SBL Bootloader when using UART

Hi Derek,

I didn't succeed to get the UART interface running. However SPI is working fine so the CC2530 is okay.

Please can you share about your setup ?

Are you connected to:

- P1_4/P1_5/P1_6/P1_7 for CTS/RTS/TX/RX and P1_2/P2_0 for CFG0/CFG1

or

- P0_4/P0_5/P0_3/P0_2 for CTS/RTS/TX/RX and P0_0/P0_1 for CFG0/CFG1

Which ZNP image are you using ?

Many thanks in advance. Best regards, Patrick

Hello,

   I'm connected to P1.4/5/6/7 and am using a modified version of ProdHex; modified to run on that USART. I can see the SYS_RESET_IND message sent 50 seconds after startup, and after that I can send/receive on the UART interface just fine. But can't skip the SBL. Do you have a logic analyzer trace?

   I can see on a logic analyzer that the 0x07 is going to the CC2530, but nothing happens. Since the SBL doesn't use flow control, it doesn't matter what those signals are, right?

Thanks,

Derek

"Since the SBL doesn't use flow control, it doesn't matter what those signals are, right?"

That's exactly what I thought when I got Dirty Harry's reply about turning handshake off during the boot loading sequence but, although I didn't check with the logic analyzer since it works fine on my side, I suppose the SBL checks the CTS line level to decide what to do.

Under .netmf, this is now what my code does and it works fine:

public void reset() 

{     

    serialPort.Close();    

    serialPort.Handshake = Handshake.None;     

    serialPort.Open();

    resetPort.Write(false);

    Thread.Sleep(100);

     resetPort.Write(true);

    Thread.Sleep(100);

    serialPort.Write(new byte[] { 0x7 }, 0, 1);

    serialPort.Close();

    serialPort.Handshake = Handshake.RequestToSend;

    serialPort.Open();

}

Patrick.