Hello krish_free,
CodeWarrior for MPC55xx v1.5 indeed doesn't support USB-ML-PPCNEXUS.
I'd suggest you to try to integrate P&E debugger with CodeWarrior v1.5.
In case you have installed newer codeWarrior e.g. v2.3 the 3-rd party P&E debugger is installed together with CW ("c:\Program Files\Freescale\CodeWarrior for MPC55xx V2.3\pemicro\cw_icdppcnexus.exe" ).
Here are the integration steps:
1. Open Project Settings (ALT+F7)
2. In the "Target" section select "Build Extras"
3. Check the box "Use External Debugger"
4. Enter path to the P&E debugger into "Application" Edit box. e.g. (C:\Program Files\Freescale\CodeWarrior for MPC55xx V2.3\pemicro\cw_icdppcnexus.exe)
5. Enter "Arguments" according to the setting of your target. e.g.
"internal FLASH.out" LOADTOFLASH -RESETFILE "mpc5500_booke.mac"or
RAM.out LOADTORAM -RESETFILE "mpc5500_booke.mac"6. set "Initial directory" e.g. "{Project}bin"
Now the debug button should run P&E debugger.
Note:
CodeWarrior v2.x Special Edition includes just starter edition debugger that allows you to debug just 128kB of code.
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=CW-SUITE-SPECIAL