GUI::DownloadView::DownloadStartUp(BackgroundWorker^ worker, DoWorkEventArgs ^ e , bool * massErased )
{
...
// Get RAM_BSL Data
  BYTE RAM_BSL[20000];
  String^ ramBSLString = resources->GetString(L"RAM_BSL.Text");
  StringToChar(ramBSLString,RAM_BSL);

  // Send RAM BSL
  worker->ReportProgress(20,"Sending RAM BSL v" + resources->GetString(L"RAM_BSL_VERSION") + "\r\n");
  BSL_RX_TXT((char *) RAM_BSL, 1);
  BSL_LoadPC(0x2504);
  worker->ReportProgress(30,"Done RAM BSL v" + resources->GetString(L"RAM_BSL_VERSION") + "\r\n");
  
  // Close BSL connection
  BSL_close_BSL();
...

}

Please help me understand.

Thanks

over 11 years ago

0 zrno soli over 11 years ago

Guru 34793 points

For flashing is used last BSL (RAM) version from USB Firmware Upgrade Example package (or slau319). Default factory USB BSL from target devices is older version, but of course it can be used for flashing.

0 Gee over 11 years ago in reply to zrno soli

Prodigy 120 points

Thanks for the answer.
So, the BSL_RAM will overwrite the default factory USB BSL that resides in flash memory because it is an old version and BSL_RAM is newest, am I correct? If so, why is it that it repeats the process of sending BSL_RAM every time a user code is updated in BSL_USB_GUI? Can I comment that part of the code?

Thanks

0 zrno soli over 11 years ago in reply to Gee

Guru 34793 points

No, BSL RAM will leave USB BSL flash untouched. It will be copied to target device RAM and executed from RAM. Because of this it is updated every time before flashing. You can comment this part. If BSL_USB_GUI don't use any "special" command that is not supported by default factory USU BSL, it should work.

Clarification for RAM USB BSL from Katie...

http://e2e.ti.com/support/microcontrollers/msp430/f/166/t/395608

0 Gee over 11 years ago in reply to zrno soli

Prodigy 120 points

Crystal clear. Thank you very much.

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

The BSL_USB_GUI