RTT is fairly easy to integrate with Windows using the Segger supplied dlls and SDK. We used it to automate production testing of a M4 based device at an offshore CM. The EOL PC ran a C# program - I had to add a few p/invoke signatures to use the RTT calls in the dll ...

[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct JLINK_RTTERMINAL_START_t {
public UInt32 ConfigBlockAddress;
public UInt32 Dummy0;
public UInt32 Dummy1;
public UInt32 Dummy2;
}

[DllImport("JLinkARM.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
unsafe public static extern int JLINK_DownloadFile(sbyte[] sFileName, UInt32 Addr);
[DllImport("JLinkARM.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
unsafe public static extern int JLINK_RTTERMINAL_Control(UInt32 Cmd, ref JLINK_RTTERMINAL_START_t rtt_info);
[DllImport("JLinkARM.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
unsafe public static extern int JLINK_RTTERMINAL_Read(UInt32 BufferIndex, sbyte[] sBuffer, UInt32 BufferSize);
[DllImport("JLinkARM.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
unsafe public static extern int JLINK_RTTERMINAL_Write(UInt32 BufferIndex, sbyte[] sBuffer, UInt32 BufferSize);

The beauty of using RTT is leveraging the JTAG bed-of-nails fixture for both programming and board test - no cables or connectors are installed until the board is proved out.

Hi,

sorry for the delay in response.

Has any plans been made for letting RTT support retargeting of syscalls (open, read, write etc.) to be able to interact with files on the host machine?

Similar to semihosting?
Currently, there are no plans on our side to implement anything like this in RTT.
However, it is of course possible to use the J-Link SDK (Part No 8.08.06 on the price list) in order to write an application that interprets the data send by the target and does what ever you would like it to do on the host machine.
Would it help if i would provide you with an excerpt of the SDK documentation (UM8002)?

- How do we implement the RTT tools on the PC (JLinkRTTLogger.exe etc.) in an automated setup? We need to be able to specify which RTT channel to listen to, debugger interface, MCU type etc. I haven't been able to find any way to specify this

There are plans to update the tools available for RTT (among other features and changes) with command line parameters for automation, but there is no fixed release date yet. This can also be done using the SDK.

Best regards,
Niklas

Hi Rals,

Unfortunately, the excerpt we give out to the public (As the SDK is not available to the public) contains actually less information than the information rmilne provided.

However,

the example shown by rmilne indicates that it will be rather simple to implement

I can confirm the assumption.

Short summary of the SDK terms:
One license fee provides / allows to:

• 6 Months of support
• Company-wide-license (Company wide usage of applications using the SDK)
• Unlimited number of developers of the licensed company can use the SDK
• Authorization to distribute and ship software [outside the licensed company] which uses the J-Link SDK or parts of it can be permitted by SEGGER upon request.

If there are further questions regarding SEGGER RTT, do not hesitate to ask me.

Best regards,
Niklas