TMS320F2800157: LAUNCHXL-F2800157 Error -2131 @ 0x0 cannot connect via CCS

Hello Naohiro,

Thank you for providing the detailed information about your connection issue with the LAUNCHXL-F2800157.

Since you've already verified JTAG integrity and adjusted the TCLK frequency without success, let's try the following steps:

1. Verify Hardware Connections

• Ensure the USB cable is properly connected and the board is receiving power
• Check that all jumpers on the LaunchPad are in their default positions
• Verify the isolation jumpers are properly configured for XDS110 debug probe operation

2. Reset the Target Device

• Power cycle the LaunchPad completely (disconnect and reconnect USB)
• Try holding down the device reset button while initiating the connection in CCS

3. Update XDS110 Firmware

• In CCS, go to View → Target Configurations
• Right-click your configuration and select "Show all properties"
• Look for the XDS110 firmware update option and ensure you have the latest version

4. Check for Device Security

• The F2800157 may have security features enabled that prevent debug access
• If the device was previously programmed, code security settings could be blocking JTAG access
• You may need to perform a device erase/unlock procedure

5. Try GEL File Initialization

• Ensure the proper GEL file for F2800157 is loaded in your target configuration
• The GEL file handles device initialization which may resolve register access issues

6. Alternative Connection Method

• Try connecting with "On Connect: Reset the target" disabled in your target configuration
• Alternatively, try connecting while the device is held in reset

If these steps don't resolve the issue, please provide:

• Your target configuration file settings
• Whether this is a new board or if it was previously working
• Any custom code or security settings that may have been programmed

Best Regards,
Zackary Fleenor